Electrodragon relay board firmware using visual studio code and platformio development environment.
This code works for the relay boards at ElectroDragon. So far I have used it on https://www.electrodragon.com/product/wifi-iot-relay-board-vdc-based-esp8266/ and https://www.electrodragon.com/product/wifi-iot-relay-board-spdt-based-esp8266/
it uses code copied from https://github.com/SensorsIot/Internet-of-Things-with-ESP8266 with several modifications.