XiaoXiangElectric 4+

I just updated the app to the new version (1.4.3). After the update and connecting to the BMS, the app performed a firmware update. Now the battery SoC suddenly shows much lower despite similar volate (71% SOC before update, 51% after). Something must be very wrong. I don’t want to rely on this anymore and will have to get another method for monitoring the batteries.

The software works ok, to have access to the control functions you need an account with your email address. Mine - Management - Apply for authorization. If you just want monitoring you don't need to create an account. Indeed, after applying the firmware update, there is a gap in capacity, but after full charging it balances out. I like that it saves the graphics as a kind of history but after closing the app it doesn't save, that's why it gets four stars.

App used to allow control of BMS by default login. Xiaoxiang recently added a spyware feature disabling controls until you make an account, send them your battery ID and email and IP address, and only then they decide if you are worthy to operate your own battery. And they can record every time you change a parameter. And it doesn't work if you're out of network range.
I could not use my JBD BMS battery to power a cooktop while camping after updating the app. Had to hack open my own battery and hotwire the BMS C- to B- pins just to make a meal.