Testing the GM862 Cellular Quad Band Module
A while back I decided to pull out the GM862 Cellular module I had, which was previously in the care of Bob until late May.
The version of the evaluation board I have is v2.5, and am waiting to receive the datasheet and schematic from SFE to look for an easy way of powering it from an external power source. The worst case solution would be to simply modify a mini-USB connector and give it 5vdc.
I then proceeded to install the CP2101 OS X driver, and did a ls -a /dev/cu* to see if it had ‘attached’ after a reboot. A few seconds later I proceeded to fire up Zterm and connected to the evaluation board @ 9600-8N1.
ATE1 V1
OK
AT
OK
AT+COPS?
+COPS: 0,0,”SRI DIALOG”OK
AT+COPS=?
+COPS: (2,”SRI DIALOG”,”",”41302″)+COPS: (3,”SRI 03″,”",”41303″)
+COPS: (3,”SRI 08″,”",”41308″)
+COPS: (3,”SRI 01″,”",”41301″)
OK
This let me know straight away that I was connected to DialogGSM and a list of the available networks was shown.
I then proceeded to test SMSs.
AT+CMGF?
+CMGF: 0OK
AT+CMGF=1
OK
AT+CMGS=”+94***”
> TEST MESSAGE!!
+CMGS: 18OK
AT+CMGL
+CMGL: 9,”REC UNREAD”,”+94***”
TEST MESSAGE!!
OK
To be notified of SMSs received,
AT+CNMI?
+CNMI: 0,0,0,0,0OK
AT+CNMI=2,2,0,0,0
OK
AT+CNMI?
+CNMI: 2,2,0,0,0OK
…and this will result in something similar to the following when a SMS is received,
+CMTI: “SM”,9
To find the IMEI,
AT+CGSN
3**************OK
I later played with various features and even managed to get GPRS working, and assign have an IP address assigned.
The GM862-GPS is another module that also incorporates a GPS receiver, which could prove extremely handy in a mobile application.
With this unit one can reliably provide a ‘remote’ for various applications, maybe to open your gate at home, get the coffee machine running and coupled with either the GPS module, or a separate GPS module, one could easily track your car incase of theft or to simply record where you’ve been.
- Bench Power Supply 0-30V@1.5A
- GDP Robot…
- SG-1/Atlantis: Most Enjoyable
- Life: Update!
- PIC: PWM Fan Controller
Decided to layout the PCB and get my bench PSU finished. It features a modular design with PIC output of the voltage measured via the A/D module - why use a PIC? Why not :p It offers flexibili...
The final competition went better than expected. In each round we collected a minimum of one ball, and as seen above, once it even collected six balls, and it would have been seven if it had not ...
Today is well of course...um....Sunday. I woke up today feeling well, sleepy. Today is the day most of us reserve to feel lazy and enjoy a very slow morning, while the rest, like my Mom, choose to g...
Talk about neglecting my blog! Well, wot can I say, I've been busy. As far as interesting goes, I've *also* been working on this, ...where I'm prototyping my GPS clock system. Basically ...
1157hrs I spent the better part of this morning tidying up the circuit (more for deployment inside the casing) and moving the conroe box to make space for some work I have to attend to. I decided ...