#!/bin/sh
pi=$(ping -c 5 8.8.8.8 -i 0.5 | grep received | cut -f2 -d"," | cut -f2 -d" ")

case "$pi" in
  5) curl -s "http://127.0.0.1:8080/json.htm?type=command&param=udevice&idx=23&nvalue=0&svalue=100" ;;
  4) curl -s "http://127.0.0.1:8080/json.htm?type=command&param=udevice&idx=23&nvalue=0&svalue=80" ;;
  3) curl -s "http://127.0.0.1:8080/json.htm?type=command&param=udevice&idx=23&nvalue=0&svalue=60" ;;
  2) curl -s "http://127.0.0.1:8080/json.htm?type=command&param=udevice&idx=23&nvalue=0&svalue=40" ;;
  1) curl -s "http://127.0.0.1:8080/json.htm?type=command&param=udevice&idx=23&nvalue=0&svalue=20" ;;
  *) curl -s "http://127.0.0.1:8080/json.htm?type=command&param=udevice&idx=23&nvalue=0&svalue=0" ;;
esac