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For property owners

Lend the network a little height

A repeater on your roof, pole, or hilltop can give a whole neighbourhood text messaging that keeps working when the power and cell towers don't. It's a small solar box that clamps on, runs itself, and costs you nothing. Here's everything that's involved in hosting one in Central Texas.

The equipment

What would go on your property

The node is one compact, self-contained unit. It doesn't need anything from your building, and it's easy to take down.

A small sealed box

A weatherproof enclosure about the size of a large flashlight, holding the radio and a battery, with a short antenna on top. The whole thing weighs around two pounds.

Its own power

A small solar panel keeps the battery charged, and the battery carries it through the night and a run of cloudy days. Nothing plugs into your building.

Clamped, not drilled

It goes onto something that already exists, a mast, a pole, a railing, a vent stack, with magnets, U-bolts or hose clamps. No holes in your roof, no screws in your siding.

No internet

The radio talks to other radios over the air. It never touches your Wi-Fi, your network, or your phone line, and there is no bill attached to it.

What it looks like once it's up

Repeaters built by members of the community, in place. Each one is a single unit with its own panel, and the builds pages list every part that goes into them.

Your part

What hosting asks of you, and what it doesn't

Hosting is meant to be close to effortless. The things a node needs from you are a good spot and your say-so. Everything else is on us.

  • Needed:A spot with open sky and a view toward the surrounding area, the higher the better
  • Needed:Your permission, and the owner's too if you rent
  • Needed:Access for a short visit to install it, and once or twice a year after that, arranged ahead of time
  • Not needed:Electricity, an outlet, or a cable run into the building
  • Not needed:Internet access or a Wi-Fi password
  • Not needed:Drilling, roof penetrations, or anything permanent
  • Not needed:Money, a subscription, or a long-term contract
  • Not needed:Any upkeep, checking on it, or knowing how it works
Good sites

Why height is the whole game

LoRa radio travels by line of sight. A node at ground level is boxed in by houses, trees, and hills; the same node thirty feet up can see for miles. That's why a host matters more to the network than any piece of hardware.

Tall structures

Commercial rooftops, water towers, grain legs, windmills, flagpoles, light poles, and existing masts. Anything that already rises above its surroundings.

High ground

A hilltop or ridgeline with a view in several directions is worth more than a tall building in a valley. Much of the Hill Country is covered from a handful of these.

Steady and secure

Somewhere the node won't be bumped, shaded by new growth, or moved by accident, with all-day sun on the panel.

Not sure your property qualifies? Ask anyway. A modest site in the right place, near a gap on the coverage map, can matter more than an impressive one where coverage already exists.

Two ways to host

Our node, or your own

Most hosts

We put up a node on your site

Comchan supplies the repeater, installs it, keeps it running, and takes it away when you're done. The hardware is paid for by donations and members, so it costs you nothing. All you provide is the spot.

If you're curious

You own the node yourself

Buy or build a repeater and it's yours outright, staying up as long as you like. Parts run from about $35 to a few hundred dollars depending on the build. Our repeater builds list every part, and volunteers will help you pick hardware, set it up, and get it mounted. Plan on a firmware update once or twice a year.

The process

How it goes

  1. 01

    Get in touch

    Email support@comchan.net or find us through the community page. Tell us roughly where the property is and what kind of height it has: a roof, a pole, a hilltop, a tower.

  2. 02

    We check the site

    A volunteer runs the location through the mesh explorer to see what it can reach, then talks it through with you. Not every spot works out, and we would rather tell you that up front than put up a node that hears nothing.

  3. 03

    Pick the spot together

    You decide where it can and can't go. We'll suggest the mounting point that gets the best view and the most sun, and how it would attach.

  4. 04

    Install

    A short visit at a time that suits you. The node is clamped on, switched on, and checked from the ground to make sure it's talking to the rest of the mesh.

  5. 05

    Forget about it

    From then on it runs itself. Its health is watched remotely on the network analyzer, so if it ever needs attention, we'll know before you do and arrange a visit.

Questions

What property owners ask

If yours isn't here, ask us directly. There's no obligation in asking.

This is a community network

Comchan is run by volunteers. Nobody is paid, nothing is sold, and no company owns the mesh. A node on your property serves everyone within reach of it, including you.
Who is liable if something happens?+
Premises liability stays with you as the property owner, the same as for anything else on your land. Comchan is a volunteer group, not an insurer. What we can tell you is what the equipment is: small, low-voltage, battery and solar powered, and firmly mounted. If it worries you, a quick call to your insurance agent will settle it.
Do I need a permit, or HOA approval?+
Small, non-commercial installations like this generally don't need a building permit, but rules vary by city, so check with yours if you're unsure. HOAs are a different matter: many have covenants about antennas or anything visible from the street, so read yours first. If you rent, get the owner's permission in writing before anything goes up.
Will it interfere with my Wi-Fi, TV, or phone?+
No. It transmits on the license-free 902–928 MHz band, the same one garage door openers and baby monitors use, well away from Wi-Fi, cellular, and broadcast TV. The radios are FCC-certified and very low power. See How LoRa works for more.
Is the radio safe to be around?+
It transmits at under one watt, in bursts lasting a fraction of a second, and spends nearly all its time listening. That's less power than a cell phone, and it sits on a roof or pole rather than against anyone's head.
Does it make a lightning strike more likely?+
No more than a TV antenna or a weathervane would. The antenna is short and thin, and the node is not wired into your building's electrical system.
Can it see my network or the messages it carries?+
No to both. It has no connection to your network at all, and the messages it relays are end-to-end encrypted, so the repeater forwards them without being able to read them. Nobody, including us, can use it to see anything on your property.
Will my address show up on a map?+
Repeaters advertise a location so people can see where coverage comes from and plan around it, and it shows on the public network analyzer. If you'd rather your exact address wasn't pinned, say so and the pin can sit nearby instead.
How long do I have to keep it?+
As long as you want and no longer. There's no contract or minimum term. Ask and we'll come take it down, or unclamp it yourself, it comes off without leaving a mark.
Can it carry my business name?+
Yes. Every node has a name, and it shows on the live map and in the contact list of anyone who hears it. Plenty of businesses like being the reason the neighbourhood has coverage.
How far will it reach from my property?+
It depends almost entirely on height and what is in the way. A low site might cover a mile or two; a hilltop or tall building can reach ten miles or more. Each node also relays for the ones it can hear, so it extends the whole network, not just a circle around you.

Have a roof, a pole, or a hill?

Tell us where it is and what's up there. We'll check what it could reach and get back to you, with no commitment either way.

support@comchan.net