Reading Digital value from RS485 socket

[ninad110]

As a beginner in Revolution Pi Connect S, I am working on a project where I need to read a digital value of temperature sensor module connected to digital converter, with converter connected to RS485 socket of Rev Pi using Node-Red
Photo of the same is attached for your reference

[dirk]

Hello ninad110, that looks exciting. I think to use the RS485 interface via Node-RED you first need access here. See release notes Bookworm 12/2024:

Code: Select all

sudo adduser nodered dialout

[ninad110]

Thank you for your input but I think I need more guidance, for communicating a digital input device to RS485 and reading the data in Node-red.
Also I had troubles in assigning the servers in some Nodes (Modbus Read)

[dirk]

Hello ninad110, my friend, I would divide the problem into 2 parts:

1. bring RS 485 Modbus communication to the sensor into the process image:
You can do this with the videos and tutorials available here:
https://revolutionpi.com/documentation/ ... tu-master/
https://www.youtube.com/watch?v=gaJ6-D4 ... u&index=14

2. access and visualize this data via Node-RED:
https://revolutionpi.com/documentation/ ... /node-red/