Im new with arduino and I made this function

Question

it does this error: invalid conversion from 'char' to 'const char*' [-fpermissive] how do I fix this?enter image description here

Answer 1

First of all Arduino uses C++ language, The reason for the error: " invalid conversion from 'char' to 'const char*' " is that the function Serial.readStringUntill() returns a String, but you are trying to equate it with a character in myList=='A'(anything encased in ' is considered character in C++) , you can fix the error by accessing first character from the 'myList' and then equate like shown below

myList[0]=='A'