Automotive Relay style CJ7320 / CJ730 / LK720 Not displaying vehicle battery voltage
when i click on the green button with 3 dots on the device popup and then click more details, there are the following:
Status 4294965759
io1 234
io2 15
I dont know what any of these parameters represent, i'm wondering if perhaps one of them could be decoded into a vehicle battery voltage perhaps? Any help in understanding these would be greatly appreciated
Furthermore, I have been inspecting the h02 protocol documentation.
In one of the resources https://www.traccar.org/protocol/5013-h02/ICARGPSProtocol.xlsx it provides an example protocol message.
As far as I can tell there are a few different types of messages between the client and the server (having looked at the traccar logs)
- Messages from the tracker to the server:
2024-10-16 22:19:15 INFO: [T8f0300b2: h02 < 148.252.146.21] *HQ,IMEIXXXX,V1,221728,V,LAT,N,LONG,W,000.00,000,161024,FFFFF9FF,234,15,0,0,6# - Confirmatory responses from the server to the tracker
2024-10-16 22:19:15 INFO: [T8f0300b2: h02 > 148.252.146.21] *HQ,7201042441,V4,V1,20241016221915#- Messages that i dont quite understand, but having read the h02 protocol documentation it seems to be analogous to the first 1. messages?
2024-10-16 22:24:28 INFO: [T8f0300b2: h02 < 148.252.146.21] 24720104244122242616102451332685060000841126000000fffff9ffff001d2a0000000000ea0f00000000007e0eRegardless, comparing this 3rd message type to the exemplar in the .xlsx spreadsheet protocol reference document I linked to above (will attach screenshot also) it suggests that the penultimate parameter of this message relates to 12v battery voltage
suggestions welcome!
There's a good chance it's not supported because there are many variations of H02-based protocols.
Hi,
Facing the same with the Yuncar tracker cj730.
Did you had any success with an hack to get battery voltage displayed on traccar?
Hi Anton
The same issue with YunTrack cj730
The native app (YunTrack) has voltage data, but not in Traccar
Can you help with this?
Thanks!
What kind of help do you need? It seems like it needs to be implemented in the code.
Yes, 100%
I believe the author of the topic gave a sufficiently detailed explanation of this.
If possible, please adjust the code so that this data can be decoded and extracted.
Thanks!
Any feature requests need to be submitted via GitHub and once they gain enough interest from community, we will prioritize them.
If you're interested in sponsoring this work, then you can also email us directly.
Hello fellow Traccar enthusiasts.
I have installed a traccar instance on AWS lightsail using the very helpful guide from youtuber "Pitloon Garage" (https://www.youtube.com/watch?v=476E1ioFSVg).
I have an automotive relay style tracker (aliexpress special) which appears to be sold under various names including CJ720, CJ730, LK720.
I have configured it and it is now track-able on my traccar web interface and android "Traccar Manager" app which I am very pleased about.
My problem is that I cannot see the display of the vehicle voltage (12v motorcycle). Before I heard about Traccar I was using the chinese gpscj.com server and the "Yi Tracker" android app, both of which were functional and would display vehicle battery voltage in the platform (i.e 11.8, 12.4v etc). However I cannot see this in the Traccar interface.
I know that the tracker I have has a very small internal lipo cell per Voltlog's excellent series of videos on the product (https://www.youtube.com/watch?v=gPs1qvC4kUo). I can see a battery level in the Traccar interface which translates the h02 protocol message into the following levels:
6=100% 5=80% 4=60% 3=20% 2=10%
I believe the battery level shown in traccar is that of the internal cell since it never deviates from 100% which you would expect given it's being constantly topped up by a much larger capacity 12v battery.
I know that it is possible to get the 12v battery voltage from the tracker because it was shown in the chinese server interfaces so I am hoping it will also be possible using traccar as it is rather useful !