Wi-Fi HaLow Explained

Sub-GHz long-range wireless that links cameras and sensors across acres — no trenching, no per-camera SIMs.

WiFi HaLow (802.11ah) is a sub-GHz wireless standard purpose-built for the kind of distances rural sites deal with every day. Running on the 868MHz band in the UK rather than the crowded 2.4/5GHz of ordinary WiFi, it carries a usable signal across hundreds of metres — up to a kilometre in clear conditions — and slips through hedges, barns and outbuildings far better than the WiFi you use in the farmhouse. This guide explains HaLow in plain farming terms: how one base station can knit together cameras and sensors spread across a yard, a field boundary or an outlying parcel without digging a single trench or buying a SIM for every device. We cover realistic range and throughput, how mesh and repeater nodes stretch coverage further, and where HaLow earns its keep against 4G and LoRaWAN on a working farm or estate.

Key features

• Why Sub-GHz Travels Further. 868MHz signals carry further and bend around barns, banks and woodland better than 2.4/5GHz WiFi — the physics that make HaLow suit open farmland.
• Range Across Open Ground. What to actually expect across yards, fields and tree lines — clear line-of-sight figures versus the real numbers once buildings and hedgerows get in the way.
• Throughput for Live Video. HaLow's 1–40 Mbps band is plenty for several camera feeds at once, so you can watch the gate, the grain store and the stock pens without a wired backhaul to each one.
• Low-Power Sensor Networks. Target Wake Time lets battery and solar sensors — gate contacts, water-trough levels, tank monitors — sip power and run for years between attention.
• Mesh & Repeater Coverage. Add nodes to hop the signal over a hill or out to a far paddock; cameras and sensors latch onto the strongest link and pass traffic back to the base.
• HaLow vs 4G vs LoRaWAN. A straight comparison of range, bandwidth, power draw and running cost so you can match each technology to the right job on your holding.

What range and coverage can I expect across a holding?

With clear line-of-sight across open ground, HaLow can reach around a kilometre — enough to link an outlying gate or field camera back to the yard. Through buildings or across cluttered farmsteads, expect a more realistic 200–400 metres depending on wall thickness, steel sheds and interference. Woodland, rising ground and metal grain stores all eat into that, so a quick site walk to map your camera and sensor points pays off before you commit.

To cover a larger estate or jump over an obstacle like a hill or a belt of trees, add repeater nodes or extra base stations. Each one creates its own coverage zone and the network meshes together, with cameras and sensors hopping onto the strongest path back to base — so you can grow outward from the yard rather than trenching cable to every corner.

Frequently asked questions

Is HaLow just normal farmhouse WiFi with more range?

No. HaLow is a WiFi standard (802.11ah) but works on the sub-GHz 868MHz band rather than the 2.4/5GHz your home router uses. That lower frequency is what gives it the reach, but it means HaLow gear talks only to other HaLow gear — your phone or laptop won't connect to it.

Can I use my existing farm cameras with HaLow?

Only if they have a HaLow radio built in. A standard WiFi or 4G camera can't join a HaLow network, so plan around HaLow-ready cameras and sensors or add a HaLow bridge to existing kit.

Are there monthly charges or SIMs to manage?

None. HaLow runs on licence-free spectrum, so there are no SIM cards and no data plans for the devices on the network — just the one-off cost of the base station and the HaLow cameras or sensors. You only need cellular or broadband at the base station to view footage off-site.

Will the signal reach into stone barns and steel sheds?

Better than ordinary WiFi will. The sub-GHz signal passes through thick stone walls and around steel structures more readily, which is why HaLow suits older farm buildings and metal-clad sheds where 2.4GHz WiFi struggles to get past the first wall.

How many cameras and sensors can one base station carry?

A single base station typically handles dozens of devices — often 50 or more. In practice the ceiling depends on how much live video you're pulling; a handful of streaming cameras plus a scattering of low-data sensors sits comfortably within one base across most farms.

Do I need permission to put up a HaLow network?

No. The spectrum is licence-free and the base station is usually a compact unit mounted in a barn or on a building, so no licence or planning permission is needed for the wireless link itself. Standard rules still apply to any new mast or pole you erect to mount kit.

Can I expand it as the farm grows?

Yes. Add more HaLow cameras or sensors as you need them, and drop in extra base stations or repeater nodes to push coverage out to new buildings, a bought parcel or a far field boundary.