#Coding4Fun – How to control your #drone with 20 lines of code! (6/N)

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Today is code time also! And a continuation from my previous sample.

Yesterday I show how to read a static value: the battery. And, when you work with a device like a drone there are other important values to analyze in order to send commands to the drone. Like altitude, position, time of flight etc.

So, based on yesterday sample, I’ll show how to create a simple Python app, that will display the accelerator X value. In the following video you can see the how the value start “static” during the 1st couple of seconds, until I pickup the device and I moved it around.

Important: don’t blame me about the low battery. Playing with the drone drains the battery very fast!

# Bruno Capuano
# get drone acceleration demo
import socket
import time
import threading
def receiveData():
global response
while True:
response, _ = clientSocket.recvfrom(1024)
def readStates():
global battery
global acceleration_x
while True:
response_state, _ = stateSocket.recvfrom(256)
if response_state != 'ok':
response_state = response_state.decode('ASCII')
list = response_state.replace(';', ':').split(':')
battery = int(list[21])
acceleration_x = float(list[27])
print(f'Battery: {battery} % – accelX: {acceleration_x} ')
def sendCommand(command):
global response
timestamp = int(time.time() * 1000)
clientSocket.sendto(command.encode('utf-8'), address)
while response is None:
if (time.time() * 1000) timestamp > 5 * 1000:
return False
return response
def sendReadCommand(command):
response = sendCommand(command)
response = str(response)
return response
def sendControlCommand(command):
response = None
for i in range(0, 5):
response = sendCommand(command)
if response == 'OK' or response == 'ok':
return True
return False
# ———————————————–
# Main program
# ———————————————–
# connection info
UDP_IP = ''
UDP_PORT = 8889
last_received_command = time.time()
address = (UDP_IP, UDP_PORT)
response = None
response_state = None
clientSocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
clientSocket.bind(('', UDP_PORT))
stateSocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
stateSocket.bind(('', STATE_UDP_PORT))
# start threads
recThread = threading.Thread(target=receiveData)
recThread.daemon = True
stateThread = threading.Thread(target=readStates)
stateThread.daemon = True
# connect to drone
# drone information
battery = 0
acceleration_x = 0
for i in range(0, 10):
# get battery and extra drone information

Once again, the code is very straight forward. It runs a loop furing 10 seconds, showing the battery and accelX information.

Just as a reminder, this is the information we get from the drone:


As you can read, all the information is condensed in a single line and we can split and get:

  • pitch
  • roll
  • yaw
  • vgx
  • vgv
  • vgz
  • templ (temperature low)
  • temph (temperature high)
  • tof (time of flight)
  • h (height)
  • b (battery)
  • baro (barometer)
  • time
  • agx
  • agy
  • agz

Happy coding!


El Bruno

More posts in my blog ElBruno.com.

More info in https://beacons.ai/elbruno



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