Network

Overview

The network consists of a cable modem feeding an OpenWrt router/AP, which in turn uplinks to the mezzanine switch. From there, connections run to two loft patch panels: one Blue, one Grey. Each network drop in the space has a corresponding Blue and Grey jack; only some are wired through to the switch, and only some are currently used.

Blue and Grey cables are functionally identical. The colours reflect physical routing rather than logical separation.

Static Devices

Most fixed equipment uses static DHCP leases on the OpenWrt router. If you add a static IP address, give it a static DHCP lease on the openwrt router, even if the device doesn't use dhcp. These are the main devices:

Device	IP Address
OpenWrt router	192.168.0.1
Home Assistant	192.168.0.2
Lazzor	192.168.0.4

Patch Panel Map

Cabling map: Grey (left, top) ↔ Blue (right, bottom)
Grey device / location	Switch port	Label	Switch port	Blue device / location
Lobby black cable	1	1 Laser Loft	2	Lobby AP
Lazzor	3	2 Laser Room	4	Laser room computer
(unused)	5	3 Craft Shelf Arch	6	(unused)
(unused)	7	4 Craft Shelf Top	8	Payphone
(unused)	9	5 Cubesville	10	(unused)
Game of Life cube	11	6 Main Room Beam Front	12	Main table Ethernet (phone, switch)
(unused)	13	7 Main Room Beam Back	14	Main Room AP
(unused)	15	8 Tool Town L (breaker panel)	16	Sherline computer
(unused)		9 Tool Town R (shopbot)		(unused)
(unused)		10 Mezzanine R (unterminated)		(unused)
(unused)		11 Mezzanine L (unterminated)		(unused)
(unused)		12 Main Room Couches (unterminated)		(unused)
Unconnected Grey ↔ Blue runs: 13–24

Router

Port	Connected device
WAN	Spectrum modem
LAN 1	(unused)
LAN 2	(unused)
LAN 3	(unused)
LAN 4	Mezzanine switch (uplink)

Mezzanine Switch

The ports on the left are for the patch panel.

The ports on the right are for uplink (yellow), and Home Assistant (purple).

The switch is unmanaged.

ToDo

OpenWRT setup
Ubiquiti setup

ESP32 near elevator door

(TODO new page dedicated to space access controls)

Currently, there's a m5stack ATOM-Lite (very small) ESP32 board hanging above the elevator door/intercom/laser loft stairs area. This serves:

Elevator door sensor inside(?) maglock housing (it is a reed switch)
Keypad in elevator shaftway (a direct wired 4x3 key matrix on the end of a cat5 cable)

ATOM-Lite publishes these into HA, where the sensor states are used in various automations related to locks. I think it publishes the elevator door sensor state over Bluetooth (why?) and publishes codes entered into the keypad over MQTT. See the config in ESPHome though.

Wiring (rat nest) "diagram":

[Pictures are worth 1000 words, but only if you can upload them. --Ed]

jumpers:

ATOM-Lite GND <=> WAGO <=> white twisted pair a terminal <=> elevator door sensor (reed switch)
ATOM-Lite GPIO21 <=> white twisted pair other terminal <=> elevator door sensor (reed switch)
ATOM-Lite GPIO 23 <=> grey jacket cat5, green-white <=> keypad terminal 5 (col 3) [2]
ATOM-Lite GPIO 19 <=> grey jacket cat5, green <=> keypad terminal 6 (col 2)
ATOM-Lite GPIO 22 <=> grey jacket cat5, brown-white <=> keypad terminal 7 (col 1)

breadboard:

ATOM-Lite 3v3 <=> 1 kΩ pull-ups to each of GPIO 25,32,26,33 [1]
ATOM-Lite GPIO 25 <=> pull-up & grey jacket cat5, blue-white <=> keypad terminal 1 (row 1) [2]
ATOM-Lite GPIO 32 <=> pull-up & grey jacket cat5, blue <=> keypad terminal 2 (row 2)
ATOM-Lite GPIO 26 <=> pull-up & grey jacket cat5, orange-white <=> keypad terminal 3 (row 3)
ATOM-Lite GPIO 33 <=> pull-up & grey jacket cat5, orange <=> keypad terminal 4 (row 4)

[1] Without these strong external pull-ups, the ~2meter twisted pairs run to the keypad is too noisy for the matrix scanning to work. Ask me how I know. 3.3 kΩ is better than the 45 kΩ (?) on-chip pull-ups but still not enough.

[2] here, 4 rows and 3 cols of the physical keypad layout; the ESPHome config calls the physical columns "rows" (pins configured as strobed outputs) and calls the physical rows "columns" (pins configured as inputs)

"Shelly" near elevator door

Switches 12v power to the elevator door maglock...