Introduction

This project is ported from:

1. ESP8266 RTOS SDK modbus tcp-slave example.
2. modbus_rtu2tcp

Adapted Hardware:

https://github.com/meijie-jesse/Spark-ESP8266-Smart-Device

TODO List

1. restruct code.
2. Integrate WebServer for configuration.
3. Configure Slave Id in AP mode, then broadcast configured slave Id in mDNS. slave ID has can be replaced by IP in tcp modbus.
4. FOTA