ESP32: JTAG debugging with OpenOCD and a logic probe
Stop guessing why the firmware crashes. Set breakpoints, step through code, inspect registers, with JTAG + OpenOCD + GDB. The right tool when print debugging fails.
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#debugging
4 tutorials
ESP32: debug with a logic analyzer and protocol decoders
When the Serial.print tells you nothing, the I2C bus tells you everything. Pick a $10 clone or a $400 Saleae, install Sigrok and PulseView, decode I2C/SPI/UART.
ESP32: oscilloscope basics, what those waveforms actually mean
Read a scope like you read a multimeter. Volts per div, time per div, AC vs DC coupling, what bandwidth actually buys you, and how to measure PWM duty cycle.
ESP32: the boot button and boot pins, what they actually do
The BOOT button on most ESP32 boards is not a reset button. It puts the chip in download mode. Here is what that means and why you keep needing it.