Hi all , first time poster.. i have a working sketch that is a tcpserver , when a client connects and sends its data i have to reply with following Expected response: [P]<0x00><1 byte polling interval in minutes> ACK CR LF Here, the square brackets are literal. The polling interval is a byte va…

[image] cequra: client.println("[P]x00\00000010\x06\x0d\x0e"); You can't have a null character (\x00 or \0) in a string. You have to use .write() with "char *, int" arguments where the 'int' is the number of characters. I think this will work: client.write("[P]\x00\x02\x06\x0d\x0a", 8); I…

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anon57585045 September 21, 2021, 8:40pm 4

You seem to know things that we don't. Please share the reason with us so that we can understand. Is there any reference for the protocol you are trying to match?

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