#if defined(LED_RING)

#define LED_RING_ADDRESS 0xDA   //8 bits  -- my initial :)

void i2CLedRingState()
{
    uint8_t b[10];
    static uint8_t state;

    if (state == 0) {
        b[0] = 'z';
        b[1] = (180 - heading) / 2;     // 1 unit = 2 degrees;
        i2c_rep_start(LED_RING_ADDRESS);
        for (uint8_t i = 0; i < 2; i++)
            i2c_write(b[i]);
        i2c_stop();
        state = 1;
    } else if (state == 1) {
        b[0] = 'y';
        b[1] = constrain(angle[ROLL] / 10 + 90, 0, 180);
        b[2] = constrain(angle[PITCH] / 10 + 90, 0, 180);
        i2c_rep_start(LED_RING_ADDRESS);
        for (uint8_t i = 0; i < 3; i++)
            i2c_write(b[i]);
        i2c_stop();
        state = 2;
    } else if (state == 2) {
        b[0] = 'd';             // all unicolor GREEN 
        b[1] = 1;
        if (armed)
            b[2] = 1;
        else
            b[2] = 0;
        i2c_rep_start(LED_RING_ADDRESS);
        for (uint8_t i = 0; i < 3; i++)
            i2c_write(b[i]);
        i2c_stop();
        state = 0;
    }
}

void blinkLedRing()
{
    uint8_t b[3];
    b[0] = 'k';
    b[1] = 10;
    b[2] = 10;
    i2c_rep_start(LED_RING_ADDRESS);
    for (uint8_t i = 0; i < 3; i++)
        i2c_write(b[i]);
    i2c_stop();
}

#endif