Humans like words, computers like binary. For example, to turn on a LED, I have seen (silly) commands like “RED LED ON” or “RED LED OFF.” While you could use something like strcmp(), as I showed on the Multiple MQTT Topics example, that tends to be overkill for most serial commands.
The mistake I see many people make is that they try to send full-text strings as serial commands. The computer could be a PC, a Raspberry Pi, or any device that communicates with serial.īy sending and “decoding” a single character it is easy to add a simple debug menu or even serial menu. Sending simple serial commands to an Arduino is the easiest way to communicate between an Arduino and a computer.
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