You want to monitor values of a PLC, controller, OPC, HMI or SCADA that is Master Modbus RTU and write in spreadsheets from Google (Google Docs), In this case we will monitor the value of potentiometer V0 PLC from 0 to 100%: Potentiometer V0 (0-1000 SCALE 0 -100%)     Architecture ESP8266 Connection Script and … Continue reading PLC Connection Fpx C14 Panasonic and Google spreadsheets (Google docs) with ESP8266