高度计BME280的驱动程序，能够较为准确的得出相对于海平面的高度。-Altimeter BME280 driver, and can be more accurate relative sea level height are obtained.

ESP8266 IOT for ETT IOT board, delveloped using Arduino.

由于stm32的硬件iic的BUG比较多，采用模拟iic的方式读取bme280模块的数据，IIC模拟时序和BME280都写好了,只需要对输入输出引脚进行修改即可，数据通过串口打印输出，方便移植。(Because there are many bugs in STM32's hardware IIC, the data of bme280 module is read in the way of analog IIC. The IIC analog timing and bme280 are wr