Firmware Debugging
ESP32 Diagnostics and Crash Decoder
Understand the root cause of Brownout, Guru Meditation, Watchdog, and Stack Overflow crashes, and apply engineering solutions instead of workarounds.
Paste the log to see the cause
Copy the serial monitor output snippet. Diagnostics appear instantly.
Test with
Fault catalog
Symptom
Area
10 faults
Pre-deployment checklist
Essential items to validate on hardware and firmware before shipping a product.
Hardware and Power Supply
- 10 µF to 100 µF low-ESR capacitor on VCC, plus a 100 nF ceramic capacitor close to the chip.
- LDO regulator sized for 600 mA to 1 A current spikes, with adequate thermal margin.
- No external peripherals forcing logic levels on strapping pins during reset and boot.
- 10 µF or 1 µF capacitor on the EN (RST) pin for stable auto-reset flashing.
Firmware and FreeRTOS
- Every FreeRTOS task yields CPU time with vTaskDelay, queues, or semaphores.
- Every ISR marked with IRAM_ATTR with zero blocking calls.
- Avoid continuous heap reallocations using Arduino Strings in tight loops.
- Clock synchronized via SNTP before attempting TLS/HTTPS handshakes.