Ethereum IOT Kid Grounding Device II: Smart Contract

Ethereum IOT Kid Grounding Device II: Smart Contract

This is part 2 of my Ethereum IOT Kid Grounding Device project. In this part, we will discuss the business logic behind Grounder.sol, the Smart Contract that does the real work behind grounding my kid. You may read part 1 here.

I like to equate Smart Contract to the business logic layer of conventional apps which developers would have developed as JSON web services in tools such as node.js (if you like JavaScript) or django (if you like Python).

Zoe Helper: A Sigfox SOS Device - Part 2

Zoe Helper: A Sigfox SOS Device - Part 2

In this part of the project, I process the message sent by Sigfox Backend via callback. To recap, this is the message:

http://jacksonng.org/sigfox/newnotifications.php?message={data}&deviceid={device}

The job of newnotifications.php is to read the message, check who it is intended for, and send the message to the receiver's mobile device. 

Whose message is this?

EspressoLite Pulse Sensor with GPS

EspressoLite Pulse Sensor with GPS

Read Part 1 here

I updated the Pulse Sensor project to give the Pulse Receiver a GPS. 

Now the Pulse Sender (the wearable that you will strap on your wrist) will send your pulse rate to the Pulse Receiver (which you will wrap around your waist) and then, apart from learning about your pulse rate, it knows where on earth you are.

Bill-Of-Materials