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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cequra September 22, 2021, 1:15pm 10

client.write("[P]\x00\x02\x06\x0d\x0a", 8); tried
and also tried
client.write("[P]\0x00\0x02\0x06\0x0d\0x0a", 8);
Still no joy

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