EVK-L2 - User Guide
UBX-14000422 - R10
Starting up
Page 16 of 30
1.11
Registration on a cellular network
Command sent by DTE (user)
DCE response (module)
Description
AT+CREG?
+CREG: 0,1
OK
Verify the network registration.
AT+COPS=0
OK
Register the module on the network.
The cellular module automatically registers itself on the
cellular network. This command is necessary only if the
automatic registration failed (AT+CREG? returns 0,0).
AT+COPS?
+COPS: 0,0,"I TIM",7
OK
Read the operator name and radio access technology (RAT).
For further AT command examples regarding Mobile Network Operator, Radio Access Technology, and band
selection and configuration, see the
u-blox AT Commands Examples Application Note
1.12
Enable audio codec configuration to provide voice capability
Command sent by DTE (user)
DCE response (module)
Description
AT+UGPIOC?
+UGPIOC:
10,15
11,15
12,15
13,15
21,16
22,255
24,255
25,0
50,12
51,12
52,12
53,12
60,7
61,14
OK
Check the configuration of I2S pins (<gpio_id> = 50, 51, 52,
53): they must be configured as I2S digital audio interface
(<gpio_mode> = 12, as the factory-programmed value) to
provide voice capability at the headset jack connector using
the external audio codec mounted on the EVK-L2.
Check the configuration of the GPIO6 pin (<gpio_id> = 61):
it must be configured as master clock output (<gpio_mode>
= 14, as the factory programmed value) to provide voice
capability at the headset jack connector using the external
audio codec mounted on the EVK-L2.
AT+USPM?
+USPM:
1
,
1
,0,0,2
OK
Check the audio path mode setting: both the up-link and
the down-link paths must be configured as I2S digital audio
interface (e.g. <main_uplink> = 1, <main_downlink> = 1, as
the factory-programmed value) to provide voice capability at
the headset jack connector using the external audio codec
mounted on the EVK-L2.
AT+UEXTDCONF=0,1
OK
Enable the automatic configuration of the external Maxim
MAX9860 audio codec mounted on the EVK-L2.
The setting is saved in the non-volatile memory (NVM) and it
is applied at each subsequent module power-on.
AT+CPWROFF
OK
Switch off the EVK-L2.
The external Maxim MAX9860 audio codec mounted on the
EVK-L2 will be fed by the 13 MHz master clock provided by
the GPIO6 and it will be dynamically programmed over I
2
C
interface at any subsequent re-boot of the module and every
time audio path is enabled, providing voice capability at the
headset jack connector of the EVK-L2.
1.13
Switching off the EVK-L2
To switch off the EVK-L2, send the +CPWROFF AT command. Make sure to use this command before switching
off the main power, otherwise settings and configuration parameters may not be saved on the EVK-L2.
