GAHE GHDS100E Energy Meter is equipped with RS485 Communication. Readings are retrieved by ESP8266 (Wemos Mini) running Modbus RTU library, then send the data directly to Thingspeak every 15 seconds.
Estación Meteorológica La Gruta Wifi con Wemos D1 Mini ubicada a 774 m SNM en Antonio E. Aguero y Cerro de la Cruz, Juana Koslay (San Luis), Argentina