IoT-For-Beginners/translations/en/4-manufacturing/lessons/3-run-fruit-detector-edge/wio-terminal.md

Classify an image using an IoT Edge based image classifier - Wio Terminal

In this part of the lesson, you will use the Image Classifier running on the IoT Edge device.

Use the IoT Edge classifier

The IoT device can be configured to use the IoT Edge image classifier. The URL for the Image Classifier is http://<IP address or name>/image, where <IP address or name> should be replaced with the IP address or host name of the computer running IoT Edge.

Task - use the IoT Edge classifier

1. Open the fruit-quality-detector app project if it’s not already open.

2. The image classifier operates as a REST API using HTTP, not HTTPS, so the call must use a WiFi client that supports HTTP calls only. This means the certificate is not required. Remove the CERTIFICATE from the config.h file.

3. Update the prediction URL in the config.h file to the new URL. You can also remove the PREDICTION_KEY as it is not needed.

   const char *PREDICTION_URL = "<URL>";
   

   Replace <URL> with the URL for your classifier.

4. In main.cpp, modify the include directive for the WiFi Client Secure to import the standard HTTP version:

   #include <WiFiClient.h>
   

5. Update the declaration of WiFiClient to use the HTTP version:

   WiFiClient client;
   

6. Locate the line that sets the certificate on the WiFi client. Remove the line client.setCACert(CERTIFICATE); from the connectWiFi function.

7. In the classifyImage function, delete the line httpClient.addHeader("Prediction-Key", PREDICTION_KEY); that sets the prediction key in the header.

8. Upload and run your code. Point the camera at a piece of fruit and press the C button. You will see the output in the serial monitor:

   Connecting to WiFi..
   Connected!
   Image captured
   Image read to buffer with length 8200
   ripe:   56.84%
   unripe: 43.16%
   

💁 You can find this code in the code-classify/wio-terminal folder.

😀 Your fruit quality classifier program worked perfectly!

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