Hey Guys, Welcome back to electronicsInnovation. In this video, I'm gonna show you how you
can Change & Store ESP32 WiFI Credentials into EEPROM without uploading a single line
code from Arduino IDE. This feature will make your IoT Projects easily
accessable and more reliable. So, without wasting time let's get started. PCB Way ADD: If you want to convert your prototype projects
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check out their website for more details. Electronics Innovation Intro In all of my previous tutorials, I used to
enter WiFi credentials in the program and hard code into the module as shown here. In case If I wanted to change SSID or password,
I should take out the module from the project and connect with my laptop to dump the updated
code. But, while working with Sonoff, I found that
there is a provision to enter and change the wifi credentials through the mobile itself. So I have decided to implement the same thing
on ESP32 module. I have already developed the same feature
on ESP8266. but so many people have approached me for
the same feature on ESP32, So I have decided to make this tutorial to help you all. Required components: 1. Breadboard
2. ESP32 Module
3. 10k Resistor
4. Push-button
5. Connecting wires
6. Data Cable to Program ESP32. Here is the Circuit diagram. I have added this external trigger circuit
to add " On-Demand Credentials update feature" If we wanted to update the wifi credentials,
we can trigger the ESP32 by simply holding this push-button for 2 to 3 seconds. The push-button is used to generate an external
trigger at GPIO15 of ESP32 with a High pulse. This 10k resistor is used to pulldown the
GPIO15 to 0 at the absence of high Pulse. After all connections. The circuit will be something like this. Coming to the programming part, Here is the
code for ESP32_WiFi credential update wirelessly. This code will be available on the Project
Page which is mentioned in the description below. As we are using the ESP32 camera module, we
should have the esp32 addon installed in our Arduino Ide. I have already installed it. You can install it by following the above
tutorial. These are the libraries we are using, all
these libraries are pre-installed. you don't have to install them again. These are the global variables, If you wanted
to have default wifi, you can provide the credentials here. any way it can be changed later. Declaration of functions, testWifi, launchWeb,
setupAP Establishing local server at port 80 Coming to the Void Setup, Initializing serial monitor with baud rate
115200 for debugging. Disconnecting from the current WiFi network initializing EEPROM Memory Configuring GPIO15 as input to read the external
trigger. Reading SSID from the EEPROM, and storing
it into the esid, Reading password from the EEPROM, and storing into the epass. Then beginning the WiFi with SSID and Password
which are read from the EEPROM. Coming to the void loop, Checking the wifi connection status, If WiFi
is connected, a status message is Printing on the serial monitor. this message will be printed over 10 times
using this for loop. You can add your main project code here. for example you wanted to read temperature
data frm a sensor, and post it to the AWS server or Ubidots. That project code can be integrated here. Testing the wifi connection and External Trigger If both are true, printing a message "Connection
status positive" on the serial monitor. If either Test WiFi or External trigger is
false, Calling functions Launchweb and Setup Accesspoint along with printing a message
on the serial monitor. handling server-client, if not connected to
any wifi. Here is the function to test WiFi, it will
return True or false based on the connection status. Here is the function to launch a web server,
This will print the IP and call another function to create a Web server. Here is another function to Setup Accespoint
and scan the available WiFi networks. You can enter the Accesspoint SSID here, I
have entered ElectronicsInnovation. if you want your network to be secured, you can enter
the password, if you want to keep it open, just leave it blank. Here is the most important function to create
a basic web server, where we can enter the updated SSID and password. this will also write the newly received WiFi
Credentials into the EEPROM memory. Let's upload this code to ESP32 Module. Connect the ESP32 module with a laptop. Check the
Uploading configurations like board: ESP32 Wroover Module, Uploading Speed, and select
the right port. If everything is okay Upload it. Till then the code gets uploaded I wanted
to let you know one thing about our channel, as you can see here, 95.8% of the people who
are watching videos in our channel are not subscribed, If you are new to this channel,
or you didn't subscribe yet, i request you to subscribe and opt to recieve notifications
if and only if you find this video is something informative & usefull to you. While Arduino log shows like this, press and
holds the boot button until it turns as writing at some address, then release it. After successful uploading opens the serial
monitor. On the serial monitor, we can see ESP32 read
the SSID and Password from EEPROM, but there is nothing. So, with that Empty SSID and Password, it
tried to connect but failed. So, the connection status is negative. now created its own Access point to allow
us to update the WiFi Credentials with IP address 192.168.4.1 and then Started server. Copy this IP Address, Connect to the freshly created access point,
in my case it's ElectronicsInnovation. After successful connection, point your browser
to the copied Ip address which is 192.168.4.1 Here you can see the all available wifi networks,
I wanted to connect to my home wifi which is The Dark Knight Rises. Enter the SSID and password then submit the
query. As soon as you submit, you can see the same
data has been written into the EEPROM. Then Disconnected from the current wifi connection
and Read freshly updated credentials from EEPROM and Successfully connected to it. Now, it started printing a message "
Connected to the Dark Knight Rises Successfully" Let's see On-Demand Credentials Update feature. As soon as I click on the Push button, It
read the external Interrupt from GPIO15 and disconnected from the current Wifi Network. Also started the webserver with IP 192.168.4.1 Copy this Ip, Connet to Electronics Innovation. Point your browser to Copied IP. Here you can see the all available wifi networks,
I wanted to connect to my mobile wifi which is EI. Enter the SSID and password then submit the
query. As soon as you submit, you can see the same
data has been written into the EEPROM. Then Disconnected the current wifi connection
and Read freshly updated credentials from EEPROM. This time, it got EI as SSID and Subscribe
as a password. So, using these updated credentials, it successfully
connects to the new WiFi network and started printing a message " Connected to EI Successfully"
as expected. You can also do the same process on the Mobile,
Simply takeout your mobile and point your favorite browser to 192.168.4.1 and update
the WiFi credentials seamlessly. So, That's it for this tutorial. This how we can Change & Store ESP32 WiFI
Credentials into EEPROM without uploading a single line of code from Arduino IDE. I hope you like this On-demand WiFi credentials
update feature. Try integrating this feature in your existing
projects, or Upcoming projects and let me know your thoughts in the Comments section. If you feel this feature will help you to
make your IoT Projects more handy and reliable, give a big thumbs-up to the video and share
it with your IoT Partner. See you soon on the next interesting project,
bubyeee... మరిన్ని ఆసక్తికరమైన
ప్రాజెక్ట్స్ తో మీ ముందుకు వస్తాను,
అంత వరకు సెలవు, నమస్కారం.
