How to use water flow sensor(Yf-s201) on Raspberry Pi Pico?

Question

#!/usr/bin/python
import RPi.GPIO as GPIO
import time, sys
#import paho.mqtt.publish as publish
 
FLOW_SENSOR_GPIO = 13
#MQTT_SERVER = "192.168.1.220"
 
GPIO.setmode(GPIO.BCM)
GPIO.setup(FLOW_SENSOR_GPIO, GPIO.IN, pull_up_down = GPIO.PUD_UP)
 
global count
count = 0
 
def countPulse(channel):
   global count
   if start_counter == 1:
      count = count+1
 
GPIO.add_event_detect(FLOW_SENSOR_GPIO, GPIO.FALLING, callback=countPulse)
 
while True:
    try:
        start_counter = 1
        time.sleep(1)
        start_counter = 0
        flow = (count / 7.5) # Pulse frequency (Hz) = 7.5Q, Q is flow rate in L/min.
        print("The flow is: %.3f Liter/min" % (flow))
        #publish.single("/Garden.Pi/WaterFlow", flow, hostname=MQTT_SERVER)
        count = 0
        time.sleep(5)
    except KeyboardInterrupt:
        print('\nkeyboard interrupt!')
        GPIO.cleanup()
        sys.exit()

This is the raspberry pi code I want to raspberry pi pico code

score 0 · Answer 1 · answered Nov 02 '22 at 11:55

try this code

from machine import Pin
import time
 
FLOW_SENSOR_GPIO = 13
flow = Pin(FLOW_SENSOR_GPIO , Pin.IN, Pin.PULL_UP)
 
global count
count = 0
 
def countPulse(channel):
   global count
   if start_counter == 1:
      count = count+1
 
flow.irq( trigger=Pin.IRQ_FALLING, callback=countPulse)
 
while True:
    try:
        start_counter = 1
        time.sleep(1)
        start_counter = 0
        flow = (count / 7.5) # Pulse frequency (Hz) = 7.5Q, Q is flow rate in L/min.
        print("The flow is: %.3f Liter/min" % (flow))
        count = 0
        time.sleep(5)
    except KeyboardInterrupt:
        print('\nkeyboard interrupt!')
        break

How to use water flow sensor(Yf-s201) on Raspberry Pi Pico?

1 Answers1