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Bluetooth printing for your Divesoft

Trimix Analyser Adapter

Your Divesoft reading.
On a printed label.

Build a small external adapter that sends your Divesoft He/O₂ readings to a Bluetooth label printer. Your analyser stays unchanged.

Basic soldering. No coding. Hardware sourced separately.

Trimix Pro 79 € · one-off per boardAlready built? Buy a licence →
Install or update firmware →
Divesoft analyser, external adapter and label printer
DIY hardware, browser-installed firmware.

Before you start

Will it work with your setup?

Check the essentials first. The parts guide lists the exact components.

See parts and requirements →
  • Analyser: Divesoft He/O₂ with the rear DVI-style connector.
  • Adapter: an ESP32-S3-Zero-compatible board and the specified plug.
  • Printer: Niimbot B1 or B1 Pro and supported label stock.

Not for the SOLO USB-C model. Most builds need only three wires. Use the Divesoft OK key to pause and print; a separate button is optional.

Not sure? Ask about your setup →

Getting started

Three steps to your first label

  1. 01

    Build the hardware

    Get the parts and print the case. Follow the illustrated assembly manual one connection at a time.

    Open assembly instructions →
  2. 02

    Install and check

    Install the firmware, enable Divesoft data output and test basic Nitrox labels without Pro.

    Open USB installer →
  3. 03

    Set up and print

    Pair your printer and pause with the Divesoft OK key. Add Pro if you need full helium/Trimix labels.

    Open operating instructions →
Real hardware and a printed cylinder label

The result

Check it. Print it. Label the cylinder.

Keep the reading and the label together. Set the owner, date and calculation options in the local browser interface, then compare every label with the current analysis.

  • No phone app needed for everyday printing.
  • No subscription. The activated licence works offline.
  • Settings stay on the device through update-only firmware updates.
See controls and label settings →

Software licence

Test your setup first. Buy when you are ready.

Hardware, Divesoft analyser and printer are not included. You source the parts yourself.

Before you buy

Install and check for free

Install the firmware, view live O₂ and helium readings in the browser, and print Nitrox labels without a Pro licence. Print history and CSV export are included. On Trimix labels, the helium value is replaced by “PRO” until activation.

Install firmware →

Trimix Pro

79 € one-off

Adds the actual helium percentage to printed Trimix labels. MOD, END, optional gas density, names and dates are already available in free mode.

One permanent licence per board. No subscription.

€79 until 30 November 2026; €99 from 1 December.

Buy Trimix Pro

Enter your Device ID. After confirmed payment, your key appears on the confirmation page and is emailed to you.

Online checkout currently supports EU billing addresses. Prices include applicable taxes. Questions about another country or several licences? Get in touch.

Everything for your build

Parts, wiring and instructions in one place.

Choose English or German. Both assembly manuals start with the complete wiring diagram and include a downloadable PDF.

Quick answers

Before you start or buy

What exactly am I buying?

A digital Trimix Pro licence for one adapter board. Live O₂/helium readings, Nitrox labels and history do not require Pro. Pro adds the actual helium percentage to Trimix labels. The adapter hardware, analyser and printer are not included.

Do I need the extra button and clock?

Most analysers need neither. Use the Divesoft OK key to pause and print. A separate momentary button is useful for a fixed installation. The DS3231 is only for older analysers without date/time when dated offline labels are needed.

Where do I find the Device ID?

Install the firmware and open the device’s local browser interface. Copy the 12-character Device ID from Licence. Each key works only on the matching board.

How do I receive and activate my licence?

After Stripe confirms payment, your keys appear on the order page and arrive by email. In the device interface, open Licence → Activate existing key and paste the matching key.

Does it need internet during use?

An activated licence works offline. Printing uses Bluetooth and settings are available over local Wi-Fi. A correct label date still needs a valid time source.

Can I order a finished unit or a kit?

The DIY project is available now. Kits and finished units are not available to order. You can leave your preference below; this is not an order or reservation.

Ask about your setup

Not sure which way to go?

Tell us what you have and what you want to do. Ask about compatibility, your build or several licences.

Your question goes to the product team. This does not sign you up for a newsletter.

Prefer email? hello@trimixanalyser.com

We use these details to reply to your enquiry. Privacy notice. Please do not send passwords or licence keys.

Interested in a kit or finished unit?

Have your say

Build your own adapter now

The DIY adapter is available to build now. The parts list, build guide and firmware are already on this website, so you can source the parts and get started.

We have found that most dive teams have someone technically minded who can help with a build, but not everyone has that option.

This survey is to find out whether you need or would like a build kit or ready-made unit in addition to the DIY option already available. These extra options are not available to order yet. Your response is not an order or reservation.

Your response is private. You can vote without an email address.

What would you prefer?