Arduino for STM32

Thanks mrburnette and ag123 for the info. I am very sorry that I have not gotten a chance to respond, I have been working very hard to finish shrinking the TinyPICO. The PCB layout is done and I will get the assembled prototype in 2 weeks. See the link at PJRC forum: https://forum.pjrc.com/threads/6...

Hi All, I remember that a few years ago, there was a community effort to make a STM32F4 board in Blue Pill form factor. What is the latest information on that project? I am thinking about making a small low power L4 board as an open source project. Recently I made a Teensy 3.2 board smaller at 31mm ...