How To Add Buzzer To DIY ESP32 / Heltec Lora Meshtastic Node

In this guide, we’ll walk you through adding a buzzer to your existing ESP32 Lora Meshtastic Node. This guide will work also for any Heltec Lora V3 boards but slight changes might be required.

Hardware

Now let’s get started with the hardware you need:

Assembly

The hardware is all ready and set now to the wiring. For this, we will follow the following Schematics.

Buzzer – DIY ESP32 / Heltec Lora Meshtastic Node

Positive -> PIN 15
Negative -> GND

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Capacitors are good practice for decoupling one part of a circuit from another

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It’s Important To Note That The Order Of The Connections Might Vary. Follow The Labels And Io Ports On Your Specific Components And The Provided Schematics To Ensure Accurate Wiring. Paying Attention To These Details Ensures That You Establish The Correct Connections And Avoid Potential Issues or Damaging Your Components

Once all the wiring is completed. Double-check your connections and ensure they match the suggested layout before proceeding to the next steps.

Meshtastic Settings

Open Meshtastic App (IOS for this guide)
Go to the Settings page
In the module configuration section go to External Notification
Toggle the switch to enable Enable, Alert when receiving a message, Use PWM Buzzer
Scroll down then Primary GPIO toggle Active then set the output pin GPIO to Pin 15

In conclusion, enhancing your DIY ESP32 Meshtastic Node with a buzzer is a simple and enjoyable process. By carefully following the provided guide, which includes a list of required hardware and step-by-step instructions, users can seamlessly integrate a buzzer into their existing setup. The hardware assembly, including the buzzer and pin connectors, is clearly outlined, ensuring a smooth implementation.

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