Raspberry Pi Pico Deep Sleep

[Andreas]

Einleitung

Ausgehend von Low-power ESP32 boards - #30 by Andreas schauen wir uns hier die Deep Sleep Fähigkeiten des RP2040 bzw. entsprechender Boards an.

• Raspberry RP2 microcontroller family
• Raspberry Pi Pico
• Raspberry Pi Pico W and Pico WH

Ressourcen

• Raspberry Pi Pico - how to lower power consumption - Raspberry Pi Stack Exchange
• https://www.heise.de/blog/Sleepy-Pico-ein-Raspberry-Pi-Pico-geht-mit-C-C-schlafen-6046517.html
• https://www.youtube.com/watch?v=05o5QOZkpwg
• Power saving on the pi pico - Raspberry Pi Forums

Quotes

@ghubcoder

The Raspberry Pico was released in Jan 2021, and retails for around $4. It has a Dual-core Arm Cortex-M0+ processor (RP2040), flexible clock running up to 133 MHz and 264KB internal RAM.

This is a short overview of how you might reduce the power consumption of your Pico to a very low level, around 1.3mA at 25c according to the official datasheet.

– Awaking the Raspberry Pico from deep sleep

@datasheet; p. 15

3.1.4. SLEEP mode

The final example uses the hello_sleep binary code, which puts RP2040 into SLEEP mode, a low power state which leaves some clock infrastructure in the chip turned on (which is not the case in the lower-power DORMANT mode).

@datasheet; p. 14

3.1.3. DORMANT mode

This use-case employs the hello_dormant binary which puts RP2040 into DORMANT mode, a very low-power state.

[Andreas]

@datasheet; p. 14

3.1.3. DORMANT mode

This use-case employs the hello_dormant binary which puts RP2040 into DORMANT mode, a very low-power state.

Nach dem DORMANT mode müssen wir wohl schauen, aber der hat immer noch 0.8mA. Liegt das am Board oder am Chip?

[Andreas]

@Andreas

Der “dormant” mode hat immer noch 0.8mA. Liegt das am Board oder am Chip?

Das hier scheint die interessanteste Diskussion zu diesem Thema zu sein.

@kadamski

If you come from the SBC world, the power consumption of the RP2040 seems great and you feel like it can work on a battery forever (compared to RPI, for example). If, on the other hand, you come from the microcontroller world, the 180uA in dormant mode seems very high - like at least one order of magnitude to high and basically prevents this chip from being used in a whole class of applications where battery life is of a great importance.

– Current consumption on sleep modes - Raspberry Pi Forums

Und noch zwei nette Anleitungen mit dem RP2040 und dem DS3231.

@ghubcoder

This demo has shown how it’s possible to awaken the Raspberry Pico using an external trigger, in this case a DS3231. Using a single AA battery would allow the Pico to sleep for approximately 104 days (0.8mA consumption in dormant mode, 2000mAh battery capacity in ideal conditions).

– Awaking the Raspberry Pico from deep sleep
– Waking the Pico with an external trigger

Hier noch zwei weiterführende Diskussionen bei der Arduino HAL Implementierung für den Pico.

• Low Power Modes · Issue #345 · earlephilhower/arduino-pico · GitHub
• Power-saving possibilities using the arduino-pico core · earlephilhower/arduino-pico · Discussion #1544 · GitHub