cmpt_401_portfolio

Lab Assignment 3

Oct. 4, 2023

Project 1
Project 2

Assignment project 1:

Description:

Create a system, where pressing one button plays “Row, row, row your boat” and another button plays “Mary had a little lamb” by sending out the correct frequencies on a buzzer.

List of hardware components:

Component	Amount
ESP32-S3-WROOM	1
GPIO Extension Board	1
Project Board	1
Passive Buzzer	1
NPN Transistor	1
Wire M-M	8
Big Push Button	2
Resistor - 1K Ω	1
Resistor - 10K Ω	4

Circuit diagram:

Photo of breadboard:

Breadboard view:

Source code:

from machine import Pin, PWM
import time

button_a=Pin(21,Pin.IN,Pin.PULL_UP)
button_b=Pin(47,Pin.IN,Pin.PULL_UP)
passiveBuzzer=PWM(Pin(3),2000)

interval = 450          # set metronome interval

passiveBuzzer.deinit()

def C(oct):             # freq for C
    if oct == 0:
        return 16
    if oct == 1:
        return 33
    if oct == 2:
        return 65
    if oct == 3:
        return 131
    if oct == 4:
        return 262
    if oct == 5:
        return 523
    if oct == 6:
        return 1047
    if oct == 7:
        return 2093
    if oct == 8:
        return 4186
def D(oct):             # freq for D
    if oct == 3:
        return 147
    if oct == 4:
        return 294
def E(oct):             # freq for E
    if oct == 3:
        return 165
    if oct == 4:
        return 330
def F(oct):             # freq for F
    if oct == 3:
        return 175
    if oct == 4:
        return 349
def G(oct):             # freq for G
    if oct == 3:
        return 196
    if oct == 4:
        return 392
def A(oct):             # freq for A
    if oct == 3:
        return 220
    if oct == 4:
        return 440
def B(oct):             # freq for B
    if oct == 3:
        return 247
    if oct == 4:
        return 494

def hold(n,t):             # play frequency for given length
    passiveBuzzer.init()
    passiveBuzzer.freq(n)
    time.sleep_ms(int(t*interval)-20)
    passiveBuzzer.deinit()
    time.sleep_ms(20)

def rowBoat():             # "Row, Row, Row your Boat" - song
    hold(C(4),1)
    hold(C(4),1)
    hold(C(4),0.75)
    hold(D(4),0.25)
    hold(E(4),1)
    
    hold(E(4),0.75)
    hold(D(4),0.25)
    hold(E(4),0.75)
    hold(F(4),0.25)
    hold(G(4),2)
    
    hold(C(5),0.33)
    hold(C(5),0.33)
    hold(C(5),0.33)
    hold(G(4),0.33)
    hold(G(4),0.33)
    hold(G(4),0.33)
    hold(E(4),0.33)
    hold(E(4),0.33)
    hold(E(4),0.33)
    hold(C(4),0.33)
    hold(C(4),0.33)
    hold(C(4),0.33)
    
    hold(G(4),0.75)
    hold(F(4),0.25)
    hold(E(4),0.75)
    hold(D(4),0.25)
    hold(C(4),2)

def littleLamb():          # Mary had a little Lamb" - song
    hold(E(4),1)
    hold(D(4),1)
    hold(C(4),1)
    hold(D(4),1)
    hold(E(4),1)
    hold(E(4),1)
    hold(E(4),2)
    
    hold(D(4),1)
    hold(D(4),1)
    hold(D(4),2)
    hold(E(4),1)
    hold(G(4),1)
    hold(G(4),2)
    
    hold(E(4),1)
    hold(D(4),1)
    hold(C(4),1)
    hold(D(4),1)
    hold(E(4),1)
    hold(E(4),1)
    hold(E(4),1)
    
    hold(E(4),1)
    hold(D(4),1)
    hold(D(4),1)
    hold(E(4),1)
    hold(D(4),1)
    hold(C(4),2)

try:
    while True:          # listen for respective button pressing
        if not button_a.value():
            rowBoat()
        if not button_b.value():
            littleLamb()
except:
    passiveBuzzer.deinit()

Video:

Assignment project 2:

Description:

Create a system that communicates via UART to another system to activate their buzzer and LED and also to receive input from that system to activiate the local buzzer and LED. This should be done by pressing buttons on each respective board. In this case I worked with Jonah, who’s lab 3.2 project is visible here.

List of hardware components:

Component	Amount
ESP32-S3-WROOM	1
GPIO Extension Board	1
Project Board	1
Green LED	1
NPN Transistor	1
Active Buzzer	1
Push Button	1
Wire M-M	10
Resistor - 220 Ω	1
Resistor - 1K Ω	1
Resistor - 10k Ω	2
Jonah’s Project	1

Circuit diagram:

Photo of breadboard:

Breadboard view:

Source code:

from machine import Pin, PWM, UART
import math
import time

PI = 3.14

led = Pin(1, Pin.OUT)
button = Pin(21, Pin.IN,Pin.PULL_UP)
passiveBuzzer=PWM(Pin(3),2000)

passiveBuzzer.deinit()

usart_flag=0
        
                                     # Initialize UART class
myUsart = UART(1, baudrate=115200, bits=8, parity=0, rx=5, tx=2, timeout=10) 

def alert():                         # buzzer sound control
    for x in range(0,136):
        sinVal=math.sin(x*10*PI/180)
        toneVal=2000+int(sinVal*500)
        passiveBuzzer.freq(toneVal)
        time.sleep_ms(10)

while True:
    if myUsart.any():                # if we receive signal through the rx
        usart_buffer=myUsart.read()
        passiveBuzzer.init()
        led.value(1)                 # then light up LED
        alert()                      # and play sound on buzzer
        usart_flag=1
    if usart_flag==1:                # stop process after initiating it once
        passiveBuzzer.deinit()
        led.value(0)
        usart_flag=0
    if not button.value():           # if button pressed, send signal over the tx
        myUsart.write("1\r\n")
        time.sleep_ms(200)

See Jonah’s Source Code for receiving/sending counterpart (in lab 3).