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We ran a very successful Liota and Wavefront lab at VMworld US hooking up LIOTA IOT framework to Wavefront at the {Code} labs. This allowed you to build an IOT device and stream data to a cloud-based metrics and analytics system, Wavefront.

Below are the instructions for the lab.

Connect to Raspberry PI

Connect using putty (ssh port 22)

Find IP address on the label next to your PI

User ID: pi, Password: vmware123

Uninstall Pulse Agent and Liota if it exists

This step copies the necessary files and starts installation process.

Type:sudo su – root to give root privileges on the Raspberry Pi
type: ls /opt/ice-client
If the directory exists do the following:
type: cd /opt/ice-client
type: ./agent unenroll
type: ./agent uninstall

Install Pulse Agent and Liota

This step copies the necessary files and starts installation process.
Type: cd /home/pi/makerspace

Type: ./install.sh

When prompted for “Enter your Edge System Name Without Spaces”, type your name and hit enter, so your edge system can be uniquely identified

When Prompted for Passphrase, type: makerspaceand hit enter

You will see the following message, indicating successful installation

Fri Aug 17 08:48:11 PDT 2018 : Installation successful

Fri Aug 17 08:48:11 PDT 2018 : Run /opt/ice-client/iotcc to register the Edge System

Start Pulse Agent, Liota and Onboard Gateway to Pulse

This step completes the installation and starts Pulse agent, Liota and onboards the gateway with Pulse.
Type: cd /opt/ice-client and press enter.
Type: ./iotcc --start-liota-as-root and press enter
When prompted for userID: type iottech and press enter.
When prompted for password, type Password1! and press enter.
Note P is upper case. At this point, you will see a message indicating that Pulse and Liota have started The Raspberry PI is now onboarded to Pulse.

Write Liota Code to Collect Metrics 

Pick a Sensor you want to work with.  Sample code and circuits are provided for two sensors here:

 

BMP 280 Circuit and Liota Code:

 

VCC: PIN 4 (5V)
GND: PIN 6
SCK: PIN5 (SCL1)
SDI: PIN 3(SDA1)

Load and Run Liota Script to Collect Metrics

This step copies the Liota User Package to the Liota Folder, registers the Package with Liota daemon to gather the metrics. bmp280aws.py is the liota package. This package will contain a user defined method (UDM) which will pull collect the metrics. The package also spawns a thread (which calls the fetch_temperature method) to collect the metrics and write to a file. The file will be read in the UDM (device_metric method) and the package will send the metrics to wavefront using the Wavefront DCC over MQTT (DCC Communication protocol). 

Now you have copied the metrics collector package to the liota folder and loaded it into liota using the bmp280.sh script

The Metrics are now sent to Wavefront

 

 

MotionSensor Circuit and Liota Code:

VCC: PIN 4 (5V)
GND: PIN 6
Data: PIN7 (GPIO 4)

Load and Run Liota Script to Collect Metrics

This step copies the Liota User Package to the Liota Folder, registers the Package with Liota daemon to gather the metrics. motionsensor.py is the liota package. This package will contain a user defined method (UDM) which will pull collect the metrics. The package also spawns a thread (which calls the fetch_motion method) to collect the metrics and write to a file. The file will be read in the UDM (device_metric method) and the package will send the metrics to wavefront using the Wavefront DCC over MQTT (DCC Communication protocol). 

Now you have copied the metrics collector package to the liota folder and loaded it into liota using the bmp280.sh script

The Metrics are now sent to Wavefront

Liota and Wavefront: Getting Wavefront Running

To get the full experience for the Liota and Wavefront, you first need to get an account on the lab instance. See the VMware {Code} staff at the show, and they can help, or sign up here: http://wavefront.com/lab/   If you are reading this after the show or you get a 404, sign up at: http://wavefront.com/sign-up/.

ext, you will receive an email inviting you to login and set your password.

Then you can login, and look around. I recommend you star by making a chart. To do this:

  1. Go to Dashboards->Create Chart when you login.
  2. You will see a field with a lightning bolt and a gear. Put in the name of your metric.
    1. It will be something like makerspace.liota.<iottech>.BMP280.Temperature if you are using the BMP280 mentioned above.
    2. If you click on the gear icon, it will show you what the query looks like in our powerful query language.
  3. Try selecting a section of the graph to see how you can zoom in. Click “Reset” to pop out.
  4. Click on “Live Data” in the upper left to watch data change as it comes in from Liota.

You can also read more about how this lab uses Wavefront here

 

Raspberry Pi 3 B+: 

  • https://www.amazon.com/ELEMENT-Element14-Raspberry-Pi-Motherboard/dp/B07BDR5PDW/ref=sr_1_3?s=electronics&ie=UTF8&qid=1535390523&sr=1-3&keywords=raspberry+pi+b%2B

BMP280 Sensor: 

  • https://www.amazon.com/Barometric-Pressure-Sensor-BMP280-temperature/dp/B01NAK6BL2/ref=asc_df_B01NAK6BL2/?tag=hyprod-20&linkCode=df0&hvadid=198075247191&hvpos=1o1&hvnetw=g&hvrand=7493594651512419688&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9031971&hvtargid=pla-320025494081&psc=1

Jumper Wires

  • https://www.amazon.com/SUNKEE-100pcs-female-jumper-Dupont/dp/B00AYCON8Y/ref=sr_1_2?s=hi&ie=UTF8&qid=1535390818&sr=8-2&keywords=sunkee+jumper+wires

NOOBS SD Card

  • https://www.amazon.com/Raspberry-8GB-Preloaded-NOOBS-Card/dp/B00GFA48N4

Liota References:

https://github.com/vmware/liota/wiki/Liota-Developer-Guide

https://github.com/vmware/liota/tree/master/packages/user_packages