RF — Radio Frequency (APN / SIM / PPP credentials)

Configures the modem's APN, SIM PIN, and PPP authentication credentials for cellular data connectivity.

Format

• Query APN: >QRFA<
• Set APN: >SRFA[APN]<
• Query PIN: >QRFI<
• Set PIN: >SRFI[PIN]<
• Query PPP login: >QRFL<
• Set PPP login: >SRFL[login]<
• Query PPP password: >QRFP<
• Set PPP password: >SRFP[password]<

Sub-command	Description	Max length
RFA	APN (Access Point Name)	63 chars
RFI	SIM PIN code	4 digits
RFL	PPP login username	31 chars
RFP	PPP password	31 chars

Examples

Query current APN:

>QRFA<
>RRFAmobile.example.com<

Set APN:

>SRFAmobile.example.com<

Query SIM PIN:

>QRFI<
>RRFI1234<

Set SIM PIN:

>SRFI1234<

Query PPP login:

>QRFL<
>RRFLmyuser<

Set PPP login:

>SRFLmyuser<

Clear PPP login:

>SRFL<

Query PPP password:

>QRFP<
>RRFPs3cr3t<

Set PPP password:

>SRFPs3cr3t<

Clear PPP password:

>SRFP<

Notes

• All values are stored persistently in the configuration database.
• Sending >SRFL< or >SRFP< (empty payload) clears the stored value.
• PPP credentials take effect on the next connection attempt.

Related Signals

• F03 — GSM registered
• F05 — GPRS registered
• F08 — SIM inserted