Sending command over serial >64 bytes (>128 bytes)

Projects Networking, Protocols, and Devices
5

  • Serial.read() returns -1 when there's nothing to read. You either have to test for that or test for Serial.available() > 0 after each Serial.read() while you wait for the EOM.

  • Sending the ascii string "123" is not the same as sending the byte value 123.

  • PROTOCOL_SIZE is undefined, so you code doesn't compile.

You don't count how many characters you have received, and print the entire contents of the incoming_Char array. This way you'll see garbage or -1 after the last received char.

HTH