Ethereum IOT Kid Grounding Device IV: Arduino & In Retrospect

Ethereum IOT Kid Grounding Device IV: Arduino & In Retrospect

This is the 4th and final part of the Ethereum IOT Kid Grounding Device project. In this part, I will focus on describing the process of putting together the PIR sensor to write to the Ethereum Blockchain whenever the kid moves. I will also discuss my thoughts behind this project, explaining where it is lacking and how I could make it better in its next iteration.

You may read part 1 here,  part 2 here and part 3 here.

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?