Data transfer (RX-TX) Arduino UNO to OpenCM9.04

[danaishrathore]

@StefanL38

I was explaining this not detailed enough.
The IO-pin of an Arduino-Uno "sends" out 5V but the serial interface-IO-pins of the OpenCM is build for only 3.3V.
This means the Arduino TX-pin "feeds" a too high voltage into the OpenCM-Rx pin and this might have damaged the OpenCM

Again thanks for detailed explanation, I got it completely now.

@StefanL38

The microocntroller-world is not superstandardised like USB-devices.
In the micrcontroller-world you yourself have to take care of a lot of more things than "does the plug fit into the socket?"

Yes, I am not good at Electronics, I have to learn a lot.