JK BMS 4,3'' LCD vs cheap tablet

[Aridom82]

My 16s lifepo4 battery pack works with a JK bms B2A24S15P and i have connected the small 4,3'' lcd and switch. I am not very impressed with it.
I am thinking that for the 45 eur this small lcd cost you can get a used/refurbished small tablet with bluetooth and have much more for your money, just being sure that the android version is compatible with the jk bms app.
Do any of you guys have considered/done something similar in your diy batteries?

 

[NCislander]

That's exactly what I am doing. Picked up an inexpensive Samsung Galaxy A7 Lite, 8.7" screen. Works great with the JK BMS App.

 

[TimE]

Just use your phone?

 

[Aridom82]

Just use your phone?

I want to have a dedicated screen for each battery pack so i have all the cell information and settings upfront all the time.

 

[DIYrich]

Loose the on/off button with the screen?

 

[Aridom82]

Loose the on/off button with the screen?

you can put a on/off button directly to the jk bms without the 4,3'' lcd

 

[TimE]

I want to have a dedicated screen for each battery pack so i have all the cell information and settings upfront all the time.

Hello Bells, I just check mine on the phone occasionally. What is there to see that needs that amount of continual information?

 

[Aridom82]

Hello Bells, I just check mine on the phone occasionally. What is there to see that needs that amount of continual information?

48 kwh of lifepo4 my friend. I want to be able to see allways all the cells voltages, current, bms status, etc..

 

[TimE]

48 kwh of lifepo4 my friend. I want to be able to see allways all the cells voltages, current, bms status, etc..

Are you going to sit there all day ?

 

[ArthurEld]

I use my Android phone. I noticed that JK app wants you to have current Android version.
So you can't use an old tablet or old phone with the latest app.
I have the app on a tablet but I never use it. I always have my phone with me

 

[Aridom82]

I use my Android phone. I noticed that JK app wants you to have current Android version.
So you can't use an old tablet or old phone with the latest app.
I have the app on a tablet but I never use it. I always have my phone with me

Well there are also cheap tablets around new with latest android. Do you have the link to the requirements of the jk app? I bet you it can work with older android versions. I made it work with a phone 2 and a half years old, and i think that in a lot of devices you could also update the android version. And i believe there is a jk app for windows and ios, so if you can find a cheap tablet with those it could work too.

 

[Aridom82]

Are you going to sit there all day ?

I am going to contemplate my great creation with a clint eastwood stare all day and nobody can stop me.

 

[ArthurEld]

You can find an old APK file on this site and make it work on older Androids.

 

[740GLE]

I’ve side loaded a couple old old Amazon fires that have been gaining dust. So easy.

 

[Mikef]

I use my Android phone. I noticed that JK app wants you to have current Android version.
So you can't use an old tablet or old phone with the latest app.
I have the app on a tablet but I never use it. I always have my phone with me

Latest app doesn't work properly, won't work with Android 12, App on github works on android 6 and 12 and doesn't lockup BMS's

 

[rhino]

It is also possible to use something other then the app on a phone:
I currently use https://github.com/jblance/mpp-solar which has a JK BMS tool to access the JK BMS over bluetooth.

Other references/solutions:

GitHub - syssi/esphome-jk-bms: ESPHome component to monitor and control a Jikong Battery Management System (JK-BMS) via UART-TTL or BLE

ESPHome component to monitor and control a Jikong Battery Management System (JK-BMS) via UART-TTL or BLE - syssi/esphome-jk-bms

github.com

GitHub - PurpleAlien/jk-bms_grafana: Read data from a JK BMS and graph it in Grafana

Read data from a JK BMS and graph it in Grafana. Contribute to PurpleAlien/jk-bms_grafana development by creating an account on GitHub.

github.com

 

[Cheap 4-life]

It is also possible to use something other then the app on a phone:
I currently use https://github.com/jblance/mpp-solar which has a JK BMS tool to access the JK BMS over bluetooth.

Other references/solutions:

GitHub - syssi/esphome-jk-bms: ESPHome component to monitor and control a Jikong Battery Management System (JK-BMS) via UART-TTL or BLE

ESPHome component to monitor and control a Jikong Battery Management System (JK-BMS) via UART-TTL or BLE - syssi/esphome-jk-bms

github.com

GitHub - PurpleAlien/jk-bms_grafana: Read data from a JK BMS and graph it in Grafana

Read data from a JK BMS and graph it in Grafana. Contribute to PurpleAlien/jk-bms_grafana development by creating an account on GitHub.

github.com

The JK bluetooth range only reaches 20ft to my iPad in my house. How are you using what you are describing with that short of a Bluetooth range

 

[rhino]

The JK bluetooth range only reaches 20ft to my iPad in my house. How are you using what you are describing with that short of a Bluetooth range

I have the software running on a Raspberry Pi and the Pi is connected to ethernet so can access the data anywhere.

 

[Cheap 4-life]

I have the software running on a Raspberry Pi and the Pi is connected to ethernet so can access the data anywhere.

I gotta figure out how to make this happen.. being a home builder makes that technology stuff a bit difficult to grasp. Only Pi I know about is the kind that goes in my belly

 

[ArthurEld]

I gotta figure out how to make this happen.. being a home builder makes that technology stuff a bit difficult to grasp. Only Pi I know about is the kind that goes in my belly

I haven't hooked my up that way either. When I'm away I have my wife go out to the shed and tell me what she sees on the app.

 

[Pink]

It is also possible to use something other then the app on a phone:
I currently use https://github.com/jblance/mpp-solar which has a JK BMS tool to access the JK BMS over bluetooth.

Other references/solutions:

GitHub - syssi/esphome-jk-bms: ESPHome component to monitor and control a Jikong Battery Management System (JK-BMS) via UART-TTL or BLE

ESPHome component to monitor and control a Jikong Battery Management System (JK-BMS) via UART-TTL or BLE - syssi/esphome-jk-bms

github.com

GitHub - PurpleAlien/jk-bms_grafana: Read data from a JK BMS and graph it in Grafana

Read data from a JK BMS and graph it in Grafana. Contribute to PurpleAlien/jk-bms_grafana development by creating an account on GitHub.

github.com

What device you run it from?

Pink

 

[rhino]

What device you run it from?

Pink

A raspberry Pi but should work on other devices.