ARDUINO WIFI

Introduction

Using Arduino with WiFi is a great option for connecting your Arduino board wirelessly to the Internet in a few minutes. Connecting a device to a WiFi network is simple, no further configuration in addition to the SSID and the password are required. There are many boards with WiFi connectivity, as it provides an easy setup, without any cable requirement. There are a plenty of alternatives for WiFi connectivity, including shields, devices with on-board WiFi, or external modules that can be connected to the microcontroller.

In this documentation we cover how to connect devices over WiFi by using different approaches, like Arduino Shields, external modules, and devices with embedded WiFi like Arduino Nano 33 IoT, or Arduino MKR WIFI 1010 .

Arduino with WiFi Shield

The following example will allow connecting your Arduino device with the WiFi Shield to the cloud platform in a few lines. Just modify the arduino_secrets.h file with your own information.

#define THINGER_SERIAL_DEBUG
#define THINGER_USE_STATIC_MEMORY
#define THINGER_STATIC_MEMORY_SIZE 512

#include <WiFi.h>
#include <ThingerWifi.h>
#include "arduino_secrets.h"

ThingerWifi thing(USERNAME, DEVICE_ID, DEVICE_CREDENTIAL);

void setup() {
  // open serial for debugging
  Serial.begin(115200);
  
  // configure wifi network
  thing.add_wifi(SSID, SSID_PASSWORD);

  pinMode(2, OUTPUT);

  // pin control example (i.e. turning on/off a light, a relay, etc)
  thing["led"] << digitalPin(2);

  // resource output example (i.e. reading a sensor value, a variable, etc)
  thing["millis"] >> outputValue(millis());

  // more details at http://docs.thinger.io/arduino/
}

void loop() {
  thing.handle();
}

#define USERNAME "your_user_name"
#define DEVICE_ID "your_device_id"
#define DEVICE_CREDENTIAL "your_device_credential"

#define SSID "your_wifi_ssid"
#define SSID_PASSWORD "your_wifi_ssid_password"

Arduino with CC3000

The CC3000 chip from Texas Instruments was one of the first low-cost WiFi chips that revolutionized the IoT maker ecosystem. In contrary to the other available WiFi alternatives, like the WiFi shield, the CC3000 appeared at a low cost (about 10$) for their time. It is a powerful chip as it integrates the whole TCP/IP stack and many other protocols. Some vendors like Adadruit started to build modules and libraries for integrating this chip with the Arduino ecosystem. Thanks to the libraries provided by Adafruit is then possible to build connected device with a few lines of code.

So for this module is required to have installed the Adafruit CC3000 Libraries, as they are directly used by the thinger client. You can install it directly from the Arduino Library Manager by searching cc3000.

The following example will allow connecting your Arduino device with the CC3000 module to the cloud platform in a few lines. Just modify the arduino_secrets.h file with your own information.

#define THINGER_SERIAL_DEBUG

#include <ThingerCC3000.h>
#include "arduino_secrets.h"

ThingerCC3000 thing(USERNAME, DEVICE_ID, DEVICE_CREDENTIAL);

void setup() {
  // open serial for debugging
  Serial.begin(115200);

  // configure wifi network
  thing.add_wifi(SSID, SSID_PASSWORD);

  pinMode(2, OUTPUT);

  // pin control example (i.e. turning on/off a light, a relay, etc)
  thing["led"] << digitalPin(2);

  // resource output example (i.e. reading a sensor value, a variable, etc)
  thing["millis"] >> outputValue(millis());

  // more details at http://docs.thinger.io/arduino/
}

void loop() {
  thing.handle();
}

#define USERNAME "your_user_name"
#define DEVICE_ID "your_device_id"
#define DEVICE_CREDENTIAL "your_device_credential"

#define SSID "your_wifi_ssid"
#define SSID_PASSWORD "your_wifi_ssid_password"

Arduino Yun

The Arduino Yún is a microcontroller board based on the ATmega32u4 and the Atheros AR9331. The Atheros processor supports a Linux distribution based on OpenWrt named OpenWrt-Yun. The board has built-in Ethernet and WiFi support, a USB-A port, micro-SD card slot, 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connection, an ICSP header, and 3 reset buttons. This board let the programmable ATmega32u4 communicate with Internet by using the Bridge Library that expose some functions running in the Linux distribution.

The following example will allow connecting an Arduino Yun to the cloud platform in a few lines using the WiFi interface. Just modify the arduino_secrets.h file with your own information. Notice that it is not required to configure any network parameter in the code, as this managed by the running Linux distribution. However you many need to connect with your Arduino Yun via WiFi to connect it some local network.

#include <ThingerYun.h>
#include "arduino_secrets.h"

ThingerYun thing(USERNAME, DEVICE_ID, DEVICE_CREDENTIAL);

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);

  // initialize bridge
  Bridge.begin();

  // pin control example (i.e. turning on/off a light, a relay, etc)
  thing["led"] << digitalPin(LED_BUILTIN);

  // resource output example (i.e. reading a sensor value, a variable, etc)

  // more details at http://docs.thinger.io/arduino/
}

void loop() {
  thing.handle();
}

#define USERNAME "your_user_name"
#define DEVICE_ID "your_device_id"
#define DEVICE_CREDENTIAL "your_device_credential"

For using Arduino Yun, the device must be connected to a network with Internet, just with Ethernet or a Wifi connection. It can be configured in the Arduino Yun web configuration.

Arduino MKR1000

The Arduino MKR1000 is a microcontroller based on the Atmel ATSAMW25 SoC (System on Chip), that is part of the SmartConnect family of Atmel Wireless devices, specifically designed for IoT projects and devices. A good 32 bit computational power similar to the Zero board, the usual rich set of I/O interfaces, low power WiFi with a Cryptochip for secure communication, and the ease of use of the Arduino Software (IDE) for code development and programming. All these features make this board the preferred choice for the emerging IoT battery-powered projects in a compact form factor.

The following example will allow connecting the MKR1000 device to the cloud platform in a few lines using the WiFi interface. Just modify the arduino_secrets.h file with your own information.

#define THINGER_SERIAL_DEBUG

#include <ThingerWifi101.h>
#include "arduino_secrets.h"

// cannot connect? Update WiFi101 firmware and add iot.thinger.io SSL Certificate
// https://support.arduino.cc/hc/en-us/articles/360016119219

ThingerWifi101 thing(USERNAME, DEVICE_ID, DEVICE_CREDENTIAL);

void setup() {
  // open serial for debugging
  Serial.begin(115200);

  // configure wifi network
  thing.add_wifi(SSID, SSID_PASSWORD);

  pinMode(LED_BUILTIN, OUTPUT);