Function shut generate Xor Checksum over 4 variables

[Steve-Mcl]

This post should put you on the right track...

Have writing to a usb to RS-485 adapter working but how do I read back the response?

Hey something else i wrote The value at the end of your strings and buffer examples look to be simple 8bit XOR BCC of everything proceeding it. BCC calculation... [{"id":"51480b90.640c84","type":"inject","z":"40758d1c.696554","name":"fake mqtt Set to end of line mode","topic":"","payload":"0201 0141 4000 0841 1E90 0000 0000 8203 45","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":390,"y":520,"wires":[["471f1a31.2f05d4"]]},{"id":"471f1a31.2f05d4","ty…