In this lesson I show how to practically implement an Infrared IR sensor into a Raspberry Pi Pico project. For your convenience, the code developed in the video is included below.

import time
from machine import Pin, freq
from ir_rx.print_error import print_error
from ir_rx.nec import NEC_8
IRdict ={69 : 'POWER', 70: 'MODE',71 : 'OFF',
         68: 'PLAY', 64 : 'BACK', 67 : 'FORWARD', 7: 'ENTER', 21: '-',
         9 : '+', 22 : 0,25 : 'LOOP', 13:'USD' ,
         12: 1, 24 : 2,94 : 3,
        8 :4, 28 : 5, 90 : 6,
        66 : 7, 82 : 8, 74 : 9}
newCommand=[]
beginRecord=False
cmdReady=False
angleString=''
newBit=""
irPin=17
myIR = Pin(irPin, Pin.IN)
def callback(IRbit, addr, ctrl):
    global newCommand
    global beginRecord
    global cmdReady
    global IRdict
    if IRbit==69:
        beginRecord=True
        newCommand=[]
        cmdReady=False
    if beginRecord==True and IRbit!=-1:
        newCommand.append(IRdict[IRbit])
    if IRbit==7:
        cmdReady=True

IR = NEC_8(myIR, callback)  # Instantiate receiver

try:
    while True:
        if cmdReady==True:
            print(newCommand)
            cmdReady=False
except KeyboardInterrupt:
    IR.close()
    print("Program Terminated")

import time

from machine import Pin, freq

from ir_rx.print_error import print_error

from ir_rx.nec import NEC_8

IRdict ={69 : 'POWER', 70: 'MODE',71 : 'OFF',

68: 'PLAY', 64 : 'BACK', 67 : 'FORWARD', 7: 'ENTER', 21: '-',

9 : '+', 22 : 0,25 : 'LOOP', 13:'USD' ,

12: 1, 24 : 2,94 : 3,

8 :4, 28 : 5, 90 : 6,

66 : 7, 82 : 8, 74 : 9}

newCommand=[]

beginRecord=False

cmdReady=False

angleString=''

newBit=""

irPin=17

myIR = Pin(irPin, Pin.IN)

def callback(IRbit, addr, ctrl):

global newCommand

global beginRecord

global cmdReady

global IRdict

if IRbit==69:

beginRecord=True

newCommand=[]

cmdReady=False

if beginRecord==True and IRbit!=-1:

newCommand.append(IRdict[IRbit])

if IRbit==7:

cmdReady=True

IR = NEC_8(myIR, callback) # Instantiate receiver

try:

while True:

if cmdReady==True:

print(newCommand)

cmdReady=False

except KeyboardInterrupt:

IR.close()

print("Program Terminated")

Uncategorized

Cleanly Exiting Dual Core Program in MicroPython

May 21, 2024 admin

In this lesson we demonstrate using both cores on the Raspberry Pi Pico W. The program controls a servo from a push button. The servo is controlled on the second core by a thread, and the push button is monitored in the main program.

from machine import Pin
import time
import _thread
import SERVO

servoToggle=False
running = True
servoPin=17
myServo=SERVO.servo(servoPin)

redButPin=16
myRedButton=Pin(redButPin,Pin.IN,Pin.PULL_UP)
redButStateNow=1
redButStateOld=1

def othCore():
    global servoToggle
    global running
    servoState=0
    while running:
        if servoState==0 and servoToggle==True:
            for i in range(0,180,1):
                myServo.pos(i)
                time.sleep(.05)
            servoToggle=False
            servoState=180
        if servoState==180 and servoToggle==True:
            for i in range(180,0,-1):
                myServo.pos(i)
                time.sleep(.05)
            servoToggle=False
            servoState=0
    print("othCore Terminated")
    
_thread.start_new_thread(othCore,())
time.sleep(.25)
                

try:
    while True:
        redButStateNow=myRedButton.value()
        if redButStateNow==0 and redButStateOld==1:
            print("Toggle")
            servoToggle =True
        redButStateOld=redButStateNow
        time.sleep(.1)
except KeyboardInterrupt:
    print('Keyboard Interrupt')
    running=False
    time.sleep(.1)
    print("Program is Done")

from machine import Pin

import time

import _thread

import SERVO

servoToggle=False

running = True

servoPin=17

myServo=SERVO.servo(servoPin)

redButPin=16

myRedButton=Pin(redButPin,Pin.IN,Pin.PULL_UP)

redButStateNow=1

redButStateOld=1

def othCore():

global servoToggle

global running

servoState=0

while running:

if servoState==0 and servoToggle==True:

for i in range(0,180,1):

myServo.pos(i)

time.sleep(.05)

servoToggle=False

servoState=180

if servoState==180 and servoToggle==True:

for i in range(180,0,-1):

myServo.pos(i)

time.sleep(.05)

servoToggle=False

servoState=0

print("othCore Terminated")

_thread.start_new_thread(othCore,())

time.sleep(.25)

try:

while True:

redButStateNow=myRedButton.value()

if redButStateNow==0 and redButStateOld==1:

print("Toggle")

servoToggle =True

redButStateOld=redButStateNow

time.sleep(.1)

except KeyboardInterrupt:

print('Keyboard Interrupt')

running=False

time.sleep(.1)

print("Program is Done")

MicroPython, Raspberry Pi Pico

MicroPython MultiCore Programming on the Raspberry Pi Pico Using Threading

May 7, 2024 admin

In this video I show how to use both cores on the Raspberry Pi Pico W. We will explore an example using threading where we will operate 2 LED and a servo.

from machine import Pin
import time
import _thread
import SERVO

greenPin=14
redPin=15
servoPin=17

LED=""

redLED=Pin(redPin,Pin.OUT)
greenLED=Pin(greenPin,Pin.OUT)

delOn=.1
delOff=.1
myServo=SERVO.servo(servoPin)
running =True

def othCore(del1,del2):
    global LED
    while True:
        if LED=="RED":
            redLED.value(1)
            time.sleep(del1)
            redLED.value(0)
            time.sleep(del2)
        if LED=="GREEN":
            greenLED.value(1)
            time.sleep(del1)
            greenLED.value(0)
            time.sleep(del2)
_thread.start_new_thread(othCore,(delOn,delOff))
time.sleep(.25)
while True:
    LED="RED"
    for i in range(0,180,1):
        myServo.pos(i)
        time.sleep(.01)
    LED="GREEN"
    for i in range(180,0,-1):
        myServo.pos(i)
        time.sleep(.01)

from machine import Pin

import time

import _thread

import SERVO

greenPin=14

redPin=15

servoPin=17

LED=""

redLED=Pin(redPin,Pin.OUT)

greenLED=Pin(greenPin,Pin.OUT)

delOn=.1

delOff=.1

myServo=SERVO.servo(servoPin)

running =True

def othCore(del1,del2):

global LED

while True:

if LED=="RED":

redLED.value(1)

time.sleep(del1)

redLED.value(0)

time.sleep(del2)

if LED=="GREEN":

greenLED.value(1)

time.sleep(del1)

greenLED.value(0)

time.sleep(del2)

_thread.start_new_thread(othCore,(delOn,delOff))

time.sleep(.25)

while True:

LED="RED"

for i in range(0,180,1):

myServo.pos(i)

time.sleep(.01)

LED="GREEN"

for i in range(180,0,-1):

myServo.pos(i)

time.sleep(.01)

MicroPython, Raspberry Pi Pico

Servo Library for the Raspberry Pi Pico W in MicroPython

April 23, 2024 admin

In this lesson we demonstrate how to create a custom library on the Raspberry Pi Pico W to control a servo. We create a servo class, and then show how to use it as a library in future programs.

class servo:
    def __init__(self,sPin):
        import machine
        self.servoPin=sPin
        self.obj=machine.PWM(machine.Pin(self.servoPin))
        self.obj.freq(50)
    
    def pos(self,angle):
        writeVal=6553/180*angle+1638
        self.obj.duty_u16(int(writeVal))

class servo:

def __init__(self,sPin):

import machine

self.servoPin=sPin

self.obj=machine.PWM(machine.Pin(self.servoPin))

self.obj.freq(50)

def pos(self,angle):

writeVal=6553/180*angle+1638

self.obj.duty_u16(int(writeVal))

MicroPython, Raspberry Pi Pico

How to Write Modular Code With Micropython Functions

March 19, 2024 admin

In this lesson we show how to write modular code in micropython. We demonstrate this with a simple example of how to calculate parameters of interest for a given rectangle. For your convenience, the code developed in the video is presented below. Enjoy!

def rectSolve(len,wid):
    #global area,perimeter,diagonal
    area=rectArea(len,wid)
    perimeter=rectPerimeter(len,wid)
    diagonal=rectDiagonal(len,wid)
    return area,perimeter,diagonal

def rectArea(len,wid):
    area=len*wid
    return area

def rectPerimeter(len,wid):
    perimeter=2*len+2*wid
    return perimeter

def rectDiagonal(len,wid):
    diag=(len**2+wid**2)**(1/2)
    return diag
   
while True:
    l=float(input("What is Length of your Rectangle? "))
    w=float(input("what is the Width of your Rectuangle? "))
    a,p,d = rectSolve(l,w)
    print("Your Rectangle Information: ")
    print("Area: ",a)
    print("Perimeter: ",p)
    print("Diagonal: ",d)
    print()

def rectSolve(len,wid):

#global area,perimeter,diagonal

area=rectArea(len,wid)

perimeter=rectPerimeter(len,wid)

diagonal=rectDiagonal(len,wid)

return area,perimeter,diagonal

def rectArea(len,wid):

area=len*wid

return area

def rectPerimeter(len,wid):

perimeter=2*len+2*wid

return perimeter

def rectDiagonal(len,wid):

diag=(len**2+wid**2)**(1/2)

return diag

while True:

l=float(input("What is Length of your Rectangle? "))

w=float(input("what is the Width of your Rectuangle? "))

a,p,d = rectSolve(l,w)

print("Your Rectangle Information: ")

print("Area: ",a)

print("Perimeter: ",p)

print("Diagonal: ",d)

print()

Technology Tutorials

Using an Infrared IR Remote Control in a Raspberry Pi Pico W Project

Cleanly Exiting Dual Core Program in MicroPython

MicroPython MultiCore Programming on the Raspberry Pi Pico Using Threading

Servo Library for the Raspberry Pi Pico W in MicroPython

How to Write Modular Code With Micropython Functions

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