ARDUINO, Modbus, RS485 Module TTL, PyroMiniBus

Hi All,

I need to read information from temperature sensor, so here is what I have:

  1. PyroMiniBus LINK
  2. RS485 Module TTL LINK
  3. ARDUINO LINK

I would like to connect the sensor over Modbus and get the readings on ARDUINO.

I am new to ARDUINO, I have done some research, I tried different sketches but no luck. None of them were working. I tried this way: LINK and this way: LINK. I don't even know if I have the hardware connected properly as there is few different ways to do this.

All help will be much appreciated.

Best regards
Pawel

I have the impression this is a cross-post of this.

I tried different sketches but no luck.

Why didn't you post the one you think was best? We won't do the programming for you! We are here to help not as a free programming service.

I tried this way: LINK

That link will not work.

I don't even know if I have the hardware connected properly as there is few different ways to do this.

And why didn't you post a wiring diagram of your setup to let us check if you did it correctly? Did you really read the sticky post at the top of the topic (How to use this forum)?