Requirements

A project log for Home weather station

IoT sensors to capture the weather. I also want to record, store and graph the data.

Lee Stephens • 08/22/2018 at 13:11•0 Comments

Let's split the requirements into three.

First, outside the house:

Name	Description	Type
Temperature	Record the current temperature to a minimum of 0.5 of a degree celsius	Must
Humidity	Record the humidity as a percentage	Must
Pressure	Record the pressure in millibar	Must
Wind speed	Record the average wind speed over a ten minute period, record the highest gust over a 0.25 second period¹	Should
Wind direction	Record the average wind direction over a ten minute period	Should
Rainfall	Record rainfall in mm	Should
Sunshine	Record minutes of direct sunshine	Should
Unattended operation	The device should need no physcial attention. Obviously there will be a need for maintenance, but this should be kept to a minimum	Should
Low cost	On the basis that it may be damaged or stolen, it would be good to keep the costs low	Should
Battery powered	Be capable of being powered by batteries for an extended time period.	Must
Solar charge	Use a solar cell to recharge the battery, hopefully to avoid the need to change the batteries	Should
Aesthetically pleasing	The sensors should be housed in an aesthetically pleasing housing, suitable for the garden	Should
Able to cope with being outside	Electronics will need to be kept dry, power must be supplied even in low temperatures.	Must
No local storage	Recordings should be sent into a central service for long term retention and visualisation	Should

Secondly, the data storage system:

And finally, the visualisation and end user experience:

Next log

Overall thoughts on pre-build

08/22/2018 at 13:12 • 0 comments

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