In this article i’ll show how to notified through radio signals using RTL_SDR, ham radio and Opsgenie.

Setup and System

• RTL_SDR usb stick
• Ham Radio
• Opsgenie account

There is a nice SDR scanner created by madengr which called ham2mon(https://github.com/madengr/ham2mon). Edited this python script to create alert when specific frequency and squelch value is matches with our desired one.

Basically i followed the Opsgenie Python SDK tutorial:
https://docs.opsgenie.com/docs/opsgenie-python-api#section-create-aler

alarm_Body = CreateAlertRequest(
                message='New message recieved via Radio Freq : '+str(file_freq),
                alias=str(file_freq),
                description='Frequency: '+str(file_freq)+' Squelch:         '+str(squelch_db),
                teams=[TeamRecipient(name='first team')],
                note='New radio stuff happened')
            try:
                response = client.create_alert(body=body)

                print('request id: {}'.format(response.request_id))
                print('took: {}'.format(response.took))
                print('result: {}'.format(response.result))
            except ApiException as err:
                raise ApiException("Exception when calling AlertApi->create_alert: %s\n" % err)

Start and capture block i used these configurations:_

./ham2mon.py -a “rtl” -n 1 -f 434360000 -g 20 -s -40 -v 0 -w_

I said to capture 434.360Mhz Because its legally allowed to use ham radio with A class certificate(which i have 🙂 ) and squelch is -40Mhz so i wont be capture anything not powerful to capture.

Cool Part

Lets try it out ! I will speaking through 433.600(but hardware not rock solid so its .860).

Cool lets see Opsgenie Alert

Whats Next

These will be on part 2

• Using AWS Transcribe and notify when someone calling you through some frequency
• Whenever your favorite music is on FM you’ll get alerts