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Welcome to STM32 circle

TapNLink Primer for STM32 instant mobile connectivity and HMI. PRIMER Connects STM32 to Mobiles

Discover the ease adding NFC, Bluetooth Low Energy (BLE) and WiFi (ESP32) to any STM32 application without redesigning hardware or recoding firmware. Create Human-Machine Interfaces (HMI) for your application that run as mobile apps (Android, iOS). View data on mobiles, or modify specific variables from your HMI app. You can even log data automatically to a Cloud platform.

No Coding. Just connect & configure!

Your connected proof-of-concept is just minutes away. TapNLink Primer uses your STM32's SWD port so that you can create a connected version of your application and automatically generate your first mobile apps (APK or IPA formats).

Learn more...

- Visit for free software downloads and documentation
- Check out the STM32 HMI video demo to see how easy TapNLink is
- Learn about special STM32 features like wireless debugging with Ride7


Note: STM32circle Projects & Resources Remain Online

The stm32circle forums are closed, however forum content, resources and projects remain online.

Documents and projects for EvoPrimer, Open4 Primer, STM32 Primer2 and STM32 Primer1 can be downloaded without an account of login.


20 last projects
Date Title Category Hw version Downloads
2015-04-20 MathGame 1 game All 666
2014-04-20 at command electronic 904
2014-04-16 STM32F207VFT6 electronic 363
2014-04-11 Inertial Center for Primer2 1.0.1 other Primer2 236
2014-06-04 ZP Video Player Design Contest 2013 other EvoPrimer 520
2014-03-17 SmartOpen4 1.0 electronic EvoPrimer 597
2014-03-20 RoboWarz 2.0 game EvoPrimer 251
2013-12-19 Christmas 1.0 game All 264
2013-10-07 DMA2D-TR 1.0 resource EvoPrimer 713
2013-10-07 Space 2D game EvoPrimer 316
2013-10-07 DMA2D-Demo 1.0 resource EvoPrimer 963
2013-08-04 uKOS-II 3.0.1 other 318
2013-07-26 Filesystem demo 1.0 resource All 403
2013-10-07 Cx_Demo 1.0 resource All 278
2013-07-24 STM32F407 - Camera 1.0 other EvoPrimer 3085
2015-04-20 GPS 1 game All 868
2013-07-24 Fast Chart 1.9 other All 438
2013-01-07 EvoPrimer Tutorial (Cubic) 3.0 resource EvoPrimer 387
2012-06-14 CHIP8 emulator v1 game EvoPrimer 302
2012-05-17 Space Invaders 10.1 game Primer2 641
Latest NEWS

Learn More about TapNLink at NFC Open Forum

Join us for the free online event and learn more about NFC 3-Stroke Configuration for HVAC and home appliances!
Demo Video

TapNLink Wins NFC Innovation Award

NFC 3-Stroke configuration provides instant HMI apps for HVAC systems!
Demo Video

Primer for NFC-BLE-WiFi at Digi-Key
Primer evaluation kit adds WiFi (ESP32), BLE or NFC to your STM32 application. Automatically generate Android and iOS apps that interface with your design.
Available Worldwide!

Ride7 Wireless Debugger/Programmer

Ride7 / RKit-ARM use TapNLink wireless modules to program and debug STM32 over wireless.
Demo Video


Latest versions of Ride7 & RKit-ARM offer wireless debugging of STM32.