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Junior Member level 3
SIM800L network registration and random output problem ?
Hi all,
got myself those small SIM800L off ebay.
Just for a try I decided to power it up (through zener diode 1N4007) and connect to USB to serial module to see how it works.
Problem is that when I power it up, and try to send commands it constantly sends:
Also ... another example:
Has anyone experienced similar problems?
Also COPS returns 0, could modem be locked to network or something?
I know about SIM900A flashing with SIM900 firmware, and it work I've tested it, are there any similar quirks with this SIM800L module?
- - - Updated - - -
PS: Does anyone knows where to get tools and firmware to flash this modem?
Hi all,
got myself those small SIM800L off ebay.
Just for a try I decided to power it up (through zener diode 1N4007) and connect to USB to serial module to see how it works.
Problem is that when I power it up, and try to send commands it constantly sends:
Code:
AT
OK
+CPIN: READY
AT
OK
AT
OK
Call Ready
AT
OK
SMS Ready
AT
OKAlso ... another example:
Code:
AT+COPS?
Call Ready
+COPS: 0
OK
SMS ReadyHas anyone experienced similar problems?
Also COPS returns 0, could modem be locked to network or something?
I know about SIM900A flashing with SIM900 firmware, and it work I've tested it, are there any similar quirks with this SIM800L module?
- - - Updated - - -
PS: Does anyone knows where to get tools and firmware to flash this modem?