add PIN number

[mezelve]

Maybe it would be nice to add:

define PINNUMBER "YOUR_PIN_CODE"

and change the gsmAccess.begin into:

while (gsmAccess.begin(PINNUMBER, false) != GSM_READY) {
delay(1000);
}

It wasn't the most difficult part to figure out while building your DIY Cellphone. But it could help others.
Thanks again for the awesome documentation.

[damellis]

Thanks for the suggestion! So far, none of the SIM cards I've used have needed a PIN, so this wasn't really on the radar. Good idea, though.

I'm impressed that you got everything ordered and assembled and (seemingly) working based on my rather sparse documentation. What'd you think? Any other suggestions?

[mezelve]

I think in Europe each commercial SIM card has a PIN. (I found the solution in the GSM library.)

It was the second time that I've soldered SMD components and it went quite well. The speaker was hard.
And ... I've lost the antenna the other day and I'm waiting for a replacement.
So I couldn't really test the speaker and microphone yet. That were the 2 most difficult parts.
Maybe some pads could be a little bigger.

The M0 holes are (too) small. But someone mentioned that before. I haven't found an EU online shop which carries them.

It would be great if you could document the pins in JP1. They are 5 spare pins right. Maybe some sample code how to use them. Eg. if I would hook up a button to one and it would send a predefined text message to a certain number.

I'll definitely dig deeper into the code and see if I could add images etc.
How different is it from the official arduino GSM shield? I guess not that much besides the available pins.

Your documentation is excellent IMHO. But I guess it's not a project for arduino or soldering newbies.
Thank you again.