Madrid radioactivity data in real time

Last modified December 2, 2020

Beta and Gamma Radiation Data in Madrid in Real Time

Yes, the graph that you can see below, except for unexpected problems, has been generated right now, in real time. Look at the hours.

[wpdatachart id = 1]

There is a web page where you can see various charts. can you see her clicking here.

Next, I will tell you how the detector works.

After having my detector Geiger finished and working, the next step is to send this radioactivity information to the network. Furthermore, it so happens that I have not been able to find a single station in Madrid on the internet sending Beta / Gamma radiation data in real time, so this may be the first station in Madrid to send this type of data (and I'm excited, because it is difficult to be the first in something on the internet today :-))

The Geiger counter I have built has a serial port through which the detected radiation data is transmitted every 15 seconds. This has made things much easier, since all I have had to do is provide it with "something" that reads them and sends them to my home automation system and the network.


As on other occasions, I have used a NodeMCU with the ESPEASY firmware. This time there was no ESPEASY plugin to read the serial output of my Geiger counter, but it was not very difficult to adapt another existing plugin to read them.

EspEasy Geiger Counter

The new device reads the serial output of the Geiger counter, processes it to extract the specific data of Pulses Per Minute and sends this data through MQTT to my broker.

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Send to Radmon with Node-Red

A node in Nore-Red receives the radioactivity data sent by the device and forwards it to is a site where hundreds of volunteers around the world send, in real time, the data obtained by their detectors to facilitate their visualization, generation of graphs, etc.

The "Build Radmon url" function is very simple and it simply builds a url, following the Radmon API specifications with my username, password and the last measure.

Saving data to InfluxDB

Another node of Node-Red inserts the data in an InfluxDB database which allows me, later, to create graphs of this data in Grafana.

9 thoughts on “Datos de radiactividad de Madrid en tiempo real”

  1. Hello, I have seen this post when doing a search for people who are taking radioactivity data, I am interested in the subject and I am surprised that I have not found more people

    • Hi Javier.

      Indeed, it is surprising to see how little information of this type is on the internet.

      At the moment there is a small problem with the page that shows the radioactivity data in real time but I hope it will be solved shortly and that it will be shown again in Ionizing Radiation in Madrid in real time.

  2. Hello,

    Great work by the way,
    I've been trying to create a similiar sensor, but I have a problem with adapting ESPEasy plugin.
    I have tried a to modify pulse counter, but without any success. Could you please share more information your solution for this?

    • Hello Michal.

      Thank you very much for your comment.

      You don't have to modify the pulse counter. Just connect his serial port to the ESP8266's serial port.

      I'm willing to expand the post, or create a new one, to explain in more detail the process. Please tell me what are you having problems with if I know what to focus on.

      • Hello. I have a problem with ESPEasy not working with a counter - Pulse Counter can't read pulses on any GPIO pin.
        This problem does not occur on ESPurna-Geiger build, which I use as a temporary solution, so I think that the problem might be in ESPEasy script (?).

        Meanwhile, thanks to Your tutorial, I've created prototype detector and it works!

  3. Radiation monitor for zendick
    MIAMI SHORES, FL, United States at coordinates 25.8673, -80.1758
    Geiger counter with SBM-20 tube
    1356 CPM on 2020-11-10

    PREVIOUS READING WAS 3435CPM !!!!!!!!!!



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