Mastering Bluetooth: A Step-by-Step Guide

September 4, 2025
WattCycle Bluetooth guide

WattCycle Bluetooth Guide

WattCycle’s official new Bluetooth Battery App is now available for both iOS and Android. iOS users can download it from the App Store by searching “WATTCYCLE” and Android users can find it on Google Play. The original version will remain active, so feel free to choose the one that suits you best. The latest version offers enhanced features—including New Parallel Mode, Fahrenheit conversion and parameter adjustments—to meet all your needs. Please update at your earliest convenience. For any inquiries, contact service@wattcycle.com.

For original version (BMS Meta) Password is 888888

New WattCycle Bluetooth APP (WattCycle®) no need Password

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Codes Meaning of Warning

This is the code meaning of the "Warnings page" in the Bluetooth APP.

Codes Name Codes Meanings
CHG OT Alarm Charging over-temperature alarm
DSG OT Alarm Discharging over-temperature alarm
CHG UT Alarm Charging under-temperature alarm
DSG UT Alarm Discharging under-temperature alarm
ENV OT Alarm Environmental over-temperature alarm
ENV UT Alarm Environmental under-temperature alarm
MOS OT Alarm Mos over-temperature alarm exists
Cell OVP(V) Single cell over-voltage protection
Cell UVP Alarm(V) Single cell under-voltage protection
Pack OVP(V) Pack over-voltage protection
Pack UVP(V) Pack under-voltage protection
CHG OCP(A) Over-current during charging
DSG OCP(A) Over-current during discharging
Hardware protect Hardware protection
High CHG volt High charging voltage
CHG OTP(°C) Charging over-temperature protection
DSG OTP(°C) Discharging over-temperature protection
CHG UTP(°C Charging under-temperature protection
DSG UTP(°C) Discharging under-temperature protection
MOS OTP(°C) Mos over-temperature protection
ENV OTP(°C) Environmental over-temperature protection during charging
ENV UTP(°C) Environmental under-temperature protection
CHG ON Charging
DSG ON Discharging
CHG MOS Fault Charging MOS failure
DSG MOS Fault Discharging MOS failure
Temp fault Temperature failure
Cells fault Battery cell failure
Cell OV Alarm Single cell over-voltage alarm
Cell UV Alarm Single cell under-voltage warning
Pack OV Alarm Pack over-voltage alarm
Pack UV Alarm Pack under-voltage warning
CHG OC Alarm Charging over-current alarm
DSG OC Alarm Discharging over-current alarm
Hardware protect Alarm Hardware protection warning
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Comments

  • David 2025-04-16 10:02
    What is the password or where can I get the password
  • TomL 2025-04-07 09:17
    I like the feature of the older “BMS Meta” where it displays the voltage of each individual cell. Is there a way to get the new “Wattcycle” bluetooth app to display each individual cell’s voltage??? Right now, it can only display the total system voltage.
  • Lester Simonson 2025-04-06 12:32
    Bought 2 12 volt 100 amp batteries. Can’t connect with Bluetooth. Both apps not working. Please advise. Thanks.
  • Mitchell 2025-04-03 02:44
    Need password for my Mini 100 BT to access basic info in the BMS meta app that is missing from the Wattcycle app. The password “888888” from this article doesn’t work.
  • FRANCOIS-XAVIER VAN THUAN 2025-04-02 23:25
    Hello,
    I tried both “META” programs, the old one with the link (V1.1.5) and the one available on the Android Play Store. I had a password issue with both. The code “888888” didn’t work, making them unusable. So, I installed the Wattcycle V25.3.32 app instead.
    It’s true that it works without a password, but I find it a bit lacking. You can’t choose the temperature unit in the settings, as it’s forced to Fahrenheit, and on the main display, both (F and C) are always shown, making it less clear to read.
    More concerning is the lack of diagnostics for each cell (temperature and, most importantly, voltage), which is essential for checking the balancing. The battery cycle count is also missing, which is important for assessing wear. Yet, all these parameters are available in competitor apps.
    On the plus side, the settings do include useful options like warranty registration and the support URL.
    I really hope that Wattcycle will improve this app.
  • Susan Kyle 2025-03-31 07:12
    Just got 2 12v 100amh batteries. Where is proper documentation? Tried BMS meta, but there is no name on eithet battery. Wattcycle app has no documentation i can see, UI is minimal and its not connecting. Thanks
  • Charles C Emge 2025-03-29 22:51
    What does the “CHG Switch” and the DSG Switch" do? The Bluetooth App User manual simply states " (2) Display the charging and discharging switches" – What does that mean? What do the switches actually do ? – Thank You.
  • Charles C Emge 2025-03-29 22:47
    Why are there two app’s in the android app store? There is the WattCycle App, and The BMS Meta App by zhouyuanfei. What is the correct app to use? Why are there two apps? Thank you.
  • Di Acm 2025-03-13 08:09
    My battery does not charge or discharge. Need the password for my battery to check out the BMS status. XDZN_001_B67A. Tried 8s, 1s, 123456. None is working
  • Andrew Krauska 2025-03-11 09:26
    Need the password for my new battery.
    XDZN_001_8F65
    Tried all 8’s didn’t work.

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