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trying to hook on an Arduino mini pro (3.3 V) to the SIM908 break out board #71

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
Hi,

I am trying to hook on an Arduino mini pro (3.3 V) to the SIM908 break out 
board (see http://store.open-electronics.org/Small_Breakout_SIM908, but I run 
into difficulties.

I managed to start the SIM908 modem from within the example SMS Arduino code 
from this link: http://code.google.com/p/gsm-shield-arduino/. I also followed 
the schematics shown here: 
http://www.open-electronics.org/gsm-gps-shield-for-arduino/ for my connections 
from the Arduino mini pro (3.3 V) to the SIM908 break out board. Currently I 
have connected: D2 and D3 for the SoftwareSerial Tx and Rx connections (PIN 12 
& 14 break out), D8 for ON/OFF (PIN 1 break out), D12 to DTR (PIN 10) and D9 to 
STATUS (PIN 16). I guess with these I should be able to get the modem 
registered to the network, but it does not. I see in the Arduino IDE's serial 
monitor the following output: "GSM Shield testing status=IDLE".

The modem has its power through the raw pin from the Arduino, which has its 
power from a 3.7 Volt 2600 mAh Lipo battery. That must be able to give a 2 A 
boost to the modem, when it needs it. Level converting does not seem to be 
necessary, with the Arduino PINS at 3.3 Volt.

Who can help here?

Thanks in advance! Please send e-mail to addydej AT xs4all DOT nl.

Original issue reported on code.google.com by russisch...@gmail.com on 1 Apr 2013 at 7:56

GoogleCodeExporter commented 9 years ago 
Dear Sir,
Did you solve your problem. I am experimenting the same issue and can solve it. 
I know that a pulse of 2sec must be "send" to pin 1 ON/OFF. In my point of view 
the SIM908 shield is not corretely powered.

Also how do connect GPS_RX and GPS_TX to the Arduino pin. You should listen the 
two port as you are using two serial. How did you process to listing the two 
port as _call.listening.

I will investigate more on this issue and if I have good new, I will let you 
informed
Cheers

Original comment by pierrot1...@gmail.com on 29 May 2013 at 7:24

GoogleCodeExporter commented 9 years ago 
Hi Pierrot,

Thanks for your answer. I have not solved this matter yet. Any news from your 
side is much appreciated.

Cheers

Original comment by russisch...@gmail.com on 12 Jun 2013 at 10:13

GoogleCodeExporter commented 9 years ago 
This issue section is not longer supported.
Please check the support page www.gsmlib.org

Original comment by martines...@gmail.com on 6 Jul 2013 at 11:27