[Bug]: nRF52840 xiao bootloop when initiating bluetooth stack

[tcprado]

Category

BLE

Hardware

Other

Is this bug report about any UI component firmware like InkHUD or Meshtatic UI (MUI)?

• Meshtastic UI aka MUI colorTFT
• InkHUD ePaper
• OLED slide UI on any display

Firmware Version

2.6.11.60ec05e

Description

Device is in bootloop, can't make any changes to config, when bluetooth stack initiates it just reboots and disconnects serial.
INFO | ??:??:?? 1

//\ E S H T /\ S T / C

DEBUG | ??:??:?? 1 Filesystem files:
DEBUG | ??:??:?? 1 prefs (directory)
DEBUG | ??:??:?? 1 nodes.proto (0 Bytes)
DEBUG | ??:??:?? 1 config.proto (166 Bytes)
DEBUG | ??:??:?? 1 channels.proto (57 Bytes)
DEBUG | ??:??:?? 1 device.proto (112 Bytes)
DEBUG | ??:??:?? 1 adafruit (directory)
DEBUG | ??:??:?? 1 bond_prph (directory)
DEBUG | ??:??:?? 1 bond_cntr (directory)
DEBUG | ??:??:?? 1 Power::lipoInit lipo sensor is not ready yet
DEBUG | ??:??:?? 1 Use analog input 32 for battery level
INFO | ??:??:?? 1 Scan for i2c devices
DEBUG | ??:??:?? 1 Scan for I2C devices on port 1
INFO | ??:??:?? 1 No I2C devices found
DEBUG | ??:??:?? 1 acc_info = 0
INFO | ??:??:?? 1 S:B:88,2.6.11.60ec05e
INFO | ??:??:?? 1 Build timestamp: 1749660770
DEBUG | ??:??:?? 1 Reset reason: 0x0
DEBUG | ??:??:?? 1 Set random seed 1303147854
INFO | ??:??:?? 1 Init NodeDB
INFO | ??:??:?? 1 Load /prefs/nodes.proto
INFO | ??:??:?? 1 Loaded /prefs/nodes.proto successfully
WARN | ??:??:?? 1 NodeDatabase 0 is old, discard
DEBUG | ??:??:?? 1 Install default NodeDatabase
INFO | ??:??:?? 1 Load /prefs/device.proto
INFO | ??:??:?? 1 Loaded /prefs/device.proto successfully
INFO | ??:??:?? 1 Loaded saved devicestate version 24
INFO | ??:??:?? 1 Load /prefs/config.proto
INFO | ??:??:?? 1 Loaded /prefs/config.proto successfully
INFO | ??:??:?? 1 Loaded saved config version 24
ERROR | ??:??:?? 1 Could not open / read /prefs/module.proto
INFO | ??:??:?? 1 Install default ModuleConfig
INFO | ??:??:?? 1 Load /prefs/channels.proto
INFO | ??:??:?? 1 Loaded /prefs/channels.proto successfully
INFO | ??:??:?? 1 Loaded saved channelFile version 24
ERROR | ??:??:?? 1 Could not open / read /prefs/uiconfig.proto
DEBUG | ??:??:?? 1 cleanupMeshDB purged 0 entries
DEBUG | ??:??:?? 1 Use nodenum 0xb4b4716a
INFO | ??:??:?? 1 Adding node to database with 1 nodes and 161776 bytes free!
DEBUG | ??:??:?? 1 Expand short PSK #1
INFO | ??:??:?? 1 Wanted region 0, using UNSET
DEBUG | ??:??:?? 1 Coerce telemetry to min of 30 minutes on defaults
DEBUG | ??:??:?? 1 Save to disk 0
DEBUG | ??:??:?? 1 Use compiled/slipstreamed tzplaceholder
DEBUG | ??:??:?? 1 Set Timezone to GMT0
DEBUG | ??:??:?? 1 NeighborInfoModule is disabled
INFO | ??:??:?? 1 External Notification Module Disabled
DEBUG | ??:??:?? 1 SX126xInterface(cs=4, irq=1, rst=2, busy=3)
DEBUG | ??:??:?? 1 SX126X_DIO3_TCXO_VOLTAGE defined, using DIO3 as TCXO reference voltage at 1.800000 V
INFO | ??:??:?? 1 Start meshradio init
INFO | ??:??:?? 1 Radio freq=906.875, config.lora.frequency_offset=0.000
INFO | ??:??:?? 1 Set radio: region=UNSET, name=LongFast, config=0, ch=19, power=30
INFO | ??:??:?? 1 myRegion->freqStart -> myRegion->freqEnd: 902.000000 -> 928.000000 (26.000000 MHz)
INFO | ??:??:?? 1 numChannels: 104 x 250.000kHz
INFO | ??:??:?? 1 channel_num: 20
INFO | ??:??:?? 1 frequency: 906.875000
INFO | ??:??:?? 1 Slot time: 28 msec
INFO | ??:??:?? 1 Final Tx power: 30 dBm
INFO | ??:??:?? 1 SX126x init result 0
INFO | ??:??:?? 1 Frequency set to 906.875000
INFO | ??:??:?? 1 Bandwidth set to 250.000000
INFO | ??:??:?? 1 Power output set to 22
DEBUG | ??:??:?? 1 Current limit set to 140.000000
DEBUG | ??:??:?? 1 Current limit set result 0
DEBUG | ??:??:?? 1 Set DIO2 as RF switch, result: 0
DEBUG | ??:??:?? 1 Use MCU pin 5 as RXEN and pin -1 as TXEN to control RF switching
INFO | ??:??:?? 1 Set RX gain to boosted mode; result: 0
INFO | ??:??:?? 1 SX1262 init success
DEBUG | ??:??:?? 1 LoRA bitrate = 118.394310 bytes / sec
INFO | ??:??:?? 1 PowerFSM init, USB power=1
DEBUG | ??:??:?? 1 State: BOOT
DEBUG | ??:??:?? 1 [Power] Battery: usbPower=0, isCharging=0, batMv=3733, batPct=51
INFO | ??:??:?? 1 [RangeTest] Range Test Module - Disabled
INFO | ??:??:?? 4 [PowerFSM] Loss of power in Powered
INFO | ??:??:?? 4 [PowerFSM] Loss of power in Powered
DEBUG | ??:??:?? 4 [PowerFSM] Init NRF52 Bluetooth
WARNING file:stream_interface.py __reader line:207 Meshtastic serial port disconnected, disconnecting... ClearCommError failed (PermissionError(13, 'The device does not recognize the command.', None, 22))

Relevant log output

[ndoo]

Are you sure this isn't a brownout due to insufficient voltage during a 1W Tx?