Wi-Fi HaLow promises something that sounds ideal for a house with a large garden, a detached garage or an allotment: Wi-Fi that reaches about a kilometre, passes through walls and runs a sensor on a battery for months. Modules, Raspberry Pi add-on boards and small routers have started to appear. Before you buy, though, it helps to know that HaLow in Europe works under much tighter rules than in the United States, and that many of the kits you will find online are not legal to use here at all.
What Wi-Fi HaLow is
Wi-Fi HaLow is the Wi-Fi Alliance name for IEEE 802.11ah. Instead of 2.4, 5 or 6 GHz, it uses spectrum below 1 GHz. Lower frequencies travel further and get through walls and vegetation better, at the cost of much lower data rates.
According to the Wi-Fi Alliance, HaLow offers:
- a range of approximately 1 km,
- strong wall penetration,
- low power use, with months to years of battery life on a coin cell for suitable devices,
- native IP support, so a device is an ordinary network client with an IP address,
- the latest Wi-Fi security,
- no proprietary hub: a HaLow access point bridges to your normal network.
That last point is the main difference from Zigbee, Z-Wave or LoRaWAN. A HaLow sensor can talk MQTT or HTTP directly to your broker, without a coordinator or network server translating for it.
The European catch: narrow channels and duty cycle
In the United States, HaLow uses 902-928 MHz with channels up to 8 MHz wide and, depending on the chip, data rates in the tens of Mbit/s. In Europe, the available band is 863-868 MHz, the same short-range device band used by LoRaWAN, many 868 MHz alarm sensors and other low-power radios. That has three consequences.
Only 1 and 2 MHz channels. Five megahertz of spectrum leaves room for five 1 MHz channels or a couple of 2 MHz channels. A Morse Micro engineer confirmed on the company's community forum that the EU only has 1 and 2 MHz channels.
Duty cycle limits. Devices in this band may transmit only a fraction of the time. In the same thread Morse Micro explained that the limits are 10% for an access point and 2.8% for a station (client), measured over an hour. That is 360 seconds of transmission per hour for the access point and roughly 100 seconds per hour for each client, and those totals include acknowledgements, management frames and, on the access point, beacons. The firmware spreads transmissions across the hour so that a device does not use up its allowance at once.
Low throughput. With 1 MHz channels the physical layer peaks at a few Mbit/s, and the duty cycle caps what you can send over an hour far below that. Forum users who worked through the ETSI rules concluded that even continuous low-resolution video is a stretch. ALFA Network lists the HaLow side of its HaLow-R router at 150 kbit/s to 15 Mbit/s across all channel widths, with the top figures only reachable on the wider channels not available in Europe.
In practice: HaLow in Europe is for sensors, meters, gates and switches that send small messages. It is not a way to put a camera at the end of the garden.
Hardware: check the region before buying
HaLow chips from Morse Micro (the MM6108 and the newer MM8108) sit inside most current modules and routers. The chip itself can work in the EU band, but a module often needs a region-specific filter and certification. On the Morse Micro forum, a company representative pointed out that:
- the Seeed Wio-WM6180 kit, built on a Quectel module, supports only the North American and Australian bands and will not work on EU spectrum,
- Quectel sells a separate module variant for Europe,
- AsiaRF's Raspberry Pi HAT (MM610X-H06) comes in separate US, EU, JP and NZ/AU variants,
- the MM8108 has an integrated power amplifier, so future modules should need fewer region-specific versions.
Heltec's documentation for its HT-HC01 kit only covers 902-928 MHz, and a reply on the Heltec community forum in November 2025 said that EU-band versions were still in alpha testing. ALFA Network's European shop lists the HaLow-R indoor router (MediaTek MT7628 plus Morse Micro MM6108, OpenWrt with source available) for 868 or 915 MHz, but it was out of stock when this article was written.
Using a US-band device in Poland or elsewhere in the EU is not a grey area: 902-928 MHz is not a licence-exempt band here, and in Europe parts of it overlap with GSM-R railway and mobile network spectrum. Only buy hardware explicitly sold for 863-868 MHz.
Software support for the EU band is also still uneven. Forum threads from late 2025 and 2026 show hobbyists with EU-variant boards who could load the EU regulatory settings but struggled to get two nodes to associate, especially in mesh mode. Expect to spend time with OpenWrt configuration and the vendor's board configuration files.
HaLow, LoRaWAN, Zigbee and ordinary Wi-Fi compared
| Wi-Fi HaLow (EU) | LoRaWAN (EU868) | Zigbee / Thread | Wi-Fi 2.4 GHz | |
|---|---|---|---|---|
| Typical range | up to ~1 km | kilometres | tens of metres per hop, mesh | tens of metres |
| Data rate | low, duty-cycle limited | very low | low | high |
| IP on the device | yes | no | Thread: yes, Zigbee: no | yes |
| Needs | HaLow access point | gateway and network server | coordinator or border router | router |
| Battery devices | yes | yes, very long life | yes | difficult |
| Hobbyist hardware in EU | limited | mature | mature | mature |
LoRaWAN covers longer distances with even less data and has a mature ecosystem of EU-certified sensors. Zigbee and Thread cover a house well through mesh. HaLow sits between them: more data than LoRaWAN, more range than Zigbee and native IP, but with far fewer finished products.
When HaLow makes sense today
HaLow is worth trying if:
- you need IP connectivity (for example MQTT over TLS straight from the device) to a building 200-800 m away,
- a LoRaWAN payload of a few dozen bytes is too small for what you send,
- you are comfortable with OpenWrt and early hardware.
It is not yet a good choice if you want a finished product that pairs with your smart home platform in five minutes, or if you need to stream audio or video in Europe.
A pragmatic alternative for an outbuilding is often simpler: a point-to-point 5 GHz Wi-Fi bridge or a buried Ethernet cable to the building, with Zigbee or ordinary Wi-Fi devices inside it.