draiget / whatsminer-fakefan

Emulate working fans for liquid cooling purposes

Whatsminer Fake Fan

This script emulates fan speed values for cgminer and system (all that reading speed by /sys/class/fanspeed/ path)

Installation

As a zero step you need to be able to edit system files, if you never run mount -o remount,rw / command, you should do this. That makes you able to write to ASIC filesystem, by default it is read only.

As an init.d script

1. Copy fake_fan_initd from repo to the ASIC filesystem to /etc/init.d/ directory using scp (for example scp fake_fan_initd 192.168.1.120:/etc/init.d/fakefan).
2. Run chmod +x /etc/init.d/fakefan.
3. Execute script /etc/init.d/fakefan manually or reload ASIC. Script will not start automatically after putting it to the /etc/init.d/ folder.

As a boot script part

1. Place fake_fan.sh from this repository to the remote asic /etc folder. You can run scp in case if you are using MacOS or another Unix system.
2. Then you need to give yourself a permissions for writing to /etc/init.d/boot, just run: chmod +w /etc/init.d/boot
3. Run following command:

sed -i.back -e 's|reload_config|reload_config\n\texec /etc/fake_fan.sh|g' /etc/init.d/boot

That basically will add exec /etc/fake_fan.sh to the end of boot() { function which is located in main /etc/init.d/boot. 4. That's all, now you can reboot cgminer (kill -9 cgminer) and check it out.

Note

With this emulation intake and outtake (both), fans can be disconnected, there's no any checks that fans are installed, only cgminer will check the speeds of fans and prevent miner from starting without working fans.

Feel free to contact me through issues.

whatsminer-fakefan's Issues

Fan detect speed error

I've done everything as described, rooted the system, (running on latest firmware). using the init.d
I get this
110 | Fan in detect speed error | 2021-06-06 15:51:32
111 | Fan out detect speed error | 2021-06-06 15:51:32
130 | Fan in speed error, percent: 0, speed: 6000 | 2021-06-06 15:51:14
131 | Fan out speed error, percent: 0, speed: 6000 | 2021-06-06 15:51:14

SSH access for m2x m3x

Is it possible to support m2x m3x series machines? How can I access ssh under the root user with full read write privileges

permission denied (newer firmware)

Hello and good evenings !
With the newer firmware, there is no root access :(
so therefor, the steps explained in your guide cannot be proceeded.
Can you please provide us with an older firmware with root access, or a new one with root access.
Thank you !!

m21s help needed

Hello,
I'm trying to use this script on m21s asic miner. I can't mount filesystem.

Thanks.

Permission denied

Hi my m3 v2 firmware version is 20190404. I wanted to copy fake_fan_initd file to etc/init.d with WinSCP.
But this message appears. "copying file failed"
"scp: /etc/init.d/fake_fan_initd: Permission denied".
Please help me.
https://imgur.com/a/5yEDSfY

Hello

Hello,
I have an M32 whatsminer and I would like to use your script to put it in the oil. However, I have a lot of error. I am not a fan of SSH and use a Windows environment.
The errors are: Are you root? Access denied

I tried to do the lines one after the other in CMD from a workstation but it doesn't work either.

Could you guide me on Windows to set up your fan simulator?

PS: I have access to Putty on my miner.

control fan speed

Hello,
Is it possible to control the fan speed on a specific number?
For example, I want to put 3000 for fan speed.
the released file change the fan speed up to 6600

firmware M3

With what firmware working this script?
I have Whatsminer M3 and autofreq firmware, just tested script with connected fan, but it not work :(

error to mout sys/class

Where should i do these setup? I mean we should do this on control board kernel or on another board