Category
Hardware Compatibility, Other
Hardware
Heltec V3
Is this bug report about any UI component firmware like InkHUD or Meshtatic UI (MUI)?
Firmware Version
2.6.4.b89355f
Description
Environment
Device: Meshtastic Heltec v3 (ESP32-based)
Sensor: Adafruit Sensirion SHT45 (I²C)
Wiring:
SCL → Pin 42
SDA → Pin 41
VCC → 3.3V
GND → GND
Symptoms:
Sensor readings return nan% (humidity) and nan℃ (temperature)
No valid data received
Expected Behavior
The SHT45 should report valid temperature and humidity readings when queried over I²C.
Actual Behavior
The sensor fails to provide valid data, returning NaN (Not a Number) values instead.
Troubleshooting Steps Taken
Checked wiring connections (ensured no loose connections, correct pin assignments).
Verified power supply (3.3V is stable, GND is properly connected).
Tested with a different microcontroller ESP-32 C6 to confirm the sensor works.
Relevant log output
ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x1 (POWERON),boot:0x28 (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:1
load:0x3fce3808,len:0x4bc
load:0x403c9700,len:0xbd8
load:0x403cc700,len:0x2a0c
entry 0x403c98d0
���@�INFO | ??:??:?? 0
//\ E S H T /\ S T / C
INFO | ??:??:?? 0 Booted, wake cause 0 (boot count 1), reset_reason=reset
DEBUG | ??:??:?? 0 Filesystem files (909312/1572864 Bytes):
DEBUG | ??:??:?? 0 /prefs/channels.proto (57 Bytes)
DEBUG | ??:??:?? 0 /prefs/config.proto (201 Bytes)
DEBUG | ??:??:?? 0 /prefs/device.proto (114 Bytes)
DEBUG | ??:??:?? 0 /prefs/module.proto (100 Bytes)
DEBUG | ??:??:?? 0 /prefs/nodes.proto (557 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-b9vwykds.js.gz (222120 Bytes)
DEBUG | ??:??:?? 0 /static/index-wV0rbIjU.css.gz (16573 Bytes)
DEBUG | ??:??:?? 0 /static/index.html.gz (547 Bytes)
DEBUG | ??:??:?? 0 /static/mapbox-gl-DY02hNYD.js.gz (391221 Bytes)
DEBUG | ??:??:?? 0 /static/maplibre-gl-H6mDd47p.js.gz (210429 Bytes)
DEBUG | ??:??:?? 0 /static/robots.txt.gz (42 Bytes)
DEBUG | ??:??:?? 0 /static/site.webmanifest.gz (197 Bytes)
[ 779][I][esp32-hal-i2c.c:75] i2cInit(): Initialising I2C Master: sda=41 scl=42 freq=100000
[ 793][I][esp32-hal-i2c.c:75] i2cInit(): Initialising I2C Master: sda=17 scl=18 freq=100000
DEBUG | ??:??:?? 0 Power::lipoInit lipo sensor is not ready yet
DEBUG | ??:??:?? 0 Use analog input 1 for battery level
INFO | ??:??:?? 0 ADC config based on Two Point values and fitting curve coefficients stored in eFuse
INFO | ??:??:?? 0 Scan for i2c devices
[ 827][W][Wire.cpp:301] begin(): Bus already started in Master Mode.
DEBUG | ??:??:?? 0 Scan for I2C devices on port 2
[ 887][E][Wire.cpp:513] requestFrom(): i2cRead returned Error -1
INFO | ??:??:?? 0 SHT31 found at address 0x44
[ 901][W][Wire.cpp:301] begin(): Bus already started in Master Mode.
DEBUG | ??:??:?? 0 Scan for I2C devices on port 1
DEBUG | ??:??:?? 0 0x2 subtype probed in 2 tries
INFO | ??:??:?? 0 2 I2C devices found
DEBUG | ??:??:?? 0 acc_info = 0
INFO | ??:??:?? 0 S:B:43,2.6.4.b89355f
INFO | ??:??:?? 0 Build timestamp: 1743283504
DEBUG | ??:??:?? 0 Total heap: 294672
DEBUG | ??:??:?? 0 Free heap: 257196
DEBUG | ??:??:?? 0 Total PSRAM: 0
DEBUG | ??:??:?? 0 Free PSRAM: 0
DEBUG | ??:??:?? 0 NVS: UsedEntries 172, FreeEntries 458, AllEntries 630, NameSpaces 9
DEBUG | ??:??:?? 0 Setup Preferences in Flash Storage
DEBUG | ??:??:?? 0 Number of Device Reboots: 5
INFO | ??:??:?? 0 BLE OTA firmware version 0.3.0.87f0f2f
INFO | ??:??:?? 0 No WiFi OTA firmware available
INFO | ??:??:?? 0 Init NodeDB
[ 997][E][vfs_api.cpp:105] open(): /littlefs/static/static does not exist, no permits for creation
[ 1015][E][vfs_api.cpp:105] open(): /littlefs/prefs/db.proto does not exist, no permits for creation
INFO | ??:??:?? 1 Load /prefs/nodes.proto
INFO | ??:??:?? 1 Loaded /prefs/nodes.proto successfully
INFO | ??:??:?? 1 Loaded saved nodedatabase version 24, with nodes count: 2
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
INFO | ??:??:?? 1 Load /prefs/module.proto
INFO | ??:??:?? 1 Loaded /prefs/module.proto successfully
INFO | ??:??:?? 1 Loaded saved moduleConfig version 24
INFO | ??:??:?? 1 Load /prefs/channels.proto
INFO | ??:??:?? 1 Loaded /prefs/channels.proto successfully
INFO | ??:??:?? 1 Loaded saved channelFile version 24
[ 1204][E][vfs_api.cpp:105] open(): /littlefs/prefs/uiconfig.proto does not exist, no permits for creation
ERROR | ??:??:?? 1 Could not open / read /prefs/uiconfig.proto
DEBUG | ??:??:?? 1 cleanupMeshDB purged 0 entries
DEBUG | ??:??:?? 1 Use nodenum 0xb03b92b4
DEBUG | ??:??:?? 1 Number of Device Reboots: 5
DEBUG | ??:??:?? 1 Expand short PSK #1
INFO | ??:??:?? 1 Wanted region 3, using EU_868
DEBUG | ??:??:?? 1 Coerce telemetry to min of 30 minutes on defaults
DEBUG | ??:??:?? 1 Save to disk 4
DEBUG | ??:??:?? 1 Opening /prefs/device.proto, fullAtomic=1
INFO | ??:??:?? 1 Save /prefs/device.proto
DEBUG | ??:??:?? 1 Use GPIO00 for button
DEBUG | ??:??:?? 1 SPI.begin(SCK=9, MISO=11, MOSI=10, NSS=8)
DEBUG | ??:??:?? 1 Use compiled/slipstreamed tzplaceholder
DEBUG | ??:??:?? 1 Set Timezone to GMT0
DEBUG | ??:??:?? 1 Read RTC time as 1
DEBUG | ??:??:?? 1 Start multicast thread
DEBUG | ??:??:?? 1 NeighborInfoModule is disabled
DEBUG | ??:??:?? 1 Rescan for I2C keyboard
DEBUG | ??:??:?? 1 Scan for I2C devices on port 2
DEBUG | ??:??:?? 1 Scan address 0x1f
DEBUG | ??:??:?? 1 Scan address 0x55
DEBUG | ??:??:?? 1 Scan address 0x5a
DEBUG | ??:??:?? 1 Scan address 0x5f
DEBUG | ??:??:?? 1 Scan for I2C devices on port 1
DEBUG | ??:??:?? 1 Scan address 0x1f
DEBUG | ??:??:?? 1 Scan address 0x55
DEBUG | ??:??:?? 1 Scan address 0x5a
DEBUG | ??:??:?? 1 Scan address 0x5f
INFO | ??:??:?? 1 External Notification Module Disabled
INFO | ??:??:?? 1 Turn on screen
DEBUG | ??:??:?? 1 haveGlyphs=1
DEBUG | ??:??:?? 1 waypoint wants a UI Frame
DEBUG | ??:??:?? 1 canned wants a UI Frame
DEBUG | ??:??:?? 1 SX126xInterface(cs=8, irq=14, rst=12, busy=13)
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=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 myRegion->freqStart -> myRegion->freqEnd: 869.400024 -> 869.650024 (0.250000 MHz)
INFO | ??:??:?? 1 numChannels: 1 x 250.000kHz
INFO | ??:??:?? 1 channel_num: 1
INFO | ??:??:?? 1 frequency: 869.525024
INFO | ??:??:?? 1 Slot time: 28 msec
INFO | ??:??:?? 1 Set radio: final power level=22
INFO | ??:??:?? 1 SX126x init result 0
INFO | ??:??:?? 1 Frequency set to 869.525024
INFO | ??:??:?? 1 Bandwidth set to 250.000000
INFO | ??:??:?? 1 Power output set to 22
Category
Hardware Compatibility, Other
Hardware
Heltec V3
Is this bug report about any UI component firmware like InkHUD or Meshtatic UI (MUI)?
Firmware Version
2.6.4.b89355f
Description
Environment
Device: Meshtastic Heltec v3 (ESP32-based)
Sensor: Adafruit Sensirion SHT45 (I²C)
Wiring:
SCL → Pin 42
SDA → Pin 41
VCC → 3.3V
GND → GND
Symptoms:
Sensor readings return nan% (humidity) and nan℃ (temperature)
No valid data received
Expected Behavior
The SHT45 should report valid temperature and humidity readings when queried over I²C.
Actual Behavior
The sensor fails to provide valid data, returning NaN (Not a Number) values instead.
Troubleshooting Steps Taken
Checked wiring connections (ensured no loose connections, correct pin assignments).
Verified power supply (3.3V is stable, GND is properly connected).
Tested with a different microcontroller ESP-32 C6 to confirm the sensor works.
Relevant log output