Calling a phone number repeatedly using ADB

adb_caller.sh

#!/bin/bash

# Enabling ADB over network
# adb kill-server && adb start-server # restart adb server
# adb tcpip 5555 # start adb service
# adb connect <phone_id> # connect to the device

# For enabling loudspeaker and cut the call, make sure to change it based on your phone screen
# Ref for getting touch coordinates: https://android.stackexchange.com/questions/164295/how-can-i-see-the-pointer-location-and-simulate-it

call ()
{
    adb shell am start -a android.intent.action.CALL -d tel:<tel_phone_number> # make a call
    sleep 1
    adb shell input tap 417 392 # enable loudspeaker ------ Change according to your phone
}
cut ()
{
    adb shell input tap 250 693 # cut the call ------ Change according to your phone
}
while :; do
    while :; do
	      callState=$(adb shell dumpsys telephony.registry | grep mCallState | head -n 1 | sed "s/[^012]\+//g")
         if [[ "${callState}" == "0" ]]; then
            break
         fi
         sleep 1
    done
    call
done