About using bidirectionnal Modbus TCP communication with the latest Etehernet Shields V2.
Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.
Step 1: Comparisons and Settings
It's been many years I use the famous and unexpensive Ethernet shield for Arduino based on W5100. It works fine but the latest shields are faster and low energy consumers. I recently bought 2 type of Ethernet Shield V2:
-the SEEEDUINO (25 EUROS) based on the W5200 and runnig with Ethernet_Shield_W5200 library
-the official Arduino Ethernet Shield V2.0 (30 EUROS) based on the W5500 and running with Ethernet2-1.0.4 library
To establish a good Modbus TCP communication, you need to use the famous "mudbus" library and modify it easily as indicated in the tutorial.
Then the sketch are a little different between these 2 shields but it works fine.
AdvancedHMI can check the communication.
nota: I have got some definition problems with the pdf tutorial and I don't know why. Now it's solved. I give you an Office file.
Step 2: Conclusion
Thanx to all website advised in my tutorial.