from machine import ADC
import utime
AnalogIn = ADC(0) # ADC channel 0
Conv = 3300 / 65535 # Conversion factor
file = open("Temp.txt", "w") # Create a new file
file.write("Ambient Temperature\n") # Write heading
for secs in range(30): # Do forever
 V = AnalogIn.read_u16() # Read temp
 mV = V * Conv # Convert to Volts
 Temp = (mV - 500.0) / 10.0 # Convert to temp
 Tempstr = str(Temp)[:5] # Convert to string
 data = str(secs+1) + " " + Tempstr + "\n"
 file.write(data) # Write to file
 utime.sleep(1) # Wait 1 second
 
file.close() # Close file
print("Data has been written to file...")