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const byte LED_GPIO = 2;

volatile int interruptCounter;  // When this is not zero, we'll take a reading from the sensor
// The interrupt service routine will increment it.
// When the sensor is read, this variable is decremented.

volatile int blinkCounter = 0;

// The hardware timer pointer
hw_timer_t * timer = NULL;

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/*  06. Ultrasonic distance sensor HC-SR04 demo sketch 
 * 
 * This sketch calculates the distance between the HC-SR04 sensor and
 * an object directly infront of it.
 * 
 * To see the trigger and echo waveforms with your oscilloscope,
 * connect CHA to the trigger and CHB to the echo pins.
 * 
 * Set up edge trigger to CHA, and set it to 1V (or there about).
 * 

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/*  05. Arduino button oscilloscope demo sketch 
 * 
 * Use this sketch to see a button press as a waveform event in the
 * oscilloscope.
 * 
 * Connect CHA of the oscilloscope to the button signal pin.
 * 
 * Connect CHB to the anode of an LED.
 * 
 * Set the scope to 5us time scale and 200mV voltage scale.

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/*  07. Arduino PWM oscilloscope demo sketch 
 * 
 * Use this sketch to experiment with the measurement of a PWM waveform
 * on an oscilloscope.
 * 
 * Connect CHA of the oscilloscope to the anode of the LED.
 * 
 * Use a potentiometer to control the duty cycle.
 * 
 * Set triggering to Auto, and start the experiment.

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--[[
LJ - 07.30 - sine_wave_DAC0.lua

This script creates a rudimentary sine wave on DAC0.

Components
----------

- LabJack T4
- Oscilloscope

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// Requires Arduino Joystick Library https://github.com/MHeironimus/ArduinoJoystickLibrary
#include <Joystick.h>

const int8_t sw_1 = 18;
const int8_t sw_2 = 4;
const int8_t sw_3 = 6;

//Joystick_ Joystick;
Joystick_ Joystick(JOYSTICK_DEFAULT_REPORT_ID,
                   JOYSTICK_TYPE_JOYSTICK, 4, 0,

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void refresh_readings() {
  float f_temperature;
  float f_humidity;
  float f_pressure;
  float f_altitude;

  digitalWrite(LED_PIN, HIGH);

  postCounter++; // New post, increase the post counter

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from machine import I2C
import time

# BME280 default address.
BME280_I2CADDR = 0x76

# Operating Modes
BME280_OSAMPLE_1 = 1
BME280_OSAMPLE_2 = 2
BME280_OSAMPLE_4 = 3

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#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Max72xxPanel.h>

int pinCS = 10; // Attach CS to this pin, DIN to MOSI and CLK to SCK (cf http://arduino.cc/en/Reference/SPI )
int numberOfHorizontalDisplays = 4;
int numberOfVerticalDisplays = 1;

byte button_1 = 5;
byte button_2 = 4;

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// Written by Peter Dalmaris from Tech Explorations.
// Used to find out how long an ESP32 can last on a LiPo battery.
// This sketch will blink the LED at GPIO5 once per second and
// store the number of blinks in an EEPROM location.
// In between blinks, the ESP32 goes to sleep.

#include "EEPROM.h"
#include <DeepSleepScheduler.h>

#ifdef ESP32