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Merge pull request #139 from alexwickstrom/patch-1

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Format README.md for smc-command
This commit is contained in:
Hendrik Holtmann
2022-12-03 17:22:43 +01:00
committed by GitHub
parent c065120eee a38133947f
commit 4df0a0577e
1 changed files with 42 additions and 34 deletions
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smc-command/README → smc-command/README.md
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@ -1,8 +1,8 @@
Warning
-------
This tool will allow you to write values to the SMC which could irreversably damage your
computer. Manipulating the fans could cause overheating and permanent damange. USE THIS
PROGRAM AT YOUR OWN RISK!
computer. Manipulating the fans could cause overheating and permanent damange.
*USE THIS PROGRAM AT YOUR OWN RISK!*
Background
----------
@ -20,9 +20,12 @@ by running the fans at a low speed like 3500 RPM, which you can barely hear.
Usage
------
# smc -h
`smc -h`
```bash
Apple System Management Control (SMC) tool 0.01
Usage:
./smc [options]
-f : fan info decoded
@ -32,64 +35,69 @@ Usage:
-r : read the value of a key
-w <value> : write the specified value to a key
-v : version
```
Fan control
-----------
To decode:
# smc -f
To decode:
`smc -f`
To manually query and control:
FNum - tells you how many fans are in the system
To manually query and control:
`FNum` - tells you how many fans are in the system
To read data from each fan:
F0Ac - Fan current speed
```F0Ac - Fan current speed
F0Mn - Fan minimum speed
F0Mx - Fan maximum speed
F0Sf - Fan safe speed
F0Tg - Fan target speed
FS! - See if fans are in automatic or forced mode
```
[Replace 0 with fan #. In the MacBook Pro there two fans so this applies for 0 (left)
and 1 (right).]
[Replace `0` with fan #. In the MacBook Pro there two fans so this applies for `0` (left)
and `1` (right).]
To set a fan to a specific speed:
FS! - Sets "force mode" to fan. Bit 0 (right to left) is fan 0, bit 1
is fan 1, etc
F0Tg - Sets target speed, make sure you fp78 encode it (left shift by 2)
For example, to force both fans to 3500 RPM:
# python -c "print hex(3500 << 2)"
`FS!` Sets "force mode" to fan.
- Bit 0 (right to left) is fan 0, bit 1 is fan 1, etc.
`F0Tg` - Sets target speed, make sure you fp78 encode it (left shift by 2)
For example, to force both fans to 3500 RPM:
`python -c "print hex(3500 << 2)"`
0x36b0
# smc -k "FS! " -w 0003
# smc -k F0Tg -w 36b0
# smc -k F1Tg -w 36b0
..to force fan 0 to 4000 RPM and leave fan 1 in automatic mode:
# smc -k "FS! " -w 0001
# smc -k F0Tg -w 3e80
`smc -k "FS! " -w 0003`
`smc -k F0Tg -w 36b0`
`smc -k F1Tg -w 36b0`
..to return both fans to automatic mode:
# smc -k "FS! " -w 0000
..to force fan 0 to 4000 RPM and leave fan 1 in automatic mode:
`smc -k "FS! " -w 0001`
`smc -k F0Tg -w 3e80`
..to return both fans to automatic mode:
`smc -k "FS! " -w 0000`
Temperature sensors
-------------------
TB0T
TC0D
TC0P
TM0P
TN0P
Th0H
Ts0P
TN1P
TB0T
TC0D
TC0P
TM0P
TN0P
Th0H
Ts0P
TN1P
Th1H
Light sensors
-------------
ALV0 - Left
ALV0 - Left
ALV1 - Right
Motion sensors
--------------
MO_X
MO_Y
MO_X
MO_Y
MO_Z