[FR] Voltronic /Axpert Invertors Bluetooth support #293

Saentist · 2022-12-31T22:27:37Z

Is there any information how to read status over Bluetooth in Voltronics / Axpert and clones
All they are controlled by WatchPower app on android
Mostly all Inverters with this control panel.

jblance · 2023-01-08T20:59:47Z

Do you have this setup working (with the app)?
Have you logged the bluetooth traffic from the app?

Saentist · 2023-01-08T21:30:28Z

Do you have this setup working (with the app)? Have you logged the bluetooth traffic from the app?

Yes I have Bluetooth compatible inverter.
But for second part accept any suggestions how to do it.
I can connect to inverter with standard PIN 123456 under Linux/Windows,
but no COM port emulation is enabled on it as on phones.

Guess something as this.
https://support.honeywellaidc.com/s/article/How-to-capture-Bluetooth-traffic-from-and-to-an-Android-Device

jblance · 2023-01-08T21:42:59Z

Yep thats the way - then post the log and/or try to decode it yourself
It takes a lot of trial and error to reverse engineer the ble log, but I am building a new battery at the moment and have a similar inverter, so will take a look once i get it running

Saentist · 2023-01-09T09:02:26Z

btsnoop_hci(1).zip

Its not so human readable, but ID55355535553555 is inverter

jblance · 2023-01-09T09:12:40Z

Great. Did you do anything in the app or is it just receiving data? Can you grab a screen shot of the data Ps you need wireshark to be able to read it and even then it takes a lot of guess work

…

On Mon, 9 Jan 2023, 10:02 pm Saentist, ***@***.***> wrote: btsnoop_hci(1).zip <https://github.com/jblance/mpp-solar/files/10371745/btsnoop_hci.1.zip> Its not so human readable, but ID55355535553555 is inverter — Reply to this email directly, view it on GitHub <#293 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAJVKNTPUNJCD4YOCDPCIKTWRPH2ZANCNFSM6AAAAAATNYASLI> . You are receiving this because you commented.Message ID: ***@***.***>

Saentist · 2023-01-09T13:51:13Z

I try to analyse via Wireshark but no success yet not see values.
capture is made with very low spec android 6 phone (Alcatel Pixi 4)
Will try to make new capture with screen recording,
to be more easy to compare actions and responses.

Saentist · 2023-01-09T17:05:23Z

there is some long repeating string in peyload with lenght 671
Event 0x13

806001060002428000000000059cbd357d0000000000000000007776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db7776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db7776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db7776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db9cbd357d0000000000000000007776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db7776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db7776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db7776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db9cbd357d0000000000000000007776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db7776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db7776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db7776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db9cbd357d0000000000000000007776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db7776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db7776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db7776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db9cbd357d0000000000000000007776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db7776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db7776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db7776db6eedb6dbbbb6db776db6ddddb6dbbb6db6eeedb6dddb6db

guessing by repeating logic can be something as this

806001060002428000000000059
cbd357d000000000000000000
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db9
cbd357d000000000000000000
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db9
cbd357d000000000000000000
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db9
cbd357d000000000000000000
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db9
cbd357d000000000000000000
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db
7776db6eedb6dbbbb6db
776db6ddddb6dbbb6db6eeedb6dddb6db

repeating segments aka possibly not changed setting from report

first 8 symbols are growing ... guess time or timer.

Saentist · 2023-01-09T20:29:17Z

one more log with video for comparsion
hci_snoop20230109214525.zip

Video.2023-01-09.22-06-08-1.mp4

jblance · 2023-01-09T22:47:41Z

it looks like an encrypted setup

but some info is clearly visible in the trace, eg product info in frame 396 response on handle 0x0017

Saentist · 2023-01-09T23:12:21Z

There is a encryption key after connecting.

jblance · 2023-01-09T23:13:43Z

response on handle 0x001d might have basic info

jblance · 2023-01-09T23:15:04Z

There is a encryption key after connecting.

yes, but the encryption will make connecting with python harder

Saentist · 2023-01-09T23:23:11Z

No battery connected to inverter.

adding *0.1 for correct values needed

jblance · 2023-01-09T23:25:09Z

No battery connected to inverter.

yes, just trying to see the same values (after decode) in the log file

Saentist · 2023-01-09T23:29:09Z

first log have PV voltage, MPPT make it flat ~120Vdc

jblance · 2023-01-10T19:24:30Z

handle 0x0023 rated info

handle 0x0023
fc08d900fc08f401d90088138813e00101000000

Saentist · 2023-01-10T22:37:32Z

0x0023 inverter rated specs
0x0017 firmware versions
0x001a serial number
0x001d ???
0x0020 ???
0x0026 ???
0x0029 ??? only zeros
0x002c ???
0x002f ???
0x0035 ???
0x0038 ??? * small changes
0x003b ??? *
0x003e ??? zeros
0x0042 ???
0x0045 ???
0x0048 ???
0x004b ???

respond on value changing in settings.

Saentist · 2023-01-11T22:21:58Z

I try some ble scan tool and this is strange results.

Screen-20230111-234217-1.mp4

hci_snoop20230109214525 (2).zip
hci_snoop20230109214525 (2)_.zip

sniffing is larger and in two parts

Interesting if inverter s paired via android /not app/ it cannot be scanned

jblance · 2023-01-11T23:38:27Z

Interesting if inverter s paired via android /not app/ it cannot be scanned

Wonder if this the encryption?

I thought the inverter I just got was one of the ble ones, turns out it's just wifi

jblance · 2023-01-11T23:40:59Z

On the git repo there is a ble-scan.py can you try running that somewhere in range of the inverter (you'll need pip install bleak if you don't have it)

Saentist · 2023-01-12T08:52:53Z

Yes will try

TI recommend this tool
https://www.ti.com/lit/an/swpa234/swpa234.pdf?ts=1673270553469
https://github.com/Hari-Nagalla/BT-HCI-Logging

Wondering how many time will take to "close source payed monitoring" made from "free software" to monetize your code
Enable donations in repo ;)

jblance · 2023-01-12T09:25:47Z

The log capture is the easy part, the hard bit is figuring out what the data corresponds to.

I don't think there's money in this code. Helpful for some maybe but that about it

Saentist · 2023-01-15T10:29:51Z

ble-scan.py

Can you post link to this file?

jblance · 2023-01-15T19:04:21Z

https://github.com/jblance/mpp-solar/blob/master/ble-scan.py

DonDavici · 2024-07-13T21:21:03Z

I have an Outback SPC III which looks exactly like the picture in the first post. I figured out how to decode data. My implementation is not ready and I am not good at coding at all. But maybe it helps. I use the code with VenusOS to simulate a Victron Device. For my purposes it works quite well.

https://github.com/DonDavici/OutbackSPC/blob/main/outbackbt.py

jblance added the enhancement label Jan 8, 2023

jblance added this to the Improve BLE support milestone Jan 8, 2023

jblance added this to mpp-solar project Jan 9, 2023

Saentist mentioned this issue Apr 2, 2023

root@raspberrypi:/usr/src/mpp-solar# mpp-solar -c QPIGS -P PI16 -p /dev/hidraw0 #328

Closed

jblance modified the milestones: 0.17 release, ble updates Jul 28, 2023

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[FR] Voltronic /Axpert Invertors Bluetooth support #293

[FR] Voltronic /Axpert Invertors Bluetooth support #293

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[FR] Voltronic /Axpert Invertors Bluetooth support #293

[FR] Voltronic /Axpert Invertors Bluetooth support #293

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