Add BLE support

[RoySalisbury]

Please add BLE support for this device...

Thanks

[syssi]

Implementation details: https://github.com/tgalarneau/bms/blob/main/jbdbms-4-socket-2temps.py#L180-L188

[syssi]

• Record a btsnoop capture to get a better understanding of the BLE traffic
• Identify available and used services, chars and handles
• Subscribe to notifications
• Request data periodically (0x03: cell info, 0x04: cell voltages)
• Receive notifications and pass the data to the decoder

[RoySalisbury]

Nice to see this being added. Let me know when you need someone to help test it. I still have 3 JBD BMS units that are running using a python program on my Raspberry Pi (via BLE). The other 5 I switched over to JK and ESPHome and they are working great.

[syssi]

I assume the BLE support is ready at the end of the week. I've made good progress today:

[19:30:56][I][jbd_bms_ble:135]: Request status notification
[19:30:56][D][jbd_bms_ble:385]: Write register: DD.A5.03.00.FF.FD.77 (7)
[19:30:56][D][jbd_bms_ble:100]: Notification received: DD.03.00.1D.05.59.00.00.6D.5E.6D.60.00.00.2C.7C.00.00.00.00 (20)
[19:30:56][D][jbd_bms_ble:100]: Notification received: 00.00.80.64.03.04.03.0B.6E.0B.6E.0B.6A.FA.F0.77 (16)
[19:30:58][I][jbd_bms_ble:135]: Request status notification
[19:30:58][D][jbd_bms_ble:385]: Write register: DD.A5.03.00.FF.FD.77 (7)
[19:30:58][D][jbd_bms_ble:100]: Notification received: DD.03.00.1D.05.59.00.00.6D.5E.6D.60.00.00.2C.7C.00.00.00.00 (20)
[19:30:58][D][jbd_bms_ble:100]: Notification received: 00.00.80.64.03.04.03.0B.6E.0B.6E.0B.6A.FA.F0.77 (16)

[syssi]

A first draft is ready. Please give it a try:

https://github.com/syssi/esphome-jbd-bms/blob/add-ble-support/esp32-ble-example.yaml

Just adjust the mac_address and flash the BLE example configuration to an ESP32 near your JBD BMS.

[RoySalisbury]

I have installed it to one of my ESP32's. Seems to be working fine. Great work. I will let it continue to operate and let you know how it works out.

[JeffyBeepBoop]

Tried it on a new d1 mini esp32 and I'm getting a compile error. This is the first time using the esp-idf framework. There were a couple download freezes along the way, retrying the install would seemingly allow the toolchain downloads to continue.

HARDWARE: ESP32 240MHz, 320KB RAM, 4MB Flash
 - framework-espidf @ 3.40302.0 (4.3.2) 
 - tool-cmake @ 3.16.9 
 - tool-ninja @ 1.10.2 
 - toolchain-riscv32-esp @ 8.4.0+2021r2-patch2 
 - toolchain-xtensa-esp32 @ 8.4.0+2021r2-patch2 
 - toolchain-xtensa-esp32s2 @ 8.4.0+2021r2-patch2
Reading CMake configuration...
-- The C compiler identification is unknown
-- The CXX compiler identification is unknown
-- The ASM compiler identification is unknown
-- Found assembler: /data/cache/platformio/packages/toolchain-xtensa-esp32/bin/xtensa-esp32-elf-gcc
-- Check for working C compiler: /data/cache/platformio/packages/toolchain-xtensa-esp32/bin/xtensa-esp32-elf-gcc
-- Check for working C compiler: /data/cache/platformio/packages/toolchain-xtensa-esp32/bin/xtensa-esp32-elf-gcc -- broken
-- Configuring incomplete, errors occurred!
See also "/data/jbd-bms-ble/.pioenvs/jbd-bms-ble/CMakeFiles/CMakeOutput.log".
See also "/data/jbd-bms-ble/.pioenvs/jbd-bms-ble/CMakeFiles/CMakeError.log".

fatal: not a git repository (or any parent up to mount point /)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).
CMake Error at /data/cache/platformio/packages/tool-cmake/share/cmake-3.16/Modules/CMakeTestCCompiler.cmake:60 (message):
  The C compiler

    "/data/cache/platformio/packages/toolchain-xtensa-esp32/bin/xtensa-esp32-elf-gcc"

  is not able to compile a simple test program.

  It fails with the following output:

    Change Dir: /data/jbd-bms-ble/.pioenvs/jbd-bms-ble/CMakeFiles/CMakeTmp
    
    Run Build Command(s):/data/cache/platformio/packages/tool-ninja/ninja cmTC_f5826 && [1/2] Building C object CMakeFiles/cmTC_f5826.dir/testCCompiler.c.obj
    FAILED: CMakeFiles/cmTC_f5826.dir/testCCompiler.c.obj 
    /data/cache/platformio/packages/toolchain-xtensa-esp32/bin/xtensa-esp32-elf-gcc   -mlongcalls -Wno-frame-address -o CMakeFiles/cmTC_f5826.dir/testCCompiler.c.obj   -c testCCompiler.c
    /bin/sh: 1: /data/cache/platformio/packages/toolchain-xtensa-esp32/bin/xtensa-esp32-elf-gcc: not found
    ninja: build stopped: subcommand failed.

[syssi]

The most critical issue is this one:

fatal: not a git repository (or any parent up to mount point /)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).

It looks like the build folder and your home directory aren't on the same filesystem. Could you try to build the YAML at a working directory in your home directory? If your home directory is a symlink please make sure echo $HOME doesn't use the symlink.

[sebastian@leonard ~] echo $HOME
/home/sebastian
[sebastian@leonard ~] ls -l /home 
lrwxrwxrwx 1 root root 15 13. Dez 2018  /home -> /srv/raid5/home
[sebastian@leonard ~] export HOME=/srv/raid5/home/sebastian
[sebastian@leonard /home/sebastian]