Verify JK-B2A8S20P support

[syssi]

https://github.com/jblance/mpp-solar/issues/224

Cell info response (290 bytes)

0xaa, 0xeb, 0x90, 0x02, 0x97, 0xeb, 0x0c, 0xe9, 0x0c, 0xe9, 0x0c, 0xe9, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x00, 0x00, 0xeb, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xaa, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc2, 0x00, 0xba, 0x00, 0xce, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x02, 0x00, 0xc0, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0xeb, 0xe0, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0xbb, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x05, 0x00, 0x00, 0xd7, 0x99, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1e

[syssi]

I've extracted the frames from the putty4.log: putty4-frames-hex.txt

Cell info (0x02) frame example (300 bytes):

0xaa 0xeb 0x90 0x02 0x95 0xed 0x0c 0xea 0x0c 0xe9 0x0c 0xe8 0x0c 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x0f 0x00 0x00 0x00 0xe9 0x0c 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xa5 0x33 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xcc 0x00 0xc8 0x00 0xda 0x00 0x04 0x00 0x00 0x00 0x00 0x00 0x03 0x6c 0x02 0x00 0xc0 0x45 0x04 0x00 0x00 0x00 0x00 0x00 0xeb 0xe0 0x01 0x00 0x00 0x00 0x00 0x00 0xc3 0x2f 0x23 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x07 0x00 0x00 0x00 0x00 0x00 0x23 0x05 0x00 0x00 0x00 0x00 0xbb 0x64 0x3b 0x40 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x01 0x00 0x05 0x00 0x00 0xa3 0xc4 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xc9 0x55

Settings (0x01) frame example (320 bytes):

0xaa 0xeb 0x90 0x01 0x9d 0x58 0x02 0x00 0x00 0x28 0x0a 0x00 0x00 0xb8 0x0b 0x00 0x00 0x10 0x0e 0x00 0x00 0x48 0x0d 0x00 0x00 0x05 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xc4 0x09 0x00 0x00 0xa8 0x61 0x00 0x00 0x1e 0x00 0x00 0x00 0x3c 0x00 0x00 0x00 0x40 0x0d 0x03 0x00 0x2c 0x01 0x00 0x00 0x3c 0x00 0x00 0x00 0x3c 0x00 0x00 0x00 0xd0 0x07 0x00 0x00 0xbc 0x02 0x00 0x00 0x58 0x02 0x00 0x00 0xbc 0x02 0x00 0x00 0x58 0x02 0x00 0x00 0x38 0xff 0xff 0xff 0x9c 0xff 0xff 0xff 0x84 0x03 0x00 0x00 0xbc 0x02 0x00 0x00 0x08 0x00 0x00 0x00 0x01 0x00 0x00 0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xc0 0x45 0x04 0x00 0xdc 0x05 0x00 0x00 0xb8 0x0b 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xd5 0xaa 0x55 0x90 0xeb 0xc8 0x01 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x44 0x55

Device info (0x03) frame example (320 bytes):

0xaa 0xeb 0x90 0x03 0xb8 0x4a 0x4b 0x2d 0x42 0x32 0x41 0x38 0x53 0x32 0x30 0x50 0x00 0x00 0x00 0x00 0x00 0x39 0x2e 0x58 0x00 0x00 0x00 0x00 0x00 0x39 0x2e 0x30 0x31 0x4d 0x33 0x00 0x00 0x08 0x2f 0x23 0x00 0x1d 0x00 0x00 0x00 0x4a 0x4b 0x2d 0x42 0x32 0x41 0x38 0x53 0x32 0x30 0x50 0x00 0x00 0x00 0x00 0x00 0x31 0x32 0x33 0x34 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x32 0x31 0x31 0x31 0x30 0x39 0x00 0x00 0x31 0x30 0x39 0x31 0x35 0x31 0x35 0x31 0x35 0x33 0x00 0x30 0x30 0x30 0x30 0x00 0x30 0x31 0x32 0x33 0x34 0x35 0x36 0x37 0x38 0x39 0x30 0x31 0x32 0x61 0x00 0x00 0x31 0x32 0x33 0x34 0x35 0x36 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x08 0xaa 0x55 0x90 0xeb 0xc8 0x01 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x44 0x55

[syssi]

      const uint8_t frame[300] = {
          0x55, 0xaa, 0xeb, 0x90, 0x02, 0x95, 0xed, 0x0c, 0xea, 0x0c, 0xe9, 0x0c, 0xe8, 0x0c, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x0f, 0x00, 0x00, 0x00, 0xe9, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa5, 0x33, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0xcc, 0x00, 0xc8, 0x00, 0xda, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x6c,
          0x02, 0x00, 0xc0, 0x45, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0xeb, 0xe0, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
          0xc3, 0x2f, 0x23, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x23, 0x05, 0x00, 0x00, 0x00, 0x00, 0xbb, 0x64, 0x3b, 0x40,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x05, 0x00, 0x00, 0xa3, 0xc4,
          0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc9};
      this->assemble_(frame, 300);

      const uint8_t frame2[320] = {
          0x55, 0xaa, 0xeb, 0x90, 0x01, 0x9d, 0x58, 0x02, 0x00, 0x00, 0x28, 0x0a, 0x00, 0x00, 0xb8, 0x0b, 0x00, 0x00,
          0x10, 0x0e, 0x00, 0x00, 0x48, 0x0d, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc4, 0x09, 0x00, 0x00, 0xa8, 0x61, 0x00, 0x00,
          0x1e, 0x00, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x00, 0x40, 0x0d, 0x03, 0x00, 0x2c, 0x01, 0x00, 0x00, 0x3c, 0x00,
          0x00, 0x00, 0x3c, 0x00, 0x00, 0x00, 0xd0, 0x07, 0x00, 0x00, 0xbc, 0x02, 0x00, 0x00, 0x58, 0x02, 0x00, 0x00,
          0xbc, 0x02, 0x00, 0x00, 0x58, 0x02, 0x00, 0x00, 0x38, 0xff, 0xff, 0xff, 0x9c, 0xff, 0xff, 0xff, 0x84, 0x03,
          0x00, 0x00, 0xbc, 0x02, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0xc0, 0x45, 0x04, 0x00, 0xdc, 0x05, 0x00, 0x00, 0xb8, 0x0b, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd5, 0xaa, 0x55, 0x90, 0xeb, 0xc8, 0x01,
          0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x44};
      this->assemble_(frame2, 320);

      const uint8_t frame3[320] = {
          0x55, 0xaa, 0xeb, 0x90, 0x03, 0xb8, 0x4a, 0x4b, 0x2d, 0x42, 0x32, 0x41, 0x38, 0x53, 0x32, 0x30, 0x50, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x39, 0x2e, 0x58, 0x00, 0x00, 0x00, 0x00, 0x00, 0x39, 0x2e, 0x30, 0x31, 0x4d, 0x33,
          0x00, 0x00, 0x08, 0x2f, 0x23, 0x00, 0x1d, 0x00, 0x00, 0x00, 0x4a, 0x4b, 0x2d, 0x42, 0x32, 0x41, 0x38, 0x53,
          0x32, 0x30, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00, 0x31, 0x32, 0x33, 0x34, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x32, 0x31, 0x31, 0x31, 0x30, 0x39, 0x00, 0x00, 0x31, 0x30, 0x39, 0x31,
          0x35, 0x31, 0x35, 0x31, 0x35, 0x33, 0x00, 0x30, 0x30, 0x30, 0x30, 0x00, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
          0x36, 0x37, 0x38, 0x39, 0x30, 0x31, 0x32, 0x61, 0x00, 0x00, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0xaa, 0x55, 0x90, 0xeb, 0xc8, 0x01,
          0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x44};
      this->assemble_(frame3, 320);

[13:47:04][D][sensor:125]: 'jk-bms cell voltage 1': Sending state 3.30900 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 1': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 2': Sending state 3.30600 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 2': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 3': Sending state 3.30500 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 3': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 4': Sending state 3.30400 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 4': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 5': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 5': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 6': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 6': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 7': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 7': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 8': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 8': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 9': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 9': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 10': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 10': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 11': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 11': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 12': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 12': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 13': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 13': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 14': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 14': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 15': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 15': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 16': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 16': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 17': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 17': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 18': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 18': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 19': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 19': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 20': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 20': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 21': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 21': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 22': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 22': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 23': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 23': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell voltage 24': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms cell resistance 24': Sending state 0.00000 Ω with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms min cell voltage': Sending state 3.30400 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms max cell voltage': Sending state 3.30900 V with 3 decimals of accuracy
[13:47:04][I][jk_bms_ble:409]: Enabled cells: 0F 00 00 00 (0xFF 0x1F: 13 cells, 0xFF 0xFF: 16 cells)
[13:47:04][D][sensor:125]: 'jk-bms average cell voltage': Sending state 3.30500 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms delta cell voltage': Sending state 0.00000 V with 3 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms max voltage cell': Sending state 1.00000  with 0 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms min voltage cell': Sending state 1.00000  with 0 decimals of accuracy
[13:47:04][I][jk_bms_ble:428]: Unknown112: 00 00
[13:47:04][I][jk_bms_ble:430]: Wire resistance warning: 00 00 00 00
[13:47:04][D][sensor:125]: 'jk-bms total voltage': Sending state 13.22100 V with 2 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms current': Sending state 0.00000 A with 2 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms power': Sending state 0.00000 W with 2 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms charging power': Sending state 0.00000 W with 2 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms discharging power': Sending state 0.00000 W with 2 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms temperature sensor 1': Sending state 20.40000 °C with 0 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms temperature sensor 2': Sending state 20.00000 °C with 0 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms power tube temperature': Sending state 21.80000 °C with 0 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms errors bitmask': Sending state 38146.00000  with 0 decimals of accuracy
[13:47:04][D][text_sensor:067]: 'jk-bms errors': Sending state 'Charge Undertemperature;Error 0x01 0x00;Cell count is not equal to settings;Cell Overvoltage;Error 0x80 0x00'                                                                                                                                                                 
[13:47:04][D][sensor:125]: 'jk-bms balancing current': Sending state 0.00000 A with 2 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms state of charge': Sending state 0.00000 % with 0 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms capacity remaining': Sending state 158.72301 Ah with 0 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms total battery capacity setting': Sending state 280.00000 Ah with 0 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms charging cycles': Sending state 0.00000  with 0 decimals of accuracy
[13:47:04][D][sensor:125]: 'jk-bms total charging cycle capacity': Sending state 123115.00000  with 0 decimals of accuracy
[13:47:04][I][jk_bms_ble:507]: Unknown158: 00 00 (always 0x64 0x00?)
[13:47:04][I][jk_bms_ble:510]: Unknown160: 00 00 (always 0xC5 0x09?)
[13:47:04][D][sensor:125]: 'jk-bms total runtime': Sending state 2305987.00000 s with 0 decimals of accuracy
[13:47:04][D][text_sensor:067]: 'jk-bms total runtime formatted': Sending state '26d 16h'
[13:47:04][I][jk_bms_ble:522]: Unknown168: 00.00.00.00.00.00.00.00.00.00.00.00.00.00.07.00.00.00.00.00.23.05.00.00.00.00.BB.64.3B.40.00.00.00.00.00.00.00.00.00.00.00.01.00.05.00.00 (46)                                                                                                                                                     
[13:47:04][I][jk_bms_ble:536]: Unknown189: 05 00
[13:47:04][I][jk_bms_ble:539]: Unknown192: 00
[13:47:04][I][jk_bms_ble:541]: Unknown193: 00 BB (0x00 0x8D)
[13:47:04][I][jk_bms_ble:543]: Unknown195: 64 3B (0x21 0x40)
[13:47:04][I][jk_bms_ble:748]: Settings frame (320 bytes):
[13:47:04][I][jk_bms_ble:774]:   Unknown6: 0.600000
[13:47:04][I][jk_bms_ble:776]:   Cell UVP: 2.600000 V
[13:47:04][I][jk_bms_ble:778]:   Cell UVPR: 3.000000 V
[13:47:04][I][jk_bms_ble:780]:   Cell OVP: 3.600000 V
[13:47:04][I][jk_bms_ble:782]:   Cell OVPR: 3.400000 V
[13:47:04][I][jk_bms_ble:784]:   Balance trigger voltage: 0.005000 V
[13:47:04][I][jk_bms_ble:790]:   Power off voltage: 2.500000 V
[13:47:04][I][jk_bms_ble:792]:   Max. charge current: 25.000002 A
[13:47:04][I][jk_bms_ble:794]:   Charge OCP delay: 30.000000 s
[13:47:04][I][jk_bms_ble:796]:   Charge OCP recovery delay: 60.000000 s
[13:47:04][I][jk_bms_ble:798]:   Max. discharge current: 200.000015 A
[13:47:04][I][jk_bms_ble:800]:   Discharge OCP recovery delay: 300.000000 s
[13:47:04][I][jk_bms_ble:802]:   Discharge OCP recovery delay: 60.000000 s
[13:47:04][I][jk_bms_ble:804]:   SCP recovery time: 60.000000 s
[13:47:04][I][jk_bms_ble:806]:   Max. balance current: 2.000000 A
[13:47:04][I][jk_bms_ble:808]:   Charge OTP: 70.000000 °C
[13:47:04][I][jk_bms_ble:810]:   Charge OTP recovery: 60.000000 °C
[13:47:04][I][jk_bms_ble:812]:   Discharge OTP: 70.000000 °C
[13:47:04][I][jk_bms_ble:814]:   Discharge OTP recovery: 60.000000 °C
[13:47:04][I][jk_bms_ble:816]:   Charge UTP: 429496704.000000 °C
[13:47:04][I][jk_bms_ble:818]:   Charge UTP recovery: 429496736.000000 °C
[13:47:04][I][jk_bms_ble:820]:   MOS OTP: 90.000000 °C
[13:47:04][I][jk_bms_ble:822]:   MOS OTP recovery: 70.000000 °C
[13:47:04][I][jk_bms_ble:824]:   Cell count: 8.000000
[13:47:04][I][jk_bms_ble:827]:   Charge switch: on
[13:47:04][I][jk_bms_ble:831]:   Discharge switch: on
[13:47:05][I][jk_bms_ble:835]:   Balancer switch: off
[13:47:05][I][jk_bms_ble:839]:   Nominal battery capacity: 280.000000 Ah
[13:47:05][I][jk_bms_ble:841]:   Unknown134: 1.500000
[13:47:05][I][jk_bms_ble:843]:   Unknown138: 3.000000
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 1: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 2: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 3: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 4: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 5: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 6: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 7: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 8: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 9: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 10: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 11: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 12: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 13: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 14: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 15: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 16: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 17: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 18: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 19: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 20: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 21: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 22: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 23: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:873]:   Con. wire resistance 24: 0.000000 Ohm
[13:47:05][I][jk_bms_ble:988]: Device info frame (320 bytes):
[13:47:05][I][jk_bms_ble:1040]:   Vendor ID: JK-B2A8S20P
[13:47:05][I][jk_bms_ble:1041]:   Hardware version: 9.X
[13:47:05][I][jk_bms_ble:1042]:   Software version: 9.01M3
[13:47:05][I][jk_bms_ble:1043]:   Uptime: 2305800 s
[13:47:05][I][jk_bms_ble:1044]:   Power on count: 29
[13:47:05][I][jk_bms_ble:1045]:   Device name: JK-B2A8S20P
[13:47:05][I][jk_bms_ble:1046]:   Device passcode: 1234
[13:47:05][I][jk_bms_ble:1047]:   Manufacturing date: 211109
[13:47:05][I][jk_bms_ble:1048]:   Serial number: 1091515153
[13:47:05][I][jk_bms_ble:1049]:   Passcode: 0000
[13:47:05][I][jk_bms_ble:1050]:   User data: 0123456789012a
[13:47:05][I][jk_bms_ble:1051]:   Setup passcode: 123456

[syssi]

@EasilyBoredEngineer FYI. Most values are fine. Some are a bit off.

Invalid or strange values:

1. errors bitmask: 0b1001010100000010 (Charge Undertemperature;Error 0x01 0x00;Cell count is not equal to settings;Cell Overvoltage;Error 0x80 0x00')
2. State of charge 0%
3. Charge UTP: 429496704.000000 °C (signed int?)
4. Charge UTP recovery: 429496736.000000 °C (signed int?)
5. Cell count: 8.000000 (setting incorrect?)

[EasilyBoredEngineer]

Hi @syssi, as requested please find attached app screenshots and updated log file. Note:-

1. I've updated to 4S in the app.
2. (per the output of jblance - SOC 0% makes no sense, actually 68% - yours gets this right)
3. (per the output of jblance - Resistance of 0 makes no sense - see app. - yours gets it right)
4. UVP value makes no sense - actually -20C.

[syssi]

Previous (57090d = 1101111100000010b):

- Charge Undertemperature
- Error 0x01 0x00
- Error 0x02 0x00
- Cell count is not equal to settings
- Error 0x08 0x00
- Cell Overvoltage
- Error 0x40 0x00
- Error 0x80 0x00

After (43605d = 1010101001010101b): 

- Charge Overtemperature
- Error 0x00 0x04
- Error 0x00 0x10
- Error 0x00 0x40
- Error 0x02 0x00
- Error 0x08 0x00
- Error 0x20 0x00
- Error 0x80 0x00

[syssi]

If you increase the log level by:

logger:
  level: VERY_VERBOSE
  logs:
    scheduler: DEBUG
    component: DEBUG
    esp32_ble_tracker: DEBUG
    sensor: DEBUG

you can see the raw traffic if you like.

[EasilyBoredEngineer]

Thanks @syssi -

(deleted hex log above as it was mangled - wasn't obtained properly so was showing the hex in the ascii section)

Very verbose logs attached, captured right now after the 4s change. logs_testesp_logs (3).txt

[EasilyBoredEngineer]

reupload of hex dump response, fyi.

This is how the BMS responds to the following command:-

AA5590EB96000000000000000000000000000010

commandResponse.txt

[syssi]

I've fixed the decoding of the "under temperature protection" and "under temperature protection recovery". It's a signed integer now.

[EasilyBoredEngineer]

@syssi

I've fixed the decoding of the "under temperature protection" and "under temperature protection recovery". It's a signed integer now.

Thankyou! Now I just have to remember how to synchronise git..... :)

[syssi]

Let's remove this parts from your config yaml:

    cell_voltage_5:
      name: "${name} cell voltage 5"
    cell_voltage_6:
      name: "${name} cell voltage 6"
    cell_voltage_7:
      name: "${name} cell voltage 7"
[...]
    cell_voltage_24:
      name: "${name} cell voltage 24"

and

    cell_resistance_5:
      name: "${name} cell resistance 5"
    cell_resistance_6:
      name: "${name} cell resistance 6"
    cell_resistance_7:
      name: "${name} cell resistance 7"
[...]
    cell_resistance_24:
      name: "${name} cell resistance 24"

[syssi]

@EasilyBoredEngineer If you use this project as external_component you don't need a clone of this repository. Just use/keep/edit the esp32-ble-example.yaml. This section:

substitutions:
  name: jk-bms
  external_components_source: github://syssi/esphome-jk-bms@main

external_components:
  - source: ${external_components_source}
    refresh: 0s

clones the main branch of this repository every time (refresh: 0s). You have just to recompile & flash again.

[EasilyBoredEngineer]

great! Thankyou. Yaml changes made.

Attached is new log and a screenshot.

Note the circled items do nothing when clicked.

logs_testesp_logs (4).txt

[EasilyBoredEngineer]

additional screenshots attached - looking good!

[syssi]

Are you sure the buttons doesn't work? Because it's not documented it try to explain what's happing:

If you press the "retrieve settings button" the 0x96 request is sent to the BMS. The BMS should beep (acknowledge the command) and respond with a settings frame (frame_type: 0x01). The settings are written with log_level INFO to the log and should look something like this:

[13:47:04][I][jk_bms_ble:748]: Settings frame (320 bytes):
[13:47:04][I][jk_bms_ble:774]:   Unknown6: 0.600000
[13:47:04][I][jk_bms_ble:776]:   Cell UVP: 2.600000 V
[13:47:04][I][jk_bms_ble:778]:   Cell UVPR: 3.000000 V
[13:47:04][I][jk_bms_ble:780]:   Cell OVP: 3.600000 V
[13:47:04][I][jk_bms_ble:782]:   Cell OVPR: 3.400000 V
[13:47:04][I][jk_bms_ble:784]:   Balance trigger voltage: 0.005000 V
[13:47:04][I][jk_bms_ble:790]:   Power off voltage: 2.500000 V
[13:47:04][I][jk_bms_ble:792]:   Max. charge current: 25.000002 A
[13:47:04][I][jk_bms_ble:794]:   Charge OCP delay: 30.000000 s
[13:47:04][I][jk_bms_ble:796]:   Charge OCP recovery delay: 60.000000 s
[13:47:04][I][jk_bms_ble:798]:   Max. discharge current: 200.000015 A
[13:47:04][I][jk_bms_ble:800]:   Discharge OCP recovery delay: 300.000000 s

If you pree the "retrieve device info" button the BMS should beep and the component should write this to the log:

[13:47:05][I][jk_bms_ble:988]: Device info frame (320 bytes):
[13:47:05][I][jk_bms_ble:1040]:   Vendor ID: JK-B2A8S20P
[13:47:05][I][jk_bms_ble:1041]:   Hardware version: 9.X
[13:47:05][I][jk_bms_ble:1042]:   Software version: 9.01M3
[13:47:05][I][jk_bms_ble:1043]:   Uptime: 2305800 s
[13:47:05][I][jk_bms_ble:1044]:   Power on count: 29
[13:47:05][I][jk_bms_ble:1045]:   Device name: JK-B2A8S20P
[13:47:05][I][jk_bms_ble:1046]:   Device passcode: 1234
[13:47:05][I][jk_bms_ble:1047]:   Manufacturing date: 211109
[13:47:05][I][jk_bms_ble:1048]:   Serial number: 1091515153
[13:47:05][I][jk_bms_ble:1049]:   Passcode: 0000
[13:47:05][I][jk_bms_ble:1050]:   User data: 0123456789012a
[13:47:05][I][jk_bms_ble:1051]:   Setup passcode: 123456

Could you test again? Does it work or doesn't beep the BMS?

[EasilyBoredEngineer]

@syssi - question for you - if I wished to adapt your code to send the bms data out as a struct via serial IO, as well as sending to home assistant, which part of the code would be best to work on / fork?

[EasilyBoredEngineer]

If you press the "retrieve settings button" the 0x96 request is sent to the BMS. The BMS should beep (acknowledge the command) and respond with a settings frame (frame_type: 0x01). The settings are written with log_level INFO to the log and should look something like this:

No such section noted in log at very verbose level when / after pressing button. Accessing remotely at the moment so cannot confirm whether the BMS beeps or not, apologies, will revisit when next to the ESP.

[syssi]

This is the most important file about the JK02 (and JK04 protocol): https://github.com/syssi/esphome-jk-bms/blob/main/components/jk_bms_ble/jk_bms_ble.cpp

Take a look at the decode_ method (to understand the different known frame types). Check out the decode_jk02_cell_info_ to monitor the most important values periodically.

If the Android app connects to the BMS the device info frame is requested first: https://github.com/syssi/esphome-jk-bms/blob/main/components/jk_bms_ble/jk_bms_ble.cpp#L159

The second step is to request the settings + enable the periodic sendout of the cell info frame: https://github.com/syssi/esphome-jk-bms/blob/main/components/jk_bms_ble/jk_bms_ble.cpp#L275

Please make sure between the first request (0x97) and the second (0x96) must be a gap of ~0.5sec.

[EasilyBoredEngineer]

Thankyou very much @syssi - really appreciated :)

FYI - just changed log level to INFO and CONFIRM - both buttons work.

attached log shows the relevant responses. logs_testesp_upload.txt

[syssi]

Lucky guy! I was already afraid that you might have damaged the RX pin of your BMS or Jikong has introduced some encryption / verification bits at the random part of the request to avoid unsecured/unauthorized traffic.

[EasilyBoredEngineer]

Lucky guy!

Ha! So was I!!

Nope, looks like all is working well now with your package..

Now that's not to say that I haven't possibly killed something else on the bms during my 'investigations' (I did make a big spark with my multimeter probe down towards the mosfet end at one stage - lol) - but I'll know that soon enough :)

Thanks again for all your help - close as successful if you wish?

[syssi]

One piece of the puzzle is missing unfortunately: The meaning of each bit of the error bitmask of your device is unknown. Your android app doesn't show a red error message anymore but some bits of the error bitmask are still 1. On other BMS models all bits are 0 if everything is fine / no warning shown.

[EasilyBoredEngineer]

Ok - understood. I've just gone down to the office and tried to find a way to factory reset the bms, but alas on my app there is no such option.. another potential cause may be that I have strange private user data (0123456789012), and can't change it using the android app - wondering if that might be bleeding over into the next byte...

I'll try to do some investigations over the coming days:-

EBE 'to do':-

1. Disconnect my friend Dave's 'lytefyba' cell management units from my 8s bank and fully charge using the jk in 8s configuration instead of the present workaround 4s.
2. Try to set 'strange' user Private Data back to 0000 using @bullar suggested command structure
3. Fork syssi repository and implement rcvd structure via ble>>uart or i2c to allow processing by my existing bms.
4. reconnect via piggy back method and try and get further information for syssi re _RST pin operation and its relevance to #107

[syssi]

I've seen another user/log yesterday with the same strange error bitmask. I assume everything is fine with your BMS and something has changed here.

[21:51:34][V][text_sensor:016]: 'e-kart errors': Received new state Charge Overtemperature;Error 0x00 0x04;Error 0x00 0x10;Error 0x00 0x40;Error 0x02 0x00;Error 0x08 0x00;Error 0x20 0x00;Error 0x80 0x00
[21:51:34][D][text_sensor:067]: 'e-kart errors': Sending state 'Charge Overtemperature;Error 0x00 0x04;Error 0x00 0x10;Error 0x00 0x40;Error 0x02 0x00;Error 0x08 0x00;Error 0x20 0x00;Error 0x80 0x00'
[21:51:34][VV][api.service:174]: send_text_sensor_state_response: TextSensorStateResponse {
  key: 1889080433
  state: 'Charge Overtemperature;Error 0x00 0x04;Error 0x00 0x10;Error 0x00 0x40;Error 0x02 0x00;Error 0x08 0x00;Error 0x20 0x00;Error 0x80 0x00'
  missing_state: NO
}

How to identify/reverse engineer the new error bitmask:

1. Declare the pattern above as the "No errors" state
2. Try to trigger every error manually. F.e. cool down one temperature sensor to the UTP. You can increase the setting beforehand so you can reach the limit easily.
3. Next bit is the over temperature protect. Change the setting slightly above room temperature and warm up the temperature sensor with your body temperature. Another bit at the error bitmask should flip from 0 to 1 this time. Note down the position.
4. Change the cell overvoltage setting to something below the current cell voltage of your pack. Another bit should flip. Note down the position.
5. Change the undervoltage setting
6. Change the battery strings settings to a wrong setting (5S). You should see the error message about a wrong battery setting at your app. A bit of the error bitmask should have flipped again.

[syssi]

New finding: The error bitmask of the JK02 protocol has always been broken / isn't implemented properly. I can reproduce the issue with my BMS model too.

[syssi]

I've fixed the error bitmask. Just some error bits are well known but may be we can find more in future:

https://github.com/syssi/esphome-jk-bms/blob/main/components/jk_bms_ble/jk_bms_ble.cpp#L455-L479