This site is now in read-only archive mode. Please move all discussion, and create a new account at the new Victron Community site.
Hi, I am looking for some help to write a script that allows the Venus OS to show all the REC-BMS data parameters.
The RS-485 Communication Protocol and the RS-485 instruction set is listed in the REC manual: REC-ABMS manual (page 10)
Can anyone help?
Thanks!
Since you mentioned me specifically: Sorry, I am not able to help with this project.
Hi @Federico993 !
I might have a rather stupid question, but it's one of my open questions ;) as I will be connecting all together next week.
Components:
- REC BMS 16s (Victron compatible)
- 2 x MulitPlus II 48 | 5000
- 2 x Victron MPPT 150/45 or so
Question:
How to connect the REC BMS with the Venus on the Raspberry? The Multiplus is connected via MK3-Interface to the Raspberry. The MPPTs will be connected via a VE Direct to USB cable to the Raspberry. (I assume)
As the RJ45 port of the Raspberry is busy with LAN connection already, the REC BMS-delivered DB-9 to RJ45 CAN-Cable will not work. Any experience, how to bring the devices together? I assume kind of RS-485 to USB converter (DB-9 or is there a chance to use the REC BMS delivered cable?)
Thanks for a short reply, think this is the last hard one for me...
The RS 485 on the REC unit is primarily used for programing the battery set points. For integration with the Venus OS, it is better to use the CAN bus output. If you're using a pi, then a CAN hat will be needed. The RS485 is slow compared to the CAN output.
Hi, have done this 3 years ago with a python service and highly modified gui / systemcalc.py.
If you are able to program in python and qml, I can send you the source code. My system is quite complex, you need to carve out the parts you need - so it is not beginners friendly.
Cell Data
This is the settings page
Image
Settings Page and some more for all parameters
more settings...GUI Battery overview
PM me your email address or messanger, if you want to go down that rabbit hole, you must be able to read and modify code... My system does not use DVCC / CAN integration on purpose, it runs on a Raspberry Pi4b.
Most settings are read only information, but it is easy to make them writeable.
Hello Johann,
Sorry for digging up this somewhat old thread but I am working on a similar setup and would be interested by the code you have developed. Would it be possible to discuss about it and maybe share it ?
Best regards,
SmoothFroggy
puh, thanks mates! @JohannDo I am not able to code - could try to dig in but as you said, more than beginners know-how is necessary!
So when I got it right: I might need to use a CAN --> USB inverter in order to connect to the PI. Any "working example" available w/o coding?
btw....nice work, @JohannDo
Sorry for digging up this somewhat old thread but I am working on a similar setup and would be interested by the code you have developed. Would it be possible to discuss about it and maybe share it ?
Best regards,
SmoothFroggy
