Tag Archives: Pi Pico

Many Raspberry Pi Pico W project in microPython require the logging of sensor data. With these log files, we need a convenient way to transfer the data from the Pi Pico to a desktop PC. In earlier lessons, we showed how to log data to the Pi Pico flash memory. In today’s lesson we show how to transfer those log files to your PC. This is the code we developed in the video lesson.

import serial
import time
serialPort= 'COM7'
baudRate = 115200
ser = serial.Serial(serialPort,baudRate, timeout=5)
time.sleep(1)
ser.write(b"f=open('log.txt','r')\r\n")
line =ser.readline().decode('utf-8').strip()
print(line)
time.sleep(.1)
with open('log.txt','w') as file:
    while line !="''":
        ser.write(b"f.readline()\r\n")
        line =ser.readline().decode('utf-8').strip()
        print("LINE: ",line)
        line =ser.readline().decode('utf-8').strip()
        print("LINE: ",line)
        if line.startswith("'") and line !="''":
            line = line[1:-3]
            file.write(line+'\n')
ser.write(b"f.close()\r\n")
ser.close()

import serial

import time

serialPort= 'COM7'

baudRate = 115200

ser = serial.Serial(serialPort,baudRate, timeout=5)

time.sleep(1)

ser.write(b"f=open('log.txt','r')\r\n")

line =ser.readline().decode('utf-8').strip()

print(line)

time.sleep(.1)

with open('log.txt','w') as file:

while line !="''":

ser.write(b"f.readline()\r\n")

line =ser.readline().decode('utf-8').strip()

print("LINE: ",line)

line =ser.readline().decode('utf-8').strip()

print("LINE: ",line)

if line.startswith("'") and line !="''":

line = line[1:-3]

file.write(line+'\n')

ser.write(b"f.close()\r\n")

ser.close()

Python, Raspberry Pi Pico

Sending Data Over WiFi Between Raspberry Pi Pico W and Your PC

February 18, 2025 admin

In this video lesson we show how we can send and receive data between the Raspberry Pi Pico W, and your PC. We will be running python on the PC, and we will exchange data using the UDP protocol. UDP is simple, and a very reliable way to send data packets back and forth. In this example, we will be demonstrating a simple Client Server relationship between the Pi Pico and PC using UDP over WiFi.

For your convenience, this is the “Server” software you will run on the Pi Pico.

import network
import usocket as socket
import secrets
import time

wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.connect(secrets.SSID,secrets.PASSWORD)

# Wait for connection
while not wlan.isconnected():
    time.sleep(1)
print("Connection Completed")
print('WiFi connected')
print(wlan.ifconfig())

# Set up UDP server
server_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
server_socket.bind((wlan.ifconfig()[0], 12345))
print("Server is Up and Listening")
print(wlan.ifconfig()[0])

while True:
    print('Waiting for a request from the client...')
    # Receive request from client
    request, client_address = server_socket.recvfrom(1024)
    print("Client Request:",request.decode())
    print("FROM CLIENT",client_address)
    
    # String to send
    data = "225,128,64"
    
    # Send data to client
    server_socket.sendto(data.encode(), client_address)
    print(f'Sent data to {client_address}')
    
    # Optional: Pause for a short period to prevent overwhelming the client
    time.sleep(1)

import network

import usocket as socket

import secrets

import time

wlan = network.WLAN(network.STA_IF)

wlan.active(True)

wlan.connect(secrets.SSID,secrets.PASSWORD)

# Wait for connection

while not wlan.isconnected():

time.sleep(1)

print("Connection Completed")

print('WiFi connected')

print(wlan.ifconfig())

# Set up UDP server

server_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

server_socket.bind((wlan.ifconfig()[0], 12345))

print("Server is Up and Listening")

print(wlan.ifconfig()[0])

while True:

print('Waiting for a request from the client...')

# Receive request from client

request, client_address = server_socket.recvfrom(1024)

print("Client Request:",request.decode())

print("FROM CLIENT",client_address)

# String to send

data = "225,128,64"

# Send data to client

server_socket.sendto(data.encode(), client_address)

print(f'Sent data to {client_address}')

# Optional: Pause for a short period to prevent overwhelming the client

time.sleep(1)

Notice that the above code wants to load a “secrets” file that contain your WiFi name, and password

You should edit the code below with your WiFi username and your password, and then save the file in the Pi Pico lib folder, with the name secrets.py (don’t forget the .py)

SSID="YOUR WIFI NAME"
PASSWORD="YOUR WIFI PASSWORD"

1 2	SSID="YOUR WIFI NAME" PASSWORD="YOUR WIFI PASSWORD"

Now, on the PC side, you will run your client, which will be run in Python. Here is the client software:

import socket
import time

# Set up UDP client
client_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
server_address = ('192.168.88.71', 12345)  # Adjust IP address and port as needed

while True:
    # Send request to the server
    request_message = "SEND DATA"
    client_socket.sendto(request_message.encode(), server_address)
    
    # Receive data from the server
    data, addr = client_socket.recvfrom(1024)
    print('Received data:', data.decode())
    
    # Send acknowledgment back to server
    #ack_message = "Data received successfully"
    #client_socket.sendto(ack_message.encode(), addr)
    
    # Wait for 10 seconds before next request
    time.sleep(10)

import socket

import time

# Set up UDP client

client_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

server_address = ('192.168.88.71', 12345) # Adjust IP address and port as needed

while True:

# Send request to the server

request_message = "SEND DATA"

client_socket.sendto(request_message.encode(), server_address)

# Receive data from the server

data, addr = client_socket.recvfrom(1024)

print('Received data:', data.decode())

# Send acknowledgment back to server

#ack_message = "Data received successfully"

#client_socket.sendto(ack_message.encode(), addr)

# Wait for 10 seconds before next request

time.sleep(10)

Raspberry Pi Pico

Measure Distance Using the HC-SR04 Ultrasonic Sensor on the Raspberry Pi Pico

January 28, 2025 admin

In this Video Lesson I will teach you how to use echolocation to measure distances. We will use the HC-SR04 Ultrasonic Sensor, and will use the Raspberry Pi Pico W. We will explain how echolocation works, and show you how the sensor works. We will do the math, and then create the code for making measurements.

import machine
import time

TRIG_PIN = 16
ECHO_PIN = 17

TRIG = machine.Pin(TRIG_PIN,machine.Pin.OUT)
ECHO = machine.Pin(ECHO_PIN,machine.Pin.IN)

def distance():
    TRIG.low()
    time.sleep_us(2)
    TRIG.high()
    time.sleep_us(10)
    TRIG.low()
    while (ECHO.value()==0):
        pass
    time1=time.ticks_us()
    while (ECHO.value()==1):
        pass
    time2=time.ticks_us()
    pingTime=time.ticks_diff(time2,time1)/2
    d=.0343*pingTime
    return d
while True:
    dist=distance()
    print("Distance to Target: ",dist," cm")
    time.sleep_ms(250)

import machine

import time

TRIG_PIN = 16

ECHO_PIN = 17

TRIG = machine.Pin(TRIG_PIN,machine.Pin.OUT)

ECHO = machine.Pin(ECHO_PIN,machine.Pin.IN)

def distance():

TRIG.low()

time.sleep_us(2)

TRIG.high()

time.sleep_us(10)

TRIG.low()

while (ECHO.value()==0):

pass

time1=time.ticks_us()

while (ECHO.value()==1):

pass

time2=time.ticks_us()

pingTime=time.ticks_diff(time2,time1)/2

d=.0343*pingTime

return d

while True:

dist=distance()

print("Distance to Target: ",dist," cm")

time.sleep_ms(250)

Technology Tutorials

Tag Archives: Pi Pico

Transfer Data Log Files from the Raspberry Pi Pico W to Your Desktop PC

Sending Data Over WiFi Between Raspberry Pi Pico W and Your PC

Measure Distance Using the HC-SR04 Ultrasonic Sensor on the Raspberry Pi Pico

Making The World a Better Place One High Tech Project at a Time. Enjoy!