I have a 2 x 16 parallel LCD. It is attached to a protoshield attached to a UNO. It works fine on "Hello world" but when I have it hooked up to a thermocouple, it gives the Int temp as -127 and states T/C Problem. Then it goes bonkers with all 32 characters rapidly changing with various symbols like #,@,&, sigma and omega, etc.. Then it shuts down and then repeats.
However, the serial monitor sketch works fine and shows the proper temperature.
The LCD thermocouple sketch is from LadyAda who sells the TC and break out board/amplifier so I assume the sketch is not the problem.
This was a very inexpensive LCD - as a total noob, I am wondering if that could be the problem?
Any suggestions or recommendations would be greatly appreciated.