Raspberry Pico Project Data Logger

Raspberry Pi Pico demo project data logger.

Battery power for Raspberry Pico , battery 18650 shield BME280 temperature and pressure sensor and start button You need BME280 library in MicroPython Thonny IDE.

Code:

from machine import Pin, I2C 

import time

import BME280 

# PICO - Pins

sda=machine.Pin(16)

scl=machine.Pin(17)

i2c=machine.I2C(0,sda=sda, scl=scl, freq=400000)

led1 = Pin(25, Pin.OUT)

button_start = Pin(2, Pin.IN, Pin.PULL_DOWN) # Start button

# Data logging time in seconds

LOGt = 600 

 

# Data logging interval in seconds 

LOGi = 10

i=0

while button_start.value() == 0:

    led1.value(0) # Board led off 

else:

    tpfile=open("TempPres.txt","w")  # w Opens a file for writing only and will create a new file       

    while i < (LOGt/LOGi):

         led1.value(1) # Board led on          

         bme = BME280.BME280(i2c=i2c)

         temp = bme.temperature

  ##     hum = bme.humidity  No humidity in BMP280

         pres = bme.pressure

  ##   tempf temperature in Fahrenheit

  ##     tempf = (bme.read_temperature()/100) * (9/5) + 32

  ##     tempf = str(round(tempf, 2)) + 'F'

  ##     print('Temperature:', temp ,tempf, '  Pressure: ',pres)  

  ##     print('Humidity: ', hum)

     

         tpfile.write(str(temp + ' , ' + pres) + "\n")

         tpfile.flush()

  

         time.sleep(LOGi)

         i += 1

              

         led1.value(0) # Board led off

  

Project Data Logger Video

Thonny shell use for open the file file=open("TempPres.txt") print (file.read())

Pinouts for the project: