ESP32 Firmware for V2.0 Hardware

[MaxBaex]

Design and implement the firmware for the ESP32 communication module.

• Decide for Wifi or Bluetooth as the used wireless communication interface

• Provide a configuration option for a unique Bluetooth / Wifi name, baudrates.

• All data received on U1 (from the STM32) shall be transmitted parallel via Wifi and U2 (RS232 converter)

• Idea: There could be a bridge between the RJ45(RS232) and the Wifi/BT interface. E.g. to bridge data from a Flarm to a connected smartphone.

• Later and ambitious: The STM32 could be flashed from the ESP32 via UART.

• https://github.com/larus-breeze/hw_sensor/blob/master/design/uart_bluetooth_rs232_wiring_concept.png

• https://github.com/larus-breeze/hw_sensor/blob/master/media/v2.0_schematic.pdf

[MaxBaex]

basic implementation finished. Open points in issue #13