1. Raspberry Pi Arduino Serial Gpio

Raspberry Pi Arduino Serial Gpio

Lefty,Thanks for the reply. Install microsoft practices spg ajaxsupport dll file online. I already tried all sorts of combinations with write & print/println, none seem to work:-( If I test it manually, I need to press after the test string @00TS123443. so println sounds the correct method of sending the string?I find it a bit odd, because a normal terminal session works. Could it be the rare serial settings like 9600, 7E2?ps: The PLC doesn't respond if you don't enter a correct command. Maybe the string isn't beeing sent like I expect, but how to check this.ps2: I also notice that the 'communication' light on the PLC doesn't lit when sending data with the arduino but when using the terminal session it does!Regards,Andy.