Pre-Compiled Firmware for Default Pins

Important

This is the recommended method of getting the firmware if you don't need custom config or pin defines.

Required Tools

You only need the following if you are using precompiled firmware:

nRF Connect for Desktop (Programmer) for flashing Nordic or eByte Dongles only
nRF Connect for Desktop (Serial Terminal) for sending commands to your Receiver/Trackers, see alternatives
Or SmolSlimeConfigurator, an all-in-one programming and configuration tool for your Smol Slimes.
SlimeVR Server
- 0.13.2 or later version

Option	Values	Meaning	Recommended
Protocol	SPI/I2C	Communication method between the microcontroller and IMU sensor. SPI: Generally faster and more reliable. I2C: Less efficient and is highly discouraged.	SPI
Clock	On/Off	Whether the attached IMU uses an external clock. ✅ = External clock present. ✖️ = Internal clock only.	✅ (When hardware supports external clock)
Sleep (WOM)	✅/✖️	WOM stands for Wake-On-Motion mode. ✅ = Tracker can sleep and wake on motion. Extends battery life. ✖️ = Always active. Less drift, better tracking, at the expense of battery life. In both cases, the tracker enters deep sleep after 5 minutes of losing connection to the receiver.	✖️ (Unless battery life is the absolute highest priority)
SW0 Enabled (button)	N/A	Firmware compiled with button support. Allows physical button input for tracker control.	If your hardware has a button.
SW0 Disabled (no button)	N/A	Firmware compiled without button support. No functionality assigned to physical button presses.	Non-standard option.

Device	Protocol	Clock (ICM)	Sleep (WOM) Wake On Motion.	SW0 Disabled (no button)	SW0 Enabled (button)
ProMicro	SPI	✅	✅	N/A	Link
	SPI		✖️	N/A	Link ^{✅ recommended}
	I2C		✅	N/A	Link
	I2C		✖️	N/A	Link
ProMicro	SPI	✖️	✅	N/A	Link
	SPI		✖️	N/A	Link
	I2C		✅	N/A	Link
	I2C		✖️	N/A	Link

Device	Protocol	Clock (ICM)	Sleep (WOM) Wake On Motion.	SW0 Disabled (no button)	SW0 Enabled (button)
ProMicro	SPI	✖️	✅	Link	Link
		✖️	✖️	Link	Link
		✅	✅	Link	Link
		✅	✖️	Link	Link
	I2C	✖️	✅	Link	Link
		✖️	✖️	Link	Link
		✅	✅	Link	Link
		✅	✖️	Link	Link
XIAO	I2C/SPI	✖️	✅	Link	Link
		✖️	✖️	Link	Link
		✅	✅	Link	Link
		✅	✖️	Link	Link
R3	I2C	✅	✅	Link	N/A
R3	I2C	✅	✖️	Link	N/A
Butterfly (P1)	I2C	✅	✅	Link	N/A
Butterfly (P1)	I2C	✅	✖️	Link	N/A
Butterfly (P2)	I2C	✅	✅	Link	N/A
Butterfly (P2)	I2C	✅	✖️	Link	N/A
Butterfly (P3, R6)	I2C	✅	✖️	Link	N/A
Butterfly (P3, R7)	I2C	✅	✖️	Link	N/A
Butterfly (P4, R8)	SPI	✅	✖️	N/A	Link
Butterfly (P4, R9)	SPI	✅	✖️	N/A	Link

Device	Protocol	Clock (ICM)	Sleep (WOM) Wake On Motion.	SW0 Disabled (no button)	SW0 Enabled (button)
Chrysalis	SPI	✅	✅	N/A	Link
Chrysalis	SPI	✅	✖️	N/A	Link

Created by Shine Bright ✨, Depact and Seneral