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OtterPill is a 3$ STM32F072 devboard featuring USB 2.0 full-speed, a DFU Bootloader, a USB-PD Phy and Arduino nano alike pinout and size.
Changelog V1.2: BOM cost reduction by ~40%, PCB can be fully populated by JLCSMT, more efficient buck converter (PCB gets less warm at 20V), GND-hook for probing, Reset-Pin will be exposed as pad, power pads for 20V/5A
Changelog V1.2: BOM cost reduction by ~40%, PCB can be fully populated by JLCSMT, more efficient buck converter (PCB gets less warm at 20V), GND-hook for probing, Reset-Pin exposed as pad, power pads for 20V/5A
More documentation and firmware examples will be aviable soon (including pinout diagram).
More documentation and firmware examples will be aviable soon.
## Building and Flashing
### Via Arduino
@ -22,12 +22,22 @@ Or you can generate a basic firmware, with HAL init and Makefile, with CubeMX. T
![](pinout.png)
## Blank example firmware
SoonTM
## USB-PD example firmware
This is a working USB-PD example using ChibiOS, a new voltage can be requested by pressing the Button.
[https://github.com/Jan--Henrik/USB-PD-Firmware](https://github.com/Jan--Henrik/USB-PD-Firmware)
## Shields and addons
Most Arduino shields should be compatible.
#### [USB-to-CAN-adapter](https://github.com/Jan--Henrik/OtterPill-CAN-Adapter)
## Images
![](images/1.jpg)