question

grunkern avatar image
grunkern asked

Integrating Smart Battery Sense Bluetooth with Venus OS on Rpi

Dear Reader,

I have a Raspberry PI 3 with A BMV712 currently connected via USB to VDE Lead
I also have a MPPT 100/30 Non-Bluetooth that I am going to connect with a second USB to VDE Lead

Thirdly I have a Smart Battery Sense Bluetooth and wish to integrate this so the MPPT Controller can work with the Battery when temperature is low.

Is there any way to make this happen ? OR could I potentially split the VDE port of the solar controller into TWO and connect a Bluetooth Adaptor to one and the USB to VDE to the Other ?

Thanks in Advance

Robert

MPPT ControllersVenus OSRaspberry PiBluetoothTemperature Sensor
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4 Answers
nebulight avatar image
nebulight answered ·

No, you can't split the cable. However since you have the BMV712 (and I assume a temp probe) and the MPPT hooked up to the Pi (assuming with the Venus OS on it), you should be able to enable DVCC and shared temp. Then you can program the MPPT to cut off charge below freezing with victron connect because it's getting the temp from the BMV.

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grunkern avatar image grunkern commented ·

As I wrote I have a BMV712 and also a SMART Battery Sense which is bluetooth. The PI Can be plugged into both the BMV712 and also the MPPT 100/30 which is NOT Bluetooth via USB Cables, however the temperature Monitor is Bluetooth and I cannot see how the BMV712 picks up the Data from this and then transmits it back to the PI with Venus.

Thanks for your answer but I think you are presuming that I have a Temperature Probe like this https://www.victronenergy.com/accessories/temperature-sensor-for-bmv-702
WHEREAS what I have in the system is this:
https://www.victronenergy.com/accessories/smart-battery-sense

SO the only way I can see that this would work is if I use the Bluetooth dongle for the MPPT so that it can pick up data from the Smart Battery Sense, otherwise I cannot see how the BMV-712 gets this Data as it seems to not transmit to that but rather the Solar Controller. If I don't have the MPPT Solar Controller plugged into the PI then I get no Data from it. Any other ideas or am I basically fubared because what I really need is the Bluetooth version of the MPPT 100/30 and then everything would work ??

Thanks for your answer though

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grunkern avatar image
grunkern answered ·

@nebulight - Sorry for delay and thanks for the response.
I have asked another question and tagged you in it

I will at some stage just get the wired non bluetooth battery monitor but as my batteries are NOT litium the temperature parameters are not as important as they would be in a Lithium system

I am not sure what you mean by enable DVCC ??

Thanks
Robert

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ed-kok avatar image ed-kok commented ·

Does this help:
https://www.victronenergy.com/live/ccgx:start#dvcc_-_distributed_voltage_and_current_control

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grunkern avatar image grunkern ed-kok commented ·

Thanks @Ed Kok

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Bill avatar image
Bill answered ·

I am using the SBS and a 712 without temp probe as I wanted to monitor my chassis battery. It appears to be working correctly after I disabled the ve Networking on the 712. When I had the 712 connected to the ve network with the mppt's and sbs it didn't appear to be using the SBS temp/voltage data.

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grunkern avatar image grunkern commented ·

SBS ? what do you mean by SBS please ?? @bigbillsd

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Bill avatar image Bill grunkern commented ·

SBS=Smart Battery Sense (from Victron)

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danny01 avatar image
danny01 answered ·

Is ist possible to monitor only a battery (without any other equipment) using the Smart Battery Sense via Bluetooth with Venus OS on Rpi 3? Pairing OK, connection OK, but I do not see a datatransfer!

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Stefanie (Victron Energy Staff) avatar image Stefanie (Victron Energy Staff) ♦♦ commented ·

No, this is not possible.

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danny01 avatar image danny01 Stefanie (Victron Energy Staff) ♦♦ commented ·

What else is necessary? In the Victron Connect App I can see all data, but no way to trasfer to VRM.

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Stefanie (Victron Energy Staff) avatar image Stefanie (Victron Energy Staff) ♦♦ danny01 commented ·

You will need a BMV-712 or SmartShunt Battery Monitor together with a temperature sensor attached to your battery and a GX device (CCGX, Venus GX or Cerbo GX). The battery monitor connects to the GX device and the GX device then is reporting to VRM.

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danny01 avatar image danny01 Stefanie (Victron Energy Staff) ♦♦ commented ·

I do not understand, why another sensor should be necessary. The Smart battery sensor connects perfectly to the Vicron Connect on IOS and I see al data. Now I want see the data on the Venus OS on the Raspberry. I can connect and I can pair RPI and SBS. The RPI is shown on the VRM patform. So only the datatransfer frim the SBS to the Venus OS is the problem. Maybe the configuration of the Venus Application is not correct. I do not see the sensor there.

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Stefanie (Victron Energy Staff) avatar image Stefanie (Victron Energy Staff) ♦♦ danny01 commented ·

Again, it is NOT possible to see temperature/voltage of the Smart Battery Sense on Venus OS. It doesn't matter whether this a Raspberry Pi or a real GX device.

Victron's bluetooth protocol is not open and Victron will not make the code available to the public. If you know how, then you can try reverse engineering the protocol.

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Glen avatar image Glen Stefanie (Victron Energy Staff) ♦♦ commented ·

Is this a possible workaround? The SmartBatterySence transfers Temp. data to SmartSolar via VE Network. Could the SmartSolar have a variable available in its node, accessible in Node-Red?

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