Dont try ot on my own, but the documentation says, you can switch the EDGE Mode On or Off.
https://codius.ru/file/download/4f7cb937-b8a7-4e28-bd24-c23d9a03c9da
on page 200
this CEGPRS command gives error.. is there some command that comes first ?
AT+CEGPRS=?
ERROR
AT+CEGPRS?
ERROR
Same problem, module is seeing network but dont connect...
Finding Networks. Please wait..
AT+COPS=?
+COPS: ,(0-4),(0-2)
OK
Available Networks:
Finding Networks. Please wait..
AT+COPS=?
+COPS: (1,"TELE2","TELE2","24803"),,(0-4),(0-2)
OK
Available Networks:
Network Name->TELE2
Network ID->24803
Network Status->Available
AT+COPS=4,2,"24803"
ERROR
+CPIN: READY
Call Ready
SMS Ready
You can visit the site for more information, click here
I have purchased SIM900 and still waiting for SIM800C and SIM800L. Firstly I attached my SIM900 directly to the UNO and it didn't connect to the network. Afterwards I tried it over a breadboard supply and the result was the same. Still I have several 2G networks available. So after a triple flash on the SIM900 module a NetLight (D6 led diode) goes off. Now I'm waiting for an AC/DC power supply with 5V and 2A, some ESR capacitors, diodes,... for more tries. In my opinion some of these problems comes from 2G network unavailability while some are power supply related. According to the datasheet from the manufacturer all these SIMs need 4 Volts and in peak 2 AMPS, either through a boost or a DC-DC converter. I plan to make a small circuit and to position it the closest possible to the VBAT (34, 35 pins) and GND (36, 37) as shown in two attached JPEGs. If you are making your own PCB board the manufacturer also recommends lines at least 1 millimeter thick. Hopefully this could solve some of our issues.
2g sim card is not available here in India so i like to have some advice what to do if gsm module800A not registering on network
Check if the IMEI number written on the module matches the number that you receive on the AT+cgsn command.
I have the same problem described here (cannot register to network) and these numbers do not match and I suspect that the issue is that I might have a cloned module.
AT command is not working..!!
Jayesh_Adwani:
2g sim card is not available here in India so i like to have some advice what to do if gsm module800A not registering on network
SIM800 is a 2G modem, if 2G is not available in your country, you cannot use it.
Any idea which module to use..?
Well, check UMTS modules like sim5320 or the new narrowband (if available in your country) like sim7000
Thanks anyway..!!
Try to see this video
1 Like
I have the same problem, please help me. I use the GSM library, GSMSim_SIM example to link ESP8266 and Sim800c. I received
this messages in Serial Port.
this thread seems interesting, I just want to clear that is that possible to unlock the network-locked Samsung phone by this hardware method instead of using online unlocking services like this?
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