VeFanControl/setup at main · herrfrei/VeFanControl · GitHub

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#!/bin/bash

# setup Rasperry Pi Temprature measurement and fan control
# This modification adds the raspberry pi temperature to Victron Venus OS
# and allows a PWM fan control

packageLogFile="/var/log/VeFanControl/current"
overlayFile="/u-boot/overlays/pwm.dtbo"
configFile="/u-boot/config.txt"

#### following lines incorporate SetupHelper utilities into this script
# Refer to the SetupHelper ReadMe file for details.

source "/data/SetupHelper/HelperResources/IncludeHelpers"

#### end of lines to include SetupHelper

#### running manually and OK to proceed - prompt for input
if [ $scriptAction == 'NONE' ] ; then
  echo
  echo "The VeFanControl adds Rasperry Pi CPU Temperture bases PWM fan control"
  echo
  echo "  - installs the overlay file for the PWM pin"
  echo "  - adds the PWM setup to config.txt"
  echo
  yesNoPrompt "Do you want to continue (y/n)?: "
  if $yesResponse ; then
    scriptAction='INSTALL'
    eval `python3 read_config.py`

    yesNoPrompt "Change GPIO pin for PWM (default: $pwm_pin) (y/n)?: "
    if $yesResponse ; then
      read -p "enter GPIO pin to use for PWM: " gpioPin
      if [ "$gpioPin" != "" ]; then
        # check it
        python3 write_pwm_pin.py $gpioPin
        if [ "$?" -ne 0 ]; then
          scriptAction=''
          echo "Invalid pin $gpioPin given!"
        else
          echo "Using PWM pin $gpioPin"
        fi
      else
        scriptAction=''
        echo "No pin given!"
      fi
    fi
  fi
fi

#### here to do the actual work

if [ $scriptAction == 'INSTALL' ] ; then
  # read config entries to get the pwm pin
  pushd $scriptDir && eval `python3 read_config.py` && popd

  logMessage "++ Installing VeFanControl with the following settings:\n   pwm_pin=$pwm_pin pwm_freq=$pwm_freq wait_time=$wait_time\n   off_temp=$off_temp min_temp=$min_temp max_temp=$max_temp\n   off_pwm=$off_pwm min_pwm=$min_pwm max_pwm=$max_pwm\n   pwm_chan=$pwm_chan pin_func=$pin_func"

  logMessage "activating VeFanControl settings in $configFile"

  overlayTemplate="/tmp/overlay"
  cat >$overlayTemplate <<EOF
#### begin VeFanControl
dtoverlay=pwm,pin=$pwm_pin,func=$pin_func
#### end VeFanControl
EOF
  if (( $(grep -c "#### begin VeFanControl" "$configFile") != 0 )); then
    removeOverlay=true
    oldOverlayText=$(sed -n -e "/#### begin VeFanControl/,/#### end VeFanControl/p" "$configFile" | grep dtoverlay)
  else
    oldOverlayText=""
    removeOverlay=false
  fi
  if [ -f "$overlayTemplate" ]; then
    installOverlay=true
    newOverlayText=$(grep dtoverlay "$overlayTemplate")
  else
    installOverlay=false
    newOverlayText=""
  fi
  # logMessage "oldOverlayText: $oldOverlayText"
  # logMessage "newOverlayText: $newOverlayText"
  # correct overlay already installed - don't make changes
  if $removeOverlay && $installOverlay && [ "$oldOverlayText" == "$newOverlayText" ]; then
    removeOverlay=false
    installOverlay=false
  fi
  if $removeOverlay ; then
    logMessage "removing old overlay from config.txt"
    sed -i -e "/#### begin VeFanControl/,/#### end VeFanControl/d" "$configFile"
    rebootNeeded=true
  fi
  if $installOverlay ; then
    logMessage "adding new overlay to config.txt"
    cat "$overlayTemplate" >> $configFile
    rebootNeeded=true
  fi

  [ -f "$overlayFile" ] || logMessage "installing PWM overlay" && rebootNeeded=true && updateActiveFile "$overlayFile"

  installService $packageName
fi

# #### uninstalling - check scriptAction again
# if an install step failed package needs to be removed
if [ $scriptAction == 'UNINSTALL' ] ; then
  logMessage "++ Uninstalling VeFanControl"

  logMessage "restoring previous overlay file"
  restoreActiveFile "$overlayFile"
  # remove mods from configFile - do not use restore in case other mods were made manually
  if [ -f "$configFile" ]; then
      if [ $(grep -c "#### begin VeFanControl" "$configFile") != 0 ]; then
    logMessage "removing VeFanControl settings from config.txt"
          sed -i -e '/#### begin VeFanControl/,/#### end VeFanControl/d' "$configFile"
          rebootNeeded=true
      fi
  fi

  removeService $packageName
fi

# thats all folks - SCRIPT EXITS INSIDE THE FUNCTION
endScript