Skip to content
Branch: master
Go to file

Latest commit


Failed to load latest commit information.
Latest commit message
Commit time


Custom firmware for the Youyue 858D+ (ATmega168/ATmega328)

There is a 'user manual' of sorts in the 'Docs' folder.

Some videos showing the progress from 'stock firmware' with massive temperature overshoot towards almost no overshoot at all.

Please note:

Although this device looks very much like ones sold by 'Atten' and others, the innards are not necessarily the same. The heater / wand are probably the same, but I know that e.g. the 'Atten 858D' uses a different mainboard with a different brand micro controller.

Naturally, this firmware will only work 'as is' for the exact mcu / mainboard combination I have. Please see the 'Docs' folder for schematic and PCB photos.

MCU-Adapter repository (optional).

FAN-speed-mod repository (optional).

Adapter PCB for clones with Samsung MCU EEVBLOG


There are currently three options available, choose your preferred environemt:

  • Use the Arduino IDE, make sure you do ISP Upload and don't use the arduino bootloader.
  • Use Atmel Studio 6 together with the VisualMicro Plugin for Arduino support, make sure you do ISP Upload and don't use the arduino bootloader.
  • "raw" text editing and Makefiles, to do so run git submodule update --init and afterwards make ispload. You probably need to adjust ISP_PROG and AVRDUDE_ARD_PROGRAMMER in the makefile.

The supplied only works together with the Makefile method.

Safety information / disclaimer:

Making any modifications to this device may cause you irreversible physical harm or worse. You do this at your own risk.

There is a significant risk of lethal electrical shock, so if you still insist of doing so, make sure to ALWAYS UNPLUG THE MAINS CABLE before dismantling the device. Check repeatedly.

If you have an isolation transformer - do use it.


CODE: Custom firmware for Youyue 858D+ (ATmega168/328P)


You can’t perform that action at this time.