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Arduino

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    There is no such thing as "a whole string" in serial. There is only single bytes. It is your job to decide (and program it so it understands) what a string is. Commented May 22, 2021 at 15:06
  • Then how can I watch for example for line break? Commented May 22, 2021 at 15:15
  • WHy do yoiu ithink you need to? And if you want to get serial data into a variable and then use that serial data for some other thing, just use whatever you stored in your variable. Once you read from serial it's gone from serial forever. But you saved it in data, so just use it from there? Commented May 22, 2021 at 15:19
  • What about Serial.readStringUntil() and read to e. g. \n? Commented May 22, 2021 at 16:05