Hi,
OS: Windows 10
Editor: SEGGER Embedded Studio for ARM (Nordic Edition) V5.50c (64-bit)
nrfjprog version: 10.13.0
JLinkARM.dll version: 7.50a
nRF Connect SDK version: 1.6.0
SUPL client library version: v0.7.0
nRF9160 modem firmware version: 1.2.3
I'm having some problems with GPS and SUPL client library on our custom nRF9160 device. I'm using the nRF9160 GPS driver with a periodic GPS search mode and I have a similar gps_controller than Asset Tracker has. I also have PSM enabled.
In purpose, I tested the device inside a building so it won't get a GPS fix and see what the device is doing then. I'm not happy with the results. I see that timeout and interval is not working properly there.
Below is parts of the project configuration, code and also logs from the device.
prj.conf# GPS
CONFIG_NRF9160_GPS=y
CONFIG_GPS_CONTROL_FIX_CHECK_INTERVAL=1200
CONFIG_GPS_CONTROL_FIX_TRY_TIME=180
# AGPS
CONFIG_AGPS=y
CONFIG_AGPS_SRC_SUPL=y
CONFIG_FPU=y
# Heap and stacks
CONFIG_HEAP_MEM_POOL_SIZE=16384
CONFIG_MAIN_STACK_SIZE=8192
CONFIG_APPLICATION_WORKQUEUE_STACK_SIZE=4096
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=8192
CONFIG_IDLE_STACK_SIZE=2048
CONFIG_NRF_MODEM_LIB_HEAP_SIZE=2048
CONFIG_NRF9160_GPS_THREAD_STACK_SIZE=4608
gps_controller.c
/* GPS search configuration */
struct gps_config gps_cfg = {
.nav_mode = GPS_NAV_MODE_PERIODIC,
.power_mode = GPS_POWER_MODE_DISABLED,
.use_case = GPS_USE_CASE_SINGLE_COLD_START,
.accuracy = GPS_ACCURACY_NORMAL,
.timeout = CONFIG_GPS_CONTROL_FIX_TRY_TIME,
.interval = CONFIG_GPS_CONTROL_FIX_TRY_TIME +
CONFIG_GPS_CONTROL_FIX_CHECK_INTERVAL,
.delete_agps_data = false,
.priority = true,
};
main.c
#if defined(CONFIG_AGPS)
/* Request A-GPS data no more often than every hour (time in milliseconds). */
#define AGPS_UPDATE_PERIOD (60 * 60 * 1000)
static struct gps_agps_request agps_request;
static struct k_work_delayable send_agps_request_work;
#endif /* CONFIG_AGPS */
#if defined(CONFIG_AGPS)
/**@brief Request AGPS data. */
static void send_agps_request(struct k_work *work)
{
ARG_UNUSED(work);
int err;
static int64_t last_request_timestamp;
if ((last_request_timestamp != 0) &&
(k_uptime_get() - last_request_timestamp < AGPS_UPDATE_PERIOD)) {
LOG_WRN("A-GPS request was sent less than 1 hour ago");
return;
}
LOG_INF("Sending A-GPS request");
err = gps_agps_request_send(agps_request, GPS_SOCKET_NOT_PROVIDED);
if (err) {
LOG_ERR("Failed to request A-GPS data, error: %d", err);
return;
}
last_request_timestamp = k_uptime_get();
}
#endif /* CONFIG_AGPS */
/**@brief Callback for GPS events. */
static void gps_handler(const struct device *dev, struct gps_event *evt)
{
...
case GPS_EVT_AGPS_DATA_NEEDED:
LOG_INF("GPS_EVT_AGPS_DATA_NEEDED");
#if defined(CONFIG_AGPS)
/* Send A-GPS request with short delay to avoid LTE network-
* dependent corner-case where the request would not be sent.
*/
memcpy(&agps_request, &evt->agps_request, sizeof(agps_request));
k_work_reschedule_for_queue(&application_work_q,
&send_agps_request_work,
K_SECONDS(1));
#endif /* CONFIG_AGPS */
break;
...
}
}
/**@brief Main function. */
void main(void)
{
...
#if defined(CONFIG_AGPS)
k_work_init_delayable(&send_agps_request_work, send_agps_request);
#endif /* CONFIG_AGPS */
...
}
log[00:00:24.650,848] [1B][0m<inf> gps_control: GPS config set: Timeout = 180, Interval = 1380[1B][0m
[00:00:24.659,881] [1B][0m<inf> application: Enabling GPS[1B][0m
[00:00:24.665,954] [1B][0m<inf> gps_control: GPS starting in 0 seconds[1B][0m
[00:00:24.673,675] [1B][0m<dbg> nrf9160_gps.enable_gps: GPS mode is enabled[1B][0m
[00:00:24.686,340] [1B][0m<dbg> nrf9160_gps.start: GPS operational[1B][0m
[00:00:24.692,901] [1B][0m<inf> gps_control: GPS started successfully. Searching for satellites
to get position fix. This may take several minutes.
The device will attempt to get a fix for 180 seconds,
before the GPS is stopped. It's restarted every 1200 seconds[1B][0m
[00:00:24.718,627] [1B][0m<inf> application: GPS_EVT_SEARCH_STARTED[1B][0m
[00:00:24.725,708] [1B][0m<dbg> nrf9160_gps.gps_thread: A-GPS data update needed[1B][0m
[00:00:24.733,642] [1B][0m<inf> application: GPS_EVT_AGPS_DATA_NEEDED[1B][0m
[00:00:25.693,237] [1B][0m<dbg> nrf9160_gps.gps_thread: Waiting for time window to operate[1B][0m
[00:00:25.702,117] [1B][0m<inf> application: GPS_EVT_OPERATION_BLOCKED[1B][0m
[00:00:25.740,905] [1B][0m<inf> application: Sending A-GPS request[1B][0m
[00:00:25.747,772] [1B][0m<dbg> agps.init_supl: Using GPS driver to input assistance data[1B][0m
[00:00:25.756,622] [1B][0m<inf> agps: SUPL is initialized[1B][0m
[00:00:25.884,735] [1B][0m<dbg> agps.open_supl_socket: ip 142.250.150.192 (c096fa8e) port 7276[1B][0m
[00:00:25.971,160] [1B][0m<inf> agps: Starting SUPL session[1B][0m
[00:00:28.325,286] [1B][0m<dbg> agps.supl_logger: SUPL session finished[1B][0m
[00:00:28.332,366] [1B][0m<inf> agps: SUPL session finished successfully[1B][0m
[00:00:28.339,599] [1B][0m<dbg> net_sock.z_impl_zsock_close: (application_work_q): close: ctx=0x20021200, fd=1[1B][0m
[00:00:35.718,322] [1B][0m<dbg> nrf9160_gps.gps_priority_set: GPS priority enabled[1B][0m
%CESQ: 255,0,255,0
[00]+CSCON: 0
[00][00:00:40.088,928] [1B][0m<dbg> lte_lc.at_handler: +CSCON notification[1B][0m
[00:00:40.096,038] [1B][0m<inf> application: RRC mode: Idle[1B][0m
[00:00:40.152,313] [1B][0m<dbg> nrf9160_gps.gps_thread: GPS has time window to operate[1B][0m
[00:00:40.160,797] [1B][0m<inf> application: GPS_EVT_OPERATION_UNBLOCKED[1B][0m
[00:00:40.168,334] [1B][0m<dbg> nrf9160_gps.print_satellite_stats: Tracking: 0 Using: 0 Unhealthy: 0[1B][0m
[00:00:40.178,222] [1B][0m<dbg> nrf9160_gps.print_satellite_stats: Seconds since last fix 40[1B][0m
[00:03:24.098,236] [1B][0m<dbg> nrf9160_gps.print_satellite_stats: Seconds since last fix 204[1B][0m
[00:03:29.107,727] [1B][0m<inf> application: GPS_EVT_SEARCH_TIMEOUT[1B][0m
[00:03:29.114,685] [1B][0m<inf> application: GPS will try to get fix again after 1200 seconds,
and will try again 2 more times[1B][0m
[00:12:15.414,703] [1B][0m<inf> application: GPS_EVT_SEARCH_STARTED[1B][0m
[00:12:15.421,661] [1B][0m<dbg> nrf9160_gps.print_satellite_stats: Tracking: 0 Using: 0 Unhealthy: 0[1B][0m
[00:12:15.431,549] [1B][0m<dbg> nrf9160_gps.print_satellite_stats: Seconds since last fix 735[1B][0m
[00:26:24.443,939] [1B][0m<dbg> nrf9160_gps.print_satellite_stats: Seconds since last fix 1584[1B][0m
[00:26:29.453,521] [1B][0m<inf> application: GPS_EVT_SEARCH_TIMEOUT[1B][0m
[00:26:29.460,479] [1B][0m<inf> application: GPS will try to get fix again after 1200 seconds,
and will try again 1 more times[1B][0m
[00:37:15.449,981] [1B][0m<inf> application: GPS_EVT_SEARCH_STARTED[1B][0m
[00:37:15.456,939] [1B][0m<dbg> nrf9160_gps.print_satellite_stats: Tracking: 0 Using: 0 Unhealthy: 0[1B][0m
[00:37:15.466,857] [1B][0m<dbg> nrf9160_gps.print_satellite_stats: Seconds since last fix 2235[1B][0m
[00:49:24.476,348] [1B][0m<dbg> nrf9160_gps.print_satellite_stats: Seconds since last fix 2964[1B][0m
[00:49:29.485,961] [1B][0m<inf> application: GPS_EVT_SEARCH_TIMEOUT[1B][0m
[00:49:29.492,919] [1B][0m<inf> application: Disabling GPS[1B][0m
[00:49:29.499,084] [1B][0m<inf> gps_control: GPS stopping in 0 seconds[1B][0m
[00:49:29.506,134] [1B][0m<dbg> nrf9160_gps.stop_gps: Stopping GPS[1B][0m
[00:49:29.521,514] [1B][0m<inf> gps_control: GPS operation was stopped[1B][0m
[00:49:29.528,503] [1B][0m<inf> application: GPS_EVT_SEARCH_STOPPED[1B][0m
I read this ticket and I think that almanac downloads might have something to do with this. But shouldn't it already have ephemerides and almanacs downloaded from SUPL?
Is there any way to avoid those downloads or make timeout and interval working properly?
Or am I doing something wrong on A-GPS request?
It's killing the battery pretty fast when GPS is active for so long.
Regards,
Tero
