I've written a Python3 script which runs on Raspberry Pi Zero W that collects data from an IMU sensor (MPU9250) and creates 3 different angle values; roll, pitch, yaw. Which looks like this:
def main():
while True:
dataAcc = mpu.readAccelerometerMaster()
dataGyro = mpu.readGyroscopeMaster()
dataMag = mpu.readMagnetometerMaster()
[ax, ay, az] = [round(dataAcc[0], 5), round(dataAcc[1], 5), round(dataAcc[2], 5)]
[gx, gy, gz] = [round(dataGyro[0], 5), round(dataGyro[1], 5), round(dataGyro[2], 5)]
[mx, my, mz] = [round(dataMag[0], 5), round(dataMag[1], 5), round(dataMag[2], 5)]
update(gx, gy, gz, ax, ay, az, mx, my, mz)
roll = getRoll()
pitch = getPitch()
yaw = getYaw()
print(f"Roll: {round(roll, 2)}\tPitch: {round(pitch, 2)}\tYaw: {round(yaw, 2)}")
The thing I want to do is send these 3 values to my PC and read them. Is there any way to send this data.
(If possible except serial
).
There are many ways of doing this, to name a few:
Here's a possible implementation of the first suggestion above with UDP. First, the Raspi end generates 3 readings X, Y and Z and sends them to the PC every second via UDP:
#!/usr/bin/env python3
import socket
import sys
from time import sleep
import random
from struct import pack
# Create a UDP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
host, port = '192.168.0.8', 65000
server_address = (host, port)
# Generate some random start values
x, y, z = random.random(), random.random(), random.random()
# Send a few messages
for i in range(10):
# Pack three 32-bit floats into message and send
message = pack('3f', x, y, z)
sock.sendto(message, server_address)
sleep(1)
x += 1
y += 1
z += 1
Here's the matching code for the PC end of it:
#!/usr/bin/env python3
import socket
import sys
from struct import unpack
# Create a UDP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
# Bind the socket to the port
host, port = '0.0.0.0', 65000
server_address = (host, port)
print(f'Starting UDP server on {host} port {port}')
sock.bind(server_address)
while True:
# Wait for message
message, address = sock.recvfrom(4096)
print(f'Received {len(message)} bytes:')
x, y, z = unpack('3f', message)
print(f'X: {x}, Y: {y}, Z: {z}')
Here's a possible implementation of the MQTT suggestion. First, the Publisher which is publishing the three values. Note that I have the mosquitto
broker running on my desktop:
#!/usr/bin/env python3
from time import sleep
import random
import paho.mqtt.client as mqtt
broker = '192.168.0.8'
client = mqtt.Client()
client.connect(broker,1883,60)
# Generate some random start values
x, y, z = random.random(), random.random(), random.random()
# Send a few messages
for i in range(10):
# Publish out three values
client.publish("topic/XYZ", f'{x},{y},{z}');
sleep(1)
x += 1
y += 1
z += 1
And here is the subscriber, which listens for the messages and prints them:
#!/usr/bin/env python3
import socket
import sys
import paho.mqtt.client as mqtt
def on_connect(client, userdata, flags, rc):
print("Connected with result code "+str(rc))
client.subscribe("topic/XYZ")
def on_message(client, userdata, msg):
message = msg.payload.decode()
print(f'Message received: {message}')
broker = '192.168.0.8'
client = mqtt.Client()
client.connect(broker,1883,60)
client.on_connect = on_connect
client.on_message = on_message
client.loop_forever()
There's an example of Bluetooth communication here.
There is a similar answer with more examples here.