![]() For a better understanding of the hardware and introduction, please refer to Part 1. Part 2 will cover Modbus TCP and RTU implementations using Android Things and the Industrial HAT board for Raspberry Pi 3. ![]() At that time I did it by reading the specs and writing everything in Ladder Logic. I have quite some interest in Modbus from long time ago, the first time I learn about Modbus was back in the day when I was working for an automation company, It happens that my boss wanted to have the EIA-232 port of an Allen Bradley SLC500 to have Modbus communications, the idea was to control a LED matrix display that operates using Modbus ASCII, it was for an automation fair and part of my initial training. If you are not familiar with Modbus protocol, I suggest the technical documentation here as the right place to start. Here you can find the Modbus implementation and further details. This is the continuation work on the Industrial IoT Gateway project using Android Things.
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