# nrf9151-probe 2026-10-13T23:55:37Z kernel 7.3.0-rc5

## pin muxing (pinctrl debugfs)
pin 2 (IO2): device 91403000.serial function nrf9151-en-pins group nrf9151-en-cfg
pin 28 (IO28): device 91403000.serial function uart3-nrf-pins group uart3-txd-cfg
pin 29 (IO29): device 91403000.serial function uart3-nrf-pins group uart3-rxd-cfg
pin 50 (IO50): device 91403000.serial function uart3-nrf-pins group uart3-io50-io51-release-cfg
pin 51 (IO51): device 91403000.serial function uart3-nrf-pins group uart3-io50-io51-release-cfg

## enable line before the probe
gpiochip0 2	"nrf9151-enable"	input

## enable low: does the modem answer?

## exchange (ms since start; > sent, < received)
  1529 ms > AT
## enable high at 3569 ms
  5162 ms < Ready
  5473 ms < +CEREG: 90
  9634 ms > AT
  9673 ms < OK
 10683 ms > AT+CGMR
 10726 ms < mfw_nrf91x1_2.0.3
 10743 ms < OK
 11736 ms > AT#XSMVER
 11776 ms < ERROR
 12785 ms > AT#XSLMVER
 12826 ms < #XSLMVER: "2.9.0","2.9.0-cellular-a52f6a06a9e4"
 12845 ms < OK
 13842 ms > AT+CFUN?
 13884 ms < +CFUN: 1
 13902 ms < OK
 14893 ms > AT+CFUN=1
 14934 ms < OK
 15171 ms < +CEREG: 90
 17947 ms > AT%XSIM?
 17988 ms < %XSIM: 0,9
 18006 ms < OK
 18995 ms > AT+CPIN?
 19036 ms < ERROR
 20046 ms > AT+CEREG?
 20086 ms < +CEREG: 5,90
 20104 ms < OK
 21094 ms > AT+COPS?
 21135 ms < +COPS: 0
 21153 ms < OK
 23147 ms > AT+CESQ
 23191 ms < +CESQ: 99,99,255,255,255,255
 23211 ms < OK
 44226 ms > AT+CFUN=4
 44267 ms < OK
 44285 ms < +CEREG: 0
## enable low at 47331 ms

## enable line after the probe
gpiochip0 2	"nrf9151-enable"	output

## first +CEREG URC after enable (firmware's own attach), if any
(see the exchange above; the probe sends nothing that requests an attach before AT+CFUN=1)
# end