#stemmaqt — Public Fediverse posts

Home Automation Controller #TindieBlog #HomeAutomation #ESP32 #AirQuality #GardenMonitoring #HomeAssistant #StemmaQT #Qwiic
https://blog.tindie.com/2025/08/home-automation-controller/

ADS1115 ADC in Qwiic/Stemma QT Form #TindieBlog #ADS1115 #HighResolution #ADC #Qwiic #StemmaQT #LowPower
https://blog.tindie.com/2025/07/ads1115-adc-in-qwiic-stemma-qt-form/

Qwiic/Stemma QT Constant Current Driver #TindieBlog #Qwiic #StemmaQT #ConstantCurrent #LED #Driver #Laser #I2C
https://blog.tindie.com/2025/07/qwiic-stemma-qt-constant-current-driver/

I2C Shim for RasPi Pico #TindieBlog #StemmaQT #Qwiic #I2C #Breakout #Pico
https://blog.tindie.com/2025/05/i2c-shim-for-raspi-pico/

I'm trying to attach a #DFRobot #Gravity accessory to a #RaspberryPi2040 through #StemmaQT (with the #Adafruit #JSTPH to #JSTSH adapter cable). When I connect it, the #Pi shuts off. I also have problems with the same cable and a StemmaQT accessory if I try to run it off a #Firebeetle #ESP32. I feel like I'm #DoingItWrong.

This new "Dynamic NFC Tag" board from #SparkFun looks pretty neat. Acts like a programmable NDEF NFC for use w/ iPhone & Android and has chainable Qwiic / StemmaQT I2C connectors https://www.sparkfun.com/products/21274
#NFC #NDEF #qwiic #StemmaQT #RFID

Here’s a weird side-ish project of mine. A STM32G0 as a coprocessor for #CircuitPython over #StemmaQT. I hope to get this polished up when CP 8 is in release candidate.

For the programmable #stemmaQT friend I was originally thinking of an fpga like the Mach xo2 (because it can be loaded over i2c). However, small arm chips are much cheaper and more available. Right now, I’m prototyping with an STM32G0 that is 80 cents in singles from LCSC. It has 8k ram and 32k flash. Most importantly, it has a ROM i2c bootloader! So, hopefully this’ll be a simple arm core complement to something running #CircuitPython.

This baby monitor project has re-surfaced an idea I had for a programmable #StemmaQT board. It’d be an easy way to add a core or peripheral outside of a main #CircuitPython controller. The main code would load a small set of custom code (in this case to monitor the LEDs and press the buttons) over i2c and then talk to it over i2c. Basically, in this case it’s an up expander but it can be used for other things.

The Connector Zoo: I2C Ecosystems - I2C is a wonderful interface. With four wires and only two GPIOs, you can connect ... - https://hackaday.com/2022/05/04/the-connector-zoo-i2c-ecosystems/ #microcontrollers #ecosystems #featured #interest #stemmaqt #how-to #i2cbus #stemma #grove #qwiic #i2c #jst

Quick-Swap Socket For Stemma QT Experiments - [kmatch98] shares a quick hack with us over at Hackaday.io – a 3D-printed socket f... - https://hackaday.com/2022/04/04/quick-swap-socket-for-stemma-qt-experiments/ #hotswapsockets #mischacks #stemmaqt #stemma #i2c #jst