This App demonstrate Nucleo_F411RE connecting to ESP01 (ESP8266) through UART and get enviroment data by BME280 over I2C bus. the unit send the data to ThingSpeak cloud and persent it by three chatrs.
the connection wireing is as below pic.
Need to add float option in linker on project settings with sprintf() function.
the TingSpeak charts:
On Logic Analayzer scope it seems like below:
