"Truma iNet Box upgrade" is searched often, but rarely with the same thing in mind. Some want to bring an existing box up to date. Others have none at all and simply want the heater to be operable from a phone.
Both lead to the same question: how do I get an app and remote control? There are two serious routes, and they differ mainly in effort.
One thing first, so no false hope arises: there is no software update that modernises the iNet Box. The box is a GSM modem communicating by SMS over the 2G network. No update changes that. Truma stopped production in early 2023, app updates end on 1 January 2027 and support on 1 January 2028.
Route 1: replace the panel — Truma iNet X
Truma's own successor is called iNet X. The key point: the iNet X Panel replaces the CP Plus, it is not added alongside it. Remote control requires a second device, the iNet X Connect — a module with a built-in eSIM. You no longer need to source a SIM card, and SMS play no part any more.
What that means:
- Your existing panel is removed and replaced by the new one
- Cost: the set of panel and Connect sits at around 500 euros, depending on retailer and version
- Running cost: the remote service is included for two years, after which it is roughly 69 euros per year
- Not for every heater: Truma's compatibility list names model year 2018 as the cut-off for the gas models Combi 4 and Combi 6, in places with specific serial numbers
That last point matters most and is easily missed. CP Plus and iNet Box were sold from around 2014 onwards. If your Combi is older, you may own a perfectly working iNet Box and still not be able to move to iNet X. Truma itself phrases it carefully in its own loyalty campaign: the switch is "not possible in every vehicle and not with every existing device configuration".
So before spending money here, check the model year and serial number of your heater. What you can do if your Combi is too old is covered in this article.
Worth knowing: Truma is currently running a loyalty campaign. Owners of a registered iNet Box get two extra free years of the remote service when buying an iNet X Connectivity Set 2. It runs until the end of November 2026 — provided your own configuration is compatible at all.
Route 2: add a box — your CP Plus stays
The second route works the other way round: instead of replacing the panel, an additional device goes onto a free port on the heater. The CP Plus stays where it is and keeps working unchanged. That is what CampMatic does.
In practice:
- Nothing is removed. No hole, no cover plate, no altered interior
- Installed in about ten minutes — one plug into the Truma, one 12 V supply, done
- No changes to the vehicle wiring, and the warranty on your Truma Combi remains unaffected
- No running cost for operating the app
- You keep both: the app from a distance, or the CP Plus directly — whichever suits the moment
Functionally you get what most people mean by "upgrade": current status when you open the app, temperature and operating mode, schedules, alerts through a Telegram bot and, if you want, integration into Home Assistant over MQTT — where voice control is possible too, though that requires a paid cloud subscription or a manually configured setup.
Supported are all compatible models (gas and diesel alike) with a CP Plus from firmware C4 onwards, in any vehicle — tested among others in the VW Grand California. An "iNet ready" sticker on your CP Plus is a good sign: the necessary bus electronics are present.
The connectivity question: WiFi or your own SIM?
For the app to work remotely, the box needs internet. There are two variants, and which suits you depends on how you travel.
CampMatic Truma 4G brings its own connection. You insert a SIM card of your choice — prepaid, contract or IoT tariff — and the box is reachable without any WiFi nearby. That is the simplest route if the vehicle often sits somewhere without network infrastructure, such as winter storage.
CampMatic Truma WiFi joins an existing network: the campsite's, your phone's hotspot, or a mobile router in the vehicle. It is the cheaper variant — provided a network is there.
This is where portable WiFi hotspots without their own SIM card become interesting. These devices use CloudSIM technology: they automatically pick whichever local network is strongest — abroad too, without swapping SIMs or worrying about roaming. Some providers, GlobLinker among them, include a free monthly data allowance.
For heater control such an allowance is generous: the box exchanges only short status messages, which amounts to a few megabytes a month. The vast majority of the allowance therefore stays available for your phone and tablet. A hotspot like that solves two things at once — internet in the vehicle and connectivity for the box.
We do not sell such devices and have no affiliation with the providers; offers change, and it is worth checking current terms and independent reviews before buying. As a way of making the cheaper WiFi variant usable on the road, though, the principle works well.
Which route suits whom?
iNet X makes sense if: you want to stay with Truma, like the idea of a modern touch panel in the vehicle and everything from one supplier — and your heater is from 2018 or newer.
Adding a box makes sense if: you would rather not remove anything, want to keep your CP Plus, prefer no running costs — or your Combi predates 2018 and is not approved for iNet X anyway.
One point in fairness: Truma does offer proper remote access with iNet X, and for newer vehicles it is a clean solution. The difference lies less in the features than in how you get there — replace the panel and pay a subscription, or add a device and keep what you have.
Conclusion
There is no upgrade for the iNet Box itself — the technology behind it is 2G, and that is being retired. What does exist are two routes to an app and remote control: the system change to iNet X with a new panel, or an additional box that leaves your existing controls untouched.
If you are unsure which works for your vehicle, send us your heater model and year. We will tell you honestly what is possible — including when the answer is that something else suits you better.
→ CampMatic Truma WiFi — €149.00
→ CampMatic Truma 4G with its own SIM — €189.00
All installation steps and the compatibility list are in the help section.
Further reading: