If you have physical access to the hardware, it actually has exposed JTAG under the covers, and it's basically a Particle Photon, so I imagine you'd be able to

If you have physical access to the hardware, it actually has exposed JTAG under the covers, and it's basically a Particle Photon, so I imagine you'd be able to have a lot of fun. Actually, here's a guide: https://learn.adafruit.com/dash-hacking-bare-metal-stm32-programming/overview https://learn.adafruit.com/dash-hacking-bare-metal-stm32-pro...