Bluetooth-Connection to BMS stops working

[abc2006]

Hi, my post is possibly related to #659 or #608. Please note that I am not a native English speaker, so my statements may not be 100% accurately translated. (Translation provided by ChatGPT)

I am using two ESP32s to connect two JK-BMS:

JK-BMS <-> Bluetooth <-> ESP32 <-> WiFi <-> MQTT Server (Mosquitto, not related to HomeAssistant or anything else)

This setup is duplicated, see the configurations jk00[12]-esp32-ble-v14.yaml.orig:

jk002-esp32-ble-v14.yaml.orig.txt
jk001-esp32-ble-v14.yaml.orig.txt

Sometimes, one or both of the connections stop working, so I don't receive any new values in my MQTT server. A power cycle of the ESP32 fixes it, and then it works again.

Today, I did some research and found the following message:

[W][component:237]: Component esp32_ble took a long time for an operation (965 ms).
[W][component:238]: Components should block for at most 30 ms.

To reduce the load, I changed the configurations and removed any unused datapoints (e.g., I have 16 cells, so I removed the voltage and resistance datapoints for cells 17 to 24). As a result, the "long time" dropped to around 700 ms:

jk002-esp32-ble-v14.yaml.txt
jk001-esp32-ble-v14.yaml.txt

[W][component:237]: Component esp32_ble took a long time for an operation (696 ms).
[W][component:238]: Components should block for at most 30 ms.

I also pulled the updates from GitHub and updated the Python files on my computer, before recompiling and updating with the new configurations.

Just now, I was watching the log outputs a bit, and I saw this message:

[14:24:58][D][jk_bms_ble:599]: Temperature sensor 4: 0.0 °C
[14:24:58][D][jk_bms_ble:600]: Temperature sensor 5: 0.0 °C
[14:24:58][D][jk_bms_ble:601]: Time enter sleep: 0 s
[14:24:58][D][jk_bms_ble:602]: PCL Module State: OFF
[14:24:58][W][component:237]: Component esp32_ble took a long time for an operation (695 ms).
[14:24:58][W][component:238]: Components should block for at most 30 ms.
[14:24:59][D][esphome.ota:117]: Starting update from 192.168.243.253...
[14:24:59][W][component:157]: Component esphome.ota set Warning flag: unspecified
[14:24:59][D][switch:016]: 'jk-bms-001 enable bluetooth connection' Turning OFF.
[14:24:59][I][ble_client:043]: [C8:47:8C:E8:3E:CE] Disabling BLE client.
[14:24:59][I][esp32_ble_client:084]: [0] [C8:47:8C:E8:3E:CE] Disconnecting.
[14:24:59][D][switch:055]: 'jk-bms-001 enable bluetooth connection': Sending state OFF
[14:24:59][D][main:2757]: BLE connection suspended for OTA update
[14:24:59][W][esphome.ota:129]: Magic bytes do not match! 0x47-0x45-0x54-0x20-0x2F
[14:24:59][E][component:164]: Component esphome.ota set Error flag: unspecified
[14:24:59][D][esp-idf:000][BTU_TASK]: W (5637211) BT_HCI: hcif disc complete: hdl 0x0, rsn 0x16
[14:24:59][D][esp-idf:000][BTC_TASK]: E (5637222) BT_APPL: BTA_GATTC_DeregisterForNotifications registration not found bd_addr:c8:47:8c:e8:3e:ce
[14:25:16][W][component:170]: Component mqtt cleared Warning flag
[14:25:16][I][mqtt:291]: MQTT Connected!
[14:25:18][I][app:062]: setup() finished successfully!
[14:25:18][I][app:100]: ESPHome version 2024.12.4 compiled on Jan 25 2025, 12:50:41
[14:25:18][I][app:102]: Project syssi.esphome-jk-bms version 2.1.0
[14:25:18][C][wifi:600]: WiFi:

However, I didn't start an update, I was just watching the OTA log output. Is this error known? If so, what can I do? If not, how can I provide more information? I will keep an eye on it to see if this error occurs more frequently.

This is my Hardware and software-versions:

Processing jk-bms-001 (board: wemos_d1_mini32; framework: espidf; platform: https://github.com/pioarduino/platform-espressif32.git#51.03.07)
---------------------------------------------------------------------------------------------------------------------------------------------------------------
HARDWARE: ESP32 240MHz, 320KB RAM, 4MB Flash
 - framework-espidf @ 3.50105.0 (5.1.5) 
 - tool-cmake @ 3.21.3 
 - tool-esptoolpy @ 4.8.1 
 - tool-mklittlefs @ 3.2.0 
 - tool-ninja @ 1.7.1 
 - tool-riscv32-esp-elf-gdb @ 12.1.0+20221002 
 - tool-xtensa-esp-elf-gdb @ 12.1.0+20221002 
 - toolchain-esp32ulp @ 2.35.0-20220830 
 - toolchain-xtensa-esp32 @ 12.2.0+20230208

Thanks for your help,
Stephan