Manage FAN revolutions on Firm. 4.3.8

This is a simple way to manage the FAN revolutions using shell scripts, allowing us tho change the refrigeration mode of the FSG with cron tasks.

Contents 1 Requirements 2 Installation steps 2.1 Main controller script 2.2 Hot and silent mode 2.3 Standard mode 2.4 Max. Refr. mode

Requirements

The scripts we are going to install, manage the /etc/master.conf file, which can differ between different firmware versions. These scripts are only tested on firmware 4.3.8. If you install them on other firmware version, use it with care. The "bash_3.2.17-1" package is needed. So, if you don' have it, type "ipkg install bash"

Installation steps

Main controller script

• Create an script in /opt/bin/fan-ctrl with this content:

#!/opt/bin/bash

if [ "$1" != "0" -a "$1" != "1" -a "$1" != "2" ]; then
   echo "Use: fan-ctrl <mode>"
   echo "  where mode can be:"
   echo "  0: standard"
   echo "  1: max. refrigeration"
   echo "  2: hot and silent"
else
   MASTER=/etc/master.conf
   TEMPFILE=/tmp/master.conf

   head -n 16 $MASTER > $TEMPFILE
   echo "fand_method=$1" >> $TEMPFILE

   total_lines=(`wc -l $MASTER`)
   tail_lines=$(($total_lines-17))
   tail -n ${tail_lines} $MASTER >> $TEMPFILE

   cp $MASTER $MASTER.orig
   cp $TEMPFILE $MASTER

   killall fand
   sleep 2
   /etc/init.d/fan start
fi 

Hot and silent mode

• Create an script in /opt/bin/fan-hot-silent with this content:

#!/bin/sh
/opt/bin/fan-ctrl 2 

Standard mode

• Create an script in /opt/bin/fan-standard with this content:

#!/bin/sh
/opt/bin/fan-ctrl 0

Max. Refr. mode

• Create an script in /opt/bin/fan-max with this content:

#!/bin/sh
/opt/bin/fan-ctrl 1