iot-control-diploma

In this repository you will find an example IoT control service that will let you control relative humidity level via ESP8266 module and ultrasonic humidifier.

Prerequisites:

• AWS account (free tier will do just fine)
• ESP8266 microcontroller NodeMCU v3
• Ultrasonic humidifier UKC YX025S (KPY-25S)
• DHT11 humidity/temperature sensor
• Wirings, relays etc.

How this will work (the high level diagram):

Set-up instructions:

Disclaimer: this is not a step-by-step instruction, I assume you're familiar with most of the things.

1. Configure AWS credentials

   • Given you already have AWS account, you now have to configure credentials on the machine that you will use for serverless deploy command
   • See this page for details -> https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-configure.html

2. Prepare Lambda deployment archive

   • Now you need to build, publish and package this project so that the Lambda funciton can be deployed
   • You'll have to execute dotnet publish -c Release command
   • Then zip everything you find in publish folder, see serverless configuration file for expected artifact path

3. Deploy AWS infrastructure

   • Navigate to serverless folder
   • Execute npm install so that you have required node modules installed
   • If everything went well, you should now have a fresh CloudFormation stack deployed & API Gateway endpoint available

4. Compose the hardware

   • You have to connect the DHT11 sensor to the controller
   • And the controller itself to the humidifier
   • See schemes at this folder

5. Configure controller firmware

   • Open controller firmware file in the editor
   • Set the values for NETWORK_NAME & NETWORK_PASS so that the controller can connect to the internet trough the WiFi
   • Set the values for HUMIDITY_UPDATED_ENDPOINT & AWS_FINGERPRINT so that controller know where to send metrics to
   • Compile and flash the firwmare to controller
   • Turn on the controller, set desired_humidity_level in DynamoDB table, and have fun!