cognicity-floodsensor

IoT water depth, temperature and humidity sensor code

Installation

First clone this repository and install dependencies:

git clone https://github.com/smart-facility/cognicity-floodsensor
cd cognicity-floodsensor

Database Schema

Schema is design for PostgreSQL with the PostGIS extension.

Create the schema by running schema/cognicity_floodsensor_pg_schema.sql in target database.

Lambda side

cd lambda
npm install

Copy lambda/sample_config.js to a file called config in the lambda subdirectory, and edit it to replace the sample PostgreSQL config string with your actual string. Then in the lambda subdirectory

npm install
zip -r -9 ../lambda.zip *

and upload the lambda.zip file to AWS lambda.

Device-side

cd device
npm install

Set up a device and associated certificate in AWS IoT (CLI or console) and then copy the private key (as private.pem.key) and certificate (as certificate.pem.crt) under awsCerts/.

Set the configuration options as described in device/config.js

Run this (note it needs to be run as root to access the GPIO memory):

sudo node device.js

Ctrl-C to quit.

Units

All distances are stored as centimetres (cm), temperature in °C, and humidity as %.

Circuit

The circuit schematic we use with this software (included hard-coded pin numbers in set up of DHT and HC-SR04 libraries) is as follows: