09 DIO - geo-tp/ESP32-Bus-Pirate GitHub Wiki
This mode allows full manual control of any GPIO pin on the ESP32.
Use it to read, write, sniff, or generate PWM signals on individual pins.
It’s useful for testing, probing and debugging.
| Command | Description |
|---|---|
read <pin> |
Read the current digital state of a pin (returns 0 or 1) |
set <pin> <H/L/I/O> |
Set the pin mode or level: H=HIGH, L=LOW, I=INPUT, O=OUTPUT |
pullup <pin> |
Configure the pin as INPUT with internal pull-up resistor |
sniff <pin> |
Monitor the pin and log level transitions until you press [ENTER] |
pwm <pin> <freq> <duty> |
Generate a PWM signal on the pin (duty in %) |
toggle <pin> <ms> |
Toggle the pin state every ms until ENTER is pressed |
reset <pin> |
Reset the pin: detach PWM, set to INPUT with no pull-up |
- All pin numbers must be valid GPIOs.
- PWM uses
ledcWrite()and supports 8-bit resolution (0–255). -
sniffwill log every rising/falling edge of the pin. -
resetalso detaches any PWM channel previously attached.
mode dio
read 21 # Print digital level on GPIO 21
set 21 O # Set GPIO 21 as OUTPUT
set 21 H # Set GPIO 21 to HIGH
set 21 high # Set GPIO 21 to HIGH
set 21 low # Set GPIO 21 to LOW
pullup 19 # Enable internal pull-up on GPIO 19
sniff 22 # Monitor GPIO 22 transitions
pwm 5 1000 75 # Output PWM at 1kHz, 75% duty on GPIO 5
toggle 1 100 # Toggle pin 1 every 100ms
reset 5 # Reset pin 5 to neutral state