diff --git a/Cargo.lock b/Cargo.lock
index 1413928..48049f7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -53,6 +53,7 @@ version = "0.1.0"
 dependencies = [
  "bindgen 0.35.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "embedded-hal 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -98,6 +99,14 @@ dependencies = [
  "vec_map 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "embedded-hal"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "nb 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "env_logger"
 version = "0.5.6"
@@ -171,6 +180,11 @@ dependencies = [
  "libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "nb"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "nom"
 version = "3.2.1"
@@ -346,6 +360,7 @@ dependencies = [
 "checksum cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "d4c819a1287eb618df47cc647173c5c4c66ba19d888a6e50d605672aed3140de"
 "checksum clang-sys 0.22.0 (registry+https://github.com/rust-lang/crates.io-index)" = "939a1a34310b120d26eba35c29475933128b0ec58e24b43327f8dbe6036fc538"
 "checksum clap 2.31.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f0f16b89cbb9ee36d87483dc939fe9f1e13c05898d56d7b230a0d4dff033a536"
+"checksum embedded-hal 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "684b1fa3196f78342296d04edc2a6e5d053729d1b64a819dcb072810d706e267"
 "checksum env_logger 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)" = "0561146661ae44c579e993456bc76d11ce1e0c7d745e57b2fa7146b6e49fa2ad"
 "checksum gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)" = "5e33ec290da0d127825013597dbdfc28bee4964690c7ce1166cbc2a7bd08b1bb"
 "checksum glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "8be18de09a56b60ed0edf84bc9df007e30040691af7acd1c41874faac5895bfb"
@@ -356,6 +371,7 @@ dependencies = [
 "checksum log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "89f010e843f2b1a31dbd316b3b8d443758bc634bed37aabade59c686d644e0a2"
 "checksum memchr 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "148fab2e51b4f1cfc66da2a7c32981d1d3c083a803978268bb11fe4b86925e7a"
 "checksum memchr 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "796fba70e76612589ed2ce7f45282f5af869e0fdd7cc6199fa1aa1f1d591ba9d"
+"checksum nb 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "69f380b5fe9fab8c0d7a6a99cda23e2cc0463bedb2cbc3aada0813b98496ecdc"
 "checksum nom 3.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "05aec50c70fd288702bcd93284a8444607f3292dbdf2a30de5ea5dcdbe72287b"
 "checksum peeking_take_while 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "19b17cddbe7ec3f8bc800887bab5e717348c95ea2ca0b1bf0837fb964dc67099"
 "checksum quick-error 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "eda5fe9b71976e62bc81b781206aaa076401769b2143379d3eb2118388babac4"
diff --git a/Cargo.toml b/Cargo.toml
index 11cab5d..0ff9bd8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,8 +5,9 @@ build = "build.rs"
 authors = ["marcelbuesing <buesing.marcel@googlemail.com>"]
 
 [dependencies]
+embedded-hal = "0.1"
 
 [build-dependencies]
-bindgen = "0.35.0"
-bitflags = "1.0.1"
-gcc = "0.3.54"
+bindgen = "0.35"
+bitflags = "1.0"
+gcc = "0.3"
diff --git a/src/bme680.rs b/src/bme680.rs
new file mode 100644
index 0000000..4dd4af6
--- /dev/null
+++ b/src/bme680.rs
@@ -0,0 +1,999 @@
+pub enum Bme680Error {
+    ///
+    /// aka BME680_E_NULL_PTR
+    ///
+    NulltPtr,
+    ///
+    /// aka BME680_E_COM_FAIL
+    ///
+    CommunicationFailure,
+    ///
+    /// aka BME680_E_DEV_NOT_FOUND
+    ///
+    DeviceNotFound,
+    ///
+    /// aka BME680_E_INVALID_LENGTH
+    ///
+    InvalidLength,
+}
+
+pub type Result<T> = result::Result<T, Bme680Error>;
+
+#[derive(Clone, Copy)]
+#[repr(i32)]
+pub enum bme680_intf {
+    BME680_SPI_INTF,
+    BME680_I2C_INTF,
+}
+
+#[derive(Copy)]
+#[repr(C)]
+pub struct bme680_calib_data {
+    pub par_h1 : u16,
+    pub par_h2 : u16,
+    pub par_h3 : i8,
+    pub par_h4 : i8,
+    pub par_h5 : i8,
+    pub par_h6 : u8,
+    pub par_h7 : i8,
+    pub par_gh1 : i8,
+    pub par_gh2 : i16,
+    pub par_gh3 : i8,
+    pub par_t1 : u16,
+    pub par_t2 : i16,
+    pub par_t3 : i8,
+    pub par_p1 : u16,
+    pub par_p2 : i16,
+    pub par_p3 : i8,
+    pub par_p4 : i16,
+    pub par_p5 : i16,
+    pub par_p6 : i8,
+    pub par_p7 : i8,
+    pub par_p8 : i16,
+    pub par_p9 : i16,
+    pub par_p10 : u8,
+    pub t_fine : i32,
+    pub res_heat_range : u8,
+    pub res_heat_val : i8,
+    pub range_sw_err : i8,
+}
+
+impl Clone for bme680_calib_data {
+    fn clone(&self) -> Self { *self }
+}
+
+#[derive(Copy)]
+#[repr(C)]
+pub struct Bme680_tph_sett {
+    pub os_hum : u8,
+    pub os_temp : u8,
+    pub os_pres : u8,
+    pub filter : u8,
+}
+
+impl Clone for bme680_tph_sett {
+    fn clone(&self) -> Self { *self }
+}
+
+#[derive(Copy)]
+#[repr(C)]
+pub struct Bme680_gas_sett {
+    pub nb_conv : u8,
+    pub heatr_ctrl : u8,
+    pub run_gas : u8,
+    pub heatr_temp : u16,
+    pub heatr_dur : u16,
+}
+
+impl Clone for Bme680_gas_sett {
+    fn clone(&self) -> Self { *self }
+}
+
+#[derive(Copy)]
+#[repr(C)]
+pub struct Bme680_field_data {
+    pub status : u8,
+    pub gas_index : u8,
+    pub meas_index : u8,
+    pub temperature : i16,
+    pub pressure : u32,
+    pub humidity : u32,
+    pub gas_resistance : u32,
+}
+
+impl Clone for Bme680_field_data {
+    fn clone(&self) -> Self { *self }
+}
+
+#[derive(Copy)]
+#[repr(C)]
+pub struct Bme680_dev<I2C, D> {
+    pub i2c: I2C,
+    pub delay: D,
+    pub chip_id : u8,
+    pub dev_id : u8,
+    pub mem_page : u8,
+    pub amb_temp : i8,
+    pub calib : Bme680_calib_data,
+    pub tph_sett : Bme680_tph_sett,
+    pub gas_sett : Bme680_gas_sett,
+    pub power_mode : PowerMode,
+    pub new_fields : u8,
+    pub info_msg : u8,
+    pub com_rslt : i8,
+}
+
+impl Clone for Bme680_dev {
+    fn clone(&self) -> Self { *self }
+}
+
+impl Bme680_dev {
+    
+pub fn init(self) -> Result<()> {
+    rslt = bme680_get_regs(
+               0xd0u8,
+               &mut (*dev).chip_id as (*mut u8),
+               1u16,
+               dev
+           );
+    if rslt as (i32) == BME680_OK {
+        if (*dev).chip_id as (i32) == 0x61i32 {
+            rslt = get_calib_data(dev);
+        } else {
+            rslt = -3i8;
+        }
+    }
+    rslt
+}
+
+
+pub fn bme680_get_regs(
+    mut reg_addr : u8,
+    mut reg_data : *mut u8,
+    mut len : u16,
+    mut dev : *mut bme680_dev
+) -> i8 {
+    let mut rslt : i8;
+    (*dev).com_rslt = ((*dev).read)(
+                          (*dev).dev_id,
+                          reg_addr,
+                          reg_data,
+                          len
+                      );
+    if (*dev).com_rslt as (i32) != 0i32 {
+        rslt = -2i8;
+    }
+    rslt
+}
+
+
+pub fn bme680_set_regs(
+    mut reg_addr : *const u8,
+    mut reg_data : *const u8,
+    mut len : u8,
+    mut dev : *mut bme680_dev
+) -> i8 {
+    let mut rslt : i8;
+    let mut tmp_buff : [u8; 40] = 0i32 as ([u8; 40]);
+    let mut index : u16;
+    rslt = null_ptr_check(dev as (*const bme680_dev));
+    if rslt as (i32) == BME680_OK {
+        if len as (i32) > 0i32 && (len as (i32) < 40i32 / 2i32) {
+            index = 0u16;
+            'loop4: loop {
+                if !(index as (i32) < len as (i32)) {
+                    break;
+                }
+                if (*dev).intf as (i32) == bme680_intf::BME680_SPI_INTF as (i32) {
+                    rslt = set_mem_page(*reg_addr.offset(index as (isize)),dev);
+                    tmp_buff[(2i32 * index as (i32)) as (usize)] = (*reg_addr.offset(
+                                                                         index as (isize)
+                                                                     ) as (i32) & 0x7fi32) as (u8);
+                } else {
+                    tmp_buff[(2i32 * index as (i32)) as (usize)] = *reg_addr.offset(
+                                                                        index as (isize)
+                                                                    );
+                }
+                tmp_buff[
+                    (2i32 * index as (i32) + 1i32) as (usize)
+                ] = *reg_data.offset(index as (isize));
+                index = (index as (i32) + 1) as (u16);
+            }
+            if rslt as (i32) == BME680_OK {
+                (*dev).com_rslt = ((*dev).write)(
+                                      (*dev).dev_id,
+                                      tmp_buff[0usize],
+                                      &mut tmp_buff[1usize] as (*mut u8),
+                                      (2i32 * len as (i32) - 1i32) as (u16)
+                                  );
+                if (*dev).com_rslt as (i32) != 0i32 {
+                    rslt = -2i8;
+                }
+            }
+        } else {
+            rslt = -4i8;
+        }
+    }
+    rslt
+}
+
+pub fn soft_reset(
+    delay: D
+) -> Result<> where
+    D: DelayMs<u8>,
+{
+    let mut rslt : i8;
+    let mut reg_addr : u8 = BME680_SOFT_RESET_ADDR;
+    let mut soft_rst_cmd : u8 = BME680_SOFT_RESET_CMD;
+    rslt = bme680_set_regs(
+               &mut reg_addr as (*mut u8) as (*const u8),
+               &mut soft_rst_cmd as (*mut u8) as (*const u8),
+               1u8,
+               dev
+           );
+    delay.delay_ms(BME680_RESET_PERIOD);
+    rslt
+}
+
+
+pub fn bme680_set_sensor_settings(
+    mut desired_settings : u16, mut dev : *mut bme680_dev
+) -> i8 {
+    let mut rslt : i8;
+    let mut reg_addr : u8;
+    let mut data : u8 = 0u8;
+    let mut count : u8 = 0u8;
+    let mut reg_array : [u8; 6] = 0i32 as ([u8; 6]);
+    let mut data_array : [u8; 6] = 0i32 as ([u8; 6]);
+    let mut intended_power_mode : u8 = (*dev).power_mode;
+    rslt = null_ptr_check(dev as (*const bme680_dev));
+    if rslt as (i32) == BME680_OK {
+        if desired_settings as (i32) & 8i32 != 0 {
+            rslt = set_gas_config(dev);
+        }
+        (*dev).power_mode = 0u8;
+        if rslt as (i32) == BME680_OK {
+            rslt = bme680_set_sensor_mode(dev);
+        }
+        if desired_settings as (i32) & 16i32 != 0 {
+            rslt = boundary_check(
+                       &mut (*dev).tph_sett.filter as (*mut u8),
+                       0u8,
+                       7u8,
+                       dev
+                   );
+            reg_addr = 0x75u8;
+            if rslt as (i32) == BME680_OK {
+                rslt = bme680_get_regs(reg_addr,&mut data as (*mut u8),1u16,dev);
+            }
+            if desired_settings as (i32) & 16i32 != 0 {
+                data = (data as (i32) & !0x1ci32 | (*dev).tph_sett.filter as (i32) << 2i32 & 0x1ci32) as (u8);
+            }
+            reg_array[count as (usize)] = reg_addr;
+            data_array[count as (usize)] = data;
+            count = (count as (i32) + 1) as (u8);
+        }
+        if desired_settings as (i32) & 32i32 != 0 {
+            rslt = boundary_check(
+                       &mut (*dev).gas_sett.heatr_ctrl as (*mut u8),
+                       0x0u8,
+                       0x8u8,
+                       dev
+                   );
+            reg_addr = 0x70u8;
+            if rslt as (i32) == BME680_OK {
+                rslt = bme680_get_regs(reg_addr,&mut data as (*mut u8),1u16,dev);
+            }
+            data = (data as (i32) & !0x8i32 | (*dev).gas_sett.heatr_ctrl as (i32) & 0x8i32) as (u8);
+            reg_array[count as (usize)] = reg_addr;
+            data_array[count as (usize)] = data;
+            count = (count as (i32) + 1) as (u8);
+        }
+        if desired_settings as (i32) & (1i32 | 2i32) != 0 {
+            rslt = boundary_check(
+                       &mut (*dev).tph_sett.os_temp as (*mut u8),
+                       0u8,
+                       5u8,
+                       dev
+                   );
+            reg_addr = 0x74u8;
+            if rslt as (i32) == BME680_OK {
+                rslt = bme680_get_regs(reg_addr,&mut data as (*mut u8),1u16,dev);
+            }
+            if desired_settings as (i32) & 1i32 != 0 {
+                data = (data as (i32) & !0xe0i32 | (*dev).tph_sett.os_temp as (i32) << 5i32 & 0xe0i32) as (u8);
+            }
+            if desired_settings as (i32) & 2i32 != 0 {
+                data = (data as (i32) & !0x1ci32 | (*dev).tph_sett.os_pres as (i32) << 2i32 & 0x1ci32) as (u8);
+            }
+            reg_array[count as (usize)] = reg_addr;
+            data_array[count as (usize)] = data;
+            count = (count as (i32) + 1) as (u8);
+        }
+        if desired_settings as (i32) & 4i32 != 0 {
+            rslt = boundary_check(
+                       &mut (*dev).tph_sett.os_hum as (*mut u8),
+                       0u8,
+                       5u8,
+                       dev
+                   );
+            reg_addr = 0x72u8;
+            if rslt as (i32) == BME680_OK {
+                rslt = bme680_get_regs(reg_addr,&mut data as (*mut u8),1u16,dev);
+            }
+            data = (data as (i32) & !0x7i32 | (*dev).tph_sett.os_hum as (i32) & 0x7i32) as (u8);
+            reg_array[count as (usize)] = reg_addr;
+            data_array[count as (usize)] = data;
+            count = (count as (i32) + 1) as (u8);
+        }
+        if desired_settings as (i32) & (64i32 | 128i32) != 0 {
+            rslt = boundary_check(
+                       &mut (*dev).gas_sett.run_gas as (*mut u8),
+                       0u8,
+                       1u8,
+                       dev
+                   );
+            if rslt as (i32) == BME680_OK {
+                rslt = boundary_check(
+                           &mut (*dev).gas_sett.nb_conv as (*mut u8),
+                           0u8,
+                           10u8,
+                           dev
+                       );
+            }
+            reg_addr = 0x71u8;
+            if rslt as (i32) == BME680_OK {
+                rslt = bme680_get_regs(reg_addr,&mut data as (*mut u8),1u16,dev);
+            }
+            if desired_settings as (i32) & 64i32 != 0 {
+                data = (data as (i32) & !0x10i32 | (*dev).gas_sett.run_gas as (i32) << 4i32 & 0x10i32) as (u8);
+            }
+            if desired_settings as (i32) & 128i32 != 0 {
+                data = (data as (i32) & !0xfi32 | (*dev).gas_sett.nb_conv as (i32) & 0xfi32) as (u8);
+            }
+            reg_array[count as (usize)] = reg_addr;
+            data_array[count as (usize)] = data;
+            count = (count as (i32) + 1) as (u8);
+        }
+        if rslt as (i32) == BME680_OK {
+            rslt = bme680_set_regs(
+                       reg_array.as_mut_ptr() as (*const u8),
+                       data_array.as_mut_ptr() as (*const u8),
+                       count,
+                       dev
+                   );
+        }
+        (*dev).power_mode = intended_power_mode;
+    }
+    rslt
+}
+
+
+pub fn bme680_get_sensor_settings(
+    mut desired_settings : u16, mut dev : *mut bme680_dev
+) -> i8 {
+    let mut rslt : i8;
+    let mut reg_addr : u8 = 0x70u8;
+    let mut data_array : [u8; 6] = 0i32 as ([u8; 6]);
+    rslt = null_ptr_check(dev as (*const bme680_dev));
+    if rslt as (i32) == BME680_OK {
+        rslt = bme680_get_regs(reg_addr,data_array.as_mut_ptr(),6u16,dev);
+        if rslt as (i32) == BME680_OK {
+            if desired_settings as (i32) & 8i32 != 0 {
+                rslt = get_gas_config(dev);
+            }
+            if desired_settings as (i32) & 16i32 != 0 {
+                (*dev).tph_sett.filter = ((data_array[
+                                               5usize
+                                           ] as (i32) & 0x1ci32) >> 2i32) as (u8);
+            }
+            if desired_settings as (i32) & (1i32 | 2i32) != 0 {
+                (*dev).tph_sett.os_temp = ((data_array[
+                                                4usize
+                                            ] as (i32) & 0xe0i32) >> 5i32) as (u8);
+                (*dev).tph_sett.os_pres = ((data_array[
+                                                4usize
+                                            ] as (i32) & 0x1ci32) >> 2i32) as (u8);
+            }
+            if desired_settings as (i32) & 4i32 != 0 {
+                (*dev).tph_sett.os_hum = (data_array[
+                                              2usize
+                                          ] as (i32) & 0x7i32) as (u8);
+            }
+            if desired_settings as (i32) & 32i32 != 0 {
+                (*dev).gas_sett.heatr_ctrl = (data_array[
+                                                  0usize
+                                              ] as (i32) & 0x8i32) as (u8);
+            }
+            if desired_settings as (i32) & (64i32 | 128i32) != 0 {
+                (*dev).gas_sett.nb_conv = (data_array[
+                                               1usize
+                                           ] as (i32) & 0xfi32) as (u8);
+                (*dev).gas_sett.run_gas = ((data_array[
+                                                1usize
+                                            ] as (i32) & 0x10i32) >> 4i32) as (u8);
+            }
+        }
+    } else {
+        rslt = -1i8;
+    }
+    rslt
+}
+
+
+pub fn bme680_set_sensor_mode(
+    mut dev : *mut bme680_dev
+) -> i8 {
+    let mut _currentBlock;
+    let mut rslt : i8;
+    let mut tmp_pow_mode : u8;
+    let mut pow_mode : u8 = 0u8;
+    let mut reg_addr : u8 = 0x74u8;
+    rslt = null_ptr_check(dev as (*const bme680_dev));
+    if rslt as (i32) == BME680_OK {
+        _currentBlock = 1;
+    } else {
+        _currentBlock = 8;
+    }
+    'loop1: loop {
+        if _currentBlock == 1 {
+            rslt = bme680_get_regs(
+                       0x74u8,
+                       &mut tmp_pow_mode as (*mut u8),
+                       1u16,
+                       dev
+                   );
+            if rslt as (i32) == BME680_OK {
+                pow_mode = (tmp_pow_mode as (i32) & 0x3i32) as (u8);
+                if pow_mode as (i32) != 0i32 {
+                    tmp_pow_mode = (tmp_pow_mode as (i32) & !0x3i32) as (u8);
+                    rslt = bme680_set_regs(
+                               &mut reg_addr as (*mut u8) as (*const u8),
+                               &mut tmp_pow_mode as (*mut u8) as (*const u8),
+                               1u8,
+                               dev
+                           );
+                    ((*dev).delay_ms)(10u32);
+                }
+            }
+            if pow_mode as (i32) != 0i32 {
+                _currentBlock = 1;
+                continue;
+            }
+            if !((*dev).power_mode as (i32) != 0i32) {
+                _currentBlock = 8;
+                continue;
+            }
+            tmp_pow_mode = (tmp_pow_mode as (i32) & !0x3i32 | (*dev).power_mode as (i32) & 0x3i32) as (u8);
+            if !(rslt as (i32) == BME680_OK) {
+                _currentBlock = 8;
+                continue;
+            }
+            rslt = bme680_set_regs(
+                       &mut reg_addr as (*mut u8) as (*const u8),
+                       &mut tmp_pow_mode as (*mut u8) as (*const u8),
+                       1u8,
+                       dev
+                   );
+            _currentBlock = 8;
+        } else {
+            return rslt;
+        }
+    }
+}
+
+
+pub fn bme680_get_sensor_mode(
+    mut dev : *mut bme680_dev
+) -> i8 {
+    let mut rslt : i8;
+    let mut mode : u8;
+    rslt = bme680_get_regs(0x74u8,&mut mode as (*mut u8),1u16,dev);
+    (*dev).power_mode = (mode as (i32) & 0x3i32) as (u8);
+    rslt
+}
+
+
+pub fn bme680_set_profile_dur(
+    mut duration : u16, mut dev : *mut bme680_dev
+) {
+    let mut tph_dur : u32;
+    let mut meas_cycles : u32;
+    let mut os_to_meas_cycles
+        : [u8; 6]
+        = [ 0u8, 1u8, 2u8, 4u8, 8u8, 16u8 ];
+    meas_cycles = os_to_meas_cycles[
+                      (*dev).tph_sett.os_temp as (usize)
+                  ] as (u32);
+    meas_cycles = meas_cycles.wrapping_add(
+                      os_to_meas_cycles[(*dev).tph_sett.os_pres as (usize)] as (u32)
+                  );
+    meas_cycles = meas_cycles.wrapping_add(
+                      os_to_meas_cycles[(*dev).tph_sett.os_hum as (usize)] as (u32)
+                  );
+    tph_dur = meas_cycles.wrapping_mul(1963u32);
+    tph_dur = tph_dur.wrapping_add(477u32.wrapping_mul(4u32));
+    tph_dur = tph_dur.wrapping_add(477u32.wrapping_mul(5u32));
+    tph_dur = tph_dur.wrapping_add(500u32);
+    tph_dur = tph_dur.wrapping_div(1000u32);
+    tph_dur = tph_dur.wrapping_add(1u32);
+    (*dev).gas_sett.heatr_dur = (duration as (i32) - tph_dur as (u16) as (i32)) as (u16);
+}
+
+
+pub fn bme680_get_profile_dur(
+    mut duration : *mut u16, mut dev : *const bme680_dev
+) {
+    let mut tph_dur : u32;
+    let mut meas_cycles : u32;
+    let mut os_to_meas_cycles
+        : [u8; 6]
+        = [ 0u8, 1u8, 2u8, 4u8, 8u8, 16u8 ];
+    meas_cycles = os_to_meas_cycles[
+                      (*dev).tph_sett.os_temp as (usize)
+                  ] as (u32);
+    meas_cycles = meas_cycles.wrapping_add(
+                      os_to_meas_cycles[(*dev).tph_sett.os_pres as (usize)] as (u32)
+                  );
+    meas_cycles = meas_cycles.wrapping_add(
+                      os_to_meas_cycles[(*dev).tph_sett.os_hum as (usize)] as (u32)
+                  );
+    tph_dur = meas_cycles.wrapping_mul(1963u32);
+    tph_dur = tph_dur.wrapping_add(477u32.wrapping_mul(4u32));
+    tph_dur = tph_dur.wrapping_add(477u32.wrapping_mul(5u32));
+    tph_dur = tph_dur.wrapping_add(500u32);
+    tph_dur = tph_dur.wrapping_div(1000u32);
+    tph_dur = tph_dur.wrapping_add(1u32);
+    *duration = tph_dur as (u16);
+    if (*dev).gas_sett.run_gas != 0 {
+        *duration = (*duration as (i32) + (*dev).gas_sett.heatr_dur as (i32)) as (u16);
+    }
+}
+
+pub fn bme680_get_sensor_data(
+    mut data : *mut bme680_field_data, mut dev : *mut bme680_dev
+) -> i8 {
+    let mut rslt : i8;
+    rslt = read_field_data(data,dev);
+    if rslt as (i32) == BME680_OK {
+        if (*data).status as (i32) & 0x80i32 != 0 {
+            (*dev).new_fields = 1u8;
+        } else {
+            (*dev).new_fields = 0u8;
+        }
+    }
+    rslt
+}
+
+fn get_calib_data(mut dev : *mut bme680_dev) -> i8 {
+    let mut rslt : i8;
+    let mut coeff_array : [u8; 41] = 0i32 as ([u8; 41]);
+    let mut temp_var : u8 = 0u8;
+        rslt = bme680_get_regs(0x89u8,coeff_array.as_mut_ptr(),25u16,dev);
+        if rslt as (i32) == BME680_OK {
+            rslt = bme680_get_regs(
+                       0xe1u8,
+                       &mut coeff_array[25usize] as (*mut u8),
+                       16u16,
+                       dev
+                   );
+        }
+        (*dev).calib.par_t1 = (coeff_array[
+                                   34usize
+                               ] as (u16) as (i32) << 8i32 | coeff_array[
+                                                                 33usize
+                                                             ] as (u16) as (i32)) as (u16);
+        (*dev).calib.par_t2 = (coeff_array[
+                                   2usize
+                               ] as (u16) as (i32) << 8i32 | coeff_array[
+                                                                 1usize
+                                                             ] as (u16) as (i32)) as (i16);
+        (*dev).calib.par_t3 = coeff_array[3usize] as (i8);
+        (*dev).calib.par_p1 = (coeff_array[
+                                   6usize
+                               ] as (u16) as (i32) << 8i32 | coeff_array[
+                                                                 5usize
+                                                             ] as (u16) as (i32)) as (u16);
+        (*dev).calib.par_p2 = (coeff_array[
+                                   8usize
+                               ] as (u16) as (i32) << 8i32 | coeff_array[
+                                                                 7usize
+                                                             ] as (u16) as (i32)) as (i16);
+        (*dev).calib.par_p3 = coeff_array[9usize] as (i8);
+        (*dev).calib.par_p4 = (coeff_array[
+                                   12usize
+                               ] as (u16) as (i32) << 8i32 | coeff_array[
+                                                                 11usize
+                                                             ] as (u16) as (i32)) as (i16);
+        (*dev).calib.par_p5 = (coeff_array[
+                                   14usize
+                               ] as (u16) as (i32) << 8i32 | coeff_array[
+                                                                 13usize
+                                                             ] as (u16) as (i32)) as (i16);
+        (*dev).calib.par_p6 = coeff_array[16usize] as (i8);
+        (*dev).calib.par_p7 = coeff_array[15usize] as (i8);
+        (*dev).calib.par_p8 = (coeff_array[
+                                   20usize
+                               ] as (u16) as (i32) << 8i32 | coeff_array[
+                                                                 19usize
+                                                             ] as (u16) as (i32)) as (i16);
+        (*dev).calib.par_p9 = (coeff_array[
+                                   22usize
+                               ] as (u16) as (i32) << 8i32 | coeff_array[
+                                                                 21usize
+                                                             ] as (u16) as (i32)) as (i16);
+        (*dev).calib.par_p10 = coeff_array[23usize];
+        (*dev).calib.par_h1 = (coeff_array[
+                                   27usize
+                               ] as (u16) as (i32) << 4i32 | coeff_array[
+                                                                 26usize
+                                                             ] as (i32) & 0xfi32) as (u16);
+        (*dev).calib.par_h2 = (coeff_array[
+                                   25usize
+                               ] as (u16) as (i32) << 4i32 | coeff_array[
+                                                                 26usize
+                                                             ] as (i32) >> 4i32) as (u16);
+        (*dev).calib.par_h3 = coeff_array[28usize] as (i8);
+        (*dev).calib.par_h4 = coeff_array[29usize] as (i8);
+        (*dev).calib.par_h5 = coeff_array[30usize] as (i8);
+        (*dev).calib.par_h6 = coeff_array[31usize];
+        (*dev).calib.par_h7 = coeff_array[32usize] as (i8);
+        (*dev).calib.par_gh1 = coeff_array[37usize] as (i8);
+        (*dev).calib.par_gh2 = (coeff_array[
+                                    36usize
+                                ] as (u16) as (i32) << 8i32 | coeff_array[
+                                                                  35usize
+                                                              ] as (u16) as (i32)) as (i16);
+        (*dev).calib.par_gh3 = coeff_array[38usize] as (i8);
+        if rslt as (i32) == BME680_OK {
+            rslt = bme680_get_regs(0x2u8,&mut temp_var as (*mut u8),1u16,dev);
+            (*dev).calib.res_heat_range = ((temp_var as (i32) & 0x30i32) / 16i32) as (u8);
+            if rslt as (i32) == BME680_OK {
+                rslt = bme680_get_regs(0x0u8,&mut temp_var as (*mut u8),1u16,dev);
+                (*dev).calib.res_heat_val = temp_var as (i8);
+                if rslt as (i32) == BME680_OK {
+                    rslt = bme680_get_regs(0x4u8,&mut temp_var as (*mut u8),1u16,dev);
+                }
+            }
+        }
+        (*dev).calib.range_sw_err = ((temp_var as (i8) as (i32) & 0xf0i32) / 16i32) as (i8);
+    rslt
+}
+
+fn set_gas_config(self) -> i8 {
+    let mut rslt : i8;
+        let mut reg_addr : [u8; 2] = 0i32 as ([u8; 2]);
+        let mut reg_data : [u8; 2] = 0i32 as ([u8; 2]);
+        if (*dev).power_mode as (i32) == 1i32 {
+            reg_addr[0usize] = 0x5au8;
+            reg_data[0usize] = calc_heater_res(
+                                   (*dev).gas_sett.heatr_temp,
+                                   dev as (*const bme680_dev)
+                               );
+            reg_addr[1usize] = 0x64u8;
+            reg_data[1usize] = calc_heater_dur((*dev).gas_sett.heatr_dur);
+            (*dev).gas_sett.nb_conv = 0u8;
+        } else {
+            rslt = 1i8;
+        }
+        if rslt as (i32) == BME680_OK {
+            rslt = bme680_set_regs(
+                       reg_addr.as_mut_ptr() as (*const u8),
+                       reg_data.as_mut_ptr() as (*const u8),
+                       2u8,
+                       dev
+                   );
+        }
+    rslt
+}
+
+fn get_gas_config(self) -> i8 {
+    let mut rslt : i8;
+    let mut reg_addr1 : u8 = 0x5au8;
+    let mut reg_addr2 : u8 = 0x64u8;
+    let mut reg_data : u8 = 0u8;
+    rslt = bme680_get_regs(
+               reg_addr1,
+               &mut reg_data as (*mut u8),
+               1u16,
+               dev
+           );
+        (*dev).gas_sett.heatr_temp = reg_data as (u16);
+        rslt = bme680_get_regs(
+                   reg_addr2,
+                   &mut reg_data as (*mut u8),
+                   1u16,
+                   dev
+               );
+        if rslt as (i32) == BME680_OK {
+            (*dev).gas_sett.heatr_dur = reg_data as (u16);
+        }
+    rslt
+}
+
+fn calc_heater_res(
+    mut temp : u16, mut dev : *const bme680_dev
+) -> u8 {
+    let mut heatr_res : u8;
+    let mut var1 : i32;
+    let mut var2 : i32;
+    let mut var3 : i32;
+    let mut var4 : i32;
+    let mut var5 : i32;
+    let mut heatr_res_x100 : i32;
+    if temp as (i32) > 400i32 {
+        temp = 400u16;
+    }
+    var1 = (*dev).amb_temp as (i32) * (*dev).calib.par_gh3 as (i32) / 1000i32 * 256i32;
+    var2 = ((*dev).calib.par_gh1 as (i32) + 784i32) * ((((*dev).calib.par_gh2 as (i32) + 154009i32) * temp as (i32) * 5i32 / 100i32 + 3276800i32) / 10i32);
+    var3 = var1 + var2 / 2i32;
+    var4 = var3 / ((*dev).calib.res_heat_range as (i32) + 4i32);
+    var5 = 131i32 * (*dev).calib.res_heat_val as (i32) + 65536i32;
+    heatr_res_x100 = (var4 / var5 - 250i32) * 34i32;
+    heatr_res = ((heatr_res_x100 + 50i32) / 100i32) as (u8);
+    heatr_res
+}
+
+fn calc_heater_dur(mut dur : u16) -> u8 {
+    let mut factor : u8 = 0u8;
+    let mut durval : u8;
+    if dur as (i32) >= 0xfc0i32 {
+        durval = 0xffu8;
+    } else {
+        'loop1: loop {
+            if !(dur as (i32) > 0x3fi32) {
+                break;
+            }
+            dur = (dur as (i32) / 4i32) as (u16);
+            factor = (factor as (i32) + 1i32) as (u8);
+        }
+        durval = (dur as (i32) + factor as (i32) * 64i32) as (u8);
+    }
+    durval
+}
+
+fn calc_temperature(
+    mut temp_adc : u32, mut dev : *mut bme680_dev
+) -> i16 {
+    let mut var1 : isize;
+    let mut var2 : isize;
+    let mut var3 : isize;
+    let mut calc_temp : i16;
+    var1 = ((temp_adc as (i32) >> 3i32) - ((*dev).calib.par_t1 as (i32) << 1i32)) as (isize);
+    var2 = var1 * (*dev).calib.par_t2 as (i32) as (isize) >> 11i32;
+    var3 = (var1 >> 1i32) * (var1 >> 1i32) >> 12i32;
+    var3 = var3 * ((*dev).calib.par_t3 as (i32) << 4i32) as (isize) >> 14i32;
+    (*dev).calib.t_fine = (var2 + var3) as (i32);
+    calc_temp = ((*dev).calib.t_fine * 5i32 + 128i32 >> 8i32) as (i16);
+    calc_temp
+}
+
+fn calc_pressure(
+    mut pres_adc : u32, mut dev : *const bme680_dev
+) -> u32 {
+    let mut var1 : i32 = 0i32;
+    let mut var2 : i32 = 0i32;
+    let mut var3 : i32 = 0i32;
+    let mut pressure_comp : i32 = 0i32;
+    var1 = ((*dev).calib.t_fine >> 1i32) - 64000i32;
+    var2 = ((var1 >> 2i32) * (var1 >> 2i32) >> 11i32) * (*dev).calib.par_p6 as (i32) >> 2i32;
+    var2 = var2 + (var1 * (*dev).calib.par_p5 as (i32) << 1i32);
+    var2 = (var2 >> 2i32) + ((*dev).calib.par_p4 as (i32) << 16i32);
+    var1 = (((var1 >> 2i32) * (var1 >> 2i32) >> 13i32) * ((*dev).calib.par_p3 as (i32) << 5i32) >> 3i32) + ((*dev).calib.par_p2 as (i32) * var1 >> 1i32);
+    var1 = var1 >> 18i32;
+    var1 = (32768i32 + var1) * (*dev).calib.par_p1 as (i32) >> 15i32;
+    pressure_comp = 1048576u32.wrapping_sub(pres_adc) as (i32);
+    pressure_comp = ((pressure_comp - (var2 >> 12i32)) as (u32)).wrapping_mul(
+                        3125u32
+                    ) as (i32);
+    if pressure_comp >= 0x40000000i32 {
+        pressure_comp = ((pressure_comp as (u32)).wrapping_div(
+                             var1 as (u32)
+                         ) << 1i32) as (i32);
+    } else {
+        pressure_comp = ((pressure_comp << 1i32) as (u32)).wrapping_div(
+                            var1 as (u32)
+                        ) as (i32);
+    }
+    var1 = (*dev).calib.par_p9 as (i32) * ((pressure_comp >> 3i32) * (pressure_comp >> 3i32) >> 13i32) >> 12i32;
+    var2 = (pressure_comp >> 2i32) * (*dev).calib.par_p8 as (i32) >> 13i32;
+    var3 = (pressure_comp >> 8i32) * (pressure_comp >> 8i32) * (pressure_comp >> 8i32) * (*dev).calib.par_p10 as (i32) >> 17i32;
+    pressure_comp = pressure_comp + (var1 + var2 + var3 + ((*dev).calib.par_p7 as (i32) << 7i32) >> 4i32);
+    pressure_comp as (u32)
+}
+
+fn calc_humidity(
+    mut hum_adc : u16, mut dev : *const bme680_dev
+) -> u32 {
+    let mut var1 : i32;
+    let mut var2 : i32;
+    let mut var3 : i32;
+    let mut var4 : i32;
+    let mut var5 : i32;
+    let mut var6 : i32;
+    let mut temp_scaled : i32;
+    let mut calc_hum : i32;
+    temp_scaled = (*dev).calib.t_fine * 5i32 + 128i32 >> 8i32;
+    var1 = hum_adc as (i32) - (*dev).calib.par_h1 as (i32) * 16i32 - (temp_scaled * (*dev).calib.par_h3 as (i32) / 100i32 >> 1i32);
+    var2 = (*dev).calib.par_h2 as (i32) * (temp_scaled * (*dev).calib.par_h4 as (i32) / 100i32 + (temp_scaled * (temp_scaled * (*dev).calib.par_h5 as (i32) / 100i32) >> 6i32) / 100i32 + (1i32 << 14i32)) >> 10i32;
+    var3 = var1 * var2;
+    var4 = (*dev).calib.par_h6 as (i32) << 7i32;
+    var4 = var4 + temp_scaled * (*dev).calib.par_h7 as (i32) / 100i32 >> 4i32;
+    var5 = (var3 >> 14i32) * (var3 >> 14i32) >> 10i32;
+    var6 = var4 * var5 >> 1i32;
+    calc_hum = (var3 + var6 >> 10i32) * 1000i32 >> 12i32;
+    if calc_hum > 100000i32 {
+        calc_hum = 100000i32;
+    } else if calc_hum < 0i32 {
+        calc_hum = 0i32;
+    }
+    calc_hum as (u32)
+}
+
+fn calc_gas_resistance(
+    mut gas_res_adc : u16,
+    mut gas_range : u8,
+    mut dev : *const bme680_dev
+) -> u32 {
+    let mut var1 : isize;
+    let mut var2 : usize;
+    let mut var3 : isize;
+    let mut calc_gas_res : u32;
+    let mut lookupTable1
+        : [u32; 16]
+        = [   2147483647u32,
+              2147483647u32,
+              2147483647u32,
+              2147483647u32,
+              2147483647u32,
+              2126008810u32,
+              2147483647u32,
+              2130303777u32,
+              2147483647u32,
+              2147483647u32,
+              2143188679u32,
+              2136746228u32,
+              2147483647u32,
+              2126008810u32,
+              2147483647u32,
+              2147483647u32
+          ];
+    let mut lookupTable2
+        : [u32; 16]
+        = [   4096000000u32,
+              2048000000u32,
+              1024000000u32,
+              512000000u32,
+              255744255u32,
+              127110228u32,
+              64000000u32,
+              32258064u32,
+              16016016u32,
+              8000000u32,
+              4000000u32,
+              2000000u32,
+              1000000u32,
+              500000u32,
+              250000u32,
+              125000u32
+          ];
+    var1 = (1340isize + 5isize * (*dev).calib.range_sw_err as (isize)) * lookupTable1[
+                                                                             gas_range as (usize)
+                                                                         ] as (isize) >> 16i32;
+    var2 = ((gas_res_adc as (isize) << 15i32) - 16777216isize + var1) as (usize);
+    var3 = lookupTable2[
+               gas_range as (usize)
+           ] as (isize) * var1 >> 9i32;
+    calc_gas_res = ((var3 + (var2 as (isize) >> 1i32)) / var2 as (isize)) as (u32);
+    calc_gas_res
+}
+
+fn read_field_data(
+    mut data : *mut bme680_field_data, mut dev : *mut bme680_dev
+) -> i8 {
+    let mut _currentBlock;
+    let mut rslt : i8;
+    let mut buff : [u8; 15] = 0i32 as ([u8; 15]);
+    let mut gas_range : u8;
+    let mut adc_temp : u32;
+    let mut adc_pres : u32;
+    let mut adc_hum : u16;
+    let mut adc_gas_res : u16;
+    let mut tries : u8 = 10u8;
+    rslt = null_ptr_check(dev as (*const bme680_dev));
+    'loop1: loop {
+        if rslt as (i32) == BME680_OK {
+            rslt = bme680_get_regs(0x1du8,buff.as_mut_ptr(),15u16,dev);
+            (*data).status = (buff[0usize] as (i32) & 0x80i32) as (u8);
+            (*data).gas_index = (buff[0usize] as (i32) & 0xfi32) as (u8);
+            (*data).meas_index = buff[1usize];
+            adc_pres = (buff[2usize] as (u32)).wrapping_mul(4096u32) | (buff[
+                                                                            3usize
+                                                                        ] as (u32)).wrapping_mul(
+                                                                           16u32
+                                                                       ) | (buff[
+                                                                                4usize
+                                                                            ] as (u32)).wrapping_div(
+                                                                               16u32
+                                                                           );
+            adc_temp = (buff[5usize] as (u32)).wrapping_mul(4096u32) | (buff[
+                                                                            6usize
+                                                                        ] as (u32)).wrapping_mul(
+                                                                           16u32
+                                                                       ) | (buff[
+                                                                                7usize
+                                                                            ] as (u32)).wrapping_div(
+                                                                               16u32
+                                                                           );
+            adc_hum = ((buff[8usize] as (u32)).wrapping_mul(256u32) | buff[
+                                                                          9usize
+                                                                      ] as (u32)) as (u16);
+            adc_gas_res = ((buff[13usize] as (u32)).wrapping_mul(4u32) | (buff[
+                                                                              14usize
+                                                                          ] as (u32)).wrapping_div(
+                                                                             64u32
+                                                                         )) as (u16);
+            gas_range = (buff[14usize] as (i32) & 0xfi32) as (u8);
+            (*data).status = ((*data).status as (i32) | buff[
+                                                            14usize
+                                                        ] as (i32) & 0x20i32) as (u8);
+            (*data).status = ((*data).status as (i32) | buff[
+                                                            14usize
+                                                        ] as (i32) & 0x10i32) as (u8);
+            if (*data).status as (i32) & 0x80i32 != 0 {
+                _currentBlock = 6;
+                break;
+            }
+            ((*dev).delay_ms)(10u32);
+        }
+        tries = (tries as (i32) - 1) as (u8);
+        if tries == 0 {
+            _currentBlock = 7;
+            break;
+        }
+    }
+    if _currentBlock == 6 {
+        (*data).temperature = calc_temperature(adc_temp,dev);
+        (*data).pressure = calc_pressure(
+                               adc_pres,
+                               dev as (*const bme680_dev)
+                           );
+        (*data).humidity = calc_humidity(
+                               adc_hum,
+                               dev as (*const bme680_dev)
+                           );
+        (*data).gas_resistance = calc_gas_resistance(
+                                     adc_gas_res,
+                                     gas_range,
+                                     dev as (*const bme680_dev)
+                                 );
+    }
+    if tries == 0 {
+        rslt = 2i8;
+    }
+    rslt
+}
+
+fn boundary_check(
+    mut value : *mut u8,
+    mut min : u8,
+    mut max : u8,
+    mut dev : *mut bme680_dev
+) -> i8 {
+    let mut rslt : i8 = 0i8;
+    if value != 0i32 as (*mut ::std::os::raw::c_void) as (*mut u8) {
+        if *value as (i32) < min as (i32) {
+            *value = min;
+            (*dev).info_msg = ((*dev).info_msg as (i32) | 1i32) as (u8);
+        }
+        if *value as (i32) > max as (i32) {
+            *value = max;
+            (*dev).info_msg = ((*dev).info_msg as (i32) | 2i32) as (u8);
+        }
+    } else {
+        rslt = -1i8;
+    }
+    rslt
+}
+
+}
diff --git a/src/device_builder.rs b/src/device_builder.rs
index 774477f..795e154 100644
--- a/src/device_builder.rs
+++ b/src/device_builder.rs
@@ -1,3 +1,6 @@
+use hal::blocking::delay::DelayMs;
+use hal::blocking::i2c::{Read, Write, WriteRead};
+
 use consts;
 use {to_result, PowerMode, Result, SensorSettings, bme680_calib_data, bme680_dev,
      bme680_field_data, bme680_gas_sett, bme680_get_profile_dur, bme680_get_regs,
@@ -263,7 +266,7 @@ impl Default for bme680_tph_sett {
     }
 }
 
-pub struct Bme680DeviceBuilder {
+pub struct Bme680DeviceBuilder<I2C, D> {
     dev: bme680_dev,
 }
 
@@ -279,8 +282,11 @@ type ComFn = extern "C" fn(dev_id: u8, reg_addr: u8, data: *mut u8, len: u16) ->
 
 type DelayFn = extern "C" fn(period: u32);
 
-impl Bme680DeviceBuilder {
-    pub fn new(read: ComFn, write: ComFn, delay_ms: DelayFn) -> Self {
+impl<I2C, D, E> Bme680DeviceBuilder<I2C, D> where
+    I2C: Read<Error = E> + Write<Error = E> + WriteRead<Error = E>,
+    D: DelayMs<u8>,
+{
+    pub fn new(i2c: I2C, delay: D) -> Self {
         let dev = bme680_dev {
             /// Chip Id
             chip_id: consts::BME680_CHIP_ID,
@@ -304,12 +310,21 @@ impl Bme680DeviceBuilder {
             new_fields: Default::default(),
             /// Store the info messages
             info_msg: Default::default(),
+
+            fn read(
+                &mut self, 
+                address: u8, 
+                buffer: &mut [u8]
+            ) -> Result<(), Self::Error>;
+
+            extern "C" fn ( dev_id : u8 , reg_addr : u8 , data : * mut u8 , len : u16 ) -> i8
+
             /// Bus read function pointer
             read: Some(read),
             /// Bus write function pointer
             write: Some(write),
             /// delay function pointer
-            delay_ms: Some(delay_ms),
+            delay_ms: Some(delay.delay_ms),
             /// Communication function result
             com_rslt: Default::default(),
         };
diff --git a/src/lib.rs b/src/lib.rs
index c3ff53b..cf2c920 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -7,8 +7,11 @@ include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
 
 #[macro_use]
 extern crate bitflags;
+extern crate embedded_hal as hal;
 
 use std::result;
+use hal::blocking::delay::{DelayMs, DelayUs};
+use hal::blocking::i2c::{Read, Write, WriteRead};
 
 #[link(name = "example", kind = "static")]
 mod consts;