![]() In C, the switch statement executes code based on the value of a variable. ![]() ![]() While not difficult, it does tend to start getting complicated. Depending on the line ending settings, a few extra characters might be sent automatically.Īsynchronous sending means that to capture multiple character commands requires you to buffer incoming characters. It is easy to get caught in the trap of thinking that typing a full word in the Serial Monitor and then clicking Send, means the entire word is sent immediately. 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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