ADXL345 Accel example I2C

/*  ********************************************* 
 *  SparkFun_ADXL345_Example
 *  Triple Axis Accelerometer Breakout - ADXL345 
 *  Hook Up Guide Example 
 *  
 *  Utilizing Sparkfun's ADXL345 Library
 *  Bildr ADXL345 source file modified to support 
 *  both I2C and SPI Communication
 *  
 *  E.Robert @ SparkFun Electronics
 *  *********************************************/

ADXL345 Accel example SPI

/*  ********************************************* 
 *  SparkFun_ADXL345_Example
 *  Triple Axis Accelerometer Breakout - ADXL345 
 *  Hook Up Guide Example 
 *  
 *  Utilizing Sparkfun's ADXL345 Library
 *  Bildr ADXL345 source file modified to support 
 *  both I2C and SPI Communication
 *  
 *  E.Robert @ SparkFun Electronics
 *  *********************************************/

Analog input, analog output, serial output

  Reads an analog input pin, maps the result to a range from 0 to 255 and uses
  the result to set the pulse width modulation (PWM) of an output pin.
  Also prints the results to the Serial Monitor.

  The circuit:
  - potentiometer connected to analog pin 0.
    Center pin of the potentiometer goes to the analog pin.
    side pins of the potentiometer go to +5V and ground
  - LED connected from digital pin 9 to ground

  created 29 Dec. 2008
  modified 9 Apr 2012
  by Tom Igoe

  This example code is in the public domain.

  http://www.arduino.cc/en/Tutorial/AnalogInOutSerial

BMP180 Pressure sensor

  This is an example for the BMP085 Barometric Pressure & Temp Sensor
  Designed specifically to work with the Adafruit BMP085 Breakout 
  ----> https://www.adafruit.com/products/391
  These pressure and temperature sensors use I2C to communicate, 2 pins
  are required to interface
  Adafruit invests time and resources providing this open source code, 
  please support Adafruit and open-source hardware by purchasing 
  products from Adafruit!
  Written by Limor Fried/Ladyada for Adafruit Industries.  
  BSD license, all text above must be included in any redistribution

BMP280 Pressure sensor

  This is a library for the BMP280 humidity, temperature & pressure sensor
  Designed specifically to work with the Adafruit BMP280 Breakout
  ----> http://www.adafruit.com/products/2651
  These sensors use I2C or SPI to communicate, 2 or 4 pins are required
  to interface.
  Adafruit invests time and resources providing this open source code,
  please support Adafruit andopen-source hardware by purchasing products
  from Adafruit!
  Written by Limor Fried & Kevin Townsend for Adafruit Industries.
  BSD license, all text above must be included in any redistribution

SD card test

  This example shows how use the utility libraries on which the'
  SD library is based in order to get info about your SD card.
  Very useful for testing a card when you're not sure whether its working or not.

  The circuit:
    SD card attached to SPI bus as follows:
 ** MOSI - pin 11 on Arduino Uno/Duemilanove/Diecimila
 ** MISO - pin 12 on Arduino Uno/Duemilanove/Diecimila
 ** CLK - pin 13 on Arduino Uno/Duemilanove/Diecimila
 ** CS - depends on your SD card shield or module.
 		Pin 4 used here for consistency with other Arduino examples


  created  28 Mar 2011
  by Limor Fried
  modified 9 Apr 2012
  by Tom Igoe

DHT11 humidity and temperature sensor

// Example testing sketch for various DHT humidity/temperature sensors
// Written by ladyada, public domain
//
// REQUIRES the following Arduino libraries:
// - DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library
// - Adafruit Unified Sensor Lib: https://github.com/adafruit/Adafruit_Sensor

DHT22 humidity and temperature sensor

// Example testing sketch for various DHT humidity/temperature sensors
// Written by ladyada, public domain
//
// REQUIRES the following Arduino libraries:
// - DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library
// - Adafruit Unified Sensor Lib: https://github.com/adafruit/Adafruit_Sensor

DS18S20 Temperature sensor

// OneWire DS18S20, DS18B20, DS1822 Temperature Example
//
// http://www.pjrc.com/teensy/td_libs_OneWire.html
//
// The DallasTemperature library can do all this work for you!
// https://github.com/milesburton/Arduino-Temperature-Control-Library

Encoder Library - Basic Example

/* Encoder Library - Basic Example
 * http://www.pjrc.com/teensy/td_libs_Encoder.html
 *
 * This example code is in the public domain.
 */

Firmata Library - Standard Firmata Ethernet

  StandardFirmataEthernet is a TCP client/server implementation. You will need a Firmata client library
  with a network transport that can act as a TCP server or client in order to establish a connection between
  StandardFirmataEthernet and the Firmata client application.
  To use StandardFirmataEthernet you will need to have one of the following
  boards or shields:
  - Arduino Ethernet shield (or clone)
  - Arduino Ethernet board (or clone)
  - Arduino Yun
  Follow the instructions in the ethernetConfig.h file (ethernetConfig.h tab in Arduino IDE) to
  configure your particular hardware.
  NOTE: If you are using an Arduino Ethernet shield you cannot use the following pins on
  the following boards. Firmata will ignore any requests to use these pins:
  - Arduino Uno or other ATMega328 boards: (D4, D10, D11, D12, D13)
  - Arduino Mega: (D4, D10, D50, D51, D52, D53)
  - Arduino Leonardo: (D4, D10)
  - Arduino Due: (D4, D10)
  - Arduino Zero: (D4, D10)
  If you are using an ArduinoEthernet board, the following pins cannot be used (same as Uno):
  - D4, D10, D11, D12, D13

library rc-switch example: ReceiveDemo Simple

/*
  Simple example for receiving
  
  https://github.com/sui77/rc-switch/
*/

Sd Formatter

/*
 * This program will format SD/SDHC/SDXC cards.
 * Warning all data will be deleted!
 *
 * This program attempts to match the format
 * generated by SDFormatter available here:
 *
 * http://www.sdcard.org/consumers/formatter/
 *
 * For very small cards this program uses FAT16
 * and the above SDFormatter uses FAT12.
 */

Stepper Motor Control - one revolution

 This program drives a unipolar or bipolar stepper motor.
 The motor is attached to digital pins 8 - 11 of the Arduino.

 The motor should revolve one revolution in one direction, then
 one revolution in the other direction.


 Created 11 Mar. 2007
 Modified 30 Nov. 2009
 by Tom Igoe

library Ethernet example: UdpNtpClient

 Udp NTP Client
 Get the time from a Network Time Protocol (NTP) time server
 Demonstrates use of UDP sendPacket and ReceivePacket
 For more on NTP time servers and the messages needed to communicate with them,
 see http://en.wikipedia.org/wiki/Network_Time_Protocol
 created 4 Sep 2010
 by Michael Margolis
 modified 9 Apr 2012
 by Tom Igoe
 modified 02 Sept 2015
 by Arturo Guadalupi
 This code is in the public domain.

library Ethernet example: WebClientRepeating

  Repeating Web client
 This sketch connects to a a web server and makes a request
 using a Wiznet Ethernet shield. You can use the Arduino Ethernet shield, or
 the Adafruit Ethernet shield, either one will work, as long as it's got
 a Wiznet Ethernet module on board.
 This example uses DNS, by assigning the Ethernet client with a MAC address,
 IP address, and DNS address.
 Circuit:
 * Ethernet shield attached to pins 10, 11, 12, 13
 created 19 Apr 2012
 by Tom Igoe
 modified 21 Jan 2014
 by Federico Vanzati
 http://www.arduino.cc/en/Tutorial/WebClientRepeating
 This code is in the public domain.

library Ethernet example: WebServer

  Web Server
 A simple web server that shows the value of the analog input pins.
 using an Arduino Wiznet Ethernet shield.
 Circuit:
 * Ethernet shield attached to pins 10, 11, 12, 13
 * Analog inputs attached to pins A0 through A5 (optional)
 created 18 Dec 2009
 by David A. Mellis
 modified 9 Apr 2012
 by Tom Igoe
 modified 02 Sept 2015
 by Arturo Guadalupi

DS1621 I2C

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

Cooler controller for aquarium with meteorological measurement.

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

Espressif ESP-NOW Example

/* 
   This example shows how to use ESPNOW.
   Prepare two device, one for sending ESPNOW data and another for receiving
   ESPNOW data.
*/

Espressif ESP32-C3 Blink Example

/* Blink Example
   This example code is in the Public Domain (or CC0 licensed, at your option.)
   Unless required by applicable law or agreed to in writing, this
   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
   CONDITIONS OF ANY KIND, either express or implied.
*/

WiFi Web Server LED Blink

 A simple web server that lets you blink an LED via the web.
 This sketch will print the IP address of your WiFi Shield (once connected)
 to the Serial monitor. From there, you can open that address in a web browser
 to turn on and off the LED on pin 5.

 If the IP address of your shield is yourAddress:
 http://yourAddress/H turns the LED on
 http://yourAddress/L turns it off

 This example is written for a network using WPA encryption. For
 WEP or WPA, change the Wifi.begin() call accordingly.

 Circuit:
 * WiFi shield attached
 * LED attached to pin 5

 created for arduino 25 Nov 2012
 by Tom Igoe

ported for sparkfun esp32 
31.01.2017 by Jan Hendrik Berlin

ESP32 ADC with Arduino IDE

Measuring voltage example

BMP280 Pressure sensor

  This is a library for the BMP280 humidity, temperature & pressure sensor
  Designed specifically to work with the Adafruit BMP280 Breakout
  ----> http://www.adafruit.com/products/2651
  These sensors use I2C or SPI to communicate, 2 or 4 pins are required
  to interface.
  Adafruit invests time and resources providing this open source code,
  please support Adafruit andopen-source hardware by purchasing products
  from Adafruit!
  Written by Limor Fried & Kevin Townsend for Adafruit Industries.
  BSD license, all text above must be included in any redistribution

Espressif ESP-NOW Example

/* 
   This example shows how to use ESPNOW.
   Prepare two device, one for sending ESPNOW data and another for receiving
   ESPNOW data.
*/

Espressif ESP32 Blink Example

/* Blink Example
   This example code is in the Public Domain (or CC0 licensed, at your option.)
   Unless required by applicable law or agreed to in writing, this
   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
   CONDITIONS OF ANY KIND, either express or implied.
*/

ESP32 Micropython

import machine
import time
led = machine.Pin(2, machine.Pin.OUT)
while True:
	led.value(1)
	time.sleep(1)
	led.value(0)
	time.sleep(1)

Blink LED no ESP32 com o RTOS NuttX

Exemplo simples de como piscar um LED utilizando o RTOS Nuttx no ESP32 escrito por Sara Monteiro.

Antes de utilizar esse exemplo é necessário configurar um emulador de porta serial como descrito na documentação.

Conecte um terminal serial, acesse o NSH (NuttShell) e digite o comando "leds" para iniciar. 



Artigo Original no site Embarcados

WiFi Web Server LED Blink

 A simple web server that lets you blink an LED via the web.
 This sketch will print the IP address of your WiFi Shield (once connected)
 to the Serial monitor. From there, you can open that address in a web browser
 to turn on and off the LED on pin 5.

 If the IP address of your shield is yourAddress:
 http://yourAddress/H turns the LED on
 http://yourAddress/L turns it off

 This example is written for a network using WPA encryption. For
 WEP or WPA, change the Wifi.begin() call accordingly.

 Circuit:
 * WiFi shield attached
 * LED attached to pin 5

 created for arduino 25 Nov 2012
 by Tom Igoe

ported for sparkfun esp32 
31.01.2017 by Jan Hendrik Berlin

Blink LED no ESP32 e Zephyr RTOS

Exemplo simples de como piscar um LED utilizando o RTOS Zephyr no ESP32 escrito por Glauber Ferreira.



Artigo Original no site Embarcados

Example Tiny85 Temp LCD RTC of TinyWireM library

ATtiny85 as an I2C Master   Ex3        BroHogan                         1/22/11
I2C master reading DS1621 temperature sensor & DS1307 RTC. Display to I2C GPIO LED.
SETUP:
ATtiny Pin 1 = (RESET) N/U                      ATtiny Pin 2 = (D3) N/U
ATtiny Pin 3 = (D4) to LED1                     ATtiny Pin 4 = GND
ATtiny Pin 5 = SDA on all devices               ATtiny Pin 6 = (D1) to LED2
ATtiny Pin 7 = SCK on all devices               ATtiny Pin 8 = VCC (2.7-5.5V)
NOTE! - It's very important to use pullups on the SDA & SCL lines!
DS1621 wired per data sheet. This ex assumes A0-A2 are set LOW for an addeess of 0x48
DS1307 wired per data sheet. This ex assumes A0-A2 are set LOW for an addeess of 0x68
PCA8574A GPIO was used wired per instructions in "info" folder in the LiquidCrystal_I2C lib.
This ex assumes A0-A2 are set HIGH for an addeess of 0x3F
LiquidCrystal_I2C lib was modified for ATtiny - on Playground with TinyWireM lib.
TinyWireM USAGE & CREDITS: - see TinyWireM.h

Simple example for testing board features.

1- Tests LCD display;
2- Test the red LEDs connected to the PORTA.
3- Tests matrix keyboard
4- External eeprom test 24LC512
5- Test RTC PCF8563
6- Test serial port sending
7- Tests receiving serial port
8- Read keyboard and send through serial port

Simple example for testing board features.

1- Tests LCD display;
2- Test the red LEDs connected to the PORTA.
3- Tests matrix keyboard
4- External eeprom test 24LC512
5- Test RTC PCF8563
6- Test serial port sending
7- Tests receiving serial port
8- Read keyboard and send through serial port

Simple example for testing board features.

1- Tests LCD display;
2- Tests 7-segment displays;
2- Test the red LEDs;
3- Tests push buttons;
4- Tests internal eeprom;
5- Tests external eeprom 24C04;
6- Test serial sending and receiving data;
7- Tests AD converter connected to the potentiometer;
8- Tests temperature measurement;
9- Turn on the Heater;
10- Turn on the fan and measure the speed.

CONECTANDO O PIC - RECURSOS AVANÇADOS

;  ESTE EXEMPLO FOI ELABORADO PARA EXPLICAR O FUNCIONAMENTO DA USART DO PIC.
;  O SOFTWARE CONVERTE O CANAL 1 DO CONVERSOR A/D (POTENCIÔMETRO P2) E MOSTRA
;  NO DISPLAY O VALOR CONVERTIDO EM DECIMAL E HAXADECIMAL.
;  ALÉM DE MOSTRAR O VALOR NO DISPLAY, O SOFTWARE TRANSMITE PELA USART O VALOR
;  DA CONVERSÃO. OS VALORES RECEBIDOS PELA USART TAMBÉM SÃO MOSTRADOS NO LCD
;  COMO CARACTERES ASCII.

Demo_Mclab2_16F877A

Programa de teste da placa Mclab2 (somente arquivo binário .hex)

1- Testa display LCD;
2- Testa displays de 7 segmentos;
2- Testa os LEDs vermelhos;
3- Testa botões de pressão;
4- Testa eeprom interna;
5- Testa eeprom externa 24C04;
6- Testa porta serial envio;
7- Testa porta serial recebimento;
8- Testa conversor AD ligado ao potênciometro; 
9- Testa medição de temperatura;
10- Liga Aquecedor;
11 -Liga ventilador e mede a velocidade.

Simple example for testing board features.

1- Tests LCD display;
2- Tests 7-segment displays;
2- Test the red LEDs;
3- Tests push buttons;
4- Tests internal eeprom;
5- Tests external eeprom 24C04;
6- Test serial sending and receiving data;
7- Tests AD converter connected to the potentiometer;
8- Tests temperature measurement;
9- Turn on the Heater;
10- Turn on the fan and measure the speed.

Simple example for testing board features.

1- Tests LCD display;
2- Tests 7-segment displays;
2- Test the red LEDs;
3- Tests push buttons;
4- Tests internal eeprom;
5- Tests external eeprom 24C04;
6- Test serial sending and receiving data;
7- Tests AD converter connected to the potentiometer;
8- Tests temperature measurement;
9- Turn on the Heater;
10- Turn on the fan and measure the speed.

Simple example for testing board features.

1- Tests LCD display;
2- Tests 7-segment displays;
2- Test the red LEDs;
3- Tests push buttons;
4- Tests internal eeprom;
5- Tests external eeprom 24C04;
6- Test serial sending and receiving data;
7- Tests AD converter connected to the potentiometer;
8- Tests temperature measurement;
9- Turn on the Heater;
10- Turn on the fan and measure the speed.

Simple example for testing board features.

1- Tests LCD display;
2- Tests 7-segment displays;
2- Test the red LEDs;
3- Tests push buttons;
4- Tests internal eeprom;
5- Tests external eeprom 24C04;
6- Test serial sending and receiving data;
7- Tests AD converter connected to the potentiometer;
8- Tests temperature measurement;
9- Turn on the Heater;
10- Turn on the fan and measure the speed.

Simple example for testing board features.

1- Tests LCD display;
2- Tests 7-segment displays;
2- Test the red LEDs;
3- Tests push buttons;
4- Tests internal eeprom;
5- Tests external eeprom 24C04;
6- Test serial sending and receiving data;
7- Tests AD converter connected to the potentiometer;
8- Tests temperature measurement;
9- Turn on the Heater;
10- Turn on the fan and measure the speed.

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

Serial/LCD simple test.

Open the serial term and type lines with LF terminator.

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

Example for testing all board features.

1- Potentiometer value is shown in 7 segment display;
2- LCD prints seconds value from main code counter and the DS1307;
3- Swiches values are printed on LCD when Pressed;
4- Switch 'S' turn on buzzer via PWM;
6- RGB led is flashin (pins are multiplexed with other componentes);
7- Serial port in Ecco mode (send what ir receive);

Simple board X example