The IOT2020 gateway is compatible with most Arduino sketches that can be uploaded directly from the Arduino IDE. Many other programs can be compiled and or run under Yocto Linux on the used controller X1000 SOC (X86). Third-party hardware such as PLCs and sensors from various different brands can be integrated via Ethernet or Serial (via USB adapter) using many available and open protocols including Modbus, Profinet, REST or MQTT
The IOT2020 is also compatible with Arduino shields and various programming languages, including high-level languages such as Java, C++ and Python via a range of IDEs that includes Eclipse and compilers for Yocto Linux. It is also expandable via an on-board mPCIe port. Node-Red, MQTT and SQLITE3 can also be used to connect and control local and remote peripherals, such as sensors on a device.
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Have you considered this as an option https://uk.rs-online.com/web/p/plc-i-o-modules/1354133/
I have not used the Arduino Sketch Modbus library you mentioned, in my testing I used a Modbus Module within Node-Red, I found this far more useful and you get all the benefits of Node-Red as well. Is...
I think that something like the Logo power supply would be more than sufficient. I've put a link top right to a couple of options
You can indeed use this with the IOT2020. You have many choices in how you do this
1. simply plug in the Mega via the USB port and send commands via the tty???? port of the IOT2020 to the Arduino....
To possibly help in the shorter term, I has also produced this video that shows SPI being used on the IOT2020
Especially for educational purposes it is required to have an easy-to-get-started solution. I just found a training board especially made for the educational sector on Kaftan Media. Looks really exciting...
Are you looking for a LCD display for your IOT2020 project? Here is some useful information to get one done. Select your preferred variant.
In this article I will show you how to program an IOT2000 with Arduino IDE!
The Hitachi type LCD displays are used in many designs. They work with an Arduino sketch on the IOT2020. If you're building a C++ project, this driver class can help.
Serial communication between the SimaticIOT2020 and a (not so) random micro-controller.
Control an I2C Digital to Analog converter with C++ on IOT202. Generate a sinus signal from stored samples. IC: DAC8571
How to remote debug an IOT2020 C++ program with Eclipse Neon. Work-around for the standard CDT and GDB combination that has reported issues with this combination.