LOLA Board

LOLA is an application board based on Espressif ESP32-S module designed to drive strip of WS2812B RGB led

Features

AI-Thinker ESP32-S module based on Espressif ESP32 CPU
ST MP34DT05-A PDM MEMS microphone (optional)
User defined push button
User defined WS2812B RGB led
MicroUSB power in at 5VDC (up to 3A)
Power-in PCB pads for higher current
Serial lines for ICP using a USB/serial interface
Enable and GPIO-0 terminal
PCB size: 53x28mm
Height: 5 mm

GPIO Used

#define LED_GPIO 13
#define STRIP_GPIO 14
#define BUTTON_GPIO 16
#define PDMCLK_GPIO 19
#define PDMDOUT_GPIO 18

Installing the Lola board in Arduino IDE

Download and install the Arduino IDE from this link:

https://www.arduino.cc/en/software

Open the menu Arduino -> Preferences

In the field Additional Board Manager URLs insert the URL:

https://dl.espressif.com/dl/package_esp32_index.json

the press the OK button

Open the menu Tools -> Boards -> Boards Manager..., type "ESP" and push the Install button as shown below:

then close the dialog box.

Select the menu Tools -> Boards -> ESP32 Arduino -> ESP32 Dev Module...

Insert the Lola programmer, give the power to the Lola microUSB port, copy this example and press the upload button.

To see the message send by the function Serial.println() select the menu Tools -> Serial Monitor the select the speed 115200

Basic example

This is a basic example just to check if the Lola board is working fine

void setup() {
  // put your setup code here, to run once:

  Serial.begin(115200);
  Serial.println("This is the setup function");
}

void loop() {
  // put your main code here, to run repeatedly:

  Serial.println("This is the loop");
  delay(1500);
}

Rainbow example

Simple rainbow effect on led strip

To use this example install the Adafruid NeoPixel library.

Open the menu Tools -> Manage Libraries...

Type "Neopixel" inside the filter field of Library Manager dialog box as shown below:

// *********************************
//  LOLA Basic example
//  Rainbow effect
// *********************************

#include <Adafruit_NeoPixel.h>

#define SerialMon Serial

#define LED_NUMBER 30

#define LED_PIN 13
#define STRIP_PIN 14
#define PB 16

// On-board LED
Adafruit_NeoPixel led(1, LED_PIN, NEO_GRB + NEO_KHZ800);

// Led strip
Adafruit_NeoPixel strip(LED_NUMBER, STRIP_PIN, NEO_GRB + NEO_KHZ800);

unsigned long t0 = millis();
bool isConnected = false;

int color_counter = 0;
bool rainbow = true;

// Brightness 
// Max 255
int brightness = 127;

void setup()
{
  Serial.begin(115200);
  Serial.println("Start");

  // Turn on on GREEN the on board led
  led.begin();
  led.setPixelColor(0, led.Color(0, 63, 0));
  led.show();

  pinMode(PB, INPUT);
}

long firstPixelHue = 0;

void loop()
{
  // Press the on-board led to switch to red all leds   
  if (digitalRead(PB) == 0)
  {
    strip.setBrightness(255);
    for (int i = 0; i < strip.numPixels(); i++)
    {
      strip.setPixelColor(i, led.Color(255, 0, 0));
    }
    strip.show();
    while (digitalRead(PB) == 0);
  }

  if (rainbow == true)
  {
    firstPixelHue += 256;
    if (firstPixelHue >= 3 * 65536)
    {
      firstPixelHue = 0;
    }

    for (int i = 0; i < strip.numPixels(); i++)
    {
      int pixelHue = firstPixelHue + (i * 65536L / strip.numPixels());
      strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue)));
    }
    strip.show();
    delay(5);
  }
}