About 123SmartBMS
123SmartBMS is an easy to use yet advanced, modular BMS to keep your lithium batteries in perfect condition, increasing the lifespan of the battery pack. The system measures important data like cell voltages, cell...
123SmartBMS is an easy to use yet advanced, modular BMS to keep your lithium batteries in perfect condition, increasing the lifespan of the battery pack. The system measures important data like cell voltages, cell temperatures and in- and outgoing currents. It also balances all cells to the same voltage during charging. The BMS supervises the whole battery pack and has two signal relays to indicate “allow to charge” and “allow to discharge”. These signal relays can control chargers and inverters with “enable”/”disable” signals or by connecting an energy efficient power relay to the signal relay. An example is the 123SmartRelay. Easily connect your phone to the BMS using Bluetooth to see relevant information including state of charge, energy consumed, energy stored, in- and outgoing current, cell voltages and temperatures. With 123SmartBMS, your battery pack is in safe hands.
Previous Versions
Here you can find the changelog of 123SmartBMS since it was posted on our website on 2023-06-21 12:08:09.
The latest version is 4.1.1 and it was updated on 2026-06-15 20:19:31. See below the changes in each version.
123SmartBMS version 4.1.1
Updated At: 2026-06-15
Changes: Version History Minor improvements 4.1.1 Feb 23 -Added support for firmware v3.3.11-Add setting Vfull 3.6.14 08/18/2024 -Fixed wrong "Vbalance not set correctly" message.
When a user has a Vbalance value which differs from the preset's default Vbalance, the app gave a warning that the Vbalance was incorrect, when tapping on the Vbalance. 3.6.11 06/04/2024 -Small visual improvements for Details tab
-Fix bug where switching to "Other chemistry" does not do anything
-Fix bug where app on phones with Thai calendar crashes 3.6.10 02/14/2024 Added global scroll to Details tab to be able to see more cells at the same time. 3.6.9 12/15/2023 Relay icons now display the relay status instead of "allowed to charge" or "allowed to discharge" because the relay position may deviate from that value. 3.6.8 11/20/2023 -Added support for firmware v3.3.3 by adding new setting 3.6.7 10/18/2023 -Disabled "accessory x tries to open the app" prompt dialog after closing the 123SmartBMS app while being connected to a BMS. 3.6.2 09/26/2023 - Fix re-connect issues with certain chipsets
- Bug fixes 3.6.1 09/14/2023 - Add Expert Mode
- Add Cell Summary with highest and lowest to Details tab
- Add Batttery info to Details tab
- Add support for latest firmware updates
- Hide light bulb and solar panel info when only 1 current sensor connected 3.6.0 09/01/2023 - Update screenshots 3.4.4 05/10/2021 - Fix cell number display in log layout on iPad
- Fix settings state after switching to custom state
- Fix white background when switching battery profile to non-custom profile 3.4.3 01/25/2021 - Manual override for relays
- Battery parameter profiles
- Split Tmin into charge and discharge in gen3
- Bug fixes 3.4.0 12/18/2020 - Fix firmware version issue with minor version 3.3.3 05/10/2020 - Fix issue with v2.0 firmware users 3.3.2 04/26/2020 - Fix crash for non-English devices 3.3.1 04/22/2020 - Apply new gen3 logo and color style
- State of Charge chart small visual tochups
- Disable simulator upon startup by default
- Volt -> volt
- Fix missing characters for units in settings screen
- Fix welcome message "Show settings" moving to settings tab 3.3.0 04/17/2020 - Add State of Charge chart
- Add simulator back
- Fix firmware update
- Fix cel log history for gen3
- Fix error message for V bypass / V balance
- New launch screen 3.2.0 03/23/2020 - Remove location permission that was inadvertently added
- Fix crash on sending feedback if no e-mail is configured 3.1 07/06/2019 - New design with tabs
- Add status relays to dashboard
- Bug fixes 3.0 07/03/2019 - Round cells to 2 digits
- Fix bug with preferred simulator device on real connection
- Performance improvements
- Fix bug with switching simulator and preferred device
- Fix position of logo on dashboard
- Improve look and feel of progress indicator
- Fix communication bug
- Fix audio bug 1.5 11/10/2015 - iOS9 compatibility
- Show welcome message upon first usage with some explanation
- Don't show search progress overlay when showing welcome message
- Bluetooth connection improvements
- Make progress overlay not blocking user input next to it
- Show reading state progress
- Only update BMS settings when changed after editing
- Display "last seen" per device in settings screen (bluetooth advertisement)
- Disable set pin and clear counters when not connected
- Use more status overlay indicators
- Simulator inadvertedly used 3.45 as bypass voltage
- Show firmware version in device description instead of on dashboard
- Show app version in title
- Remove firmwareversion from lower-right 1.4 10/17/2015 - Added option to prevent auto-lock
- Show bypass voltage in settings screen (editable with jumpers on IN-board)
- Cell status shows bypassing in orange
- Fix layout on iPhone5(s) of cell status screen
- Improved simulated device 1.1 06/22/2015 1.0 05/11/2015
123SmartBMS version 4.1.1
Updated At: 2026-02-23
Changes: Minor improvements
123SmartBMS version 3.6.14
Updated At: 2024-08-18
Changes: -Added support for firmware v3.3.11-Add setting Vfull
123SmartBMS version 3.6.14
Updated At: 2024-08-18
Changes: Aug 18, 2024
Version 3.6.14
-Added support for firmware v3.3.11-Add setting Vfull
123SmartBMS version 3.6.11
Updated At: 2024-06-04
Changes: Jun 4, 2024
Version 3.6.11
-Fixed wrong "Vbalance not set correctly" message.
When a user has a Vbalance value which differs from the preset's default Vbalance, the app gave a warning that the Vbalance was incorrect, when tapping on the Vbalance.
123SmartBMS version 3.6.10
Updated At: 2024-02-14
Changes: Feb 14, 2024
Version 3.6.10
-Small visual improvements for Details tab
-Fix bug where switching to "Other chemistry" does not do anything
-Fix bug where app on phones with Thai calendar crashes
123SmartBMS version 3.6.9
Updated At: 2023-12-15
Changes: Dec 15, 2023
Version 3.6.9
Added global scroll to Details tab to be able to see more cells at the same time.
123SmartBMS version 3.6.8
Updated At: 2023-11-20
Changes: Nov 20, 2023
Version 3.6.8
Relay icons now display the relay status instead of "allowed to charge" or "allowed to discharge" because the relay position may deviate from that value.
123SmartBMS version 3.6.7
Updated At: 2023-10-18
Changes: Oct 18, 2023
Version 3.6.7
-Added support for firmware v3.3.3 by adding new setting
123SmartBMS version 3.6.2
Updated At: 2023-09-26
Changes: Sep 26, 2023
Version 3.6.2
-Disabled "accessory x tries to open the app" prompt dialog after closing the 123SmartBMS app while being connected to a BMS.
Disclaimer
Official App Store Link
We do not host 123SmartBMS on our servers. We did not scan it for viruses, adware, spyware or other type of malware. This app is hosted by Apple and passed their terms and conditions to be listed there. We recommend caution when installing it.
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