Category

Other

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.x and 2.7.16

Description

Description:
Using MeshPocket with the latest firmware (v2.7.16), certain UTF-8 characters in received messages cause the device to reboot.
Root Cause Analysis:
Upon reviewing the source code in AppleFont.cpp, specifically the toUtf32 function, the issue occurs when the input text length exceeds 4. The function calls assert, which triggers a reboot.
Suggested Fix:
Replace the assert statement with:

• A serial port warning log to indicate the invalid input length.
• Return a 0 value instead of asserting, to prevent the device from rebooting.

Relevant log output