![]() I've also tried using double quotes as mentioned in the comments Serial.write("AA BB 03 01 01 EE") Serial.println('AA BB 03 01 01 EE', HEX) Serial.begin(9600) // opens serial port, sets data rate to 9600 bps How would I send the equivalent string from an arduino? (I feel confident the arduino is wired correctly since I can see incoming uart data) The device is expecting a hex string like AA BB 03 01 03 EE I have a RS232 device that I am able to communicate with using RealTerm on a windows PC. ![]()
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