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STEMMA SUNDAY – Using Mu to plot sensor data with MCP2221 USB to I2C converter – @sparkfun @seeedstudio @dfrobotcn #qwiic #grove #gravity #stemma #stemmaQT

Posting this today since we had to watch Watchmen.

This weekend, we finished adding Blinka support for the low-cost MCP2221 USB to I2C/ADC/GPIO converter (video). This demo shows using Mu to plot sensor data with no microcontroller programming – we run Python natively on the PC, reading the sensor data through the USB/I2C converter. We think this could be really powerful when you want to do datalogging or analysis on a powerful computer, as there’s no intermediary. We have 200+ CircuitPython libraries, and many are I2C-compatible sensors 🙂


Stemma Stemmaqt-1

Adafruit STEMMA & STEMMA QT Plug & play connectivity

WHAT IS STEMMA? STEMMA is not an original idea, we’re working within an ecosystem of many other plug and play systems. We started STEMMA in 2014, and intended to be compatible with Grove only (cause that’s all that existed at the time) but then when Qwiic came around in 2017, added a smaller connector so we could work with those parts too!

STEMMA attempts to be as cross-compatible as possible with both Grove and Gravity (compatible connectors & 3-5V power/logic). STEMMA QT is cross-compatible with Qwiic - STEMMA QT connector/cable is same as Qwiic. You can use STEMMA QT devices with Qwiic devices/controllers.

Adafruit STEMMA & STEMMA QT: Plug & play connectivity – learn.adafruit.com If you’re lookin for the differences between each and what works (and what does not), skip to the comparison page and if we missed anything, post in the comments!

More STEMMA & STEMMA Sunday! – Adafruit.


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