Meshtastic RTTTL Custom Ringtones

There are a few devices I consider "every day carry" for Meshtastic. These are typically small devices that have decent battery life, GPS, and are easy to use. A few that I have personally tried include the SEEED T1000E, ThinkNode M3, and the LilyGo TDeck Pro.

All of these devices have one thing in common; their default ringtones are incredibly annoying.

Update 7/25/2025:

Just confirmed that this also works on the LilyGo TDeck Pro. You just have to get it into the Bluetooth Configuration Mode to change the values.

A Little Background on RTTTL

YouTube Breakdown by Anas Kuzechie

Ring Tone Text Transfer Language (RTTTL) is a way of converting a string into musical notes for playback using a device's buzzer. Think of it as an easy way to store music without having to tote around mp3 files on your device. The default ringtone for most Meshtastic devices looks like this:

24:d=32,o=5,b=565:f6,p,f6,4p,p,f6,p,f6,2p,p,b6,p,b6,p,b6,p,b6,p,b,p,b,p,b,p,b,p,b,p,b,p,b,p,b,1p.,2p.,p

That ringtone has 2 parts; a header and the ringtone notes.

Ringtone Header

  • 24 - Name/identifier for the ringtone

  • d=32 - Default note duration (32nd note)

  • o=5 - Default octave (5th octave)

  • b=565 - Beats per minute

Ringtone Notes

After the header, you have a list of notes to play. Notes are comma-separated and include 4 parameters:

  • duration

  • pitch

  • octave

  • dotted-duration

If we break down the first 6 notes in the default ringtone as an example, you'll see this:

  • f6 - F note in 6th octave (duration defaults to 32nd note)

  • 4p - Pause/rest lasting 1/4 the default duration

  • 2p - Pause/rest lasting 1/2 the default duration

  • 1p. - Pause lasting 1 beat with dot (1.5x duration)

  • b6 - B note in 6th octave

  • b - B note in default octave (5th)

Meshtastic Notification Config

Be sure to set the Nag Timeout to a lower number, otherwise it'll pester you over and over again until you cancel out the process using a physical button on your device. If you set the Nag Timeout to 0, your node will only play the notification once.

Nokia Composer

Here's a good website that allows you to play with RTTTL strings and have them playback for you in the browser. Plus it has some fun examples baked into the page.

Nokia Composer

Examples

Legend of Zelda Get Item

24:d=16,o=5,b=120:g,c6,d6,2g6

Super Mario Theme (Shortened)

24:d=4,o=5,b=100:16e6,16e6,32p,8e6,16c6,8e6,8g6,8p,8g

Mario Coin

24:d=8,o=6,b=200:b,e7

Mario Power Up

po24werup:d=16,o=5,b=200:g,a,b,c6,d6,e6,f#6,g6,a6,b6,2c7

Nokia Ringtone

24:d=4,o=5,b=180:8e6,8d6,f#,g#,8c#6,8b,d,e,8b,8a,c#,e,2a

Morse Code CQ

24:d=32,o=6,b=120:8c,p,c,p,8c,p,c,4p,8c,p,8c,p,c,p,8c,8p