Problem with the GPS example and SUPL client

[THM]

We still have some Problems to use the Supl client Library, to test it we use the normal GPS example and seems like the connection is available with NB-Iot settings. We are in the DE network of the Telekom. The Supl client is creating the session send Bytes and get some Bytes back but then we get a UPL ossDecode fail with "SUPL error 1". Is there somewhere who test it already in DE and get it to work?

the log is the following:

2020-05-02T18:12:49.061Z DEBUG modem << Staring GPS application\x0D\x0A
2020-05-02T18:12:49.078Z DEBUG modem << GPS Socket created\x0D\x0A
2020-05-02T18:12:49.091Z DEBUG modem << Getting GPS data...\x0D\x0A
2020-05-02T18:12:49.107Z DEBUG modem << \x1B[1;1H\x1B[2JNew AGPS data requested, contacting SUPL server, flags 59\x0D\x0A
2020-05-02T18:12:49.141Z DEBUG modem << Established LTE link\x0D\x0A
2020-05-02T18:13:08.383Z DEBUG modem << ip 4a7d:8cc0:: (c08c7d4a) port 7275\x0D\x0A
2020-05-02T18:13:08.938Z DEBUG modem << Starting SUPL session\x0D\x0D\x0A
2020-05-02T18:13:13.948Z DEBUG modem << ULP encoding length: 38\x0D\x0A
2020-05-02T18:13:13.961Z DEBUG modem << Bytes sent: 38\x0D\x0A
2020-05-02T18:13:14.764Z DEBUG modem << Bytes received: 7\x0D\x0A
2020-05-02T18:13:14.777Z DEBUG modem << ULP ossDecode fail 5\x0D\x0A
2020-05-02T18:13:14.778Z DEBUG modem << SUPL error: 1\x0D\x0A
2020-05-02T18:13:14.779Z DEBUG modem << ULP encoding length: 18\x0D\x0A
2020-05-02T18:13:14.779Z DEBUG modem << Bytes sent: 18\x0D\x0A
2020-05-02T18:13:14.779Z DEBUG modem << SUPL session internal resources released\x0D\x0A
2020-05-02T18:13:14.780Z DEBUG modem << Done\x0D\x0A

[Martin Lesund]

Hi THM,

Since you are in Germany you most likely need to use legacy PCO.

Please try to add the following two lines in the sample and re-test to see if it now works: (also changed the xsystemmode to nb-iot as you see)

#define AT_XSYSTEMMODE      "AT\%XSYSTEMMODE=0,1,1,0"       //notice the change
#define AT_XEPCO			"AT%XEPCO=0"                    //add this
#define AT_ACTIVATE_GPS     "AT+CFUN=31"
#define AT_ACTIVATE_LTE     "AT+CFUN=21"
#define AT_DEACTIVATE_LTE   "AT+CFUN=20"

#define GNSS_INIT_AND_START 1
#define GNSS_STOP           2
#define GNSS_RESTART        3

#define AT_CMD_SIZE(x) (sizeof(x) - 1)


#ifdef CONFIG_BOARD_NRF9160_PCA10090NS
#define AT_MAGPIO      "AT\%XMAGPIO=1,0,0,1,1,1574,1577"
#define AT_COEX0       "AT\%XCOEX0=1,1,1570,1580"
#endif

static const char     update_indicator[] = {'\\', '|', '/', '-'};
static const char     at_commands[][31]  = {
				AT_XSYSTEMMODE,
				AT_XEPCO,                           //add this
#ifdef CONFIG_BOARD_NRF9160_PCA10090NS
				AT_MAGPIO,
				AT_COEX0,
#endif

Best regards,

Martin L.