uint64 timestamp # [us] Time since system start
uint8 firmware # [-] ESC firmware type (see ESC_FIRMWARE enum in MAVLink)
uint8 index # [-]Index of the ESC (0 = ESC1, 1 = ESC2, etc, 255 = All)
uint16 length # [-]Length of valid data
uint8[64] data # [-]Raw ESC EEPROM data
uint32[2] write_mask # [-] Bitmask indicating which bytes in the data array should be written (max 64 values)

uint8 ORB_QUEUE_LENGTH = 8 # To support 8 queued up requests