Embedded Computing
  • About
  • Blog
  • Hardware
    • Which Platform?
    • Controller Platforms >
      • Adafruit Platform
      • Arduino Plaform
      • BBC micro:bit
      • Espressif Platform
      • LaunchPad Plaform
      • Microsoft Azure IoT DevKit
      • Seeeduino Platform
      • Teensy Plaform
    • Computer Platforms >
      • BeagleBone Platform
      • Mediatek Platform
      • UDOO Platform
    • Legacy Platforms >
      • chipKIT Plaform >
        • chipKIT Uno32 and uC32
        • chipKIT WF32 and WiFire
        • Compatibility
        • chipKIT PGM Programmer-Debugger
        • 4D Systems PICadillo-35T
        • Shields for chipKIT Uno32
        • 4D Systems Platform >
          • 4D Systems PICadillo-35T
          • 4D Systems gen4-IoD-28T
      • Cosa, an Alternative Framework for AVR Boards
      • DFRobot Platform >
        • DFRobot BLuno
        • DFRobot Wido
      • Digistump Platform >
        • Digispark
        • Oak
      • Intel Platform >
        • Intel Curie with Neural Network
        • Intel Edison
      • LightBlue Bean
      • Little Robot Friends
      • Maple Plaform >
        • LeafLabs Maple
      • Microduino Plaform >
        • Microduino
      • Particle Platform >
        • Particle Core
        • Particle Photon
        • Particle Tools
      • Protostack Platform >
        • Protostack Boards
      • RedBear Platform >
        • RedBearLab CC3200
        • RedBearLab WiFi Mini
        • RedBear Duo
      • Wiring Plaform >
        • Wiring S
        • Wiring Play Shield
    • Boards and Plugs
    • I²C Logic Level Converter
    • Peripherals >
      • BoosterPacks for LaunchPads
      • Shields
      • Grove System
      • Ten Years with the Grove System
      • Sensors
      • Actuators
    • Displays >
      • Pervasive Displays e-Paper Screens
      • FRAM-based E-Paper Screen Controller
      • The 2.8" HY28A LCD Screen
      • High-Definition 480x320 3.5" Screen With Touch and Fonts
      • Kentec 3.5" LCD SPI with Touch BoosterPack
      • 4D Systems Intelligent Screens
      • East Rising 5" LCD with RA8875, Touch, Fonts, Flash and SD-card
      • East Rising 5" LCD with SSD1963, Touch, Flash and SD-card
  • Software
    • The IDE Question >
      • The Battle of IDEs
      • More IDE Options
      • Looking for a Better IDE
      • Assessing the Next Generation of IDEs
    • Exploring RTOS with Galaxia >
      • Event Library
      • Semaphore Library
      • Mailbox Library
      • Timer Library
      • Clock Library
      • SWI Library
      • Task Library
    • Ultra-Low Power with EnergyTrace >
      • Ultra-Low Power with MSP430
      • Ultra-Low Power with Energia MT and Galaxia
    • Using Integers Instead of Reals
  • IoT
    • IoT Platforms: Which Hardware?
    • IoT Services: Which Solution? >
      • Recommended IoT Solutions
      • Platform-Specific IoT Solutions
      • Other IoT Solutions
      • Not tested IoT Solutions
      • Notification Solutions
    • Get Date and Time from Internet with NTP
    • Fast and Easy WiFi Connection with QR-Code
  • Tools
    • How to Start?
    • Reference >
      • Asking for Help
      • LaunchPad and BoosterPack Boards Pins Maps
      • Ruler
      • Standards for Connectors
    • Training >
      • Texas Instruments Workshops
      • Embedded Systems: Shape The World — MOOC edX UTAustinX UT.6.02x
      • Embedded Systems - Shape The World: Microcontroller Input/Output — MOOC edX UTAustinX UT.6.10x
      • Embedded Systems - Shape The World: Multi-Threaded Interfacing — MOOC edX UTAustinX UT.6.20x
      • Real-Time Bluetooth Networks: Shape the World — MOOC edX UTAustinX UT.RTBN.12.01x
      • Systems Thinking with Texas Instruments Robotics System Learning Kit
    • Books >
      • Getting Started with the MSP430 LaunchPad
      • Getting Started with Arduino
      • Arduino Cookbook
    • IDEs >
      • Texas Instruments Code Composer Studio 6
      • Texas Instruments Code Composer Studio Cloud
      • Energia
      • Tools for Documentation
    • Equipment >
      • Saleae Logic Analyser
      • Rigol DS1102E Oscilloscope
      • XDS110 Debug Probe with EnergyTrace​
      • Segger J-Link Programmer-Debugger
  • Projects
    • Libraries >
      • Master I²C Software Library
      • Date and Time Library
      • highView Library Suite
      • LCD_screen Library Suite
      • Others Libraries
    • smartDevices >
      • I²C smartColours Smart Sensor
      • I²C smartRFID Smart Sensor
      • I²C smartLED Display
      • I²C smartControls Smart Device
      • I²C smartWiFi Smart Device
      • I²C smartBLE Smart Device
      • I²C smartNode Smart Device
    • IoT Projects >
      • Remote e-Paper Messages Panel
      • Industrial IoT Project
      • Remote Contactless Temperature Monitor
      • Using Node-RED for IIoT
      • Low Power Home Network Weather Monitoring
      • Updated Low Power Home Network Weather Monitoring
      • Weather and Security Station with Blynk
      • SensorTag to Blynk Using Node-RED
      • Pervasive Reporting
    • AI Projects >
      • Colour Recognition with Neural Network
    • Other Projects >
      • Portable Particulate​ Matter Monitor
      • FRAM-based E-Paper Screen Controller
      • General Purpose 3.5" Screen
      • Colour Recognition with Neural Network
      • A Low Power Weather Station
      • Digital Volt-Amp-Watt Meter
      • Mobile Measurement with LCD Display
      • Screen with SRAM for GUI
      • Volt-Amp-Watt-Meter for Grove
      • Multi-Touch Project with CapTIvate

Fast and Easy WiFi Connection with QR-Code

How to connect a web browser to a server easily and quickly?

Let's consider a weather station measuring temperature and humidity. The weather station is connected to a WiFi network and acts as a server. 

One option would consist on setting the CC3200 in access point (AP) mode. However, this requires that the clients select the specific WiFi network provided by the CC3200. Using the local WiFi network seems easier and faster.

For this project, I'm using a LaunchPad CC3200, a Grove BoosterPack with the DHT22 temperature and humidity sensor and the Sharp Memory Display BoosterPack. 
Picture

Getting the IP Address 

The server connects to the access point and receives an IP address. 

The server then converts the IP address into a QR-code and displays it on the screen.

The Sharp Memory Display provides a high resolution with an excellent contrast. Each dot is perfectly shaped. I've tried with standard LCD TFT displays, but resolution isn't good enough.

Picture

Connecting a Client

There are two requisites:
  • A QR reader app has been installed on the smartphone previously. 
  • Both the smartphone and the weather station are connected to the same WiFi network.
Now,
  • Launch the QR reader application and focus on the QR code. 
  • The QR reader application reads the IP address and launches a web browser! 
Picture
Picture
Picture

Software

The project was developed with embedXcode and reuses four main components from other projects.
  • The project is based on the Simple Web Server WiFi example provided by Energia for the CC3200.
  • One library QR-Code-Generator generates the QR-code.
  • Another library LCD Sharp BoosterPack SPI provided with Energia manages the display.
  • A final library reads data from the DHT22 and make the conversion into temperature and humidity.

Links

  • LaunchPad CC3200
  • Grove BoosterPack
  • Sharp Memory Display BoosterPack
Powered by Create your own unique website with customizable templates.