hi I faced this critical error ((pre prearm ahrs ek3 sources require optical follow))
when when i run this code
from dronekit import connect, VehicleMode, LocationGlobalRelative
from pymavlink import mavutil
import time
import argparse
parser = argparse.ArgumentParser()
parser.add_argument(‘–connect’, default=‘127.0.0.1:14550’)
args = parser.parse_args()
Connect to the Vehicle
print (‘Connecting to vehicle on: %s’ % args.connect)
vehicle = connect(args.connect, baud=921600, wait_ready=True)
#921600 is the baudrate that you have set in the mission plannar or qgc
Function to arm and then takeoff to a user specified altitude
def arm_and_takeoff(aTargetAltitude):
print (“Arming motors”)
Copter should arm in GUIDED mode
vehicle.mode = VehicleMode(“GUIDED”)
vehicle.armed = True
while not vehicle.armed:
print (" Waiting for arming…")
time.sleep(1)
print (“Taking off!”)
vehicle.simple_takeoff(aTargetAltitude) # Take off to target altitude
Check that vehicle has reached takeoff altitude
while True:
print (" Altitude: ", vehicle.location.global_relative_frame.alt)
#Break and return from function just below target altitude.
if vehicle.location.global_relative_frame.alt>=aTargetAltitude*0.95:
print (“Reached target altitude”)
break
time.sleep(1)
Initialize the takeoff sequence to 15m
arm_and_takeoff(15)
print (“Take off complete”)
Hover for 10 seconds
time.sleep(15)
print (“Now let’s land”)
vehicle.mode = VehicleMode(“LAND”)
my questions are :
what is this error mean ?
how can i fix it please ?
i just want run it indoor place