Getting SM5100B-D to work

Wireless & IoT
1

I’m trying to get Cellular shield SM5100B-D to work (http://www.sparkfun.com/products/9607)

Setup:

Netduino 5V to VIN on cellular shield. RX/TX connected to com2 (pins 2 and 3 on ND+), ground to ground.

The red light (on cellular shield) comes up, and I get some input on serial:

+SIND: 1

+SIND: 10,“SM”,1,“FD”,1,“LD”,1,“MC”,1,“RC”,1,“ME”,1

After that, I get two (or sometimes three) weird chars, after a couple of seconds, the sequence repeats (say every 15 seconds).

It seems like cellular module would be getting into initialization phase in a loop. I sent AT+SBAND=4 (I’m in Europe), but didn’t get a response to this.

Note that I’m powering this trough ND and monitoring current usage - it is around 80mA (init phase), drops to 55mA after that, so this should be within limits of what controller can supply, right?

Any ideas what is going on or what to test?

Thanks,

Miha

2

I’ve purchased an external power supply (12V, 2.2A) today, hooked it up, and Cellular shield did move forward and I got to +SIND4, so it seems to be working and the cause was not enough power through USB.

3

I was using an Arduino Uno and the SM5100B eval board but some of the info in this post might help:

http://labs.vectorform.com/2011/10/remo … no-sm5100b

-MT