[Twiz o'Meter] Porting to Dacia Spring: done! SoM is born...

As anticipated a few time ago, I decided to port my Twiz o'meter project to Dacia Spring.
Porting has been completed and I'm happy to present the Spring o'meter a.k.a SoM, the ToM's brother.
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Since the free traffic of Spring canbus is undocumented (unfortunatly, no Dexter master in the Spring scene...), I had to rewrite a large part of the code for retrieving data with direct calls to specific ECUs/IDs of the vehicle.
This required to organize a timing table to schedule the calls, with different frequency for each data, to keep a good responsivness of the device.
All ToM functions have been implemented. Charging control (stop charge at a desired SOC) is achieved, at the moment, by connecting a relais to SoM's expansion port.

Now I plan to realize a "general" version which can work with other EV vehicles, leaving the possibility to the user to customize the ECUs/IDs address and the data format for retrieving each data used by the device.
But I cannot assure nothing about this task.

I share here SoM firmware so who already owns a ToM and has a Spring to his disposal, can try it (both the blackbox and the LCD need to be flashed).

Have fun with SoM!

Is it time for MoM now?

(MoM = Microlino'o'Meter)

sunneraindler schrieb: Is it time for MoM now?

(MoM = Microlino'o'Meter)

Sorry, MoM is already reserved for the Megane e-tech o'Meter

@Delvecchio: I'm still keen to know more about access to the battery.
- Might there be a way to operate the DC main contactor, too ?
- And drain power from the battery towards the CCS plug ?
- Does the BMS block discharging the battery w/o turning weels ?

If you find answers, integrating a (PV)-Inverter to charge/discharge the battery (V2H) would be the next step.

Basically, if access would be that easy, home hardware integration could follow suit.

sunneraindler schrieb: Is it time for MoM now?
(MoM = Microlino'o'Meter)

With the generic version will be only a metter of knowing ECUs/IDs adrress to be quiried. So is they are known/documentend in some way, it should be possible.

Saarlodrie schrieb: Sorry, MoM is already reserved for the Megane e-tech o'Meter

Megane E-tech should work, because canbus addressing should be the same.

For "MoM" we will make a polling.

@Wolfe:
I think BMS doesn't block discharging without wheels turning, because preheating is available with Spring and is powerd with HV battery.
It's only a metter to find informations about how the ECUs can be controlled via canbus.
To get the informations about ECUs/IDs reading data I had to look inside some well known free-app which already do this.
But controlling ECUs requires deep informations / documentations I haven't.

Okay if the BMS is fine with it, the remaining main part would be: Operating the DC Contactor !

Perhaps someone else is knowledgeable to pass the right hint.

Just a preview of the underground work in progress...

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the data on the medianav come from my Twizy, parked 150 km. far away.

Looks great.
I regret not to own a Spring.

Snorre schrieb: I regret not to own a Spring.

Yes, but you own an android phone and, may be, an android tablet...

For the braves who converted their ToM to SoM, here is the SoMized android app.
SoM android app v 3.0.2
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==> DOWNLOAD LINK <==

The app can be mirrored to the mediaNav. If interested, ask me about.

I finaly succeed to implement control charging, but only with an external relais connected to the expansion port.
I accordance to my test results, it works fine!
You can stop charge at a desired SOC, delay charging start (0 to 15 hours) and abort running charge (also via mqtt commands).
Here some screenshots of the display and the webserver.
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I share the compiled SoM fw for your tests.
You can reverse ToM to SoM and viceversa simply by flashing the desired fw.
==> DONLOAD LINK <==