Hi,
We are working in a design based on bc92 module. The module has been updated to the latest version with the firmware you sent us.
We have followed the hardware design instruction and everything works fine if we use an outdoor high gain antenna. However, we are having issues when connecting to the network with an internal antenna.
Could you give us any hints on what might be the problem?
Attached is the commands used until the “noise” appears and the module is get completely unstable or have to be reseted.
> +CPIN: SIM PIN
***> ***
***> ***
> AT
> AT
> OK
> RDY
***> ***
> +CFUN: 1
***> ***
> +CPIN
> AT+QSCLK=0
> AT+QSCLK=0
> OK
> AT+CBC
> AT+CBC
> +CBC: 0,0,4140
***> ***
> OK
> AT+CPIN?
> AT+CPIN?
> +CPIN: SIM PIN
***> ***
> OK
> AT+CFUN?
> AT+CFUN?
> +CFUN: 1
***> ***
> OK
> ATI
> ATI
> Quectel_Ltd
> Quectel_BC92
> Revision: BC92RBR01A04
***> ***
> OK
> AT+QCCID
> AT+QCCID
> +QCCID: 8934568402100158900F
***> ***
> OK
> AT+CGSN=1
> AT+CGSN=1
> +CGSN: 866352043981354
***> ***
> OKATE0
> ATE0
> OKAT+QICFG=“showlength”,1
***> ***
> +QICFG: “showlength”,1
***> ***
> OKAT+CMEE=2
***> ***
> OKAT+QISWTMD=0,0
***> ***
> OKAT+QLEDMODE=1
***> ***
> OK
> AT+CPIN=“7037”
***> ***
> +CPIN: READY
***> ***
> OK
> AT+CPIN?
***> ***
> +CPIN: READY
***> ***
> OK
> AT+CFUN?
***> ***
> +CFUN: 1
***> ***
> OKModule Initialized Correctly
> Model BC92RBR01A04
> Battery Voltage = 4140 mV
> AT+CFUN=0
***> ***
> OK
> AT+QNWCFG=0,1
***> ***
> OKAT+CFUN=1
***> ***
> OKAT+CSQ
***> ***
> +CSQ: 99,99
***> ***
> OKAT+CSQ
***> ***
> +CSQ: 99,99
***> ***
> OKAT+CSQ
***> ***
> +CSQ: 99,99
***> ***
> OKAT+CSQ
***> ***
> +CSQ: 99,99
***> ***
> OKAT+CSQ
***> ***
> +CSQ: 99,99
***> ***
> OKAT+CSQ
***> ***
> +CSQ: 99,99
***> ***
> OKAT+CSQ
***> ***
> +CSQ: 99,99
***> ***
> OKAT+CSQ
***> ***
> +CSQ:\9016,99
***> ***
> \82OK\A1Z\D5l\D5H\F8
Thanks in advance.