Upgrading SIM800L with SIM800C firmware

Good morning.

I have some SIM800L, some have firmware v13 and others V14
I can’t update them at V14, it tells me that the firmware does not match.
If I take one v14 and put the V14 on it, program it as SIM800C I upgrade it.
If I do it with one with the V13, it tells me it doesn’t match.
I found, a firmware v14 that you can put by setting SIM800L instead of SIM800C, but nothing changes, is the same thing, I think they have only changed a few bytes, to make the programmer accept it

How to upgrade it ?

Good morning.
I dont think you should be trying to update a SIM800C firmware into a SIM800L module. SIM800L has FM hardware on it and SIM800C has bluetooth hardware on it. They are not really compatible modules.


In this post you have written to put the C in L, in fact in half part it works.

No i have not. Please point out :slight_smile:

Dear RaviPujar,
I am flowing your video and like your video.
I am from Bangladesh. recently near about 1 month our device can’t show GSM Location like lang lat. our code following below
AT+SAPBR=3,1,“Contype”,“GPRS”
AT+SAPBR=3,1,“APN”,“CMNET”
AT+SAPBR=1,1
AT+SAPBR=2,1
AT+CIPGSMLOC=1,1
+CIPGSMLOC: 0,0.000000,0.000000,2019/11/29,05:00:38
but recently there was no location long lat
Please help me if you have any solutions