Batteread

Read status data from certain models of LiFePO4 Battery Management Systems over Bluetooth Low Energy

Tested with a 400ah 24v battery manufactured by https://www.li-gen.net/ and sold around the year 2022.

The BMS has a BLE interface. On top of that the NordicUART protocol is used for serial communication. On top of that there seems to be a proprietary request-response protocol which I have attempted to partially reverse engineer.

Currently the following data can be accessed:

• State of charge (%)
• Residual capacity (Ah)
• Cycles (count)
• Cell voltages (v)
• Battery voltage (v)

Example

# use std::time::Duration;
#
# #[tokio::main]
# pub async fn main(){
    let mut battery_client = batteread::BatteryClient::new_default_name().await.unwrap();
    loop {
        let battery_state = battery_client.fetch_state().await.unwrap();
        println!("{battery_state:?}");
        tokio::time::sleep(Duration::from_secs(5)).await;
    }
# }