logging-onboard.py

"""
    If you have a companion computer connected to your autopilot,
    and it has read only file system, you can use autopilot's
    onboard logging system to log data from your companion computer.

    Also with this method, you can synchronize your log data
    and autopilot's log data with each other using GPS time.

    This script will send a message to autopilot and autopilot
    will start logging data.

    STATUSTEXT messages are saved in the log file as MSG.
    To see the log file, you can use mavlogdump.py script.
    Usage: mavlogdump.py FILENAME.bin --types=MSG
    You can dump the results to a file.
    mavlogdump.py FILENAME.bin --types=MSG > FILENAME.txt

    Currently, this method is only supported for STATUSTEXT messages.
    In the future, this method may be extended to support
    NAMED_VALUE_FLOAT (as DFLT) and NAMED_VALUE_INT (as D16, D32) messages.

    https://mavlink.io/en/messages/common.html#STATUSTEXT
"""

import time
import random
import pymavlink.mavutil as utility
import pymavlink.dialects.v20.all as dialect

# connect to vehicle
vehicle = utility.mavlink_connection(device="udpin:127.0.0.1:14560",
                                     source_system=1,
                                     source_component=1)

# wait for a heartbeat
vehicle.wait_heartbeat()

# inform user
print("Connected to system:", vehicle.target_system, ", component:", vehicle.target_component)

# create an infinite loop
while True:

    # create STATUSTEXT message
    text = f"CUSTOM:{random.randint(1,6)},{random.randint(0,1)},{random.random()}"
    message = dialect.MAVLink_statustext_message(severity=dialect.MAV_SEVERITY_DEBUG,
                                                 text=text.encode("utf-8"))
    print(text)

    # send the message to the vehicle
    vehicle.mav.send(message)

    # wait for 1 second
    time.sleep(1)

"""
# open the log file
with open("logdata.txt", "r") as file:

    # read all lines
    lines = file.readlines()

    # iterate over lines
    for line in lines:

        # check if the log is for our CUSTOM data
        if "CUSTOM" in line:

            # filter the custom data
            line = line.split("CUSTOM:")[1].split("}")[0].split(",")
            dice, coin, my_float = int(line[0]), int(line[1]), float(line[2])

            # debug the result
            print("Dice:", dice, "Coin:", coin, "Float:", my_float)
"""