What does the serial output show you - I’m betting it is:
Received 2 bytes of payload
as that’s what you have sent - two bytes, and you’ve coded to check for 1. So why the 0? But I agree, it’s not clear what you put in the various boxes - suffice to say, it’s not hex and it translates whatever characters you enter in to binary.
So, to speed things up, that 1 will actually be turned in to 49 which is the decimal for the character 1. You may want to Serial.print the result so you can see what you actually receive.