Badger2040 wake from sleep?

[stanelie]

CircuitPython version and board name

Adafruit CircuitPython 10.0.3 on 2025-10-17; Pimoroni Badger 2040 with rp2040

Code/REPL

# something I tried...
# INACTIVITY TIMEOUT (Only on battery)
if time.monotonic() - last_activity > INACTIVITY_TIMEOUT:
    _, is_charging = get_battery_status()
    
    if is_charging:
        print("On USB power - staying awake")
        last_activity = time.monotonic()
    else:
        print(f"DEBUG: Inactivity timeout. Saving state. Current Page: {current}")

        for btn in buttons.values():
            btn.deinit()

        button_pins = [
            board.SW_UP,
            board.SW_DOWN, 
            board.SW_A,
            board.SW_B,
            board.SW_C
        ]

        pin_alarms = [
            alarm.pin.PinAlarm(pin=pin, value=True, edge=True, pull=False) 
            for pin in button_pins
        ]
        
        print("Entering deep sleep. Press any button to wake...")
        
        alarm.exit_and_deep_sleep_until_alarms(*pin_alarms)

Behavior

Maybe not a bug, but a feature request?

The Badger2040 has a display.halt() command that puts the display to sleep (removes power from the eink display) and sets the rp2040 in deep sleep where it supposedly draws less then 1 ma. It can then be woken by a button press (any button), which resets the CPU and reloads main.py.

Is there a way to achieve this with Circuitpython? I tried some things with alarms and trying to maintain pins to the correct voltage so they can wake the device, but all failed.

I found this source code that looks like it might be something to do with the firmware? Not too sure. Here it is anyway : https://github.com/pimoroni/badger2040/blob/main/firmware/modules/wakeup/wakeup.cpp

Am I missing something? How do I achieve this?

Any help appreciated!

Description

No response

Additional information

No response

[bablokb]

With the Badger2040, you don't need a pin-alarm, everything is handled in hardware. To turn power off, drive board.EN_3V3 low. To wake up, press any button at least two seconds. Note that all of this only works when running from battery, while connected to USB, the board does not shut down.

[stanelie]

It looks like there is no board.EN_3V3 :

>>> import board
>>> dir(board)
['__class__', '__name__', 'DISPLAY', 'ENABLE_DIO', 'GP0', 'GP1', 'I2C', 'INKY_BUSY', 'INKY_CS', 'INKY_DC', 'INKY_RST', 'INT', 'MISO', 'MOSI', 'REF_1V2', 'RX', 'SCK', 'SCL', 'SDA', 'SPI', 'SW_A', 'SW_B', 'SW_C', 'SW_DOWN', 'SW_UP', 'TX', 'UART', 'USER_LED', 'USER_SW', 'VBAT_SENSE', 'VBUS_DETECT', 'VREF_POWER', '__dict__', 'board_id']
>>> 

What else can I try?

[stanelie]

I think it works with board.ENABLE_DIO.value = False.
I now need to verify what current is being drawn.

The micropython firmware only needs a short button press to wake the badger. Why is it different? It's the same hardware...

Thanks for the tip!