u8g2 crashes arduino nano esp32

[AlexSchmitz222]

Hey everyone,

I'm using an Arduino Nano ESP32, containing an ESP32-S3 together with an AZ-Delivery SH1106 I2C Display (128x64px). I'm trying to execute an Interrupt every 30sec. However, upon entering the Interrupt Routine, the ESP crashes and reboots.This happens when u8g2.sendBuffer() or any other Display related function like u8g2.clearDisplay() is called.

Is there anything I can do to fix the issue? I've already tried disabling the interrupt during the interrupt routine to no success.

A Thought: Do those functions maybe make use of float values? The ESP32-S3 has a hardware floating point unit which isn't allowed to b used during interrupts, thus crashing the device if trying to do floating point math.

[olikraus]

U8g2 doesn't use float. But maybe the watch dog of the ESP forces the reset. So you might need to extend the timeout for the watchdog.