Arduino / ESP32 Projects

ESP32 - Complex Waveform Generator V2
ESP32 - CWG Driver & Amplification
ESP32 - Complex Waveform Generator V3

ESP32 - Complex Waveform Generator V2

Setting Up The App

ESP32 Complex Waveform Generator - Arrangement for WROOM-32 or WROVER-E (DevKit-C)

PARTS Required

1 - ESP32 (WROOM-32 or WROVER-32) with 16 exposed pins
1 - ESP32 Breakout Board or equivalent pin header block
7 - Rotary Encoders (i.e. KY-040 Rotary Encoder Module CYT1062)
- TODO: add >= 2 more for Elongation adjustments.
1 - +5VREG 1A Power Supply for ESP32 (i.e. ATX PowerSupply)

Installation Prerequisites

Install ESP Libraries in Arduino-IDE v2.0

ArduinoJson
ESP32Encoder

Step 1. Open Esp32Full.ino and set Wifi Credentials

// #### Change Me - Local Wifi Info ####
const char *SSID = "NETGEAR";
const char *PWD = "12345678";

Step 2. Configure free local LAN IP address

Check your Router for more information

// #### CHANGE ME ####
// Set your Static IP address to a free IP in your local network
IPAddress local_IP(192, 168, 1, 8);
// Set your Gateway IP address
IPAddress gateway(192, 168, 1, 1);

IPAddress subnet(255, 255, 255, 0);
IPAddress primaryDNS(8, 8, 8, 8);   //optional
IPAddress secondaryDNS(8, 8, 4, 4); //optional

Step 3. Configure ESP_HOST in Javascript File

Edit `./assets/espwavegen.js` and set the IP address used in Step 2 above.

TODO: Make configurable in the web interface

Save and close the file

Step 3. Upload The code in `Esp32Full.ino`

Paste the code into your Arduino-IDE and upload it to your ESP32

Installing the ESP32 Board in Arduino IDE

Step 4. Access the WebApp in your Web Browser

Open Web Browser
Open `index.html` in the `WebApp` directory below this file

File -> Open -> Browse to WebApp/index.html -> Open

Interface is now displayed!

Step 5: Enjoy!!

Please post pics and videos of your waves, and let others know how achievable this is!

Need Amplification?

See: ESP32 - Complex Waveform Generator - Driver & Amplification

Additional Troubleshooting / Customization

Optional: Configure alternate Output Pins

Output will be on Pins D2 and D4 by default

// #### Output Pins ####
int pinChannel1 = 2;
int pinChannel2 = 4;

Optional: Adjust Encoder Pins if needed

int pulseCount_EncoderPIN1 = 14;
int pulseCount_EncoderPIN2 = 13;
int pulseWidth_EncoderPIN1 = 35;
int pulseWidth_EncoderPIN2 = 34;
int pulseSpace_EncoderPIN1 = 19;
int pulseSpace_EncoderPIN2 = 18;
int gate_freq_EncoderPIN1 = 22;
int gate_freq_EncoderPIN2 = 23;

int pulseWidthModifier_EncoderPIN1 = 27;
int pulseWidthModifier_EncoderPIN2 = 26;
int pulseSpaceModifier_EncoderPIN1 = 5;
int pulseSpaceModifier_EncoderPIN2 = 32;
int gateModifier_EncoderPIN1 = 25;
int gateModifier_EncoderPIN2 = 33;

ESP C+ Code

Git Repo: https://bitbucket.org/cbake6807/esp32-complex-waveform-generator/src/master/

Troubleshooting:

View the Console Log for errors in your browser while clicking the app's sliders buttons etc..

Look in the Network tab for red errors. 404 or other. Sometimes the ESP may drop or reject the connection on the first attempt. Just refresh the browser once or twice and it should resolve.

https://www.browserstack.com/guide/inspect-element-in-chrome#:~:text=One%20of%20the%20easiest%20ways,%2C%20Sources%2C%20and%20other%20tools.

Confirm the ESP is a connected host in your network and was given the IP you specified

https://www.wikihow.com/See-Who-Is-Connected-to-Your-Wireless-Network

Code notes if internet connectivity isn't an option. Also, encoder wiring connections for this particular setup (Notepad++ document file type). Chris Bake ESP32 notes.txt

Notepad++ download: Notepad++

ESP32 - CWG Driver & Amplification

A dual channel, dual isolated power supply, pulse amplification for driving all VIC arrangements

Arrangement favoring Particle Oscillation as an Energy Generator

Variation 2 - Ground Bonded / "Forced" Uni-polar Operation

ESP32 - Complex Waveform Generator V3

Installing and Using the ESP32 Complex Waveform Generator V3 Application

Screenshot of web interface

Prerequisites

To use this application, you need to have the Arduino IDE installed on your computer. You can download the Arduino IDE from the official website: https://www.arduino.cc/en/software

ESP32 Development Board: You'll need an ESP32 development board, such as the popular ESP32-DevKitC or ESP32-WROOM-32D. These boards typically come with Wi-Fi and Bluetooth capabilities and a variety of GPIO pins for interfacing with peripherals.
Rotary Encoders: To adjust the waveform parameters, you will need a total of 7 rotary encoders. You can use KY-040 rotary encoder modules or any other type of incremental rotary encoder with built-in push buttons. Ensure that the rotary encoders you choose have a CLK, DT, and SW (push button) pinout.
Breadboard and Jumper Wires: A breadboard and jumper wires are required to make the necessary connections between the ESP32 development board and the rotary encoders.
Power Supply: You will need a power supply to power the ESP32 development board. This can be a USB power supply, a battery, or any other suitable power source that meets the board's voltage and current requirements, such an ATX Supply from a computer. 5VDC 1A minimum is recommended to prevent brownout conditions while interacting with a driver circuit.
Oscilloscope (optional): To visualize the generated waveform, you can use an oscilloscope. Connect the output pins (channel1OutputPin and channel2OutputPin) from the ESP32 development board to the oscilloscope's input channels.

Installing required libraries

ArduinoJson: To install the ArduinoJson library, follow these steps: a. Open the Arduino IDE. b. Click on Tools in the menu bar, then Manage Libraries. c. In the Library Manager window, search for "ArduinoJson" in the search bar. d. Find "ArduinoJson by Benoit Blanchon" in the search results and click on the Install button.
ESP32Encoder: To install the ESP32Encoder library, follow these steps: a. Open the Arduino IDE. b. Click on Tools in the menu bar, then Manage Libraries. c. In the Library Manager window, search for "ESP32Encoder" in the search bar. d. Find "ESP32Encoder by Gil Mora" in the search results and click on the Install button.

Uploading the Application

Download the source code for the ESP32 Complex Waveform Generator V3 application or copy it to a new file in the Arduino IDE.
Connect the ESP32 development board to your computer using a USB cable.
In the Arduino IDE, select the appropriate board and port under Tools > Board and Tools > Port.
Click on the Upload button (right-facing arrow icon) in the Arduino IDE to compile and upload the application to the ESP32 development board.

Hardware Setup

Wire the rotary encoders and other components according to the pin assignments defined in the source code.

ESP32 Pin	Encoder Connection	Encoder Function
14	Pulse Encoder CLK	Pulse count
13	Pulse Encoder DT	Pulse count
35	Width Encoder CLK	Pulse width
34	Width Encoder DT	Pulse width
19	Spacing Encoder CLK	Pulse spacing
18	Spacing Encoder DT	Pulse spacing
23	Off-time Encoder CLK	Off-time
22	Off-time Encoder DT	Off-time
27	Width Mod Encoder CLK	Width modifier
26	Width Mod Encoder DT	Width modifier
15	Spacing Mod Encoder CLK	Spacing modifier
32	Spacing Mod Encoder DT	Spacing modifier
33	Off-time Mod Encoder CLK	Off-time modifier
4	Off-time Mod Encoder DT	Off-time modifier
2	Output Channel 1	Output waveform
5	Output Channel 2	Output waveform

Make sure the connections are secure and verify the CLK/DT pins for each encoder are wired correctly, and that each encoder turns in the correct direction relative to the respective parameter change.

Using the Application

Power on the ESP32 development board.
Use the rotary encoders to adjust the following parameters:
- Pulse count
- Pulse width
- Pulse spacing
- Off-time
- Width modifier
- Spacing modifier
- Off-time modifier
The application will generate a complex waveform based on the adjusted parameters.
Connect the output pins (channel1OutputPin and channel2OutputPin) to an oscilloscope to visualize the generated waveform.
Open the WebApp/index.html page in a browser.
Fine-tune the parameters using the rotary encoders to achieve the desired waveform shape and characteristics.

Next Steps For Utilization

Build ESP32 CWG - VIC Driver circuit(s) - https://stanslegacy.com/books/chris-bake/page/esp32-cwg-driver-amplification
Cell Construction - https://stanslegacy.com/books/ethan-crowder/page/resonant-cavity-related

Troubleshooting

If the waveform does not match the expected output, verify the wiring connections and ensure the rotary encoders are functioning correctly.
If the application does not upload to the ESP32 development board, double-check the board and port selection in the Arduino IDE.
If the rotary encoders behave unexpectedly (e.g., adjusting one parameter affects another), check the CLK/DT pin assignments and wiring.
Click the PInout button to fetch the currently defined GPIO pins from the ESP32 directly and confirm they are wired correctly.

For further assistance or to report any issues, contact the application's support team or refer to the community forums.