Document Theragun protocol

[blackspherefollower]

BLE Names:

ID	Name	OldID	Gen	Type	MinFirmware	MinSpeed	MaxSpeed	Speeds
pro	Pro		4	Theragun	2.1.6	0	0	3616
elite	Elite		4	Theragun	2.1.6	0	0	3616
prime	Prime	liv2	4	Theragun	2.0.4	0	0	3584
fr01	Wave Roller		4	Roller	1.0.5	1	5	150,275,350,415,470
WaveSolo	Wave Solo		4	Roller		1	3	1920,2520,3120
WaveDuo	Wave Duo		4	Roller		1	5	30,45,65,80,100

UUIDs: Service: 0xffe0 Rx: 0xffe1 Tx: 0xffe2

   public final byte checksum(byte[] a, int offset, int length) {
        int sum = 0;
        for (int i = 0; i < length; i++) {
            sum += bArr[i + offset];
        }
        return sum & 255;
    }

   # write with response
   private final byte[] setSpeed(int mode, int rpm) {
        int length = 7;
        byte[] arr = new byte[7];
        bArr[0] = -86;
        bArr[2] = 1;
        if (mode != 1) {
            length = 4;
        } else {
            bArr[4] = (byte) ((65280 & rpm) >> 8);
            bArr[5] = (byte) (rpm & 255);
            bArr[6] = (byte) 3;
        }
        bArr[3] = 3;
        bArr[1] = checksum(arr, 2, length - 2);
        return arr;
    }

   # write without response
   private final byte[] requestVersion() {
        return new byte[]{-86, 32, 32, 0};
    }

   # write with response
   private final byte[] requestStatus() {
        byte[] arr = new byte[4];
        bArr[0] = -86;
        bArr[2] = 16;
        bArr[3] = 0;
        bArr[1] = checksum(arr, 2, 2);
        return arr;
    }

  public final void parseNotification(byte[] arr) {
        if (arr[0] == 187 && checksum(arr, 2, arr.length - 2) == arr[1]) {
            if (arr[2]== 16) {
                int running = arr[4];
                int speed = arr[13] << 8 | arr[14]);
                int force = arr[7] << 8 | arr[8];
                int battery = arr[19];
            } else if (arr[2]== 32) {
                int version = arr[12] << 8 | arr[13];
                int major = version / 100;
                int minor = (version % 100) / 10;
                int patch= version % 10;
            }
        }
    }