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• Hi Jennie, I checked and confirmed that the RS485 cable from Pi Terminal to sensor is property connected by using multimeter. The photos(Image) (Image) show how I connected.

  in Please guide me for Pi Terminal 7" - RS485 sensors Comment by mshettha April 28
• Hi Jennie, I have tried to share common ground among Pi Terminal RS485 Port with the ground sensor. But I still can not read data from sensor using Modbus-Read node on Note-RED. .(Image)

  in Please guide me for Pi Terminal 7" - RS485 sensors Comment by mshettha April 19
• sorry, I forgot to mentioned sensor. Please find details sensor information from this link. https://www.sumtech.co.th/product-detail.html?pd_code=TH-031

  in Please guide me for Pi Terminal 7" - RS485 sensors Comment by mshettha April 13
• Hi Jennie, I connected Pi Terminal to sensor via RS485 port. (Image) On Node-RED flow I use Modbus-Read node then output to debug "sensor 2". But there is no debug output. Inside Modbus-Read node I configured to read holding registers a…

  in Please guide me for Pi Terminal 7" - RS485 sensors Comment by mshettha April 13