thomasjsn

5 ms·

1.
Getting fiber between the house and garage(blog.cavelab.dev)
2 points by thomasjsn 2y ago|0 comments
2.
by thomasjsn 4y ago
Yes :) They could be bonded for redundancy or increased bandwidth, or used for different VLANs.
3.
by thomasjsn 4y ago
There is room in the conduit, and pulling two is just as easy as pulling one. So it just makes sense to pull two I think — for future-proofing.
4.
by thomasjsn 4y ago
Thank you, glad you found it useful :)
5.
Running CAT6 to the twins’ rooms – inside interior wall(blog.cavelab.dev)
3 points by thomasjsn 4y ago|6 comments
6.
by thomasjsn 4y ago
Author here. No advantage on 1 Gbit, I replaced the cable for two reasons: - The CAT 5e was too short, ending in the junction box in the entryway. I needed it to continue down to the basement. - Even though the switch is only 1 Gbit now, it
7.
by thomasjsn 4y ago
Thank you :) We use the Armed home option at night, we do remember to turn if off, because the digital calendar and lights in the kitchen won't turn on when it's activated. Kids are always a good excuse to create silly and fun pro
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by thomasjsn 4y ago
Thanks :) There has been some reports here in Norway of alarm station employees sharing photos of nude people — caught on their own motion sensor cameras triggering the alarm…
9.
by thomasjsn 4y ago
I agree. The ZigBee protocol is encrypted, but a replay attack is probably still possible. Another advantage of a hard wired panel is that it's not dependent on the Zigbee network being operational, and could be operated on the backup
10.
by thomasjsn 4y ago
Thank you :) I think for people willing to put in the time — things have certainly become much easier. I started with AVR microcontrollers about 20 years ago, and couldn't even dream of accomplishing things I am easily able to to today
11.
by thomasjsn 4y ago
Thank you kind sir, that is great feedback. Very motivating :) I think we all have it in us to write good texts, but it takes some motivation, dedication, and practice :)
12.
by thomasjsn 4y ago
Thank you :) There is no protection against voltage spikes on the inputs, there is just the pull-up resistor on the Raspberry Pi input. So this is a weak point. I did consider both EOL resistors and optoisolators when I first got started. B
13.
by thomasjsn 4y ago
Good advice, this is what I do. I expose a few services on HTTPS, behind a reverse proxy. Everything else is WireGuard.
14.
by thomasjsn 4y ago
Maybe, but now I have one :) It has uses outside the security aspect as well; water alarm, door open notifications, home automations, it's fun and a great learning experience. Seeing how many people have expensive monitored alarm syste
15.
by thomasjsn 4y ago
I actually like the messy electronics and integration work :) But it does look like a really well designed product.
16.
by thomasjsn 4y ago
> no ESD (high voltage impulse) protection From the grid? See below. On the inputs? No, you're right. > reliable power source Not included in this post, because I'm not done with it yet, is the backup battery. The entire sys
17.
by thomasjsn 4y ago
Thank you :) I don't allow SSH into my home network — I only SSH into the Raspberry Pi to work on, or modify, the alarm system when I'm at home. For remote access to the alarm system itself I use Home Assistant, which communicates
18.
by thomasjsn 4y ago
I really like simple strip boards, as it allows me to make modifications after the fact. And I don't have the patience to wait for PCBs to arrive from China :p
19.
by thomasjsn 4y ago
> That’s great. How often do you test it? Most sensors gets used on a daily basis — as they are part of other home automation, like motion activated lighting. I can put the system in "walk test" mode, which gives a verification
20.
by thomasjsn 4y ago
Agreed, I have no outdoor sensors — but will be installing an outdoor siren. It is delayed by one third of the trigger time, so with 60 seconds trigger time — the outdoor siren is delayed by 20 seconds. Should we set off the alarm by accide
21.
by thomasjsn 4y ago
Thank you :) Calling the police would be ideal, but then you have to involve an alarm company and use their system. They are expensive, and I wanted to build something myself. 1. Hm, maybe. If they were to arrive, they would have to call me
22.
Raspberry Pi security alarm – the basics(blog.cavelab.dev)
416 points by thomasjsn 4y ago|75 comments
23.
Running a conduit with CAT6 and fiber – from the basement to the attic(blog.cavelab.dev)
1 points by thomasjsn 5y ago|0 comments