Transmits the readings from the voltage and current sensors

                r2Type                    : It is the value of reading 2: 0 - Current, 1 - Foreward Sonar, 2 - Back Sonar, 3 - RPM (uint8_t)
                voltage                   : Voltage in uS of PWM. 0 uS = 0V, 20 uS = 21.5V (uint16_t)
                reading2                  : Depends on the value of r2Type (0) Current consumption in uS of PWM, 20 uS = 90Amp (1) Distance in cm (2) Distance in cm (3) Absolute value (uint16_t)

def volt_sensor_send(self, r2Type, voltage, reading2, force_mavlink1=False):
                '''
                Transmits the readings from the voltage and current sensors

                r2Type                    : It is the value of reading 2: 0 - Current, 1 - Foreward Sonar, 2 - Back Sonar, 3 - RPM (uint8_t)
                voltage                   : Voltage in uS of PWM. 0 uS = 0V, 20 uS = 21.5V (uint16_t)
                reading2                  : Depends on the value of r2Type (0) Current consumption in uS of PWM, 20 uS = 90Amp (1) Distance in cm (2) Distance in cm (3) Absolute value (uint16_t)

                '''
                return self.send(self.volt_sensor_encode(r2Type, voltage, reading2), force_mavlink1=force_mavlink1)