Problem with instruction Serial.readStringUntil(char)

[StefanL38]

You could modify your string to have a start-character and an end-character and then use non-blocking receiving like explained in the serial input basics tutorial example 3 receive with start / end-character
example

start-character "<"
end-character ">"

Start and end-character can be included or excluded in the variable that is used for receiving

Serial Input Basics - updated

Updated Version Please note that this is a revised version of the advice in this earlier Thread which has become very long. As far as possible I have kept the code examples identical or simplifed them slightly. It should not be necessary to refer to the older Thread, but feel free to do so. Contents The following sections are in this Tutorial Introduction Serial data is slow by Arduino standards Example 1 - Receiving single characters Why code is organized into functions Exampl…

best regards Stefan