uint8_t temperature[2];
int8_t digit;
uint16_t decimal;
char str_temp[10];

if (read)
{
    read = 0;
    ow_reset();
    ow_write_byte(0xCC);    // skip ROM
    ow_write_byte(0xBE);    // read scratchpad

    temperature[0] = ow_read_byte();
    temperature[1] = ow_read_byte();
    ow_reset();

    digit = temperature[0] >> 4;
    digit |= (temperature[1] & 0x7) << 4;
    decimal = temperature[0] & 0xf;
    decimal *= 625;
}
if (transmit)
{
    transmit = 0;
    cmd = 0;

    sprintf(str_temp, "%+d.%04u", digit, decimal);
    uart_print(str_temp);
    uart_nwln();
}