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Interfacing TTP226 8-channel capacitive touch module
The EzloPi smart devices provide automation through simple, customizable use with our open-source EzloPi platform, making daily life easier and improving human-machine interactions.
Before moving into this example, it is very important to know about the device registration, provisioning and converting the ESP32 device into an EzloPi device along with knowledge of config.ezlopi.com Web Flasher, MiOS Mobile Application for Android/iOS and the MiOS Web Application.
1. About this example
The project aims to interface an 8-channel touch sensor module TTP226 with the EzloPi device. This integration will enable the EzloPi device to detect touch inputs across its eight channels, expanding its functionality for tactile interaction. The TTP226 module offers sensitivity and reliability in detecting touch inputs, making it suitable for various control applications such as controlling the state of eight LED lamps or relays using the touch sensor module as a touch switch.
Through this project, users can harness the capabilities of the EzloPi device and the TTP226 touch module for interactive control in their smart home systems, IoT applications, or other projects requiring touch-sensitive inputs. Overall, this project enhances the usability and versatility of the EzloPi device by incorporating touch sensing capabilities.
2. Project Demonstration Video
Welcome to the project demonstration video section. The following video showcases the key aspects of Interfacing TTP226 8-channel capacitive touch module, providing a visual walkthrough of its implementation.
3. Circuit Diagram & Interface
The following components are required for interfacing with the EzloPi device:
- ESP32 as an EzloPi smart device.
- TTP226 8-channel digital touch sensor.
The wiring diagram of ESP32 30 pin is represented as follows:
The following connections are made in order to complete the circuit setup:
From ESP32 to the TTP226 module:
ESP32 | TTP226 |
3V3 | VCC |
GND | GND |
D4 | OUT1 |
D5 | OUT2 |
D15 | OUT3 |
D18 | OUT4 |
D12 | OUT5 |
D19 | OUT6 |
D22 | OUT7 |
D23 | OUT8 |
4. Interfacing the TTP226 8-channel Touch sensor module using the EzloPi Web Flasher
1. Set up your device/hardware by visiting config.ezlopi.com
- Log in using the credentials which you just set earlier while signing up.
- Now, click on the Connect Device button and a pop-up window will appear.
- Now, select COM Port to which your ESP32 device is connected. In our case, the COM3 port is used.
Click Connect
- If you are new to this and it's your first time configuring, select Create new Device ID. Click on the Configure Wifi button. Enter Wifi SSID and Wifi Password.
- In the Device Configuration, tab click on Digital Input.
- A Digital Input window will open for inputting the following parameters:
- Set Device name to Touch 01.
- Set OUT GPIO to 4.
- Set Device subtype to Touch Switch (Toggle) TTP223B.
- Set the default value to LOW.
- Now Click the Apply button.
- Again, In the Device Configuration, tab click on Digital Input.
- A Digital Input window will open for inputting the following parameters:
- Set Device name to Touch 02.
- Set OUT GPIO to 5.
- Set Device subtype to Touch Switch (Toggle) TTP223B.
- Set the default value to LOW.
- Now Click the Apply button.
- Again, In the Device Configuration, tab click on Digital Input.
- A Digital Input window will open for inputting the following parameters:
- Set Device name to Touch 03.
- Set OUT GPIO to 15.
- Set Device subtype to Touch Switch (Toggle) TTP223B.
- Set the default value to LOW.
- Now Click the Apply button.
- Again, In the Device Configuration, tab click on Digital Input.
- A Digital Input window will open for inputting the following parameters:
- Set Device name to Touch 04.
- Set OUT GPIO to 18.
- Set Device subtype to Touch Switch (Toggle) TTP223B.
- Set the default value to LOW.
- Now Click the Apply button.
- Again, In the Device Configuration, tab click on Digital Input.
- A Digital Input window will open for inputting the following parameters:
- Set Device name to Touch 05.
- Set OUT GPIO to 12.
- Set Device subtype to Touch Switch (Toggle) TTP223B.
- Set the default value to LOW.
- Now Click the Apply button.
- Again, In the Device Configuration, tab click on Digital Input.
- A Digital Input window will open for inputting the following parameters:
- Set Device name to Touch 06.
- Set OUT GPIO to 19.
- Set Device subtype to Touch Switch (Toggle) TTP223B.
- Set the default value to LOW.
- Now Click the Apply button.
- Again, In the Device Configuration, tab click on Digital Input.
- A Digital Input window will open for inputting the following parameters:
- Set Device name to Touch 07.
- Set OUT GPIO to 22.
- Set Device subtype to Touch Switch (Toggle) TTP223B.
- Set the default value to LOW.
- Now Click the Apply button.
- Again, In the Device Configuration, tab click on Digital Input.
- A Digital Input window will open for inputting the following parameters:
- Set Device name to Touch 08.
- Set OUT GPIO to 23.
- Set Device subtype to Touch Switch (Toggle) TTP223B.
- Set the default value to LOW.
- Now Click the Apply button.
- After clicking the apply button you can see a table of your setting in the device configuration tab.
- Press the Flash Device button.
- A window will appear on the bottom right side of the screen displaying “Please press BOOT button while flashing begins.”
- Hold the BOOT button down until the next window appears on the bottom right side of the screen which says “Installation prepared. Please release the boot button now.”
- Release the BOOT button from your ESP32 when this pop-up on the bottom right window appears.
- After some time, a popup will appear saying Device Flashed Successfully! This means that your device has been set up successfully.
5. MiOS App
You can download the MIOS Android app from the Google Play Store and Apple App Store.
- After downloading the app, proceed to install the application and open it.
- Using the MIOS mobile application, create a new Ezlo Cloud account using the sign-up option. If you already have an account, you may proceed to log in.
- After successfully logging in, you will be able to see the number of controllers connected such as a lamp, fan, or any other device in the MiOS app. Tap on any controller of your desired ID:
- You will be able to see the status of your controller whether it is online or offline. Access the device dashboard, and tap the device. The following view of the dashboard will appear:
- After opening the MiOS mobile dashboard, you will be able to see the tile of your connected device. The state of all the eight touch switches can be controlled by just touching on the tiles for each touch switch.
- Currently, all the tiles for the touch switches are OFF, which indicates that all the touch switches are OFF.
- Similarly, it can now be seen that after touching one by one on each touch sensor on the touch module, the touch switches turn ON as indicated by the tiles. Additionally, we can also create meshbot conditions/rules for controlling various devices such as LEDs and relays for our smart home use or automation purpose.
5. MiOS Web Dashboard
- After configuring the controller with the EzloPi web flasher, head to ezlogic.mios.com
- Use the same credentials to log in that you used for configuring the controller with the web flasher.
- After opening the MiOS web dashboard, you will be able to see the tile of your connected device. The state of all the eight touch switches can be controlled by just touching on the tiles for each touch switch.
- Currently, all the tiles for the touch switches are OFF, which indicates that all the touch switches are OFF.
- On the dashboard, it can now be seen that after touching one by one on each touch sensor on the touch module, the touch switches turn ON as indicated by the tiles. Additionally, we can also create meshbot conditions/rules for controlling various devices such as LEDs and relays for our smart home use or automation purpose.
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