What is it?

This is my mini project on STM32. Many makers use low cost radio transmitters NRF24L01 and RFM69 in their projects. This PCB should facilitate the use of radio modules for use as transmitters in USB devices. Can also be used as a RF-dongle for Raspberry Pi. The basis of the device is the microcontroller STM32F042G6U6 in the case UFQFPN28 4x4 mm (smallest footprint controller enclosure I found on sale). It is possible to download .bin files directly via USB, thanks to the built-in bootloader. For the whole, you’ll need to connect device in USB port on while holding down the “BOOT” button. I used STM32CubeProgrammer to download .bin file. 6-pin SWD Tag-Connect is also available for debugging.

Product comes fully assembled and with enclosure. Since RFM69 is larger in size, this version DOES NOT INCLUDE RFM69! But you can solder it manually as needed (footprint available). The version with NRF24 and RFM69, but without enclosure will be available later.

What makes it special?

• NRF24L01 SMD
• RFM69 868 or 915 MHz (not included)
• No programming probe needed for uploading firmware
• Tag-Connect for debugging
• Debugging LED on board
• USB port ESD protection
• Gainta G1901C enclosure