For Sale Standalone ESP32 BLE Battery Display for Victron Systems

[RicoPicoUK]

I’ve built a standalone ESP32-C3 BLE telemetry display for campervan/off-grid battery systems. It uses a circular touchscreen display and reads data directly over Bluetooth LE, so there’s no requirement for Home Assistant, internet access, or external gateways.

At present, support is mainly aimed at Victron equipment, as that’s what I’ve tested extensively. If there’s another BLE battery or device people want support added for, let me know and I’ll see what can be done.

I’m happy to share the firmware/source code if people want to build their own device, but I won’t be providing step-by-step setup support. If you’re reasonably comfortable with Google, PlatformIO/Arduino, and modern AI tools, it should be straightforward enough to get running.

Alternatively, I can supply a fully programmed unit ready to go for £35 posted within the UK. That leaves me roughly £15 profit after hardware, programming time, and postage, which makes it worthwhile my end.

The AI thing told me to add this:

• hobbyist-built,
• small-run,
• and supplied as-is without formal warranty.

I will do my best to help out, but this isnt a business or anything. Just a tinkerer that put a useful thing together.

Current Stock as of 08/06/2026
3 Screens
0 Cables - I anticipate cables will be back as of 15/06/2026

I am away until Monday 15th June.
I might be able to respond depending on mobile signal.

Video/demo here:

 

[Dellmassive]

Me please, deffo want to try this.

I've got a Cerbo GX in both vans.

In the bus:
Cerbo Gx2
Orion XS BT
100/50 mppt BT
Twin roamer batts via CAN to GX
Inverter BT/ve direct
Ip22 BT charger (no lights no to GX)

So how will it link to the above kit?

DM me for the dosh etc


....

 

[RicoPicoUK]

I have replied to Dellmassive, via DM.

They have asked if it would support other devices than what I have, - from their list probably only the MPPT would work.

I guess this is a word of warning to others, in that perhaps unless you are running a victron shunt, or victron solar charge controller, the device might not support your stuff.

It might support your Ecoworthy battery, - I will go camping with brother in law over the weekend, and I will update the post if my code works! I will probably take my laptop for a small debug, but new forest is really relax time, and not nerd time.

I was thinking about making a little side project of having a small cheap device to send out to people, I think I could make one that records bluetooth data for 5 mins, and then I can ask the user to send me a file that the device produces. - This would allow me to test the bluetooth signals here, remotely. This is purely in planning at the moment in my head, but i think its possible. That way, over time I would be able to look to support other devices.

 

[Virtualmeuk]

Yeah me as well!

 

[RicoPicoUK]

Just waiting on the parts to arrive from China, Do you have Victron things like me?

 

[campagquinn]

Can I get in the queue and order one also please
Victron dc -dc 18amp
Victrom shunt
Victron mppt 75/15 200w panel
Victron mains charger
DM me for more info cheers

 

[Cnud]

I'd really like one of these built please for my Victron smart charger and solar install. Will look great in the van and saves me having to explain the app to my wife !!

 

[BoroBoy]

I have a Victron shunt and a Victron 100/50 MPPT installed in my van for my solar panel.
I have a Renogy 0amp DC-DC charger for 1 of the 100ah Lithium batteries ( below)
I also have 3 Renogy Lithilum batteries, 1 x 300ah ( connected to Solar Panel) and 2 x 100ah installed.
Would your display unit be suitable for my set up.
Please DM me if you require any further info.

 

[RicoPicoUK]

I have a Victron shunt and a Victron 100/50 MPPT installed in my van for my solar panel.
I have a Renogy 0amp DC-DC charger for 1 of the 100ah Lithium batteries ( below)
I also have 3 Renogy Lithilum batteries, 1 x 300ah ( connected to Solar Panel) and 2 x 100ah installed.
Would your display unit be suitable for my set up.
Please DM me if you require any further info.

Morning, yes, looks like it's ideally suited.

 

[BoroBoy]

Can you add me to your list of customers please.

 

[RicoPicoUK]

Thanks everyone who showed interest so far.
I received an email saying the parts should be delivered soon. - evri email said they have the item yesterday, so presumably they will deliver it by Friday?

I have updated the firmware a bit, it's still only working with victron mppt and Victron shunt currently. My initial tests on brother in laws eco worthy didn't work.
Although I didn't really get much time to debug.

I will do another video showing new features.
In the interest of supporting new devices, I have added the ability for the device to record its surroundings and have the user send me the file and any keys for the Bluetooth, I will try and get it decrypted and if it works can include it in new firmware.

I have added the ability to update the firmware on the device itself.

I have made a few cables up that allow the device to be powered from a port on the back. This allows the device to be flush mounted etc.

They can be powered from 5v or 12v, I could probably make a cable for 24v if someone want it.

I will sell these cables for £4.50 each.

 

[Virtualmeuk]

My system is all Victron except the battery which is a fogstar 230ah:-
Cerbo GX
Victron Smart Shunt
Edges or faces may be crossing. Review in box mode.
Victron MPPT
Victron Multiplus Charger / Inverter
50 amp DC-DC

 

[Millstone]

@RicoPicoUK

Please can I join the list for one of your units + rear cable?

I have a Victron Smart shunt, Orion TR Smart and Blue smart AC charger.

Battery is a Renogy eco jobby.

 

[RicoPicoUK]

Hi Everyone,

So the screen's have arrived today, and I have programmed them all with the firmware.

Didn’t realise many people would want them, I have 9 here total, and I appear to have 8 customer's in the thread!
I have ordered some more boards.!!

I have made a video showing a few updates to the firmware.

I will send each of you a DM with my details for payment, and I should be able to send them out tomorrow if were quick about this.

 

[RicoPicoUK]

Hey Everyone, thanks so much for the purchases already.

Few updates.

I have sent out all order's made yesterday afternoon, I hope they should be with you soon.

I have bought a domain name, and made a small website - I think I will still make updates here, but the website will serve as a bit of a support function too.
I have changed the email address, - so for blecapture's please sent them to [email protected] - along with any keys that might help be decode the data.

Away time:
Im doing to Download music festival next week (in the van of course!) so will be leaving Wednesday 10th morning, and will return on Monday 15th. I dare say my ability to use mobile data will probably be slim to none over this period. - I appreciate that this might be when you lot need a helping hand with functions. I will see what I can, but if I dont respond, you will know why.

Since sending out the units, I have updated the firmware.

you can get the latest firmware from the website I made, www.chargescreen.co.uk

As always, please let me know if you want something changing, or adding. Happy to accommodate.

RicoPicoUK

 

[RicoPicoUK]

Today I have added support for Eco Worthy batteries.

 

[jimmy01]

Can I grab one please,
orion 12/50, smart shunt 702, mppt, 12/1600/70 and ecoworthy battery.
thanks.

 

[grahamtill]

This is a great implementation idea. I've been playing around with ESP32 S3s myself. Did you say you're putting this github? Wouldn't mind a look at the BLE protocols.

I was looking at doing something with these devices myself but didn't think of this.

 

[RicoPicoUK]

This is a great implementation idea. I've been playing around with ESP32 S3s myself. Did you say you're putting this github? Wouldn't mind a look at the BLE protocols.

I was looking at doing something with these devices myself but didn't think of this.

Sure, no probs
My GitHub is GitHub - ricopicouk/ChargeScreen: Standalone ESP32-C3 Battery Dashboard

 

[grahamtill]

Cheers, out of interest did you reverse engineer the BLE or did you find Victron docs?

Whats the range on the BLE in the metal confines of the van? This would be great somewhere by the door or even on the vehicle dash. I've got a newish Van conversion business and I'm looking to put some flourish into the builds. Was going down the more 'smart' route but I'm not convinced there's a market for it.