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
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Get Rasberry Pi 2 Model B, DHT 11 sensor and 3 Male-Male jumper wires.
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Install third-party components for C SDK using this steps.
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[Raspberry Pi] Install the WiringPi library.
git clone git://git.drogon.net/wiringPi cd wiringPi ./build -
[Raspberry Pi] Clone the repository of the Kaa Cassandra sample.
git clone https://github.com/kaaproject/kaa-cassandra-sample.git -
[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.
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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
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[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 }