Network Binding Arping and DHCP issues

Add-ons Bindings
8

Then you don’t understand DAC. :wink: As you explain, this is how it’s supposed to work. Thanks for the excellent explanation!

Have you tried the hping3 approach? You can’t do it through the network binding but you can execute an external script to issue one special type of packet which wakes the device enough to respond to the ARP. I know it works like a champ with iPhones, Pixel 2XL and Pixel 3XL.

iPhone Presence Detection with hping3 and ARP - #28 by rtvb has the original and the script I’m using is

#!/bin/bash

# https://community.openhab.org/t/iphone-presence-detection-with-hping3-and-arp/18171/28

# detect iphone by IP and MAC address.
# use MAC address too, to prevent false positives if IP might change
# return ON or OFF so output can be directly bound to a switch item

# number of retries, less is faster, but less accurate
MAXRETRIES=20

# exit immediately if no parameters supplied
if [ $# -lt 2 ]
        then
                echo "UNDEF"
                exit 1
fi

# Set variables
IP=$1
MAC=$2

COUNT=0
while [ ${COUNT} -lt ${MAXRETRIES} ];
do
        ip neigh flush dev eth0 ${IP}
        hping3 -q -2 -c 10 -p 5353 -i u1 ${IP} >/dev/null 2>&1
        sleep 1

        # Only arp specific device, grep for a mac-address
        STATUS=`/usr/sbin/arp -an ${IP} | awk '{print $4}' | grep "${MAC}"`

        if [ ${#STATUS} -eq 17 ]; then
                # exit when phone is detected
                echo "${IP} ON"
                exit 0
        fi
        let COUNT=COUNT+1
        sleep .1
done

# consider away if reached max retries
echo "${IP} OFF"
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