Resolving Flight Controller Initialization Failure Due to Barometer Errors

I. Symptoms

• CoreWing F405 WING V2 flight controller connected to Mission Planner ground control station (GCS),

• Message bar shows barometer error: Config Error: Baro: unable to initialise driver,

• This indicates that the flight controller failed to initialize the barometer driver during startup.

• CoreWing F405 WING V2 flight controller connected to CoreWing APP

• Status overview cannot obtain flight controller information, flight controller message shows barometer error:

Config Error: Baro: unable to initialise driver

II. Cause Analysis

Symptom 1: Incorrect flight controller firmware flashed

Accidentally flashed CoreWing F405 WING V2 with ArduPilot firmware from other brands (such as SpeedyBee, Matek), causing the barometer on the flight controller to not work properly.

This is because:

• CoreWing F405 WING V2 uses a SPA-06 model barometer, which may differ from the barometer models used by other flight controller brands.

• If incompatible firmware is flashed, the flight controller will be unable to properly initialize the barometer module during startup.

Symptom 2: SDA and SCL pins touching each other

Due to reasons such as bent pins, misaligned ribbon cable insertion, or foreign object residue, the SDA and SCL pins come into contact or short circuit,

causing I²C bus communication issues, preventing the barometer from being properly recognized or initialized

• SDA and SCL pins shorted

Symptom 3: SCL and SDA pads bridged

Excessive solder during bridged the SCL and SDA pads, causing I²C bus communication issues, resulting in improper barometer functionality

CoreWing F405 WING V2:

• Solder bridging on SDA and SDA pads:

III. Solutions

Solution for Symptom 1: Reflash CoreWing F405 WING V2 firmware

Important

CoreWing F405 WING V2 常用固件下载：https://docs.corewing.com/plane/software/common-software/corewing-software-and-firmware-downloads.html

Important

※ 确保飞控已进入 DFU 模式。

Important

※ 须确保所刷写的 AP 固件文件后缀为 .hex（否则无法刷写）。

The operation steps are the same as the local INAV firmware flashing process:

1. Enter the firmware flashing page and open INAV 地面站, then enter the Firmware Flasher page.

2. Click Full Chip Erase to perform a full erase.

3. Click Load Firmware, browse the local file system, and select the target firmware that has been downloaded.

4. Click Flash Firmware to start flashing the firmware.

Important

For more information on how to update flight controller firmware, please refer to: https://docs.corewing.com/plane/beforetuning/inav-fw-update.html

https://docs.corewing.com/plane/beforetuning/mp-fw-update.html

Solution for Symptom 2: Restore SDA and SCL pins to correct position

Important

Please power off the flight controller before performing this operation!!!

• Use tweezers to gently straighten the SDA and SCL pins, check for any poor contact or loose pins, and ensure they are restored to the correct position

Solution for Symptom 3: Remove excess solder from SDA and SDA pads

Important

Please power off the flight controller before performing this operation!!!

• Remove the solder from the SDA and SCL pads.

IV. Verification

• Connect to the ground control station and check if the barometer error still displays

• Connect to CoreWing APP to check if flight controller information is displayed and if there are any error messages

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