CMPT401_TWU
Lab Report 3 - Buzzers, Serial Communication, and AD/DA Converters
30-09-2023
Jonah Watts
Table Of Contents:
Assignment Project #1
Task Description:
To Create a program that will play a song depending on which button you press. One button will play row row row your boat with a flashing LED, and the other will play Mary Had a little lamb with a static LED.
Hardware Components:
- 1x ESP32
- 1x ESP32 Breakout Board
- 1x Breadboard
- 1x Passive Buzzer
- 1x LED
- 1x 220 Ohm Resistor
- 2x Push Button
- 4x 10k Ohm Resistor
- 1x 1k Ohm Resistor
- 1x PNP Transistor
- 7x Jumper Wires
Circut Diagrams
Photo(s) of the breadboard:
Source Code
The Source code can be downloaded here here
#---------------------------------------------------------
# Jonah Watts
# Assignment 1, Project 2
# For CMPT 401
# Sources Used:
# - https://www.youtube.com/watch?v=QAbn-7Ai6UU&ab_channel=TechToTinker
# - https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.pinterest.com%2Fpin%2F470696598527464928%2F&psig=AOvVaw1y9Y3rIx5X1gOErwx_Ds50&ust=1696106994914000&source=images&cd=vfe&ved=0CBEQjRxqFwoTCNjgv4nZ0IEDFQAAAAAdAAAAABAE
# - https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.true-piano-lessons.com%2Fmary-had-a-little-lamb.html&psig=AOvVaw3zjJozSvAii070M3NDQ3hi&ust=1696125130794000&source=images&cd=vfe&ved=0CBEQjRxqFwoTCPCEltGc0YEDFQAAAAAdAAAAABAE
#-------------------------------------------------------
from machine import Pin,PWM
import math
import time
#Setup Pins
led1=Pin(5,Pin.OUT)
button1=Pin(4,Pin.IN,Pin.PULL_UP)
button2=Pin(0,Pin.IN,Pin.PULL_UP)
passiveBuzzer=PWM(Pin(13),2000)
#First create an array for the diffearnt notes in teh selected key
notes=[0,2093,2217,2349,2489,2637,2793,2959,3135,3322,3520,3729,3951,4186]
# Write the songs as arrays
rowRowRow = [
1,1,1,
1,1,1,
1,1,3,
5,5,5,
5,5,3,
5,5,6,
8,8,8,
8,8,6,
13,13,13,
8,8,8,
5,5,5,
1,1,1,
8,8,6,
5,5,3,
1,1,1
]
maryHadALittleLamb = [
5,3,1,3,5,5,5,
3,3,3,5,8,8,
5,3,1,3,5,5,5,
5,3,3,5,3,1
]
#Then create a function to play the notes, and keep led on while playing
def PlayMary():
led1.value(1)
for x in maryHadALittleLamb:
passiveBuzzer.init()
if x != 0:
passiveBuzzer.freq(notes[x])
time.sleep_ms(230)
passiveBuzzer.deinit()
led1.value(0)
def PlayRow():
tracker = 0
for x in rowRowRow:
#Blink led every 3 notes
if tracker%3 == 0:
led1.value(1)
else:
led1.value(0)
tracker += 1
#Play note
passiveBuzzer.init()
if x != 0:
passiveBuzzer.freq(notes[x])
time.sleep_ms(250)
passiveBuzzer.deinit()
led1.value(0)
#Play notes if button is pressed
try:
passiveBuzzer.deinit()
led1.value(0)
while True:
if not button1.value():
passiveBuzzer.init()
PlayMary()
passiveBuzzer.deinit()
elif not button2.value():
passiveBuzzer.init()
PlayRow()
passiveBuzzer.deinit()
except:
passiveBuzzer.deinit()
Video of program in action
Assignment Project #2:
Task Description:
The goal of this assignment is to create a program that will communicate with another ESP32. When the button is pressed on one ESP32, the other ESP32 will play a song and flash an LED. When the button is pressed on the other ESP32, the first ESP32 will play a different song and flash an LED but in a different way. This project was completed with Curtis Esau, with his project being found on his lab report site.
Hardware Components
- 1x ESP32
- 1x ESP32 Breakout Board
- 1x Breadboard
- 1x Passive Buzzer
- 1x LED
- 1x 220 Ohm Resistor
- 1x Push Button
- 2x 10k Ohm Resistor
- 1x 1k Ohm Resistor
- 1x PNP Transistor
- 7x Jumper Wires
Circut Diagrams
Photo(s) of the breadboard
Source Code
The Source code can be downloaded here here
#---------------------------------------------------------
# Jonah Watts
# Assignment 1, Project 2
# For CMPT 401
# Sources Used:
# - https://www.youtube.com/watch?v=QAbn-7Ai6UU&ab_channel=TechToTinker
# - https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.pinterest.com%2Fpin%2F470696598527464928%2F&psig=AOvVaw1y9Y3rIx5X1gOErwx_Ds50&ust=1696106994914000&source=images&cd=vfe&ved=0CBEQjRxqFwoTCNjgv4nZ0IEDFQAAAAAdAAAAABAE
# - https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.true-piano-lessons.com%2Fmary-had-a-little-lamb.html&psig=AOvVaw3zjJozSvAii070M3NDQ3hi&ust=1696125130794000&source=images&cd=vfe&ved=0CBEQjRxqFwoTCPCEltGc0YEDFQAAAAAdAAAAABAE
#-------------------------------------------------------
from machine import Pin,PWM,UART
import math
import time
usart_flag=0
myUsart = UART(1, baudrate=115200, bits=8, parity=0, rx=5, tx=2, timeout=10)
myUsart.write(str("\r\nESP32 initialization completed!\r\n")+\
str("Please input some characters,\r\n")+\
str("select \"Newline\" below and click send button. \r\n"))
#Setup Pins
led1=Pin(32,Pin.OUT)
button1=Pin(4,Pin.IN,Pin.PULL_UP)
button2=Pin(0,Pin.IN,Pin.PULL_UP)
passiveBuzzer=PWM(Pin(13),2000)
#First create an array for the diffearnt notes in teh selected key
notes=[0,2093,2217,2349,2489,2637,2793,2959,3135,3322,3520,3729,3951,4186]
maryHadALittleLamb = [
5,3,1,3,5,5,5,
3,3,3,5,8,8,
5,3,1,3,5,5,5,
5,3,3,5,3,1
]
#Then create a function to play the notes, and keep led on while playing
def PlayMary():
tracker = 0
led1.value(1)
for x in maryHadALittleLamb:
#Toggle the LED
if tracker%3 == 0:
led1.value(1)
else:
led1.value(0)
tracker+=1
#Play the note
passiveBuzzer.init()
if x != 0:
passiveBuzzer.freq(notes[x])
time.sleep_ms(230)
passiveBuzzer.deinit()
led1.value(0)
#Play notes if button is pressed
try:
passiveBuzzer.deinit()
led1.value(0)
while True:
#if i receive a message from the other esp32, activate flag and read buffer
if myUsart.any():
usart_buffer=myUsart.read()
usart_flag=1
#if flag is activated, play the song
if usart_flag==1:
usart_flag=0
passiveBuzzer.init()
PlayMary()
passiveBuzzer.deinit()
#if button is pressed, send a message to the other esp32
if not button1.value():
myUsart.write("ButtonPressed")
time.sleep_ms(200)
except:
passiveBuzzer.deinit()