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update light-meter doc.

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Craig Oates 2 years ago
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digraph overview {
node [fontname = Arial];
subgraph cluster0 {
style = filled;
color = lightgrey;
l1;
l2;
}
l1 -> server;
l2 -> server;
server -> r1;
server -> r2;
r1 -> server;
r2 -> server;
l1 [label = "Light Meter 1", color = lightblue, style = filled];
l2 [label = "Light Meter 2", color = orange, style = filled];
r1 [label = "Relay 1", color = lightblue, style = filled];
r2 [label = "Relay 2", color = orange, style = filled ];
server [label = "Midpoint (Server)"];
}

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light-meter/rtr-light-meter.md
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# Return to Ritherdon: Light Meter
## Table of Contents
Light Meter is one of three smaller projects which make-up the
'Personal Flash in Real-Time' -- which is one artwork within the main
'Return to Ritherdon' project. You should view the three smaller
projects as one project. And, for the purpose of this documentation, I
will refer to 'Personal Flash in Real-Time' as a system instead of an
artwork.
To be added later...
For more information on the 'Return to Ritherdon' project, use the
following link:
## Return to Ritherdon: Project Overview
- [Return to Ritherdon Overview](https://git.abbether.net/return-to-ritherdon/rtr-docs)
**Disclosure: This document was written by [Craig
Oates](https://git.abbether.net/craig.oates) and all information I
have cited about the other parties where taken from their respective
websites. I have, also, applied minor editing in places to help
readability - in the context of this document. Please use the links listed
below for the original/official version of the sourced material. Craig
is the author of the software in this repository.**
### 'Personal Flash in Real-Time': Project Overview
## Return to Ritherdon Overview
'Return to Ritherdon' is a two year residency at Ritherdon & Co Ltd, a
manufacturer of metal enclosures based in Darwen, Lancashire U.K. It
was devised by artist Nicola Ellis and funded by Arts Council England.
- [Nicola Ellis](http://www.nicolaellis.com)
- [Ritherdon](https://www.ritherdon.co.uk/about-us/)
- [Arts Council England](https://www.artscouncil.org.uk/)
### About the Artist: Nicola Ellis
Nicola is interested in the properties, value, function and
circulation of materials. She has a current focus on metals and the
companies that work with them, her work draws on the visual and spoken
language of industry operations, fabrication and profiling
processes. The parameters for her sculpture, installation, drawings
and videos include relationships between people, businesses and
technology.
### About the Manufacturer: Ritherdon
Established in 1895, Ritherdon have been manufacturing a variety of
electrical enclosures and related products for many decades. A
combination of a passion for innovation with close working
relationships with their customers means that they are continually
developing and expanding their product ranges.
### About: Arts Council England
They were set up in 1946, by Royal Charter, to champion and develop
art and culture across the country. They are governed by an Executive
Board and National and Area Councils.
- [Arts Council England's Royal
Charter](https://www.artscouncil.org.uk/sites/default/files/download-file/Consolidated_Royal_Charter_2013.pdf)
## Light Meter: Project Overview
Light Meter is one of three smaller projects which fall within the
Return to Ritherdon project. You should view the three smaller
projects as one project but, at the time of writing, the project does
not have a name. So, for the time being, I will refer to it as
'Artwork 1'.
### 'Artwork 1': Project Overview
The overall project ("Artwork 1" not 'Return to Ritherdon' or 'Light
Meter') consists of three separate/smaller projects. The names of the
smaller projects are a by-product of the software development
process. You should not view them as individual pieces within the
overall project. From an artwork point-of-view, "Artwork 1" is one
piece. The name of the software projects are 'Light Meter' (which is
this one), 'Midpoint' and 'Relay'. All three projects reside in their
own git repositories. You can find the other project's repositories at
the following links:
The overall system ('Personal Flash in Real-Time') consists of three
separate/smaller projects. You should not view them as individual
pieces within the overall project. From an artwork point-of-view,
'Personal Flash in Real-Time' is one piece. The name of the software
projects are 'Light Meter' (which is this one), 'Midpoint' and
'Relay'. All three projects reside in their own git repositories. You
can find the repositories at the following links:
- [Light Meter](https://git.abbether.net/return-to-ritherdon/light-meter)
- [Mid-Point](https://git.abbether.net/return-to-ritherdon/midpoint)
- [Relay](https://git.abbether.net/return-to-ritherdon/relay)
@ -151,12 +103,9 @@ website.
**A good quality 2.5A power supply can be used if downstream USB
peripherals consume less than 500mA in total.**
- [Raspberry Pi 4 Model B product
brief](https://static.raspberrypi.org/files/product-briefs/200521+Raspberry+Pi+4+Product+Brief.pdf)
- [Raspberry Pi 4 Model B schematic
diagrams](https://www.raspberrypi.org/documentation/hardware/raspberrypi/schematics/rpi_SCH_4b_4p0_reduced.pdf)
- [Raspberry Pi 4 Model B mechanical
drawing](https://www.raspberrypi.org/documentation/hardware/raspberrypi/mechanical/rpi_MECH_4b_4p0.pdf)
- [Raspberry Pi 4 Model B product brief](https://static.raspberrypi.org/files/product-briefs/200521+Raspberry+Pi+4+Product+Brief.pdf)
- [Raspberry Pi 4 Model B schematic diagrams](https://www.raspberrypi.org/documentation/hardware/raspberrypi/schematics/rpi_SCH_4b_4p0_reduced.pdf)
- [Raspberry Pi 4 Model B mechanical drawing](https://www.raspberrypi.org/documentation/hardware/raspberrypi/mechanical/rpi_MECH_4b_4p0.pdf)
## Project Set-Up
@ -195,8 +144,7 @@ work on the command-line (if you are using a "headless" version of
Raspbian). If you are unsure how to connect to a router via wi-fi, use
the following link to learn how:
- [Raspbian Wi-Fi
Tutorial](https://www.raspberrypi.org/documentation/configuration/wireless/wireless-cli.md)
- [Raspbian Wi-Fi Tutorial](https://www.raspberrypi.org/documentation/configuration/wireless/wireless-cli.md)
The easiest way to do this is via the "raspi-config" file/command. You
can access it by entering `sudo raspi-config` into the console and