DFRobot Lark Weather Sensor Issue
lunarity 2026-07-01 09:30:45 65 Views1 Replies Hello, my main issue is that the sensor is not outputting any information or creating a CSV file when connected through USB.
Steps I've followed:
Power with 5V Power brick through USB C port facing south direction
Rotated weather vain 360 degrees
No LED turns on except for the initial yellow? green? from bootup.
Even after time has passed no leds flash to indicate data collection.
Connected device to PC through USB c cable, drive opens normally, no data within.
Furthermore, changes to the configuration don't appear to impact the device whatsoever.
Troubleshooting attempted:
Downloading latest firmware and flashing through RPI mode, when firmware added to folder, device goes back to normal drive mode (LARK).
Powered directly through 3.3V and GND pins instead of USB
Remove config file for regeneration (file does not self regenerate)
Unattempted:
Reformatting drive.
Reading data directly through I2C.
Please advise, thank you.
Hi,
One thing to note is that the USB-C port is mainly for configuration, data export and firmware upgrade. It does not work as a live data output port like I2C/UART, so no real-time data output through USB is expected.
For the CSV issue, I would first suggest checking the Config.txt settings instead of reformatting the drive:
Record:ON
Light_Switch:ON
Low_Power:OFF
Also check Sample_rate and Delay_record. After changing Config.txt, please safely eject the LARK drive and reboot the device, since the configuration only takes effect after restart.
If Light_Switch is ON and local recording is working, the LED should flash when data is being stored, and a CSV file should be generated after the delay/sample interval.
If it still does not generate any CSV after this, I would suggest trying I2C reading next. If I2C can read data normally, the issue is more likely related to local storage/configuration. If I2C also cannot read data, then it may be a firmware or hardware issue.
Yx 
