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Topic: Project 4 Question - How to change the LED color, reading the serial print (Read 2012 times) previous topic - next topic


Hi all, I have finished setting up the project 4 exercise, breadboard, code and all.

I can't get the led to change any other color, it only appears blue.

How do you get the LED to change color?

Also when I open up the serial monitor in the IDE I get lightning speed values racing across my screen, I turn of autoscroll and it's hard to keep up.

Is this just the way it is? Anything I can do?


First of all we'll need a good, clear photo of your circuit to see how you have wired it up.

Secondly to slow down the screen prints without blocking you will need to investigate the 'Blink without delay' concept. There is an example with the IDE. You could just add a delay(1000); at the end of the loop but that stops your script dead for the interval specified.
Beginners guide to using the Seeedstudio SIM900 GPRS/GSM Shield

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