carsten_h wrote:
> This is the part to create the daemon for temperature checking (it is
> running as a service later:
> >
Code:
--------------------
> > echo 'def temp_check():' >> $powerbuttonscript
> echo ' fanconfig = ["65=100", "60=55", "55=10"]' >> $powerbuttonscript
> echo ' tmpconfig = load_config("'$daemonconfigfile'")' >>
$powerbuttonscript
> echo ' if len(tmpconfig) > 0:' >> $powerbuttonscript
> echo ' fanconfig = tmpconfig' >> $powerbuttonscript
> echo ' address=0x1a' >> $powerbuttonscript
> echo ' prevblock=0' >> $powerbuttonscript
> echo ' while True:' >> $powerbuttonscript
> echo ' temp = os.popen("vcgencmd measure_temp").readline()' >>
$powerbuttonscript
> echo ' temp = temp.replace("temp=","")' >> $powerbuttonscript
> echo ' val = float(temp.replace("'"'"'C",""))' >>
$powerbuttonscript
> echo ' block = get_fanspeed(val, fanconfig)' >>
$powerbuttonscript
> echo ' if block < prevblock:' >> $powerbuttonscript
> echo ' time.sleep(30)' >> $powerbuttonscript
> echo ' prevblock = block' >> $powerbuttonscript
> echo ' try:' >> $powerbuttonscript
> echo ' bus.write_byte(address,block)' >>
$powerbuttonscript
> echo ' except IOError:' >> $powerbuttonscript
> echo ' temp=""' >> $powerbuttonscript
> echo ' time.sleep(30)' >> $powerbuttonscript
>
--------------------
> >
>
> They are reading the temperature with "vcgencmd measure_temp" and if
> it reaches the next step from the config they call this:
> >
Code:
--------------------
> > bus.write_byte(address,block)
--------------------
> >
> where address is 0x1a and block is the fanspeed from config.
>
> I don't know what this bus.write_byte is doing. Maybe it is enough to
> write this a single time to have the fan running always at the same
> speed?
Looks like the you need python, smbus, and rpi-vc. As dependencies. On
the surface, the fan looks like itÂ’s I2c controlled.... They have 3 fan
speeds.
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