Notes About Working with Various Arduino & Netduino Microcontroller Boards

Sunday, June 17, 2012

Arduino Leonardo & RS232 Shield

The RS232 shield for Arduino that I got from CuteDigi covers the new stand-alone SDA and SCL pins on the Arduino Leonardo. 

To work around this problem, I attached a couple preformed jumper wires to these pins on the Leonardo. These preformed wires are low enough in profile that the RS232 shield still seats completely.  The section of the shield board above these pins is blank, so there is no danger of a short circuit.

After some further research, I have also found that pins D2 and D3 on the Leonardo correspond to SDA and SCL. So, there are a couple ways to avoid the problem of the obstructed SDA and SCL pins when using the RS232 Arduino shield on the Leonardo.

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