NIIMBOT firmware collection

stable and testing directories contain original firmware images. They are not modified in any way.

Important notes:

Use only the firmware for your printer model.
Do not use different major firmware versions (for example, if you have 5.14, do not flash 6.x).
Usually major firmware version should match the major hardware version. Example: FW 4.13, HW 4.01.
Your device will be bricked if you ignore lines above. Have a nice day.

Flash with niim.blue (instructions). Everything you do is at your own risk.

/stable/B21_Pro/

File Name ↓	File Size ↓	Date ↓
Parent directory/	-	-
B21_Pro_2.25.bin.txt	240 B	2026-Sep-19 12:18
B21_Pro_2.26.bin.txt	234 B	2026-Sep-19 12:18
B21_Pro_3.07.bin.txt	267 B	2026-Sep-19 12:18
B21_Pro_3.12.bin.txt	240 B	2026-Sep-19 12:18
B21_Pro_2.23.bin.txt	240 B	2026-Sep-19 12:18
B21_Pro_3.09.bin.txt	240 B	2026-Sep-19 12:18
B21_Pro_2.21.bin.txt	266 B	2026-Sep-19 12:18
B21_Pro_2.20.bin.txt	210 B	2026-Sep-19 12:18
B21_Pro_3.13.bin.txt	234 B	2026-Sep-19 12:18
B21_Pro_3.13.bin	118.7 KiB	2026-Sep-19 12:18
B21_Pro_2.25.bin	117.3 KiB	2026-Sep-19 12:18
B21_Pro_2.26.bin	117.7 KiB	2026-Sep-19 12:18
B21_Pro_3.12.bin	118.3 KiB	2026-Sep-19 12:18
B21_Pro_2.23.bin	118.1 KiB	2026-Sep-19 12:18
B21_Pro_3.09.bin	119.9 KiB	2026-Sep-19 12:18
B21_Pro_3.07.bin	119.7 KiB	2026-Sep-19 12:18
B21_Pro_2.20.bin	115.6 KiB	2026-Sep-19 12:18
B21_Pro_2.21.bin	116.9 KiB	2026-Sep-19 12:18