{"product_id":"pre-assembled-adafruit-picowbell-adalogger-for-pico-microsd-rtc-stemma-qt","title":"Pre-Assembled Adafruit PiCowbell Adalogger for Pico - MicroSD, RTC \u0026 STEMMA QT","description":"\u003cp\u003eA pre-assembled add-on for Raspberry Pi Pico (and compatibles) with microSD card socket, RTC and STEMMA QT connector.\u003c\/p\u003e\n\u003cp\u003eDing dong! Hear that? It's the PiCowbell ringing, letting you know that the new Adafruit PiCowbell Adalogger is in stock and ready to assist your Raspberry Pi Pico and Pico W project with handy hardware and datalogging.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis version comes with Pico 20-pin stacking headers pre-soldered on. \u003c\/strong\u003eWe also stock the \u003ca rel=\"noopener\" href=\"\/en-us\/products\/adafruit-picowbell-adalogger-for-pico-microsd-rtc-stemma-qt\" target=\"_blank\"\u003eunassembled version\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eThe PiCowbell Adalogger is the same size and shape as a Pico and is intended to socket underneath to make your next data logging or data reading project super easy. Micro SD card socket? Yes! \u003ca href=\"\/en-us\/collections\/stemma-qt\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eSTEMMA QT\u003c\/a\u003e \/ \u003ca href=\"\/en-us\/collections\/qwiic\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eQwiic\u003c\/a\u003e connector for fast I2C? Indeed. Real Time Clock with battery backup for accurate timekeeping? Of course!\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe PiCowbell Adalogger provides you with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRight angle JST SH connector for I2C \/ Stemma QT \/ Qwiic\u003c\/strong\u003e connection. Provides 3V, GND, IO4 (SDA), and IO5 (SCL)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicroSD card holder\u003c\/strong\u003e for adding as much storage as you could possibly want for reading or writing. Connected to SPI pins 16, 18, 19 and card select on 17. Optional card detect line can be connected to pin 15.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePCF8523 Real Time Clock with CR1220 Coin cell backup\u003c\/strong\u003e for many years of timekeeping. Set the time once using our example sketches, and then you can data-log with accurate timestamps. Uses I2C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset button \u003c\/strong\u003e- Press to restart your program\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMany pads on the Adalogger have a duplicate hole pad\u003c\/strong\u003e next to it for solder-jumpering\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe ground pads have white silkscreen rectangles\u003c\/strong\u003e to easily identify, plus one long ground strip near the reset button\u003c\/li\u003e\n\u003cli\u003eGold-plated pads for easy soldering\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf using the Philhower Arduino core, the Wire peripheral is already set up to use IO4 and IO5. If using CircuitPython or MicroPython, you'll need to let the code know to look at 4+5 for SDA+SCL pins.\u003c\/p\u003e\n\u003cp\u003eDoes not come with a micro SD card or a coin cell battery. A CR1220 coin cell is required to use the RTC battery-backup capabilities! We don't include one by default to make shipping easier for those abroad, so use any CR1220 you have handy.\u003c\/p\u003e\n\u003ch2\u003eTechnical Details\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eRevision History:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAs of October 28, 2025\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We added a breakout hole for the square wave output from the RTC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/www.adafruit.com\/includes\/templates\/shop2019\/images\/RoHS2_2011_65_EU.svg\" alt=\"RoHS 2 2011 65 EU Compliant\" width=\"145\" height=\"80\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"col-lg-2 col-md-3 col-sm-3 col-xs-4\"\u003e\u003cimg src=\"https:\/\/www.adafruit.com\/includes\/templates\/shop2019\/images\/RoHS2_2015_863_EU.svg\" alt=\"RoHS 2 2015 863 EU Compliant\" width=\"145\" height=\"80\"\u003e\u003c\/div\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":56186326942075,"sku":"ADA6355","price":10.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/files\/6355-03.jpg?v=1775145000","url":"https:\/\/shop.pimoroni.com\/en-us\/products\/pre-assembled-adafruit-picowbell-adalogger-for-pico-microsd-rtc-stemma-qt","provider":"Pimoroni Ltd","version":"1.0","type":"link"}