• Home
  • Archive
  • Tools
  • Contact Us

The Customize Windows

Technology Journal

  • Cloud Computing
  • Computer
  • Digital Photography
  • Windows 7
  • Archive
  • Cloud Computing
  • Virtualization
  • Computer and Internet
  • Digital Photography
  • Android
  • Sysadmin
  • Electronics
  • Big Data
  • Virtualization
  • Downloads
  • Web Development
  • Apple
  • Android
Advertisement
You are here: Home » ESP32 Arduino : IBM Watson Visual Recognition of Images with cURL

By Abhishek Ghosh March 15, 2019 1:03 am Updated on March 15, 2019

ESP32 Arduino : IBM Watson Visual Recognition of Images with cURL

Advertisement

IBM Watson Visual Recognition of Images Supports cURL. ESP32 Arduino Can Send cURL of Images and Receive JSON Response on Serial Monitor. Demo of Watson Visial Recognition can be found on this URL :

Vim
1
https://www.ibm.com/watson/services/visual-recognition/demo/#demo

WARNING : This testing project’s Arduino/ESP32 code may return blank response at present. It is for pointing to understand how the platform can be used from just ESP32.

The Lite (free) plan of IBM Watson Visual Recognition allows 1000 requests per month. That should be enough for testing and ordinary works. IBM Watson Visual Recognition supports up to 10 MB image size. Detailed documentation can be found on :

Advertisement

---

Vim
1
2
3
4
https://console.bluemix.net/apidocs/visual-recognition
https://github.com/IBM-Bluemix-Docs/visual-recognition/blob/master/getting-started.md
https://console.bluemix.net/docs/services/visual-recognition/tutorial-custom-classifier.html#tutorial-custom-classifier
https://www.ibm.com/watson/services/visual-recognition/demo/#demo

ESP32 Arduino IBM Watson Visual Recognition of Images with cURL

First we need an running Watson Visual Recognition service on IBM Cloud. Then generate a credidential. After generating the API, we will get example cURL (change the API key) like this :

Vim
1
curl -u "apikey:big_api_key_here" "https://gateway.watsonplatform.net/visual-recognition/api/v3/classify?url=https://watson-developer-cloud.github.io/doc-tutorial-downloads/visual-recognition/640px-IBM_VGA_90X8941_on_PS55.jpg&version=2018-03-19"

apikey is their set & allowed user name. If you run cURL appending -v with the above, you will see the request headers :

Vim
1
2
3
4
5
> GET /visual-recognition/api/v3/classify?url=https://watson-developer-cloud.github.io/doc-tutorial-downloads/visual-recognition/640px-IBM_VGA_90X8941_on_PS55.jpg&version=2018-03-19 HTTP/1.1
> Host: gateway.watsonplatform.net
> Authorization: Basic YXBpa2V5OmhBUG9lbzFGTUVxU3BBNjJ
> User-Agent: curl/7.47.0
> Accept: */*

It is an HTTP GET request with the above parameters. You can try this code for ESP32 :

Vim
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
#include <WiFi.h>
#include <WiFiMulti.h>
#include <HTTPClient.h>
#include <base64.h>
 
#define USE_SERIAL Serial
 
 
// <------- CHANGE PARAMETERS BELOW THIS LINE ------------>
 
const char* ssid = "your hotspot";
const char* password = "abcdefgh";
 
#define IMAGE "https://watson-developer-cloud.github.io/doc-tutorial-downloads/visual-recognition/640px-IBM_VGA_90X8941_on_PS55.jpg"
#define TOKEN "your-api"
#define DATE "2018-03-19"
 
// <------- CHANGE PARAMETERS ABOVE THIS LINE ------------>
 
String urlPath = "/visual-recognition/api/v3/classify?url=" IMAGE "&version=" DATE;
String urlHost = "gateway.watsonplatform.net";
int urlPort = 443;
String authHeader;
 
void setup() {
  Serial.begin(115200); Serial.println();
  initWifi();
    authHeader = "Authorization: Basic " + base64::encode("apikey:" TOKEN) + "\r\n";
}
 
void loop() {
  doWiFiClientSecure();
  delay(10000);
}
 
void doWiFiClientSecure() {
WiFiClientSecure client;
Serial.print("connect: "); Serial.println(urlHost);
while ( ! client.connect(urlHost.c_str(), urlPort)) {
    Serial.print(".");
}
Serial.println("Connected");
String msg = "GET" + urlPath + " HTTP/1.1\r\n"
                "Host: " + urlHost + "\r\n"
                "" + authHeader + ""
                "Content-Type: application/json\r\n"
                "User-Agent: curl/7.47.0\r\n";
                
client.print(msg);
Serial.print(msg);
 
Serial.print("\n*** Request sent, receiving response...");
while (!!!client.available()) {
    delay(50);
Serial.print(".");
  }
  
Serial.println();
Serial.println("Got response");  
  while(client.available()){
  Serial.write(client.read());
  }
Serial.println(); Serial.println("closing connection");
  client.stop();
}
 
void initWifi() {
  Serial.print("Connecting to: "); Serial.print(WiFi.SSID());
  WiFi.mode(WIFI_STA);  
  WiFi.begin(ssid, password);  
  while (WiFi.status() != WL_CONNECTED) {
     delay(250);
     Serial.print(".");
  }
  
  Serial.println("");
  Serial.print("WiFi connected, IP address: "); Serial.println(WiFi.localIP());
 
}

Open serial monitor. You will see this output :

Vim
1
2
3
4
5
6
7
8
9
10
Got response
 
closing connection
connect: gateway.watsonplatform.net
Connected
GET/visual-recognition/api/v3/classify?url=https://watson-developer-cloud.github.io/doc-tutorial-downloads/visual-recognition/640px-IBM_VGA_90X8941_on_PS55.jpg&version=2018-03-19 HTTP/1.1
Host: gateway.watsonplatform.net
Authorization: Basic YXBpa2V5OmhBUG9lbzFGTUVxU
Content-Type: application/json
User-Agent: curl/7.47.0

This output header indicating the logic is correct.

Unplug ESP32 after once run. The code will continiously ping the server. Notice the blank output. Although I have not used JsonHttpClient, these problems are not rare. I modified my old codes for IBM Watson IoT for testing.

Tagged With curl -x arduino esp32 , esp32 read image/jpeg , https://watson-developer-cloud github io/doc-tutoirial-downloads/visual-recognition/640px-IBM VGA , https://www ibm com/watson/services/visual-recognition/demo/#demo , ibm watson visual recognition , visual recognition , visual recognition with arduino , watson curl visual recognition url , watson visual recognition demo

This Article Has Been Shared 417 Times!

Facebook Twitter Pinterest

Abhishek Ghosh

About Abhishek Ghosh

Abhishek Ghosh is a Businessman, Surgeon, Author and Blogger. You can keep touch with him on Twitter - @AbhishekCTRL.

Here’s what we’ve got for you which might like :

Articles Related to ESP32 Arduino : IBM Watson Visual Recognition of Images with cURL

  • Introduction to MicroPython for ESP32

    Here is Introduction to MicroPython for ESP32. The Language Features of Python are Also Available in MicroPython Making ESP32 Super Powerful.

  • ESP32 Arduino : Create a Webpage to Control a Relay Module

    Here is How to Create a Webpage to Control a Relay Module Using ESP32 Arduino. This is a basic example which provides the base of advanced projects.

  • ESP32 Arduino and TM1637 Seven Segment LED Display

    TM1637 Seven Segment LED Display is Popular Thing in Arduino Prototyping World. Here is Some Words About Using TM1637 With ESP32 Arduino.

  • Arduino ESP32 : Turn on LED on Button Press and Turn Off After a Period

    Here is How to Turn on LED on Button Press and Turn Off After a Period on Arduino ESP32. For this guide, we will use onboard boot button and onboard LED.

  • Base64 Encoding on ESP32 Arduino (Base64 for Images)

    Base64 images are easy to transmit over the network. Here is How to Use Base64 Encoding on ESP32 Arduino. ESP32 lacks sufficient RAM.

Additionally, performing a search on this website can help you. Also, we have YouTube Videos.

Take The Conversation Further ...

We'd love to know your thoughts on this article.
Meet the Author over on Twitter to join the conversation right now!

If you want to Advertise on our Article or want a Sponsored Article, you are invited to Contact us.

Contact Us

Subscribe To Our Free Newsletter

Get new posts by email:

Please Confirm the Subscription When Approval Email Will Arrive in Your Email Inbox as Second Step.

Search this website…

 

Popular Articles

Our Homepage is best place to find popular articles!

Here Are Some Good to Read Articles :

  • Cloud Computing Service Models
  • What is Cloud Computing?
  • Cloud Computing and Social Networks in Mobile Space
  • ARM Processor Architecture
  • What Camera Mode to Choose
  • Indispensable MySQL queries for custom fields in WordPress
  • Windows 7 Speech Recognition Scripting Related Tutorials

Social Networks

  • Pinterest (24.3K Followers)
  • Twitter (5.8k Followers)
  • Facebook (5.7k Followers)
  • LinkedIn (3.7k Followers)
  • YouTube (1.3k Followers)
  • GitHub (Repository)
  • GitHub (Gists)
Looking to publish sponsored article on our website?

Contact us

Recent Posts

  • Cyberpunk Aesthetics: What’s in it Special January 27, 2023
  • How to Do Electrical Layout Plan for Adding Smart Switches January 26, 2023
  • What is a Data Mesh? January 25, 2023
  • What is Vehicular Ad-Hoc Network? January 24, 2023
  • Difference Between Panel Light, COB Light, Track Light January 21, 2023

About This Article

Cite this article as: Abhishek Ghosh, "ESP32 Arduino : IBM Watson Visual Recognition of Images with cURL," in The Customize Windows, March 15, 2019, January 29, 2023, https://thecustomizewindows.com/2019/03/esp32-arduino-ibm-watson-visual-recognition-of-images-with-curl/.

Source:The Customize Windows, JiMA.in

PC users can consult Corrine Chorney for Security.

Want to know more about us? Read Notability and Mentions & Our Setup.

Copyright © 2023 - The Customize Windows | dESIGNed by The Customize Windows

Copyright  · Privacy Policy  · Advertising Policy  · Terms of Service  · Refund Policy

We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept”, you consent to the use of ALL the cookies.
Do not sell my personal information.
Cookie SettingsAccept
Manage consent

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
CookieDurationDescription
cookielawinfo-checkbox-analytics11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
cookielawinfo-checkbox-functional11 monthsThe cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
cookielawinfo-checkbox-necessary11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
cookielawinfo-checkbox-others11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
cookielawinfo-checkbox-performance11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
viewed_cookie_policy11 monthsThe cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.
Functional
Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
Performance
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
Analytics
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
Advertisement
Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.
Others
Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.
SAVE & ACCEPT