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Problem Commercial vehicle fleet managers are required by law to track various driver and vehicle behaviors. Beyond the data logging mandated by law, there are other behaviors that employers might want to track. If they had a low-cost, reliable, and technical monitoring solution, they could remove or minimize the risks associated with their fleet management.

Solution We will create a Twilio-powered Fleet Tracker that uses off-the-shelf components to track and log: miles driven, hours of uptime and downtime, locations, average speed, and fuel consumption.

Degree of Difficulty (1-5): 2 This device requires some knowledge of the C programming language, microcontroller basics, and GPIO wiring.

Before we get started, here's a quick overview of what you'll need to build the Fleet Tracker:

Electronic Components In order to build your own Fleet Tracker, you'll need the following items:

• 1x Twilio Programmable Wireless SIM
• 1x Programmable Wireless Starter Pack
• 1x OBD-II adapter
• 1x GPS antenna
• 1x RF antenna
• 1x Arduino header pins

Serverless Twilio Fleet Tracker involes 3 separate development process

• Twilio Runtime Functions
• Angular Single Page Application
• MultiTech Dragonfly hardware

If you do not want to build everything yourself, you could skip all steps related to building assets, and take artifacts and instructions from https://github.com/twilio/wireless-fleet-tracker/tree/serverless/assets directly.

• Build twilio-runtime-utils with make build
• Setup PATH to twilio-runtime-utils.sh shell script
• Checkout twilio-connected-devices branch of wireless-co-pilot

Go to runtime directory.

$ twilio-runtime-utils.sh -c context-local.yaml run Authenticator/descriptor.yaml Authenticator/testdata/simple.yaml 
{"success":true,"username":"twilio","ttl":3600,"token":"eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiIsImN0eSI6InR3aWxpby1mcGE7dj0xIn0.eyJqdGkiOiJTSzI2MzQ3MTM2N2E0OGI2Yjc4NjEyZTQyYzA5ZmFkNmI3LTE0OTUyMDQ5NDkiLCJncmFudHMiOnsiaWRlbnRpdHkiOiJ0cnVtcCIsImRhdGFfc3luYyI6eyJzZXJ2aWNlX3NpZCI6IklTYzg5NThjOGIzODNmZmM2YjhkMTc2ZmJlYmViMWE1YTkifX0sImlhdCI6MTQ5NTIwNDk0OSwiZXhwIjoxNDk1MjA4NTQ5LCJpc3MiOiJTSzI2MzQ3MTM2N2E0OGI2Yjc4NjEyZTQyYzA5ZmFkNmI3Iiwic3ViIjoiQUM3OTMzOTk2M2E5OWY0NzZlNmYwYjMyMTRhYmQ0OGE5ZCJ9.IPQ5QTkTacXaQ4YI4nifii_yrabI5Fk5gzYse8M4tT4"}

$ twilio-runtime-utils.sh -c context-local.yaml run FleetManager/descriptor.yaml FleetManager/testdata/list.yaml  

$ twilio-runtime-utils.sh -c context-local.yaml run FleetManager/descriptor.yaml FleetManager/testdata/add.yaml  

...

Currently twilio runtime RESTful API is not available, manual deployment process is needed. However you could follow instruction generated by the following commands:

$ twilio-runtime-utils.sh -c context-local.yaml deploy FleetManager/descriptor.yaml 

$ twilio-runtime-utils.sh -c context-local.yaml deploy Authenticator/descriptor.yaml 

For Twilio Fleet Tracker, two functions are required:

• Authenticator, token authentication for Admin UI
• FleetManager, list/add/delete/genkey for vehicles

Go to angular directory.

$ npm install
$ ./node_modules/.bin/grunt dev

$ ./node_modules/.bin/grunt build

Upload these files to Twilio Runtime assets:

$ ls -lh angular/build/assets/*.{js,html,js.map}
-rw-r--r-- 1 zmiao TWILIO\Domain Users 1.7K Aug 16 16:41 angular/build/assets/index.html
-rw-r--r-- 1 zmiao TWILIO\Domain Users  16K Aug 16 16:41 angular/build/assets/index.js
-rw-r--r-- 1 zmiao TWILIO\Domain Users  63K Aug 16 16:41 angular/build/assets/index.js.map
-rw-r--r-- 1 zmiao TWILIO\Domain Users 160K Aug 16 16:41 angular/build/assets/styles.js
-rw-r--r-- 1 zmiao TWILIO\Domain Users 343K Aug 16 16:41 angular/build/assets/styles.js.map
-rw-r--r-- 1 zmiao TWILIO\Domain Users 465K Aug 16 16:41 angular/build/assets/vendor.js
-rw-r--r-- 1 zmiao TWILIO\Domain Users 2.0M Aug 16 16:41 angular/build/assets/vendor.js.map

1. Create an ARMmbed developer account
2. Visit the Dragonfly Fleet Tracker repository
3. Click the yellow Import into Compiler button
4. Click the Import button

That's it! As a reminder, full instructions for this tutorial can be found in the Fleet Tracker Blueprint.