# Ack a previously sent ulog_stream message that had# the NEED_ACK flag setuint64 timestamp # time since system start (microseconds)int32 ACK_TIMEOUT =50 # timeout waiting for an ack until we retry to send the message [ms]int32 ACK_MAX_TRIES =50 # maximum amount of tries to (re-)send a message, each time waiting ACK_TIMEOUT msuint16 msg_sequence