When we need the board, press the power button to restart your project. So in the field, with a battery powered project, we can conserve battery by simply pressing a button. The power button can fully turn off the board it is not a momentary switch that merely resets the SoC. That may not sound exciting straight away, but hear us out. For most of us, this is a fun feature to explore. If you are building mission critical RP2040 applications, then this is a key feature. Using these pins and another Raspberry Pi Pico as a debug host we can interactively work with the SRAM, CPU and memory mapped IO directly from our chosen development environment. These pins are used to pull data from a running RP2040 without cluttering the default UART port. Just next to the Stemma QT / Qwiic connector is a three pin JST-SH connector which breaks out the three debug pins, typically at the base of the Raspberry Pi Pico. Using our trusty MPR121 12 point capacitive touch sensor and the latest version of CircuitPython 7 for the Pico LiPo, we quickly hacked up a demo to test the Stemma QT connector.Įverything worked splendidly and we can see Stemma QT / Qwiic being adopted by many makers. Stemma QT / Qwiic is really a bespoke breakout for I2C devices, and both Adafruit and SparkFun have a slew of compatible components such as temperature sensors, screens and capacitive inputs. But what the Pico LiPo shares with Adafruit’s and SparkFun’s boards is a Stemma QT connector (Qwiic on SparkFun boards) which makes connecting compatible devices exceptionally easy. Pico LiPo shares the same GPIO as the Raspberry Pi Pico which means we get all the pins, unlike other boards such as Adafruit’s Feather RP2040. Our project can be powered via the USB C interface, but should the power drop out, it switches to battery with zero downtime. A great feature of the battery is that it can act as a basic UPS.
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