Add CRC check of the settings frame

CRC16 polynom:

[
  0, 50585, 52907, 2866, 55503, 7510, 5732, 54269, 62471, 12702, 15020, 65333, 
  11464, 59729, 57955, 10234, 44439, 26638, 25404, 42661, 30040, 45249, 48115, 
  32362, 22928, 39945, 38715, 21154, 33119, 17606, 20468, 35437, 23342, 40631, 
  38277, 20508, 33761, 18040, 19786, 35027, 44841, 27312, 24962, 42011, 30694, 
  45695, 47437, 31956, 63161, 13088, 14354, 64907, 11894, 60399, 57565, 9540, 
  702, 50983, 52245, 2444, 55921, 8168, 5338, 53571, 62405, 13916, 15726, 63735, 
  11018, 61075, 58785, 8248, 1986, 49755, 51561, 3312, 57101, 6804, 4518, 54335, 
  24146, 39883, 37113, 21856, 34461, 17156, 18486, 36271, 43605, 28620, 25854, 
  41319, 29338, 46851, 48177, 31144, 43243, 28018, 26176, 41945, 28708, 46525, 
  48783, 31510, 23788, 39285, 37447, 22494, 33827, 16826, 19080, 36625, 1404, 
  49381, 52183, 3662, 56755, 6186, 4888, 54913, 61819, 13538, 16336, 64073, 10676, 
  60461, 59167, 8838, 41491, 26506, 27832, 43297, 31452, 48965, 46199, 29166, 
  22036, 37773, 39103, 23846, 36571, 19266, 16496, 34281, 3972, 51741, 49455, 
  1206, 55115, 4818, 6624, 56441, 64387, 15898, 13608, 61617, 9036, 59093, 60903, 
  10366, 63805, 15524, 14230, 61967, 8690, 58475, 61273, 10944, 3386, 51363, 
  50065, 1544, 54773, 4204, 7006, 57031, 21674, 37171, 39425, 24472, 35941, 18940, 
  17102, 34647, 41133, 25908, 28166, 43935, 30818, 48635, 46793, 29520, 20950, 
  37967, 40829, 23268, 35097, 19584, 18354, 33323, 42449, 24648, 27514, 44771, 
  32030, 47239, 46005, 30252, 64577, 14808, 13034, 63347, 9358, 57623, 59941, 
  12220, 2118, 52703, 50925, 884, 53385, 5392, 7714, 56251, 2808, 53089, 50259, 
  458, 53815, 6062, 7324, 55557, 65279, 15206, 12372, 62925, 9776, 58281, 59547, 
  11522, 42863, 25334, 27076, 44125, 32672, 47673, 45323, 29842, 21352, 38641, 
  40387, 22618, 35751, 20030, 17676, 32917
];

static const uint16_t crcTable[256] = {
    0x0000, 0xC5A9, 0xCE9B, 0x0B32, 0xD8DF, 0x1D56, 0x1664, 0xD3CD,
    0xF3E7, 0x364E, 0x3D7C, 0xF8D5, 0x2CC8, 0xE961, 0xE253, 0x27FA,
    0xAD87, 0x682E, 0x631C, 0xA6B5, 0x7558, 0xB0F1, 0xBBC3, 0x7E6A,
    0x5980, 0x9C29, 0x971B, 0x52B2, 0x815F, 0x44F6, 0x4FC4, 0x8A6D,
    0x5B2E, 0x9E87, 0x95B5, 0x501C, 0x83F1, 0x4658, 0x4D6A, 0x88C3,
    0xA8C9, 0x6D60, 0x6652, 0xA3FB, 0x7016, 0xB5BF, 0xBE8D, 0x7B24,
    0xF6A9, 0x3300, 0x3832, 0xFD9B, 0x2E76, 0xEBDF, 0xE0ED, 0x2544,
    0x054E, 0xC0E7, 0xCBD5, 0x0E7C, 0xDD91, 0x1838, 0x130A, 0xD6A3,
    0xB65C, 0x73F5, 0x78C7, 0xBD6E, 0x6E83, 0xAB2A, 0xA018, 0x65B1,
    0x45BB, 0x8012, 0x8B20, 0x4E89, 0x9D64, 0x58CD, 0x53FF, 0x9656,
    0x1BDB, 0xDE72, 0xD540, 0x10E9, 0xC304, 0x06AD, 0x0D9F, 0xC836,
    0xE83C, 0x2D95, 0x26A7, 0xE30E, 0x30E3, 0xF54A, 0xFE78, 0x3BD1,
    0xED72, 0x28DB, 0x23E9, 0xE640, 0x35AD, 0xF004, 0xFB36, 0x3E9F,
    0x1E95, 0xDB3C, 0xD00E, 0x15A7, 0xC64A, 0x03E3, 0x08D1, 0xCD78,
    0x40F5, 0x855C, 0x8E6E, 0x4BC7, 0x982A, 0x5D83, 0x56B1, 0x9318,
    0xB312, 0x76BB, 0x7D89, 0xB820, 0x6BCD, 0xAE64, 0xA556, 0x60FF,
    0x0F80, 0xCA29, 0xC11B, 0x04B2, 0xD75F, 0x12F6, 0x19C4, 0xDC6D,
    0xFC67, 0x39CE, 0x32FC, 0xF755, 0x24B8, 0xE111, 0xEA23, 0x2F8A,
    0xA207, 0x67AE, 0x6C9C, 0xA935, 0x7AD8, 0xBF71, 0xB443, 0x71EA,
    0x51E0, 0x9449, 0x9F7B, 0x5AD2, 0x893F, 0x4C96, 0x47A4, 0x820D,
    0x54AE, 0x9107, 0x9A35, 0x5F9C, 0x8C71, 0x49D8, 0x42EA, 0x8743,
    0xA749, 0x62E0, 0x69D2, 0xAC7B, 0x7F96, 0xBA3F, 0xB10D, 0x74A4,
    0xF929, 0x3C80, 0x37B2, 0xF21B, 0x21F6, 0xE45F, 0xEF6D, 0x2AC4,
    0x0ACE, 0xCF67, 0xC455, 0x01FC, 0xD211, 0x17B8, 0x1C8A, 0xD923,
    0xB9DC, 0x7C75, 0x7747, 0xB2EE, 0x6103, 0xA4AA, 0xAF98, 0x6A31,
    0x4A3B, 0x8F92, 0x84A0, 0x4109, 0x92E4, 0x574D, 0x5C7F, 0x99D6,
    0x145B, 0xD1F2, 0xDAC0, 0x1F69, 0xCC84, 0x092D, 0x021F, 0xC7B6,
    0xE7BC, 0x2215, 0x2927, 0xEC8E, 0x3F63, 0xFACA, 0xF1F8, 0x3451,
    0xE2F2, 0x275B, 0x2C69, 0xE9C0, 0x3A2D, 0xFF84, 0xF4B6, 0x311F,
    0x1115, 0xD4BC, 0xDF8E, 0x1A27, 0xC9CA, 0x0C63, 0x0751, 0xC2F8,
    0x4F75, 0x8ADC, 0x81EE, 0x4447, 0x97AA, 0x5203, 0x5931, 0x9C98,
    0xBC92, 0x793B, 0x7209, 0xB7A0, 0x644D, 0xA1E4, 0xAAD6, 0x6F7F
};

uint16_t crc16(const uint8_t* data, size_t size) {
    uint16_t crc = 16;
    size_t i;

    for (i = 0; i < size; ++i) {
        crc = (crc << 8) ^ crcTable[((crc >> 7) ^ data[i]) & 0xFF];
    }

    return (crc & 0xFFFF) * 2;
}

syssi / esphome-lolan-bms

Add CRC check of the settings frame #20