# Using Node Red to monitor a radio site

**URL:** <https://discourse.nodered.org/t/using-node-red-to-monitor-a-radio-site/97861>\
**Category:** General\
**Created:** [29 June 2025 10:34 UTC](https://discourse.nodered.org/t/using-node-red-to-monitor-a-radio-site/97861 "2025-06-29T10:34:09Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![dynamicdave](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dynamicdave/32/96_2.png) [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)\
**Post date:** [29 June 2025 11:32 UTC](https://discourse.nodered.org/t/using-node-red-to-monitor-a-radio-site/97861/5 "2025-06-29T11:32:46Z")

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If you have WiFi access at the Repeater Site, then that task should be fairly easy.  
I have built a number of remote sensing units, using ESP32-S2-Mini devices (flashed with Micro-Python), that report some of the conditions you mentioned to a remote MQTT broker and then onto Node-RED.

Here's a link to a tutorial I posted a year ago.

> [@Single Sensor Node (ESP32-S2-Mini or RPi Pico-W)](https://discourse.nodered.org/t/single-sensor-node-esp32-s2-mini-or-rpi-pico-w/84951):
>
> The project is based on an ESP32-S2-Mini and can be deployed to sense temperature, humidity and air pressure in any geographical location. All it needs is access to a WiFi Access Point and a (local or remote) MQTT broker. Today I've been converting the Micro-Python script I wrote for the ESP32-S2-Mini to work on a RPi Pico-W. One of my friends wanted to try it out but only had a Pico-W. I've called it 'Single Sensor Node' as it sits in my greenhouse and reports Temp/Humidity/Pressure and the …

Please note:  
I've recently designed a simple Reporter Node that reports T/H/P, Light Level and Vin and Vreg.  
I'll write a tutorial when I have some spare time.

 ![Friday_Reporter_PCB_A](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/0/0/00b9bbb82b12371a1106cf3e696cfe267a8870bb.png)  
 ![Sat_NEW_Rep_Node_A](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/7/8/7817326fe46783eb995a2a2414adc76a173885a5.jpeg)  
Here's a photo of my digital board (using an ESP32-C3-Super-Mini) that supports 2 by 8-bit ports, BH1750 (light sensor) and BME280 (T/H/P sensor).  
 ![remote_digital](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/8/a/8a6faef7ba01764271d0c6c5bd98cb06c75b5b40.jpeg)  
I have found the IN219 (with I2C interface) is a great chip to sense and report current load.

Note: This particular device is intended for currents up to 3.2A max and Bus Voltage of 26V max.

 ![Sunday_IN219_A](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/4/6/467ad0fd53d7122ee25498ee09037ba349aaf7ef.png)

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