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Xiaoxiang BMS app/software update from wnsnty.xyz????

I grabbed the latest version from Overkill Solar. I like the ability to see each cells voltage when viewing the main status page.

3.1.1026​

 
Is it normal that when the battery capacity get down to about 10% the BMS cannot connect to the Xiaoxiang app anymore? I'm usin th 10.21 and while doing a capacity test and discharging the battery the Xiaoxiang app lost connection to the BMS. I can see the BMS in the apps but when I try to connect to it it'll ask for the password for random number of times, then opens the app, but doesn't refresh the dashboard and after some seconds the app closes down. What's happening here?
 
So I think both 3.1.1021 and 3.1.1026 have some problems. I kinda feel bad since I was the one who convinced Steve @ Overkill to replace the download link for 3.1.1015 with the one for 3.1.1026. I've dropped back to 3.1.1015 and am happy enough with it.

Steve's made some comments in his manual and in videos about the Android app. He has an iPhone but I believe thinks the Android app is not as good. For example, you can calibrate the voltage measurements of the BMS via the iPhone or the Windows app, but not from the Android app. I purchased the USB interface for the BMS when I bought mine, so I'm probably going to try that out with the Windows app.
 
I tested 1026 against my two BMS today and it worked fine. Just like 1015, it doesn't like switching between BMS but will do it by clicking on the BMS again. My settings, including the BMS names, were still there. The first time I connected to each BMS, the app prompted me to confirm the Ah capacity and cycle amount (in Ah). I use 280 and 240, respectively.

I'm running Android 11 on a Samsung Galaxy S10.
 
I'm using a JBD bms on a 10s pack, with Leaf modules. I have a question about the JBD bms parameter settings. I have the v3.1.1015 app version on android.

I would like to use a cell voltage range of about 3.6 to 4.1. The bottom voltage is a minor issue: the lower cell voltage cutoff seems like it can't be set above 3.2 volts per cell, at least from the bluetooth android app. Is that really a limit of the BMS firmware, or is just the android app.

I can set the pack voltage at 10x = 36.0v, or I've set it now at 37.1v since that's about where the currently not so well balanced cell hits 3.6v. I'm charging 2 lower cells separately to get them back into balance.
 
Question regarding the Dashboard on v21 and v26. My BMS has two temp sensors, one on the cells and then the one incorporated in the JBD BMS. The dashboard shows the temp of the BMS, but I'd like to change it to show the temp of the cells, but haven't found a way to do this. So now Temp-2 is feeding the dashboard, but I'd like to change it to Temp-1. Is it possible to select the temp input for the dashboard?
 
Mako74 said:
Question regarding the Dashboard on v21 and v26. My BMS has two temp sensors, one on the cells and then the one incorporated in the JBD BMS. The dashboard shows the temp of the BMS, but I'd like to change it to show the temp of the cells, but haven't found a way to do this. So now Temp-2 is feeding the dashboard, but I'd like to change it to Temp-1. Is it possible to select the temp input for the dashboard?
Click to expand...

The dashboard should be showing the highest of the two temperatures. I haven't found a way to pick just one.
 
I've noticed in each of the available app variants the voltage displayed for individual cells can vary from app to app. All of them are different than my multimeter, which I trust. Overkill's pdf talks about calibrating cell voltages and even shows a screen to do so, but I can't find any way to do that on any of the app variants.

Anybody else found a way to calibrate the display? There's a lot going on in the BMS that the various apps do and don't address. The fact that OverKill's pdf says that it is possible suggests that the BMS is able to be customized, but nobody brings that capability out on the app?

Thanks,
 
Quinbus51 said:
I've noticed in each of the available app variants the voltage displayed for individual cells can vary from app to app. All of them are different than my multimeter, which I trust. Overkill's pdf talks about calibrating cell voltages and even shows a screen to do so, but I can't find any way to do that on any of the app variants.

Anybody else found a way to calibrate the display? There's a lot going on in the BMS that the various apps do and don't address. The fact that OverKill's pdf says that it is possible suggests that the BMS is able to be customized, but nobody brings that capability out on the app?

Thanks,
Click to expand...
I bought the USB interface from Overkill, so that I can run the PC software. It allowed me to calibrate my BMS cell voltages. I have an Android phone, and I believe Overkill specifically says that it doesn't provide the calibrate function, but that the iPhone app does. That's going from memory though.

I guess I haven't noticed a difference between the various Android apps. Not sure how that could be, since they are just reading the numbers from the BMS and displaying them. I have actually tested my multimeter with a voltage reference, so - like you - I trust my multimeter. Of my 8 cells, only one was off by more than a millivolt or two, and that one was off by 9-10 millivolts. So I hooked up the PC software to the BMS and recalibrated that one. It's been pretty much spot on with my multimeter since then.
 
Last edited:
Mine are consistently off by around 5 mV, across the board. One of the cells may a little more, one may be a little less. I suppose I'll just make up the difference in my head over time, but I thought it might be nice to true it up in an attempt to be true to my anal retentive nature. :oops:

Thanks for the info.

Q!
 
Quinbus51 said:
Mine are consistently off by around 5 mV, across the board. One of the cells may a little more, one may be a little less. I suppose I'll just make up the difference in my head over time, but I thought it might be nice to true it up in an attempt to be true to my anal retentive nature. :oops:

Thanks for the info.

Q!
Click to expand...
I understand your issue. I'm OCD enough that at first I didn't like the most recent Android version of the App because the graphical display of how full the cells were was scaled - I assume - for LiPo or other higher voltage cells, so even when my cells were at 70-80% they showed as yellow, and never really showed as green. I hated that, but got used to it because that version of the app has more other features. I just had to get over it.
 
kmcintyre said:
I've often wondered if that little blue bar (near 0%) is supposed to move around the "dial" or maybe even into the "green" showing the % charge?
Click to expand...
On the latest version 3.1.1026 the padlock is replaced with a current (amp) meter and the dial does move around to indicate the amps. I'm guessing originally it would've indicated speed for the ebike applications.
 
I found this thread in Google and I thought I would drop in and say hello :)

I made those pages on wnsnty.xyz because the official downloads (at least when I first created the pages) were a mess and all over the place. Kinda still are, considering that the jiabaida.com doesn't tell you what version you're downloading (it's still 3.1.1026 as of writing this). I actually dislike that jiabaida.com's download is now a generic xiaoxiang.apk, because it means that newer versions are liable to appear and disappear, meaning that there could have been a version 3.1.1025, but they replaced the download with 3.1.1026.

The downloads page on my website links to the original download locations where possible. My mirrors on Google Drive are a backup of the official files with the names cleaned up. It's there just so there is an convenient archive of the various versions.

Hope this sheds some light, cheers :)
 
wnsnty said:
I found this thread in Google and I thought I would drop in and say hello :)

I made those pages on wnsnty.xyz because the official downloads (at least when I first created the pages) were a mess and all over the place. Kinda still are, considering that the jiabaida.com doesn't tell you what version you're downloading (it's still 3.1.1026 as of writing this). I actually dislike that jiabaida.com's download is now a generic xiaoxiang.apk, because it means that newer versions are liable to appear and disappear, meaning that there could have been a version 3.1.1025, but they replaced the download with 3.1.1026.

The downloads page on my website links to the original download locations where possible. My mirrors on Google Drive are a backup of the official files with the names cleaned up. It's there just so there is an convenient archive of the various versions.

Hope this sheds some light, cheers :)
Click to expand...
Thanks for the info! I'm still a bit confused as your site states "Version 3.1.1021 is now out, targeting android 10 and above." but 3.1.1026 is the current version?
 
Yeah I
kmcintyre said:
Thanks for the info! I'm still a bit confused as your site states "Version 3.1.1021 is now out, targeting android 10 and above." but 3.1.1026 is the current version?
Click to expand...
That's fixed now. To be completely honest, I didn't know there was a newer version out there until I had issues with 3.1.1021 and started google searching for a newer version this morning. Not sure if it's a Samsung specific issue, but I'm having issues with the current versions of the app on Android 11. Specifically, the app sometimes gets stuck on a white screen when opening the app and a BMS is already paired. Reinstalling, clearing cache/data only helps until the app is closed again.

Might be stuck waiting for a new version again, just like with Android 10, where the app was completely broken for months.
 
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