Caffeinate for Termux

caffeinate.sh

#!/data/data/com.termux/files/usr/bin/bash -eux

# This script sets the screen timeout to 1 hour to keep the phone awake
# First enable wireless debugging and pkg install android-tools and nmap
# Do adb pair localhost:<port number> and enter code from Settings app

PORT=$(nmap -sT localhost -p30000-49999 | awk -F/ '/tcp open/{print $1}')
echo "Connecting to localhost:$PORT"
adb connect localhost:$PORT || exit 1

cleanup() {
  echo "Restoring display timeout to 1 minute"
  adb shell settings put system screen_off_timeout 60000

  adb disconnect

  exit 0
}

trap cleanup SIGTERM SIGINT

echo "Setting display timeout to 1 hour"
adb shell settings put system screen_off_timeout 3600000

sleep 3600 # sleep for one hour

cleanup()