SIM800L strange behavior

[Giuseppe]

I made a GSM combiner based on SIM800L module. With one module I have no problems. The combiner works correctly. However, using other GSM modules always sim800L the combiner does not work. I sent the ATI command in response I have the SIM800 version in my case R 14.18 which is the same both in the ok module and in the non-functioning one. Then with the At&V command I display all the values ��set in the 2 modules. Comparing the parameter list there are some differences. Can you help me understand which values ��I have to change to make the non-functioning module work? Below I put the value list

(Module sim800L not working)
 
DEFAULT PROFILE
S0: 0
S3: 13
S4: 10
S5: 8
S6: 2
S7: 60
S8: 2
S10: 15
+CRLP: 61,61,48,6
V: 1
E: 1
Q: 0
X: 4
&C: 1
&D: 1
+CLTS: 0
+CREG: 0
+CGREG: 0
+CMEE: 0
+CIURC: 1
+CFGRI: 2
+CMTE: 0
+CANT: 0,0,10
+STKPCIS: 0
+CMGF: 0
+CNMI: 2,1,0,0,0
+CSCS: "IRA"
+VTD: 1
+CALS: 1
+CHF: 0
+CAAS: 1
+CBUZZERRING: 0
+DDET: 0
+MORING: 0
+SVR: 16
+CCPD: 1
+CSNS: 0
+CSGS: 1
+CNETLIGHT: 1
+SLEDS: 64,64,64,800,3000,300
+CSDT: 0
+CSMINS: 0
+EXUNSOL: 0
+FSHEX: 0
+FSEXT: 0
+CCTURI: 0
+IPR: 0
+IFC: 0,0
+CSCLK: 0

USER PROFILE
S0: 0
S3: 13
S4: 10
S5: 8
S6: 2
S7: 60
S8: 2
S10: 15
+CRLP: 61,61,48,6
V: 1
E: 1
Q: 0
X: 4
&C: 1
&D: 1
+CLTS: 0
+CREG: 0
+CGREG: 0
+CMEE: 0
+CIURC: 1
+CFGRI: 2
+CMTE: 0
+CANT: 0,0,10
+STKPCIS: 0
+CMGF: 0
+CNMI: 2,1,0,0,0
+CSCS: "IRA"
+VTD: 1
+CALS: 1
+CHF: 0
+CAAS: 1
+CBUZZERRING: 0
+DDET: 0
+MORING: 0
+SVR: 16
+CCPD: 1
+CSNS: 0
+CSGS: 1
+CNETLIGHT: 1
+SLEDS: 64,64,64,800,3000,300
+CSDT: 0
+CSMINS: 0
+EXUNSOL: 0
+FSHEX: 0
+FSEXT:
S6: 2
S7: 60

S6: 2
S7: 60
IPR: 0
+IFC: 0,0
+CSCLK: 0

ACTIVE PROFILE
S0: 0
S3: 13
S4: 10
S5: 80,0,10
+STKPCIS0,0,10
+STKPCIS+CRLP: 61,61,48,6
V: 1
E: 1
Q: 0
X: 4
&C: 1
&D: 1
+CLTS: 0
+CREG: 0
+CGREG: 0
+CMEE: 0
+CIURC: 1
+CFGRI: 2
+CMTE: 0
+CANT: : 0
+CMGF: 0
+CNMI: 2,1,0,0,0
+CSCS: "IRA"
+VTD: 1
+CALS: 1
+CHF: 0
+CAAS: 1
+CBUZZERRING: 0
+DDET: 0
+MORING: 0
+SVR: 16
+CCPD: 1
+CSNS: 0
+CSGS: 1
+CNETLIGHT: 1
+SLEDS: 64,64,64,800,3000,300
+CSDT: 0
+CSMINS: 0
+EXUNSOL: 0
+FSHEX: 0
+FSEXT: 0
+CCTURI: 0
+IPR: 0
+IFC: 0,0
+CSCLK: 0
OK
'----------------------------------------------------------------------------------------------------------------------(Module Sim800L that works)
DEFAULT PROFILE
S0: 0
S3: 13
S4: 10
S5: 8
S6: 2
S7: 60
S8: 2
S10: 15
+CRLP: 61,61,48,6
V: 1
E: 1
Q: 0
X: 4
&C: 1
&D: 1
+CLTS: 0
+CREG: 0
+CGREG: 0
+CMEE: 0
+CIURC: 1
+CFGRI: 2
+CMTE: 0
+CANT: 0,0,10
+STKPCIS: 0
+CMGF: 0
+CNMI: 2,1,0,0,0
+CSCS: "IRA"
+VTD: 1
+CALS: 1
+CHF: 0
+CAAS: 1
+CBUZZERRING: 0
+DDET: 0
+MORING: 0
+SVR: 16
+CCPD: 1
+CSNS: 0
+CSGS: 1
+CNETLIGHT: 1
+SLEDS: 64,64,64,800,3000,300
+CSDT: 0
+CSMINS: 0
+EXUNSOL: 0
+FSHEX: 0
+FSEXT: 0
+CCTURI: 0
+IPR: 0
+IFC: 0,0
+CSCLK: 0

+CRLP: 61,61,4
+CRLP: 61,61,4S0: 0
S3: 13
S4: 10
S5: 8
S6: 2
S7: 60
S8: 2
S10: 15CMTE: 0
+CANT:CMTE: 0
+CANT:
Q: 0
X: 4
&C: 1
&D: 1
+CLTS: 0
+CREG: 0
+CGREG: 0
+CMEE: 0
+CIURC: 1
+CFGRI: 2
+ 0,0,10
+STKPCIS: 0
+CMGF: 1
+CNMI: 2,1,0,0,1
+CSCS: "IRA"
+VTD: 1
+CALS: 1
+CHF: 0
+CAAS: 1
+CBUZZERRING: 0
+DDET: 0
+MORING: 0
+SVR: 16
+CCPD: 1
+CSNS: 0
+CSGS: 1
+CNETLIGHT: 1
+SLEDS: 64,64,64,800,3000,300
+CSDT: 0
+CSMINS: 0
+EXUNSOL: 0
+FSHEX: 0
+FSEXT: 0
+CCTURI: 0
+IPR: 9600
+IFC: 0,0
+CSCLK: 0

ACTI0
X: 4
&C: 1
0
X: 4
&C: 1
 0
S3: 13
S4: 10
S5: 8
S6: 2
S7: 60
S8: 2
S10: 15
+CRLP: 61,61,48,6
V: 1
E: 0
Q: &D: 1
+CLTS: 0
+CREG: 0
+CGREG: 0
+CMEE: 0
+CIURC: 1
+CFGRI: 2
+CMTE: 0
+CANT: 0,0,10
+STKPCIS: 0
+CMGF: 1
+CNMI: 2,1,0,0,1
+CSCS: "IRA"
+VTD: 1
+CALS: 1
+CHF: 0
+CAASHEX: 0
+FSEXT:SHEX: 0
+FSEXT:NG: 0
+DDET: 0
+MORING: 0
+SVR: 16
+CCPD: 1
+CSNS: 0
+CSGS: 1
+CNETLIGHT: 1
+SLEDS: 64,64,64,800,3000,300
+CSDT: 0
+CSMINS: 0
+EXUNSOL: 0
+F 0
+CCTURI: 0
+IPR: 9600
+IFC: 0,0
+CSCLK: 0
OK

[kcsl]

From what I can see in your profiles, the non-working module has auto-baud enabled (+IPR=0) and is in PDU mode (+CMGF=0), whereas your working module is set to fixed baud at 9600 and SMS text mode. Try sending these commands to the non-working module:

AT+IPR=9600
AT+CMGF=1
AT&W

Regards,
Joe

[Giuseppe]

Setting these commands with a serial
AT+IPR=9600
AT+CMGF=1
AT&W
the module stores them and keeps them in memory even if I remove the power?
thanks to all

[kcsl]

The fact that you have two modules returning different parameters seems to imply parameters are stored within the device.
But you should test for yourself with your modules.

Change some settings, cycle the power and then read back the settings and compare.

Regards,
Joe

[trastikata]

For similar devices you need to send "AT" after reset until you receive "OK" response, otherwise they might miss the first few commands, something like:

Code Select Expand

Repeat
        SerOut PORTC.6, 84, ["AT",13]
        GoSub CHECK_RESPONSE
        DelayMS 500
    Until RESPONSE = "OK"


[Yasin]

Setting these commands with a serial
AT+IPR=9600
AT+CMGF=1
AT&W
the module stores them and keeps them in memory even if I remove the power?
thanks to all

Yes