This document is deprecated, Please do not follow.
The demo can be used to Monitor critical parameters which decide the health of the crops, Display the data on a Dashboard using Grafana.
What will you need?
- Raspberry Pi 3/4 (or any variant of these)
- mcro-SD card and micro-SD card Reader/Adapter.
- Temperature, Pressure sensor - BME280
- Soil Moisture sensor
- Analog to Digital Converter - PCF8591 module
- OLED Display (128x64) (optional)
- Female to Female Du-point cables
- Laptop or Server Installed with Influxdb and Grafana
Make your own Farm datalogger following these steps.
- Install Shunya OS
- Connect Hardware
Step 1: Install Shunya OS
Shunya Interfaces is built on top of Shunya OS and comes pre-installed with Shunya Interfaces. Shunya OS is an linux-based OS that runs on your hardware, it light-weight and configurable.
Etcher allows you to Flash Shunya OS on the micro-SD card.
Flash Shunya OS
- Download Shunya OS
- Right click on the downloaded zip file.
- Click Extract here.
- Open Etcher.
- Click Select Image.
- You will find the Shunya OS
.imgfile in the folder that we had extracted earlier.
- Insert SD card.
- Click on Flash.
This will load the micro-SD card with Shunya OS.
Booting Up with Shunya OS
- Insert the micro-SD card into the board.
- Connect peripherals like Keyboard, Mouse and HDMI monitor.
- Connect Power Supply.
The board should boot up with Shunya OS.
Login to Shunya
Login with these credentials:
- Username : shunya
- Password : shunya
Step 2: Connect Hardware
Now its time to put all the hardware together, use the diagram below to connect hardware.
Step 3: Configure and Run
Tell Shunya Interfaces your hardware connections.
You can configure by running command.
$ sudo vi /etc/shunya/interfaces/config.yaml
Sensor ID's and Connection ID's
You tell all your Hardware connections to Shunya Interfaces via Sensor ID's and Connection ID's.
Each Sensor is given a special ID which the Shunya Interfaces library recognizes. And each Hardware pin on the Sensor is given a Connection ID.
So when we write
pin 1: 1.1 Shunya Interfaces understands it as
<Sensor 1>.<Sensor pin 1> connected to
pin 1 of Raspberry Pi.
In our case, we have connected 2 devices to the Raspberry Pi (BME280 and PCF8591) to pin 3 (SDA) & pin 5 (SCL) respectively.
Our Config file will look like.
pin 3: [1.1, 6.1]
pin 4: null
pin 5: [1.2, 6.2]
Make sure to save your changes to the config file.
Compiling code is same as compiling C program. Just link the libraries.
While running the code use
sudo to give appropriate permissions to your app.
$ sudo iotfarm
Now your IoT device is ready and publishing data to the server.