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I don't understand why "sudo python3 temphumlogger2.py" triggers a module error, while "python3 temphumlogger2.py" executes no problem. Outputs below, and code below that. I want the code to execute automatically on startup, and need to use sudo to do that. I've tried reinstalling the various packages but can't figure out why sudo causes error and without does not?

pi@raspberrypi:~ $ sudo python3 temphumlogger2.py  
Traceback (most recent call last):  
  File "temphumlogger2.py", line 3, in <module>  
    import adafruit_dht
ModuleNotFoundError: No module named 'adafruit_dht'

pi@raspberrypi:~ $ python3 temphumlogger2.py  
waiting 15 mins  
Temp: 73.9 F / 23.3 C    Humidity: 48.0% 

import time
import board
import adafruit_dht
from datetime import datetime

Initial the dht device, with data pin connected to:


dhtDevice = adafruit_dht.DHT22(board.D4)


while True:
    try:
        # Print the values to the serial port
        temperature_c = dhtDevice.temperature
        temperature_f = temperature_c * (9 / 5) + 32
        humidity = dhtDevice.humidity
        with open('/home/pi/thdataupstairs.csv', mode='a') as file_:
            file_.write("{},{},{}".format(datetime.now(),temperature_c, humidity))
            file_.write("\n")
        print("waiting 15 mins")
        print(
            "Temp: {:.1f} F / {:.1f} C    Humidity: {}% ".format(
                temperature_f, temperature_c, humidity
            )
        )
        time.sleep(10)


except RuntimeError as error:
    # Errors happen fairly often, DHT's are hard to read, just keep going
    print(error.args[0])

time.sleep(2.5)
Jake
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mechoption
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1 Answers1

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I used sudo bash to enter commands as sudo and found python3 temphumlogger2.py had same error. Within this sudo bash window I followed the CircuitPython instructions here to install all the modules again. After that temphumlogger.py now runs with and without sudo when I log in as pi.

As per comments I think I installed things as user instead of sudo.

mechoption
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