Hello, I have a problem with my T-Beam, that I get no location from the GPS.
I received the Lilygo T-Beam (directly from their website) which should be V.1.1 but it is V.1.2 (2023). I read about several problems with the new PMU (AXP2101), that could be a reason for the non working GPS. But most users seemed to have different GPS types, not the Ublox Neo-6m. I’ve tried different firmware’s and GPS antennas, I left the device outside for several hours but I got no GPS lock. The GPS reset sketch also didn’t changed anything (it also seems to be for the ‘NEMA’ GPS and not ‘UBLOX’). I tried config with the Android and Desktop app, I can use the GPS position from my phone via the App, but the LED next to the GPS doesn’t light up at all.
I’m new to Meshtastic and I dont now what the ‘telemetry/power metrics’ option should display but according to the existence of a PMU I thought there also should be some data, because in my case it says “no measurement” on the display of the device itself? (Its a different problem, but may still correlate with the GPS problem?)
Thanks in advance for your help! 
For the following log I used the Alpha 2.3.8.d490a33 from the Meshtastic flasher with the EU_868 setting (Stable 2.3.7.30 and other also versions didn’t changed anything):
Thats a part after a fresh firmware install:
DEBUG | ??:??:?? 3 [GPS] Module Info :
DEBUG | ??:??:?? 3 [GPS] Soft version: 7.03 (45969)
DEBUG | ??:??:?? 3 [GPS] Hard version: 00040007
DEBUG | ??:??:?? 3 [GPS] Extensions:0
INFO | ??:??:?? 5 [GPS] GNSS module configuration saved!
WARN | ??:??:?? 5 [GPS] GPS FactoryReset requested
And that after a normal reset:
//\ E S H T /\ S T / C
INFO | ??:??:?? 0 Booted, wake cause 0 (boot count 1), reset_reason=reset
DEBUG | ??:??:?? 0 Filesystem files (491520/1048576 Bytes):
DEBUG | ??:??:?? 0 /prefs/channels.proto (57 Bytes)
DEBUG | ??:??:?? 0 /prefs/config.proto (90 Bytes)
DEBUG | ??:??:?? 0 /prefs/db.proto (316 Bytes)
DEBUG | ??:??:?? 0 /prefs/module.proto (112 Bytes)
DEBUG | ??:??:?? 0 /static/.gitkeep (0 Bytes)
DEBUG | ??:??:?? 0 /static/Logo_Black.svg.gz (602 Bytes)
DEBUG | ??:??:?? 0 /static/Logo_White.svg.gz (610 Bytes)
DEBUG | ??:??:?? 0 /static/apple-touch-icon.png.gz (3164 Bytes)
DEBUG | ??:??:?? 0 /static/favicon.ico.gz (2270 Bytes)
DEBUG | ??:??:?? 0 /static/icon.svg.gz (852 Bytes)
DEBUG | ??:??:?? 0 /static/index-BMhLjTmL.css.gz (16270 Bytes)
DEBUG | ??:??:?? 0 /static/index-Bt2MYVVB.js.gz (203021 Bytes)
DEBUG | ??:??:?? 0 /static/index-CGqDWSD_.js.gz (348 Bytes)
DEBUG | ??:??:?? 0 /static/index.html.gz (548 Bytes)
DEBUG | ??:??:?? 0 /static/maplibre-gl-BXZZhNda.js.gz (210451 Bytes)
DEBUG | ??:??:?? 0 /static/robots.txt.gz (42 Bytes)
DEBUG | ??:??:?? 0 /static/site.webmanifest.gz (197 Bytes)
[ 975][I][esp32-hal-i2c.c:75] i2cInit(): Initialising I2C Master: sda=21 scl=22 freq=100000
[ 976][I][XPowersCommon.tpp:248] begin(): SDA:21 SCL:22
[ 981][W][Wire.cpp:301] begin(): Bus already started in Master Mode.
INFO | ??:??:?? 0 AXP2101 PMU init succeeded, using AXP2101 PMU
[ 1013][D][XPowersAXP2101.tpp:2791] setInterruptImpl(): DISABLE - HEX:0xffffffff BIN:
DEBUG | ??:??:?? 1 =======================================================================
DEBUG | ??:??:?? 1 DC1 : + Voltage:3300 mV
DEBUG | ??:??:?? 1 DC2 : - Voltage:500 mV
DEBUG | ??:??:?? 1 DC3 : - Voltage:500 mV
DEBUG | ??:??:?? 1 DC4 : - Voltage:1800 mV
DEBUG | ??:??:?? 1 ALDO1: - Voltage:1800 mV
DEBUG | ??:??:?? 1 ALDO2: + Voltage:3300 mV
DEBUG | ??:??:?? 1 ALDO3: + Voltage:3300 mV
DEBUG | ??:??:?? 1 ALDO4: - Voltage:3300 mV
DEBUG | ??:??:?? 1 BLDO1: - Voltage:1800 mV
DEBUG | ??:??:?? 1 BLDO2: - Voltage:3300 mV
DEBUG | ??:??:?? 1 =======================================================================
DEBUG | ??:??:?? 1 Battery: usbPower=1, isCharging=0, batMv=0, batPct=0
INFO | ??:??:?? 1 Scanning for i2c devices...
[ 1080][W][Wire.cpp:301] begin(): Bus already started in Master Mode.
DEBUG | ??:??:?? 1 Scanning for i2c devices on port 1
DEBUG | ??:??:?? 1 I2C device found at address 0x34
INFO | ??:??:?? 1 axp192/axp2101 PMU found
DEBUG | ??:??:?? 1 I2C device found at address 0x3c
INFO | ??:??:?? 1 ssd1306 display found
INFO | ??:??:?? 1 ssd1306 display found
DEBUG | ??:??:?? 1 0x4 subtype probed in 2 tries
INFO | ??:??:?? 1 2 I2C devices found
DEBUG | ??:??:?? 1 acc_info = 0
INFO | ??:??:?? 1 Meshtastic hwvendor=4, swver=2.3.8.d490a33
DEBUG | ??:??:?? 1 Setting random seed 1335412591
DEBUG | ??:??:?? 1 Total heap: 192944
DEBUG | ??:??:?? 1 Free heap: 158660
DEBUG | ??:??:?? 1 Total PSRAM: 4192107
DEBUG | ??:??:?? 1 Free PSRAM: 4191847
DEBUG | ??:??:?? 1 NVS: UsedEntries 90, FreeEntries 540, AllEntries 630, NameSpaces 3
DEBUG | ??:??:?? 1 Setup Preferences in Flash Storage
DEBUG | ??:??:?? 1 Number of Device Reboots: 4
DEBUG | ??:??:?? 1 OTA firmware version 0.2.1.ceca52c
INFO | ??:??:?? 1 Initializing NodeDB
INFO | ??:??:?? 1 Loading /prefs/db.proto
INFO | ??:??:?? 1 Loaded /prefs/db.proto successfully
INFO | ??:??:?? 1 Loaded saved devicestate version 22, with nodecount: 1
INFO | ??:??:?? 1 Loading /prefs/config.proto
INFO | ??:??:?? 1 Loaded /prefs/config.proto successfully
INFO | ??:??:?? 1 Loaded saved config version 22
INFO | ??:??:?? 1 Loading /prefs/module.proto
INFO | ??:??:?? 1 Loaded /prefs/module.proto successfully
INFO | ??:??:?? 1 Loaded saved moduleConfig version 22
INFO | ??:??:?? 1 Loading /prefs/channels.proto
INFO | ??:??:?? 1 Loaded /prefs/channels.proto successfully
INFO | ??:??:?? 1 Loaded saved channelFile version 22
[ 1478][E][vfs_api.cpp:105] open(): /littlefs/oem/oem.proto does not exist, no permits for creation
INFO | ??:??:?? 1 File /oem/oem.proto not found
DEBUG | ??:??:?? 1 cleanupMeshDB purged 0 entries
DEBUG | ??:??:?? 1 Using nodenum 0x1fa062a0
DEBUG | ??:??:?? 1 Number of Device Reboots: 4
DEBUG | ??:??:?? 1 Expanding short PSK #1
INFO | ??:??:?? 1 Wanted region 3, using EU_868
INFO | ??:??:?? 1 Saving /prefs/db.proto
DEBUG | ??:??:?? 1 Using GPIO38 for button
DEBUG | ??:??:?? 1 SPI.begin(SCK=5, MISO=19, MOSI=27, NSS=18)
DEBUG | ??:??:?? 1 Set Timezone to GMT0
DEBUG | ??:??:?? 1 Read RTC time as 1715023705
INFO | ??:??:?? 1 Setting GPS power=1
DEBUG | ??:??:?? 1 WANT GPS=1
INFO | ??:??:?? 1 Setting GPS power=1
DEBUG | ??:??:?? 1 Using GPIO34 for GPS RX
DEBUG | ??:??:?? 1 Using GPIO12 for GPS TX
DEBUG | ??:??:?? 1 NeighborInfoModule is disabled
INFO | ??:??:?? 1 External Notification Module Disabled
INFO | ??:??:?? 1 Turning on screen
DEBUG | ??:??:?? 1 Module wants a UI Frame
DEBUG | ??:??:?? 1 RF95Interface(cs=18, irq=26, rst=23, busy=33)
INFO | ??:??:?? 1 Starting meshradio init...
DEBUG | ??:??:?? 1 (bw=250, sf=11, cr=4/5) packet symLen=8 ms, payloadSize=0, time 231 ms
DEBUG | ??:??:?? 1 (bw=250, sf=11, cr=4/5) packet symLen=8 ms, payloadSize=253, time 2115 ms
INFO | ??:??:?? 1 Radio freq=869.525, config.lora.frequency_offset=0.000
INFO | ??:??:?? 1 Set radio: region=EU_868, name=LongFast, config=0, ch=0, power=27
INFO | ??:??:?? 1 Radio myRegion->freqStart -> myRegion->freqEnd: 869.400024 -> 869.650024 (0.250000 mhz)
INFO | ??:??:?? 1 Radio myRegion->numChannels: 1 x 250.000kHz
INFO | ??:??:?? 1 Radio channel_num: 1
INFO | ??:??:?? 1 Radio frequency: 869.525024
INFO | ??:??:?? 1 Slot time: 42 msec
INFO | ??:??:?? 1 Set radio: final power level=20
DEBUG | ??:??:?? 1 Current limit set to 100.000000
DEBUG | ??:??:?? 1 Current limit set result 0
INFO | ??:??:?? 1 RF95 init result 0
INFO | ??:??:?? 1 Frequency set to 869.525024
INFO | ??:??:?? 1 Bandwidth set to 250.000000
INFO | ??:??:?? 1 Power output set to 20
INFO | ??:??:?? 1 RF95 Radio init succeeded, using RF95 radio
INFO | ??:??:?? 1 Not using WIFI
DEBUG | ??:??:?? 1 (bw=250, sf=11, cr=4/5) packet symLen=8 ms, payloadSize=237, time 2000 ms
DEBUG | ??:??:?? 2 LoRA bitrate = 118.500000 bytes / sec
INFO | ??:??:?? 2 PowerFSM init, USB power=1
DEBUG ����������*�ѕɁstate: BOOT
[ 2014][D][esp32-hal-cpu.c:244] setCpuFrequencyMhz(): PLL: 320 / 4 = 80 Mhz, APB: 80000000 Hz
DEBUG | ??:??:?? 2 [Power] Battery: usbPower=1, isCharging=0, batMv=0, batPct=0
DEBUG | ??:??:?? 2 [Screen] Screen: Started...
DEBUG | ??:??:?? 2 [GPS] Probing for GPS at 9600
INFO | ??:??:?? 3 [GPS] Found a UBlox Module using baudrate 9600
DEBUG | ??:??:?? 3 [GPS] Module Info :
DEBUG | ??:??:?? 3 [GPS] Soft version: 7.03 (45969)
DEBUG | ??:??:?? 3 [GPS] Hard version: 00040007
DEBUG | ??:??:?? 3 [GPS] Extensions:0
INFO | ??:??:?? 6 [GPS] GNSS module configuration saved!
INFO | ??:??:?? 6 [RangeTestModule] Range Test Module - Disabled
INFO | ??:??:?? 6 [PowerFSM] Initialise the NimBLE bluetooth module
INFO | ??:??:?? 6 [Screen] Done with boot screen...
DEBUG | ??:??:?? 6 [Screen] showing standard frames
DEBUG | ??:??:?? 6 [Screen] Module wants a UI Frame
DEBUG | ??:??:?? 6 [Screen] Showing 1 module frames
DEBUG | ??:??:?? 6 [Screen] Total frame count: 104
DEBUG | ??:??:?? 6 [Screen] Added modules. numframes: 1
DEBUG | ??:??:?? 6 [Screen] Finished building frames. numframes: 3
DEBUG | ??:??:?? 7 [GPS] NMEA GPS time 2024-05-06 19:28:30
DEBUG | ??:??:?? 7 [GPS] Upgrading time to quality GPS
DEBUG | 19:28:30 7 [GPS] Read RTC time as 1715023710
DEBUG | 19:28:30 7 [GPS] publishing pos@0:2, hasVal=0, Sats=0, GPSlock=0
DEBUG | 19:28:30 7 [GPS] No GPS lock
DEBUG | 19:28:30 7 [GPS] onGPSChanged() pos@0, time=1715023710, lat=0, lon=0, alt=0
INFO | 19:28:30 7 [GPS] updatePosition LOCAL pos@0, time=1715023710, latI=0, lonI=0, alt=0
DEBUG | 19:28:30 7 [GPS] Setting local position: latitude=0, longitude=0, time=1715023710, timestamp=0
DEBUG | 19:28:30 7 [GPS] Node status update: 1 online, 1 total
DEBUG | 19:28:30 7 [GPS] showing standard frames
DEBUG | 19:28:30 7 [GPS] Module wants a UI Frame
DEBUG | 19:28:30 7 [GPS] Showing 1 module frames
DEBUG | 19:28:30 7 [GPS] Total frame count: 104
DEBUG | 19:28:30 7 [GPS] Added modules. numframes: 1
DEBUG | 19:28:30 7 [GPS] Finished building frames. numframes: 3
INFO | 19:28:30 7 BLE authentication complete
INFO | 19:28:32 9 From Radio onread
INFO | 19:28:32 9 To Radio onwrite
INFO | 19:28:32 9 Client wants config, nonce=28
INFO | 19:28:32 9 Starting API client config
INFO | 19:28:32 9 From Radio onread
INFO | 19:28:32 9 getFromRadio=STATE_SEND_MY_INFO
DEBUG | 19:28:32 9 encoding toPhone packet to phone variant=3, 14 bytes
INFO | 19:28:32 9 From Radio onread
INFO | 19:28:32 9 getFromRadio=STATE_SEND_METADATA