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drivers: modem: sara-r4: fix APN setting for U2 modem

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usage of AT+UPSD command per UBX-17003787(R15) command reference is:
AT+UPSD=<profile_id>, <param_tag>, <param_val>

For AT+UPSD=0, 1, "<value>": we are setting value to MCCMNO, which
is technically incorrect.  <param_tag> of 1 means:

1: APN - <param_val> defines the APN text string, e.g.
"apn.provider.com"; the maximum length is 99. The factory-programmed
value is an empty string.

Let's use APN here instead.  This fixes a +CME ERROR: 113 when
connecting with U2 modem.

Fixes: https://github.com/zephyrproject-rtos/zephyr/issues/22689

Signed-off-by: Michael Scott <mike@foundries.io>
This commit is contained in:
Michael Scott 2020-02-10 08:56:35 -08:00 • committed by Jukka Rissanen
commit e934825719
1 changed files with 1 additions and 1 deletions
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drivers/modem/ublox-sara-r4.c
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@ -753,7 +753,7 @@ static void modem_reset(void)
#if defined(CONFIG_MODEM_UBLOX_SARA_U2) #if defined(CONFIG_MODEM_UBLOX_SARA_U2)
/* set the APN */ /* set the APN */
SETUP_CMD_NOHANDLE("AT+UPSD=0,1,\"" SETUP_CMD_NOHANDLE("AT+UPSD=0,1,\""
CONFIG_MODEM_UBLOX_SARA_R4_MANUAL_MCCMNO "\""), CONFIG_MODEM_UBLOX_SARA_R4_APN "\""),
/* set dynamic IP */ /* set dynamic IP */
SETUP_CMD_NOHANDLE("AT+UPSD=0,7,\"0.0.0.0\""), SETUP_CMD_NOHANDLE("AT+UPSD=0,7,\"0.0.0.0\""),
/* activate the GPRS connection */ /* activate the GPRS connection */