search

Xinyuan-LilyGO / T-SIM7600X

126 stars 41 forks source link

GPS not Working Lilygosim7600E-H #67

Open sandeepkumar449 opened 1 year ago

sandeepkumar449 commented 1 year ago

hi i am using Lilygosim7600E-H to get GPS Location in NMEA But Not getting any Location I (0) cpu_start: App cpu up. I (231) cpu_start: Pro cpu start user code I (231) cpu_start: cpu freq: 160000000 Hz I (231) cpu_start: Application information: I (235) cpu_start: Project name: nmea_parser I (241) cpu_start: App version: v5.2-dev-2383-g82cceabc6e-dirty I (248) cpu_start: Compile time: Sep 4 2023 14:54:34 I (254) cpu_start: ELF file SHA256: cbc964530... I (259) cpu_start: ESP-IDF: v5.2-dev-2383-g82cceabc6e-dirty I (266) cpu_start: Min chip rev: v0.0 I (271) cpu_start: Max chip rev: v3.99 I (276) cpu_start: Chip rev: v3.0 I (281) heap_init: Initializing. RAM available for dynamic allocation: I (288) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM I (294) heap_init: At 3FFB29C0 len 0002D640 (181 KiB): DRAM I (300) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM I (306) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM I (313) heap_init: At 4008D2D8 len 00012D28 (75 KiB): IRAM I (320) spi_flash: detected chip: generic I (324) spi_flash: flash io: dio I (328) app_start: Starting scheduler on CPU0 I (333) app_start: Starting scheduler on CPU1 I (333) main_task: Started on CPU0 I (343) main_task: Calling app_main() I (343) uart: queue free spaces: 16 I (343) nmea_parser: NMEA Parser init OK

droidblastnz commented 1 year ago

Are you inside or outside?

OmerFarukOruc commented 1 year ago

Are you inside or outside?

Do I need to be outside in order to have a signal? If so how many minutes approx. it connects to GPS?

droidblastnz commented 1 year ago

Suggest you try outside based on you comment Lilygosim7600E-H to get GPS Location in NMEA But Not getting any Location and time will depend on where you are and what you can see sat wise for the GPS.

Check the manual; Output of NMEA sentences is automatic; no control via AT commands is provided. If executing AT+CGPS=1, the GPS session will choose cold or hot start automatically. UE-based and UE-assisted mode depend on URL (AT+CGPSURL). When UE-based mode fails, it will switch standalone mode. UE-assisted mode is singly fixed. Standalone and UE-based mode is consecutively fixed. After the GPS closed, it should to wait about 2s~30s for start again. Reason: If the signal conditions are right (strong enough signals to allow ephemeris demodulation) or ephemeris demodulation is on going, sometimes MGP will stay on longer in order to demodulate more ephemeris. This will help the engine provide faster TTFF and possibly better yield later (up to 2 hours), because it has the benefit of more ephemeris available. For SIM7600E-H-M2/SIM7600SA-H-M2/SIM7600A-H-M2 module, GPS started should be decided by the physical switch of GPS flight mode in the module firstly. Close the switch, GPS will be started automatically, then you can open or close gps by AT command, otherwize, GPS could not be started in any way

Again reading the manual, AT+CGPSFTM Start GPS test mode

AT+CGPSFTM=1
OK
$GLGSV,78,20.6,66,25.6,77,21.6,79,21.9,67,26.2,68,23.6
$GPGSV,10,36.3,12,33.5,14,26.5,15,27.0,18,30.6,20,29.4,21,14.9,
24,32.8,25,30.6,31,29.1,32,27.0
$BDGSV,201,28.7,204,29.0,206,27.3,207,25.9,209,25.0,210,18.5

If test mode starts, the URC will report on AT port, Modem port and UART port. If testing on actual signal, should be ignored, and GPS must be started by AT+CGPS, AT+CGPSCOLD or AT+CGPSHOT. If testing on GPS signal simulate equipment, must be choiced, and GPS will start automatically. URC sentence will report every 1 second