nagios-plugins/check_shelly

#!/bin/python3
#
import argparse
import json
import nagios
import os
import urllib.request

CHECKS = ['wifi']
#
WIFI_QUALITY_ERROR = -30
WIFI_QUALITY_WARNING = -50

if __name__ == "__main__":
    parser = argparse.ArgumentParser(
        prog=os.path.basename(__file__),
        description='Check shelly for nagios monitorin',
        # epilog='Text at the bottom of help'
    )
    parser.add_argument('-H', '--hostname', required=True)
    parser.add_argument('-c', '--check', choices=CHECKS, required=True)
    args = parser.parse_args()
    #
    n = nagios.Nagios()
    status = n.UNKNOWN
    #
    with urllib.request.urlopen(f"http://{args.hostname}/status") as response:
        data = json.load(response)
    #
    #
    if args.check == 'wifi':
        connected = data['wifi_sta']['connected']
        quality = data['wifi_sta']['rssi']
        if not connected or quality > WIFI_QUALITY_ERROR:
            status = n.ERROR
        elif quality > WIFI_QUALITY_WARNING:
            status = n.WARNING
        else:
            status = n.OK
        n.exit(status, f"connected: {connected} - quality: {quality}")