MicroPython Forum (Archive)

Code: Select all

import pyb
import os

pressed = False

def switch_cb():
    global pressed

    pressed = True

def timer_cb(timer):
    pyb.LED(1).toggle()
    
def main():

    pyb.LED(2).on()
    os.mount(pyb.SDCard(), '/sd')
    os.chdir('/sd')

    try:
        with open("boot_file.txt","r") as f:
            info=f.readline()
    except OSError:
        info=None
        
    if "boot_file.txt" in os.listdir():
        os.remove("boot_file.txt")
        
    blue=pyb.LED(4)
    blue.off()
    yellow=pyb.LED(3)
    yellow.on()

    print("")
    
    with open("data_file.txt","a") as f:
        while not pressed:
            f.write("hello world.\n")

            print(".",end="")
            
            for _ in range(60):
                if pressed:
                    break
                pyb.delay(1000)

            yellow.toggle()
            blue.toggle()

    print("")        
    blue.off()
    yellow.off()

    with open("boot_file.txt", "w") as f:
        f.write("saved state for next time\n")
        
    os.umount('/sd')
    pyb.LED(2).off()


if __name__ == "__main__":

    switch = pyb.Switch()
    switch.callback(switch_cb)

    timer = pyb.Timer(14, freq=3)
    timer.callback(timer_cb)
    pyb.delay(5000)
    timer.callback(None)
    
    main()

Code: Select all

sample_amount = 50
data_buffer = [[] for i in range(sample_amount)]  # List of lists to collect data
for loop_value in range(sample_amount):
    #Read sensor or get data values
    data = read_sensor()
    data_buffer[loop_value] = '{},'.format(data)
#Write data to txt file after enough samples are taken:
data_file = open('measurements.txt', 'w')
for each_data_value in data_buffer:
    data_file.write(each_data_value)
data_file.close()