![]() The Arduino board functions perfectly as a modbus slave when connected to the pc via an ftdi board, however for some reason cannot be programmed by the ftdi board, producing errors. They failed to communicate, and I found the following results by doing further testing. I was attempting to connect the Arduino Modbus slave to the ZigBee to rs232 converter. I'm using an Arduino board, programmed as a Modbus slave device, and a ZigBee to rs232 converter from SHJ electronics. I've already tried that, always using 8N1, but just can't find the source of this problem. ![]() I've searched the internet for the cause of this problem and the best I've been able to find is "check the baud rate". (FTDI High Logic Level was 0, while Prolific High Logic Level was 1). The signals from the FTDI were reversed from that of the prolific and the ZigBee. Doing logic level analysis it turns out the baud rate of the prolific converter was about 9259, not 9600. ![]()
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