Kaa application based on Raspberry Pi and DHT11 sensor

This sample RaspberryPI application collects temperature measurements from DHT11 sensor and uploads it to Cassandra using Kaa.

Kaa is an open-source middleware platform for building, managing, and integrating connected products with the Internet of Everything.

Installation instruction

1. Get Rasberry Pi 2 Model B, DHT 11 sensor and 3 Male-Male jumper wires.

2. Install third-party components for C SDK using this steps.

3. [Raspberry Pi] Install the WiringPi library.

   git clone git://git.drogon.net/wiringPi
   cd wiringPi
   ./build
   

4. [Raspberry Pi] Clone the repository of the Kaa Cassandra sample.

   git clone https://github.com/kaaproject/kaa-cassandra-sample.git
   

5. [Raspberry Pi] Generate the Kaa C SDK based on this log schema and put it to the kaa-cassandra-sample/client/c/libs/kaa directory.

6. Connect wires using following schema.

• Connect DHT11 pin 1 (left) to Raspberry PI pin 7 (GPIO 4)
• Connect DHT11 pin 2 (middle) to Raspberry PI pin 1 (VCC)
• Connect DHT11 pin 3 (right) to Raspberry PI pin 14 (GND)

7. [Raspberry Pi] Build the client demo based on the Kaa C SDK.

cd kaa-cassandra-sample/client/c
./build.sh deploy

8. [Raspberry Pi] Observe console output.

   Data collection demo started
   Going to add 1th log record: { id: 'Sensor 1', region: 'Region 1', model: 'DHT11', val: 25 }
   Going to add 2th log record: { id: 'Sensor 1', region: 'Region 1', model: 'DHT11', val: 25 }
   Going to add 3th log record: { id: 'Sensor 1', region: 'Region 1', model: 'DHT11', val: 25 }
   Going to add 4th log record: { id: 'Sensor 1', region: 'Region 1', model: 'DHT11', val: 25 }
   Going to add 5th log record: { id: 'Sensor 1', region: 'Region 1', model: 'DHT11', val: 25 }