#!/bin/bash
# use: check_port.sh DOMAINNAME PORT 
# 1 = ON, 0 = OFF
# on rasbian:
[[ "$(nc -zvw2 $1 $2 2>&1)" =~ succeeded ]] && echo 1 || echo 0

# on HASSOS: 
# [[ "$(nc -zvw2 $1 $2 2>&1)" =~ open ]] && echo 1 || echo 0