PROJECT INFO

Difficulty: Advanced
Estimated time: 2 hours
License:GPL3+

THINGS USED IN THE PROJECT

Hardware components:

NodeMCU ESP8266 Breakout Board x1
DHT11 Temperature & Humidity Sensor x1
LED (generic) x1
Resistor 221 ohm
Android Phone x1
Breadboard x1

Software apps and online services:

Arduino IDE
IoTIgnite Service Registration
IoTIgnite Agent APP
IoTIgnite Service APP

Hand tools and fabrication machines:

Soldering iron (generic)

STORY

Basically, the Project will transfer data with DHT11 over wireless through NodeMCU. This transfer will be done by using an Raspberry PI3 device as a gateway, and light a led by a rule we set.

NodeMCU will be WiFi Accsess Point; start transmitting your IP and port number to network.
Save device to system on AP mode, and establish wireless connection.
Once the client connection is set; read the frequency of temperature and humidity transmission, and start transmitting the data to client in this frequency.
Re-connect to network if connection is lost, end client connection and wait for the re-connection.
Execute when LED event happened.

1 Getting Ready forRaspberry PI3 As IoT Gateway

Download and install IoT-Ignite Agent App from this link,
Register and login free developer account at https://devzone.iot-ignite.com/dpanel/login.php?page=development ,
Create a service and choose a service name and click next,
Setup and install Raspberry Pi 3 using a micro SD card that contains the latest IoTAgent

2 Prepare NodeMCU for Gateway Registration

Step 1: Components Connect the DHT11, Resistor and the LED

Connect the pins as shown below for device’s physical connection (this connection is configured for the provided sample codes):

The set is physically ready. Now follow the steps to make the set ready for computer installation of the necessary software.

Step 2: Getting Ready for NodeMCU

Go to File/Preferences and add additional esp8266 library from the link below to introduce Arduino IDE with NodeMCU to make it programmable.

http://arduino.esp8266.com/versions/2.3.0/package_esp8266com_index.json

Go to Tool menu and enter esp8266 on board manager screen and click install to finish installation.

Step 3: Installing File System and Libraries

Getting ready for installing NodeMCU file system. Download filesystem uploader plugin here for this https://github.com/esp8266/arduino-esp8266fs-plugin/releases/tag/0.2.0, and extract under Arduino IDE as C:\Program Files (x86)\Arduino\tools\ESP8266FS\tool

Re-start Arduino IDE and make it ready by data upload under Tools menu.

Here we will install the libraries to be used for the application.

For timer library; download from https://github.com/JChristensen/Timer, and add the file to IDE by “sketch include library, add zip library”.

Install other general libraries such as ESP8266WiFi, ESP8266mDNS, WiFiUdp, FS ve DHT as well (Sketch > Include Library > Manage Library).

Add the program code to Arduino and make sure about the computer port we connect the NodeMCU.

Step 4: Generate, Compile, and Upload Code

Copy the library in files within the Github library to extract in Ardunio IDE, i.e: C:\Users\{name}\Documents\Arduino\DynamicNodeRegistrationNodeMCU-IotIgnite

Make sure the data files are under C:\Users\{name}\Documents\Arduino\DynamicNodeRegistrationNodeMCU-IotIgnite\data , and double click file to open.

Now the set is ready with NodeMCU after uploading is done.

NodeMCU must be acces point when your upload complete. Now we can register NodeMCU to Gateway with our open source sample application as called Service Privoder Application.

3 Service Provider Application

Service provider application(SPA) is a template application (open source) for developers mass deployment process. You can use one distribution for all of customer.

Install Service Provider Application: https://download.iot-ignite.com/ServicePlatformApp/
Login with your devzone credentials on your service provide application.

Step 1: Gateway Registration

Click add gateway and type your wireless information for connecting,
Wait a minute for setup process.

Step 2: Register NodeMCU for Gateway

Go home page, list your Gateways and click Thing List and Add Node Manually button.
Type your wireless information for connecting to NodeMCU.

SPA connect your NodeMCU, provides wireless and gateway information to NodeMCU. Install the user application that will transmit the data received from DHT 11 (NodeMCU) sensor to IoT-Ignite platform.