Versions and compatibility¶

Which firmware release works with which bootloader, Python library, PAR6 runtime and board revision. One row per firmware release, newest first.

Firmware	Released	Bootloader	Spectral Micro equivalent	Python library (Spectral-BLDC)	PAR6 runtime	STEPFOC PCB	Docs
108	2026-08-26	required (installed on boards shipped with 105 or newer, and on some shipped before)	107	1.20 or newer	0.9 or newer	v1	108
107	2026-08-24	required	107, without its calibration fix (which came with STEPFOC 108)	1.20 or newer	0.9 or newer	v1	not published
106	2026-07-05	required	106	1.19 or newer	0.9 or newer	v1	not published
105	2026-07-04	required (the first release that needs it)	105	1.19 or newer	0.9 or newer	v1	not published
103	2025-12-28	none (flashed with a programming adapter)	101	1.17 or newer	0.9 or newer	v1	103

#Info prints the firmware release a driver runs; Send_Respond_Device_Info returns it over CAN.

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