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There are cases, however, where libraries require other libraries internally. The

internally required library is called a dependency. In the event of library

dependencies, the easiest way to figure out what other libraries are required is to

connect to the serial console and follow along with the ImportError printed there.

The following is a very simple example of an ImportError , but the concept is the

same for any missing library.

Example: ImportError Due to Missing

Library

If you choose to load libraries as you need them, or you're starting fresh with an

existing example, you may end up with code that tries to use a library you haven't yet

loaded. This section will demonstrate what happens when you try to utilise a library

that you don't have loaded on your board, and cover the steps required to resolve the

issue.

This demonstration will only return an error if you do not have the required library

loaded into the lib folder on your CIRCUITPY drive.

Let's use a modified version of the Blink example.

import board

import time

import simpleio

led = simpleio.DigitalOut(board.LED)

while True:

led.value = True

time.sleep(0.5)

led.value = False

time.sleep(0.5)

Save this file. Nothing happens to your board. Let's check the serial console to see

what's going on.

Adafruit ESP32-S3 User Manual

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