How to run GPS/GPRS/GSM Module V3.0 correctly?
wahmalik85 2013-12-06 23:54:46 15848 Views3 Replies I am a beginner in Arduino and I bought a GPS/GPRS/GSM Module V3.0 a few days ago. I tried to run it as instructions that I found it in this link (http://www.dfrobot.com/wiki/index.php/G ... U:TEL0051) and nothing happen.
I did these steps:
- I added extrnal power (9v) to the Arduino board.
- I turned the S1 switch to the Prog(right side)
- I turned the S2 switch to the USB side(left side)
- I slide the switch of GSM/GPS to the middle
(Take off the GSM/GPS jumper caps from the Uart select.)
- I uploaded the sketch to the Arduino board
(The sketch for driving the gsm mode via the USB interface)
- I turned the S1 switch to the comm(left side)
- RST the board
When I reset the board and open Serial Monitor, I get only this symbol ( ÿ ) while booting.
I tried to send AT command, and nothing return.
The STAT LED was on (green light)
The NET LED was flash
Is there something wrong I did?
Or the GPS/GPRS/GSM Module V3.0 is not work correctly?
I need help for this problem
I increase the power from 7 volts to 12 volts, and it is worked now with some issues.
I upload the sketch for making call from arduino, and it is worked, but sometimes the STATS led light on and the board does not make the call, when I make a call from my cell phone to the SIM card on the module, I get that ** may be off or out the coverage area. I reset the board many times until it work again.
I notice that I must make 2 reset, first one will make STATS LED off, the second one will make the STATS LED on.
When I upload the sketch of driving the gsm mode via the USB interface, the module work correctly but I cant send AT commands through Serial Monitor or CoolTerm tool, it return nothing in Serial Monitor, in CoolTerm just Dots appear in the screen and nothing else.
wahmalik85 [quote="wahmalik85"]
When I reset the board and open Serial Monitor, I get only this symbol ( ÿ ) while booting.
I tried to send AT command, and nothing return.
The STAT LED was on (green light)
The NET LED was flash
[/quote]
Everytime arduino resets, it sends the "wake up" signal, to pin 5 on the setup loop. If the STAT LED and NET LED was on, and you open the IDE, the IDE sends a reset signal to the Arduino board which causes the 'wake up' signal to be sent again. This makes the GSM/GPS/GPRS v3 board to turn off basically.
My suggestion is that you keep close track of the stat and net leds and make sure they are still lit while you attemt to do Serial communication.
When you get ( ÿ ) note that the switches are right most likely, but the board is powered off. Check if at the same time you do the AT command and get ÿ the leds are still lit
Jose [quote="wahmalik85"]
When I reset the board and open Serial Monitor, I get only this symbol ( ÿ ) while booting.
I tried to send AT command, and nothing return.
The STAT LED was on (green light)
The NET LED was flash
[/quote]
Everytime arduino resets, it sends the "wake up" signal, to pin 5 on the setup loop. If the STAT LED and NET LED was on, and you open the IDE, the IDE sends a reset signal to the Arduino board which causes the 'wake up' signal to be sent again. This makes the GSM/GPS/GPRS v3 board to turn off basically.
My suggestion is that you keep close track of the stat and net leds and make sure they are still lit while you attemt to do Serial communication.
When you get ( ÿ ) note that the switches are right most likely, but the board is powered off. Check if at the same time you do the AT command and get ÿ the leds are still lit
Jose 