#This is a system for medical syringe pump
print("By Afif for IOT BEB 34303:")
from ssd1306 import SSD1306_I2C
from machine import Pin, I2C, PWM
from time import sleep, ticks_ms, ticks_diff
#Declare pin connection
SERVO_PIN = 18
BUTTON_PINS = [5, 4, 14, 12]
I2C_SCL_PIN = 22
I2C_SDA_PIN = 21
RED_LED_PIN = 16
GREEN_LED_PIN = 17
BUZZER_PIN = 13
#initialize components
servo = PWM(Pin(SERVO_PIN), freq=50, duty=77)
i2c = I2C(0, scl=Pin(I2C_SCL_PIN), sda=Pin(I2C_SDA_PIN), freq=100000)
oled = SSD1306_I2C(128, 64, i2c)
red_led = Pin(RED_LED_PIN, Pin.OUT)
green_led = Pin(GREEN_LED_PIN, Pin.OUT)
buzzer = PWM(Pin(BUZZER_PIN), freq=1000, duty=0)
#functtion to move the servo to a specific angle
def move_servo(angle):
duty_cycle = int(((angle / -180)*77)+77)
servo.duty(duty_cycle)
sleep(0.5)
def control_output(status):
if status == "running":
red_led.on()
green_led.off()
buzzer.duty(0)
elif status == "complete":
red_led.off()
green_led.on()
buzzer.duty(512)
#function to display a message on the OLED
def display_message(message):
oled.fill(1)#make the OLED background white
#main loop
while True:
display_message("Press A Button")
button_pressed = False
for i, button_pin in enumerate(BUTTON_PINS):
button = Pin(button_pin, Pin.IN, Pin.PULL_UP)
if button.value() == 0:
button_pressed = True
if i == 0:
angle = 30
message = "5ml Dispensed"
elif i == 1:
angle = 60
message = "10ml Dispensed"
elif i == 2:
engle = 90
message = "15ml Dispensed"
elif i == 3:
angle = 120
message = "20ml Dispensed"
volume = (i+1)*5
display_message(message)
control_outputs("running")
move_servo(angle)
sleep(0.5)
control_outputs("complete")
display_message("")
if not button_pressed:
buzzer.duty(0)
sleep(0.1)