Send a debug value. The index is used to discriminate between values.
                These values show up in the plot of QGroundControl as
                DEBUG N.

                time_boot_ms              : Timestamp (milliseconds since system boot) (uint32_t)
                ind                       : index of debug variable (uint8_t)
                value                     : DEBUG value (float)

def debug_send(self, time_boot_ms, ind, value, force_mavlink1=False):
                '''
                Send a debug value. The index is used to discriminate between values.
                These values show up in the plot of QGroundControl as
                DEBUG N.

                time_boot_ms              : Timestamp (milliseconds since system boot) (uint32_t)
                ind                       : index of debug variable (uint8_t)
                value                     : DEBUG value (float)

                '''
                return self.send(self.debug_encode(time_boot_ms, ind, value), force_mavlink1=force_mavlink1)