About this component
Pressing it restarts the firmware. Together with BOOT it gives manual entry to download mode (hold BOOT, tap EN). The EN line also has an RC delay and is driven by the auto-program transistors, so a leaky capacitor or transistor here can keep the module stuck in reset.
What it does on this board
Resets the ESP32.
Pinout & readings
No pinout or reference readings yet — these show what each pin does and what a healthy part should measure.