Research · 4 October 2026 · Denmark, Copenhagen 2300

Copenhagen Radio Kit868.95 MHz first · then 0.5–1766 MHz

Start with one genuine RTL-SDR Blog V4 and its dipole kit (608 kr delivered). Use it from your Mac to check whether your Diehl meters can be decoded. Only then buy a cheap always-on meter receiver, and add the Pi, LoRa board or gateway if you want them. Together, the first two buys come to about 1.004 kr.

Prices read on seller pages and baskets on 2026-10-04Delivered to Denmark, quantity 1ECB reference rates of 2026-10-02: €1 = 7.4736 kr, $1 = 6.658 kr, 1 SEK = 0.662 kr, £1 = 8.789 kr.

01What to buy, in order

Ranked by home delivery or service-point delivery to Copenhagen. No Danish shop stocks any of these radios, so there's no Copenhagen pickup option (see the pickup note further down). Every price links to the seller's product page.

Buy first: the explorer, and your meter test rig

RTL-SDR Blog V4 (R828D) + official Multipurpose Dipole Kit

from Electrokit (SE, authorised reseller); DHL Parcel Connect to a service point to Copenhagen
In stock Verified: product, photos, shipping

Covers almost everything on your list with one receiver: your meters at 868.95 MHz, aircraft at 1090 MHz, ships at 162 MHz, FM, DAB+, airband, ham bands and 433 MHz sensors. Shortwave works through its built-in upconverter. The dipole kit's telescopic elements can be set for each band. The V4 reached end-of-line on 14 May 2026, and this is a last batch from an authorised reseller, so buy now rather than wait. Its successor, the V4L, is sold out in Europe and its Mac drivers are behind.

Alternatives

RTL-SDR Blog V4 (R828D), dongle only at Electrokit (SE, authorised reseller): 749 SEK ≈ 496 kr (DHL Parcel Connect to a service point) In stock
Nooelec NESDR SMArt v5 Bundle (dongle + 3 antennas; 0.5 ppm TCXO, no bias tee) at amazon.de (sold by Nooelec, shipped by Amazon): 462,90 kr (free home delivery) In stock
RTL-SDR Blog V3 (R860, 1 ppm TCXO, bias tee), dongle only, USB-A at AliExpress, official RTLSDRBlog Store: 351,20 kr (free shipping (AliExpress)) In stock

918 SEK ≈ 608 kr

item 818 SEK + shipping 100 SEK

V4: 158 pcs, kit: 14 pcs; 1–3 days

Buy after the test: an always-on meter receiver

IoTLabs wM-Bus Gateway (ESP32 + SX1276 868 MHz, T1/C1, OLED, SMA antenna)

from IoTLabs via Lectronz (PL, ships from the EU); postal home delivery to Copenhagen
Low stock Verified: product, photos, shipping

A finished ESP32 + SX1276 receiver in a case, pre-flashed with ESPHome wM-Bus firmware that already includes the Hydrus and Sharky 774 drivers. Add your meter IDs (and keys, if needed) in the ESPHome dashboard. It reports to Home Assistant or MQTT, ships from the EU with no customs, and keeps the V4 free for exploring. Bring your own micro-USB cable and charger. Only buy it once step 1 shows your meters decode (see the meter section). SX1276 handles the long Hydrus telegrams. A budget version is the DIY CC1101 board below; it needs fine-pitch soldering.

Alternatives

DIY kit: green “CC1101 868MHz Module” + ESP32-C3 SuperMini (soldering needed) at AliExpress (Eyewink Store + HZWDONE Store): 121,76 kr (AliExpress standard (cart)) Low stock
LILYGO LoRa32 V2.1 / T3 V1.6.1, SX1276 868 MHz variant at AliExpress, LILYGO official store: 202,82 kr (AliExpress standard (product page)) In stock
IMST iU893A-XL wireless M-Bus USB stick (868 MHz, built-in antenna, S1/T1/C1) at IMST webshop (DE): €95.16 ≈ 711 kr (DHL Premium) In stock

€53.00 ≈ 396 kr

item €44.00 + shipping €9.00

3 in stock

Optional: a Pi to run receivers 24/7

Raspberry Pi 4 Model B 2GB

from raspberrypi.dk; PostNord to a parcel shop to Copenhagen
In stock Verified: product, photos, shipping

A Pi 4 2GB handles one or two dongles running ADS-B (readsb/tar1090), AIS-catcher, rtl_433 and wmbusmeters around the clock. The Zero 2 W is out of stock everywhere checked, and the Pi 5 2GB costs as much as the 4GB. Add the official 15 W USB-C supply (89 kr) to the same order. Each always-on band needs its own dongle, because one RTL dongle sees only 2.4 MHz at a time. The usual second dongle is the Nooelec SMArt v5 below with a cheap 1090 MHz antenna.

Alternatives

Nooelec NESDR SMArt v5, dongle only at amazon.de (sold by Nooelec, shipped by Amazon): 384,27 kr (free home delivery) In stock
FlightAware-branded 3 dBi 1090 MHz magnetic whip, SMA male (FLA-ANT2) at Berrybase (DE): €17.80 ≈ 133 kr (DHL Paket) Low stock
Raspberry Pi 5 4GB at Berrybase (DE): €128.40 ≈ 960 kr (DHL Paket) In stock

638 kr

item 599 kr + shipping 39 kr

på lager

Optional: LoRa and Meshtastic

Heltec WiFi LoRa 32 V4 (S3R2), EU868, OLED, antenna

from Hexaspot (NL); PostNL mailbox parcel, 3–5 days to Copenhagen
In stock Verified: product, photos, shipping

The current Heltec board, EU868 build, shipped from the Netherlands in 3–5 days. Flash Meshtastic from the browser and join the Copenhagen mesh. Two boards cost 428 kr if you want to message between them. Don't plan on it as your meter receiver: SX1262 support in the ESPHome wM-Bus component is marked “limited frame length”, and the V4's front end needs extra pin handling.

Alternatives

LILYGO T-Beam V1.2, 868 MHz, GPS, 18650 holder at amazon.de (sold by LILYGO, shipped by Amazon): 376,95 kr (free home delivery) In stock
Seeed XIAO ESP32S3 + Wio-SX1262 kit with case, 862–930 MHz at Berrybase (DE): €33.80 ≈ 253 kr (DHL Paket) Low stock

237 kr

item 191 kr + shipping 46 kr

in stock; dispatch 1–3 days

Optional: see local LoRaWAN traffic

Elecrow ThinkNode G1 indoor LoRaWAN gateway, SX1302, EU868, 8 channels, PSU + antenna

from Berrybase (DE); DHL Paket to Copenhagen
In stock Verified: product, photos, shipping

A real 8-channel SX1302 gateway, in stock in Germany, with power supply and antenna. It joins The Things Network or runs its own ChirpStack. You'll see metadata from nearby LoRaWAN sensors; payloads stay encrypted unless the devices are yours. Cheap single-channel ESP32 “gateways” are not supported by TTN.

Alternatives

Elecrow LR1302 SPI EU868 module + LR1302 Raspberry Pi HAT (Pi not included) at Berrybase (DE): €64.70 ≈ 484 kr (DHL Paket) In stock
Seeed SenseCAP M2 Multi-Platform LoRaWAN indoor gateway, EU868 at OpenELAB: €126.00 ≈ 942 kr (FedEx Regional Economy (free)) Pre-order

€99.80 ≈ 746 kr

item €89.90 + shipping €9.90

8 pcs; 5–7 Oct

Later upgrades, if the dongle leaves you wanting more

Not needed for anything on your list. Worth it for cleaner reception near strong transmitters or for serious shortwave.

↑

Later upgrade: cleaner VHF/UHF

Airspy Mini (24–1800 MHz, 12-bit, 6 MHz)

from ITEAD (Airspy's maker), EU warehouse in Germany; DHL from Germany, 3–6 days to Copenhagen
In stock Verified: product, photos, shipping

12-bit, 6 MHz wide, far less overload than an RTL dongle near strong FM and DAB transmitters. No HF.

Alternatives

Airspy Mini at FB Radio (SE): 1.198 kr (flat rate to Denmark) In stock

$138.98 ≈ 925 kr

item $99.00 + shipping $12.18 + DK VAT 25% (checkout) $27.80

246 in stock

↑

Later upgrade: HF to 2 GHz in one box

SDRplay RSP1B (1 kHz–2 GHz, 14-bit, 10 MHz)

from Eleshop (NL, Elektor's shop); UPS to Copenhagen
In stock Verified: product, photos, shipping

14-bit, 10 MHz, 1 kHz–2 GHz. The best all-rounder if shortwave matters. The SDRplay driver is closed source but runs on Mac, Linux and Pi; SDRplay's own store won't ship to the EU. No USB-B cable in the box.

Alternatives

SDRplay RSP1B at Passion Radio (FR): €172.80 ≈ 1.291 kr (relay point, 5–8 days) Low stock

€163.92 ≈ 1.225 kr

item €123.14 + shipping €8.00 + DK VAT 25% (basket) €32.78

in stock; ships next day

02Your meters: what to expect

Both meters are supported, but probably encrypted

The Diehl HYDRUS and SHARKY 774 send wireless M-Bus (OMS) on 868.95 MHz, modes T1/C1. wmbusmeters has drivers for both (hydrus, sharky774).
Payloads are normally AES-128 encrypted with a key per meter. When you don't give a key, wmbusmeters automatically tries Diehl's factory default key on Diehl frames. If Brunata kept the default, your readings decode with no key at all.
If decryption fails, you still see each meter's ID, manufacturer (DME), type and signal strength, but not the readings. Ask Brunata or your housing association for the keys; utilities often refuse.
HYDRUS telegrams are long (200–250 bytes). Avoid the nanoCUL stick (148-byte buffer) and treat SX1262 boards with caution. CC1101, SX1276, IMST sticks and RTL-SDR dongles all handle them.

Test plan once the V4 arrives

On the Mac: brew install rtl_433, then listen for wM-Bus:
```
rtl_433 -f 868.95M -s 1200k -R 104 -F json
```
Find your meters: match the IDs in the output to the serial numbers printed on the meters. Transmissions arrive every 14 s to a few minutes.
Decode: build wmbusmeters (Mac and Linux supported) and run wmbusmeters --analyze rtlwmbus, or point it at your meter IDs with no key. Readings mean the default key works.
If it decodes, buy the always-on receiver (pick 2), or run wmbusmeters on a Pi with the dongle. If it doesn't, request keys before buying anything meter-specific.

03The options compared

Prices are the cheapest verified delivered offer from section 05. An RTL dongle sees one 2.4 MHz slice at a time, so aircraft, ships and meters can't all be watched with a single dongle: every always-on band needs its own receiver.

Option	Delivered to DK	Coverage	Bandwidth at once	Software	Mac / Linux	Antennas	Ease	Main limits
RTL-SDR Blog V4	608 kr with dipoles · 496 kr dongle	0.5–1766 MHz; HF through a built-in upconverter	2.4 MHz, 8-bit	The largest: rtl_433, wmbusmeters, readsb, AIS-catcher, SDR++, SatDump, GNU Radio	Mac: SDR++, SDRangel, GQRX, rtl_433 (Homebrew librtlsdr 2.0.2). Linux/Pi: rtlsdrblog driver or current osmocom	Dipole kit covers VHF/UHF; a long wire for HF	Easy	Receive only; overloads near strong FM/DAB; one 2.4 MHz slice at a time; end-of-line
Nooelec SMArt v5 / RTL-SDR V3	384 kr · ≈351 kr	≈25–1750 MHz; HF only via direct sampling	2.4 MHz, 8-bit	Same as V4	Works with stock drivers everywhere	SMArt bundle includes 3 antennas	Easiest	Weak HF; SMArt has no bias tee; V3 ships from China (2–3 weeks)
ESP32 + CC1101 868 (DIY)	≈122 kr	868 MHz band packets (not an SDR)	One decoded channel	ESPHome wmbus component → Home Assistant	Flash from Mac or Linux; then standalone on Wi-Fi	Spring antenna on the board	Moderate: fine soldering, YAML	Single purpose; buy the green 868 board, not the blue 433 one
IoTLabs wM-Bus Gateway	≈396 kr	868 MHz wM-Bus T1/C1 (SX1276)	One decoded channel	ESPHome / wmbusmeters	Standalone on Wi-Fi	SMA antenna included	Easy	Single purpose; small seller (3 in stock)
ESP32 LoRa board (Heltec V4)	237 kr	863–870 MHz LoRa and FSK	One LoRa channel	Meshtastic, MeshCore, ESPHome	Web flasher in Chrome; standalone	Antenna included	Easy	Meshtastic and wM-Bus can't run at once; SX1262 frame-length limit for long meter telegrams
8-channel LoRaWAN gateway	746 kr	EU868 LoRaWAN	8 LoRa channels	The Things Network, ChirpStack	Standalone (Ethernet/Wi-Fi)	Included	Moderate	LoRa only; payloads encrypted unless the sensors are yours
Airspy Mini	≈925 kr	24–1800 MHz	6 MHz, 12-bit	SDR++, SDR#, SpyServer, GNU Radio	libairspy on Mac and Linux	Needs antennas (reuse the dipoles)	Easy	No HF; charged in USD
SDRplay RSP1B	≈1.225 kr	1 kHz–2 GHz	10 MHz, 14-bit	SDRconnect, SDR++ via SDRplay API	Mac, Linux, Pi (closed-source API)	Needs antennas	Easy	Closed driver; receive only
Airspy HF+ Discovery	≈1.508 kr	0.5 kHz–31 MHz and 60–260 MHz	≈0.66 MHz	SDR++, SDR#, SpyServer	Mac and Linux	Needs an HF antenna	Moderate	No 868 or 1090 MHz; narrow
ADALM-Pluto	≈2.074 kr	325 MHz–3.8 GHz (70 MHz–6 GHz with a widely used firmware tweak)	20 MHz, 12-bit, transmits	GNU Radio, SDRangel, SDR++	Mac and Linux (libiio)	Needs antennas	Moderate	No AIS without the tweak; price has roughly doubled since launch
HackRF Pro	≈3.503 kr	100 kHz–6 GHz	20 MSPS, transmits	GNU Radio, SDR++, URH	Mac and Linux	No antenna in the box	Moderate	Expensive; transmitting needs a licence outside licence-free bands; HackRF One discontinued
IMST iU893A-XL USB stick	≈711–747 kr	868 MHz wM-Bus S1/T1/C1	One decoded channel	wmbusmeters native (iu891a)	Any USB host	Built in	Easiest for wmbusmeters	Single purpose and pricey

04Coverage against local signals

Native coverageDegraded or modified (HF by direct sampling; Pluto firmware tweak)Signals worth receiving around Copenhagen

What's on the air

Copenhagen is a good place for this: a major airport, one of Europe's busiest straits, and a Meshtastic community.

Signal	Frequency	What you'll see from Copenhagen	Hardware	Software
Aircraft (ADS-B)	1090 MHz	Approaches and departures for Kastrup plus overflights; 150–300 km range with an outdoor antenna, less indoors	Any RTL dongle + 1090 antenna	readsb + tar1090 on a Pi; feeding FlightAware, FR24 or adsb.lol gets you free accounts
Ships (AIS)	161.975 / 162.025 MHz	Øresund traffic, ferries, harbour; best with a window or balcony view east	Any RTL dongle + VHF dipole (~46 cm arms)	AIS-catcher (Mac and Pi)
Your meters (wM-Bus)	868.95 MHz	Your Hydrus and Sharky plus neighbours' meters; every 14–256 s per Diehl's spec	RTL dongle, or an ESP32 868 receiver	rtl_433, wmbusmeters
433/868 MHz sensors	433.92, 868.3 MHz	Weather stations, thermometers, doorbells, tyre-pressure sensors	Any RTL dongle	rtl_433 → MQTT / Home Assistant
LoRa / Meshtastic	869.525 MHz (EU default)	About 125 Meshtastic nodes were counted around Copenhagen in one public write-up	Heltec or LILYGO board	Meshtastic app / web client
LoRaWAN	867–868.5 MHz	Metadata from nearby sensors; payloads are encrypted	8-channel gateway	TTN console, ChirpStack
FM and DAB+	87.5–108 / 174–240 MHz	DR and commercial multiplexes; RDS on FM	Any dongle	SDR++ (FM), welle.io (DAB+)
Airband	118–137 MHz AM	Kastrup tower, approach and ATIS	Any dongle; outdoor antenna helps	SDR++, GQRX
Amateur 2 m / 70 cm	144–146 / 430–440 MHz	APRS on 144.800, local repeaters	Any dongle	Direwolf (APRS), SDR++
Weather satellites	137.9 MHz	Meteor-M2 LRPT images. NOAA 15/18/19 APT ended in 2025.	Dongle + V-dipole or QFH, outdoors	SatDump (Mac and Pi)
Shortwave / HF ham	3–30 MHz	Broadcast, FT8 and more; apartment electrical noise is the main obstacle	V4 (upconverter), RSP1B or HF+ Discovery + long wire	SDR++, WSJT-X; online KiwiSDRs as a fallback

05All verified offers

Home and service-point delivery to Copenhagen 2300, cheapest first within each group. “Partly verified” says which part is missing, usually an AliExpress import charge estimated by the EU €3 rule because its checkout needs a sign-in.

General-purpose RTL-SDR dongles

Product and seller	Delivered total	Fulfilment	Stock	Verification and notes
Generic blue DVB-T stick, R820T2 variant (no TCXO, plastic) BitByg.dk	232,50 kr item 186,25 kr + shipping 46,25 kr	PostNord to a parcel shop Delivery to a parcel shop / service point · Copenhagen 2300	In stock in stock	Verified: product, photos, shipping Choose “Blå Model R820T2”. Cheapest Danish-shop SDR; no TCXO, so frequency drifts and needs a ppm correction.
RTL-SDR Blog V3 (R860, 1 ppm TCXO, bias tee), dongle only, USB-A AliExpress, official RTLSDRBlog Store	351,20 kr item 323,20 kr + shipping 0 + EU import duty + VAT (≈28 kr, estimated by the €3 rule) 28 kr	free shipping (AliExpress) Home delivery · Copenhagen 2300	In stock 351 available; arrives 13–27 Oct	Partly verified Shipping read on the product page; import charge estimated, checkout needs sign-in.
Nooelec NESDR SMArt v5, dongle only amazon.de (sold by Nooelec, shipped by Amazon)	384,27 kr item 384,27 kr + shipping 0	free home delivery Home delivery · Copenhagen 2300	In stock in stock; arrives Thu 8 Oct	Verified: product, photos, shipping
Nooelec NESDR Nano 2+ (MCX input) amazon.de (sold by Nooelec, shipped by Amazon)	407,97 kr item 407,97 kr + shipping 0	free home delivery Home delivery · Copenhagen 2300	In stock in stock; arrives 8 Oct	Verified: product, photos, shipping
“USB RTL-SDR Stick RTL2832 + R820T” (listing claims 1 ppm TCXO, bias tee) BM-Radio.dk (Odense)	445 kr item 399 kr + shipping 46 kr	GLS to a parcel shop Delivery to a parcel shop / service point · Copenhagen 2300	Low stock stock not stated; 3–5 days if not in stock	Partly verified TCXO and tuner claimed in text only; the photo is a generic plastic stick.
Nooelec NESDR SMArt v5 Bundle (dongle + 3 antennas; 0.5 ppm TCXO, no bias tee) amazon.de (sold by Nooelec, shipped by Amazon)	462,90 kr item 462,90 kr + shipping 0	free home delivery Home delivery · Copenhagen 2300	In stock in stock; arrives Thu 8 Oct	Verified: product, photos, shipping
RTL-SDR Blog V4 (R828D), dongle only Electrokit (SE, authorised reseller)	749 SEK ≈ 496 kr item 649 SEK + shipping 100 SEK	DHL Parcel Connect to a service point Delivery to a parcel shop / service point · Copenhagen 2300	In stock 158 pcs; 1–3 days	Verified: product, photos, shipping
RTL-SDR Blog V4 (R828D) + official Multipurpose Dipole Kit Electrokit (SE, authorised reseller)	918 SEK ≈ 608 kr item 818 SEK + shipping 100 SEK	DHL Parcel Connect to a service point Delivery to a parcel shop / service point · Copenhagen 2300	In stock V4: 158 pcs, kit: 14 pcs; 1–3 days	Verified: product, photos, shipping Two SKUs in one basket: dongle 649 SEK + dipole kit 169 SEK (link). Last-batch V4 stock; the model reached end-of-line on 2026-05-14.
RTL-SDR Blog V4 (R828D), dongle only Astroradio (ES, authorised reseller)	€82.07 ≈ 613 kr item €58.08 + shipping €23.99	GLS home delivery Home delivery · Copenhagen 2300	In stock in stock, immediate dispatch	Verified: product, photos, shipping Basket showed Spanish 21% VAT; final checkout could switch to DK 25%.
RTL-SDR Blog V4 (R828D), dongle only HamRadioShop.it (IT, authorised reseller)	647 kr item 547 kr + shipping 100 kr	MBE Standard home delivery Home delivery · Copenhagen 2300	Low stock last units	Verified: product, photos, shipping
FlightAware Pro Stick Plus (1090 MHz filter + LNA) The Pi Hut (UK)	£84.69 ≈ 744 kr item £54.69 + shipping £30.00	DHL Express (only rate offered) Home delivery · Copenhagen 2300	In stock in stock	Verified: product, photos, shipping UK shipment; DK VAT collected via IOSS. Too expensive for what it does: a V3/SMArt dongle plus a 1090 MHz antenna gives the same result for less.

Wireless M-Bus receivers

Product and seller	Delivered total	Fulfilment	Stock	Verification and notes
DIY kit: green “CC1101 868MHz Module” + ESP32-C3 SuperMini (soldering needed) AliExpress (Eyewink Store + HZWDONE Store)	121,76 kr item 45,39 kr + shipping 20,37 kr + EU import duty for 2 item types (≈28–56 kr, estimated) 56 kr	AliExpress standard (cart) Home delivery · Copenhagen 2300	Low stock CC1101: 8 left; C3: limit 1 per buyer; 11–18 Oct	Partly verified Basket verified at 65.76 kr; the import duty needs a signed-in checkout. Total shown at the worst case. ESP32-C3 SuperMini: link Don't buy the blue SMA “315/433/868/915” CC1101 boards: they are 433 MHz parts.
LILYGO LoRa32 V2.1 / T3 V1.6.1, SX1276 868 MHz variant AliExpress, LILYGO official store	202,82 kr item 174,48 kr + shipping 0,34 kr + EU import duty + VAT (≈28 kr, estimated) 28 kr	AliExpress standard (product page) Home delivery · Copenhagen 2300	In stock 319 available; 12–18 Oct	Partly verified Variant and 0.34 kr shipping verified in the guest cart; import charge estimated (checkout needs sign-in). Box: board with 0.96" OLED, LoRa antenna, power lead, headers. Same SX1276 radio as the IoTLabs gateway, but you write the ESPHome config yourself (pin remap untested).
IoTLabs wM-Bus Gateway (ESP32 + SX1276 868 MHz, T1/C1, OLED, SMA antenna) IoTLabs via Lectronz (PL, ships from the EU)	€53.00 ≈ 396 kr item €44.00 + shipping €9.00	postal home delivery Home delivery · Copenhagen 2300	Low stock 3 in stock	Verified: product, photos, shipping Heltec LoRa32 V2 (SX1276) in a 3D-printed case, pre-flashed with ESPHome wM-Bus firmware that includes the hydrus and sharky774 drivers. Micro-USB power; no USB cable mentioned. Firmware: link
IoTLabs wM-Bus Gateway (same board) IoTLabs via Tindie	$60.00 ≈ 399 kr item $49.00 + shipping $11.00	DPD from Poland Home delivery · Copenhagen 2300	Low stock 9 left	Verified: product, photos, shipping Shipping from Tindie's published rate table for DK.
IMST iU893A-XL wireless M-Bus USB stick (868 MHz, built-in antenna, S1/T1/C1) IMST webshop (DE)	€95.16 ≈ 711 kr item €59.00 + shipping €20.97 + German 19% VAT (basket) €15.19	DHL Premium Home delivery · Copenhagen 2300	In stock ships 6–9 Oct	Partly verified Basket €95.16 with German 19% VAT; ≈€99.96 if DK 25% VAT is applied at checkout.
Würth AMB8465-M (Metis-I) wM-Bus USB stick — not for new designs DigiKey DK	797,55 kr item 797,55 kr + shipping 0	free over 550 kr (banner) Home delivery · Copenhagen 2300	In stock 85 in stock	Partly verified Free shipping from DigiKey's banner, checkout not entered.

LoRa / Meshtastic boards (EU868)

Product and seller	Delivered total	Fulfilment	Stock	Verification and notes
Heltec WiFi LoRa 32 V3, EU868 Hexaspot (NL)	222 kr item 176 kr + shipping 46 kr	PostNL mailbox parcel Home delivery · Copenhagen 2300	In stock in stock	Verified: product, photos, shipping Shipping from the cart estimate.
LILYGO T3-S3, SX1262 868 MHz, SMA antenna AliExpress, LILYGO official store	232,53 kr item 195,74 kr + shipping 8,79 kr + EU import duty + VAT (≈28 kr, estimated) 28 kr	AliExpress standard (product page) Home delivery · Copenhagen 2300	In stock 58 available; 12–18 Oct	Partly verified Import charge estimated; checkout needs sign-in.
Heltec WiFi LoRa 32 V4 (S3R2), EU868, OLED, antenna Hexaspot (NL)	237 kr item 191 kr + shipping 46 kr	PostNL mailbox parcel, 3–5 days Home delivery · Copenhagen 2300	In stock in stock; dispatch 1–3 days	Verified: product, photos, shipping Two boards: 382 + 46 = 428 kr.
Seeed XIAO ESP32S3 + Wio-SX1262 kit with case, 862–930 MHz Berrybase (DE)	€33.80 ≈ 253 kr item €23.90 + shipping €9.90	DHL Paket Home delivery · Copenhagen 2300	Low stock 4 in stock	Verified: product, photos, shipping
Heltec WiFi LoRa 32 V3 “863-928”, 2 pcs AliExpress, Heltec IOT Store (reseller)	320,27 kr (160 kr per board) item 292,27 kr + shipping 0 + EU import duty + VAT (≈28 kr, estimated) 28 kr	free shipping Home delivery · Copenhagen 2300	In stock 900+; 13–27 Oct; sale ends 7 Oct	Partly verified Import charge estimated.
LILYGO T-Beam V1.2, 868 MHz, GPS, 18650 holder amazon.de (sold by LILYGO, shipped by Amazon)	376,95 kr item 376,95 kr + shipping 0	free home delivery Home delivery · Copenhagen 2300	In stock in stock; arrives 8 Oct	Verified: product, photos, shipping
Heltec V3.1 868 MHz, 2-pack amazon.de (Sparkleiot-DE, shipped by Amazon)	455,21 kr (228 kr per board) item 455,21 kr + shipping 0	free home delivery Home delivery · Copenhagen 2300	In stock in stock; arrives 8 Oct	Verified: product, photos, shipping

LoRaWAN gateways (8-channel, EU868)

Product and seller	Delivered total	Fulfilment	Stock	Verification and notes
Elecrow LR1302 SPI EU868 module + LR1302 Raspberry Pi HAT (Pi not included) Berrybase (DE)	€64.70 ≈ 484 kr item €54.80 + shipping €9.90	DHL Paket Home delivery · Copenhagen 2300	In stock 25 / 23 pcs	Verified: product, photos, shipping HAT: link
Seeed WM1302 SPI EU868 + WM1302 Pi HAT + antenna kit (Pi not included) OpenELAB (EU stock, Munich)	€69.78 ≈ 522 kr item €61.83 + shipping €7.95	FedEx Regional Economy Home delivery · Copenhagen 2300	In stock 3–5 days	Verified: product, photos, shipping
Elecrow ThinkNode G1 indoor LoRaWAN gateway, SX1302, EU868, 8 channels, PSU + antenna Berrybase (DE)	€99.80 ≈ 746 kr item €89.90 + shipping €9.90	DHL Paket Home delivery · Copenhagen 2300	In stock 8 pcs; 5–7 Oct	Verified: product, photos, shipping
RAK5146 PiHAT kit, no GPS, EU868 (SX1303) RAKwireless official store (ships from China, duties paid)	$115.60 ≈ 770 kr item $100.00 + shipping $15.60	CN-EU Express Line, duties paid, 15–20 days Home delivery · Copenhagen 2300	In stock available	Verified: product, photos, shipping
Seeed SenseCAP M2 Multi-Platform LoRaWAN indoor gateway, EU868 OpenELAB	€126.00 ≈ 942 kr item €126.00 + shipping 0	FedEx Regional Economy (free) Home delivery · Copenhagen 2300	Pre-order pre-order: dispatch in 10–20 days	Verified: product, photos, shipping
MikroTik wAP LR8G kit, 868 MHz Proshop.dk	943 kr item 904 kr + shipping 39 kr	PostNord home delivery Home delivery · Copenhagen 2300	Not in stock ordered in (Bestillingsvare), 8–9 days; 0 in Copenhagen	Verified: product, photos, shipping
RAK WisGate Edge Lite 2 (RAK7268V2) EU868, no LTE RAKwireless official store	$173.64 ≈ 1.156 kr item $154.00 + shipping $19.64	CN-EU Express Line, duties paid Home delivery · Copenhagen 2300	In stock available	Verified: product, photos, shipping

Upgrade SDRs

Product and seller	Delivered total	Fulfilment	Stock	Verification and notes
Airspy Mini (24–1800 MHz, 12-bit, 6 MHz) ITEAD (Airspy's maker), EU warehouse in Germany	$138.98 ≈ 925 kr item $99.00 + shipping $12.18 + DK VAT 25% (checkout) $27.80	DHL from Germany, 3–6 days Home delivery · Copenhagen 2300	In stock 246 in stock	Verified: product, photos, shipping Charged in US dollars by card; your card may add an FX fee.
Airspy Mini FB Radio (SE)	1.198 kr item 1.129 kr + shipping 69 kr	flat rate to Denmark Home delivery · Copenhagen 2300	In stock in stock	Verified: product, photos, shipping
SDRplay RSP1B (1 kHz–2 GHz, 14-bit, 10 MHz) Eleshop (NL, Elektor's shop)	€163.92 ≈ 1.225 kr item €123.14 + shipping €8.00 + DK VAT 25% (basket) €32.78	UPS Home delivery · Copenhagen 2300	In stock in stock; ships next day	Verified: product, photos, shipping No USB-B cable in the box.
SDRplay RSP1B Passion Radio (FR)	€172.80 ≈ 1.291 kr item €161.32 + shipping €11.48	relay point, 5–8 days Delivery to a parcel shop / service point · Copenhagen 2300	Low stock 5 in stock	Verified: product, photos, shipping
Airspy HF+ Discovery (0.5 kHz–31 MHz, 60–260 MHz) ITEAD, EU warehouse	$226.48 ≈ 1.508 kr item $169.00 + shipping $12.18 + DK VAT 25% (checkout) $45.30	DHL from Germany Home delivery · Copenhagen 2300	In stock 313 in stock	Verified: product, photos, shipping
Airspy R2 (24–1800 MHz, 10 MHz) ITEAD, EU warehouse	$226.48 ≈ 1.508 kr item $169.00 + shipping $12.18 + DK VAT 25% (checkout) $45.30	DHL from Germany Home delivery · Copenhagen 2300	In stock 215 in stock	Verified: product, photos, shipping
ADALM-Pluto (Analog Devices; 325 MHz–3.8 GHz, TX/RX, 20 MHz) DigiKey DK (ships from the US, duties paid)	2.074,06 kr item 1.659,25 kr + shipping 0 + DK VAT 25% (computed) 414,81 kr	free (UPS/FedEx/DHL) Home delivery · Copenhagen 2300	In stock 1,241 in stock	Partly verified Free shipping in cart (1,659.25 kr ex VAT); 25% VAT added by calculation, checkout not reached.
SDRplay RSPdx-R2 (1 kHz–2 GHz, 3 antenna ports) Eleshop (NL)	€281.69 ≈ 2.105 kr item €217.35 + shipping €8.00 + DK VAT 25% (computed) €56.34	UPS Home delivery · Copenhagen 2300	In stock in stock	Partly verified Flat €8 + VAT shipping seen in a two-item basket; the RSPdx-only total is computed.
HackRF Pro (Great Scott Gadgets; 100 kHz–6 GHz, TX/RX, 20 MSPS) Antratek (NL, listed GSG reseller)	€468.75 ≈ 3.503 kr item €468.75 + shipping 0	free GLS Home delivery · Copenhagen 2300	In stock in stock	Verified: product, photos, shipping No antenna or cable included. HackRF One is discontinued.

Antennas

Product and seller	Delivered total	Fulfilment	Stock	Verification and notes
Waveshare LPWA LoRa antenna 833–903 MHz, 2 dBi, SMA male (WS-24415) Berrybase (DE)	€12.40 ≈ 93 kr item €2.50 + shipping €9.90	DHL Paket (free from €150) Home delivery · Copenhagen 2300	In stock 90 in stock	Verified: product, photos, shipping €2.50 add-on to any Berrybase order.
FlightAware-branded 3 dBi 1090 MHz magnetic whip, SMA male (FLA-ANT2) Berrybase (DE)	€17.80 ≈ 133 kr item €7.90 + shipping €9.90	DHL Paket Home delivery · Copenhagen 2300	Low stock 2 in stock	Verified: product, photos, shipping
Official RTL-SDR Blog Multipurpose Dipole Kit (on its own) Passion Radio (FR)	€26.34 ≈ 197 kr item €15.06 + shipping €11.28	relay point Delivery to a parcel shop / service point · Copenhagen 2300	In stock in stock	Verified: product, photos, shipping
GNS TEN-90 1090 MHz ADS-B antenna, ~6 dB, SMA female amazon.de (GNS24, shipped by Amazon)	€52.41 ≈ 392 kr item €52.41 + shipping 0	free home delivery Home delivery · Copenhagen 2300	In stock 15 left; 8 Oct	Verified: product, photos, shipping Needs an SMA male–male cable.
FlightAware 1090 MHz 26" 5.5 dBi, N-female (FLA-ANT1) + 5 m N→SMA cable Berrybase (DE)	€87.90 ≈ 657 kr item €78.00 + shipping €9.90	DHL Paket Home delivery · Copenhagen 2300	Low stock antenna 9, cable 1 in stock	Verified: product, photos, shipping Cable: link
Albrecht Sky Band SE 900 discone, 25–1300 MHz (SO-239, mast mount) amazon.de (sold and shipped by Amazon)	€96.61 ≈ 722 kr item €96.61 + shipping 0	free home delivery Home delivery · Copenhagen 2300	Low stock 7 left	Verified: product, photos, shipping Outdoor/balcony. Needs coax and a PL-259→SMA adapter.
WiMo Desktop Discone 18065, 25–2000 MHz, BNC, magnetic base WiMo (DE)	€115.78 ≈ 865 kr item €99.00 + shipping €16.78	GLS Home delivery · Copenhagen 2300	In stock ships in 1–2 days	Partly verified Basket showed German 19% VAT; ≈€120.77 if DK VAT is applied.

Raspberry Pi hosts

Product and seller	Delivered total	Fulfilment	Stock	Verification and notes
Raspberry Pi 4 Model B 2GB raspberrypi.dk	638 kr item 599 kr + shipping 39 kr	PostNord to a parcel shop Delivery to a parcel shop / service point · Copenhagen 2300	In stock på lager	Verified: product, photos, shipping Official 15 W USB-C PSU: 89 kr (link).
Raspberry Pi 5 4GB Berrybase (DE)	€128.40 ≈ 960 kr item €118.50 + shipping €9.90	DHL Paket Home delivery · Copenhagen 2300	In stock 100+; 5–7 Oct	Verified: product, photos, shipping
Raspberry Pi 5 4GB raspberrypi.dk	988 kr item 949 kr + shipping 39 kr	PostNord to a parcel shop Delivery to a parcel shop / service point · Copenhagen 2300	In stock på lager	Verified: product, photos, shipping

06Copenhagen pickup

Ranked separately from delivery. Only Proshop has anything relevant, and nothing in it is collectable in Copenhagen today:

MikroTik wAP LR8G kit, 868 MHz at Proshop.dk: 904 kr, Copenhagen shop pickup — 0 DKK (assumed per user preference). Not in stock ordered in, 8–9 days; 0 in Copenhagen
Raspberry Pi 5 2GB at Proshop.dk: 957 kr, Copenhagen shop pickup — 0 DKK (assumed per user preference). Not in stock on order, expected 13 Oct; 0 in Copenhagen
The official Raspberry Pi 27 W power supply at Proshop: 108 kr, Copenhagen shop pickup — 0 DKK (assumed per user preference), collectable Tuesday after 12:00.

07Unverified leads

Not ranked: shipping or the product match couldn't be confirmed.

Raspberry Pi Zero 2 W, raspberrypi.dk 159 kr. Out of stock here and at Berrybase and Kiwi; Komplett lists it as ordered-in. Fine for a single wM-Bus or rtl_433 dongle once it's back.
LOH Electronics (SE): RTL-SDR Blog V4 + dipole kit 649 SEK (≈430 kr), V4 dongle 549 SEK. Authorised reseller, last batch. Shipping to DK is quoted only after a full address. Item price + shipping unverified; delivered total unknown. Could beat Electrokit if their DK shipping is under ~180 kr.
Pajenicko.cz: RTL-SDR Blog V4 1,499 CZK, V4 + dipole kit 1,999 CZK. Authorised Czech reseller. Shipping to DK not checked; useful if you are buying in Czechia anyway.
RTL-SDR Blog V4L, official eBay ($37.95 + $3). Genuine V4 successor; DK VAT/duty not shown; 4–8 week delivery. Mac drivers lag for the V4L.
Passion Radio RTL-SDR Blog V4L €52.00 / €61.38 with antennas. Out of stock, “available within a month”. EU-shipped.
amazon.de CC1101 868 MHz green board B0CLLZWV7K (€5.71) + ESP32-C3 SuperMini 2-pack B0DMNBWTFD (€9.44). Shipping unverified; delivered total unknown (free only on a first order).
Heltec direct: WiFi LoRa 32 V4 863–870, $19.90 + $15 shipping. Ships from China without tax; DK VAT and handling fee on top; delivered total unknown.
Lab401 HackRF Pro 3,812.50 kr. Shipping needs a full address; delivered total unknown.
Elektor HackRF Pro €429 (pre-order, back in October). Cheaper than Antratek if it ships; shipping unverified.
Limmared (SE) SDRplay RSP1B 2,095 SEK. Search snippet only.
iot-shop.de SenseCAP M2 €101.03 + DHL Express €29.90. Checkout needs a full address; delivered total estimated ≈€143.

08Rejected listings

RTL-SDR Blog V4 listings on PriceRunner.dk (OnBuy marketplace, 842–1,503 kr): Marketplace resellers at 2–3× the normal price; some titles say “V4 R820T2”, which is contradictory.
sdrstore.eu (HackRF, Pluto, RTL-SDR): Anonymous seller, not an authorised RTL-SDR reseller; V4 discontinued there; HackRF/Pluto items are Chinese clones or “compatible” boards; ~2× official prices.
AliExpress “RTL-SDR V4/V2 R828D” (HTOOL KT Store): Headline price is the FC0012 V2 variant; the V4 option is not from the official store. Likely fake.
AliExpress “Latest V4 … R860” (HTOOL): A V3 tuner sold as a V4.
AliExpress “V4 … HF Direct Sampling”: The real V4 uses an upconverter, not direct sampling. Clone.
amazon.de “NooElec NESDR SMArt” B0DPCWMG96 (324 kr): Brand field Fafeicy, seller Luoyuuk, generic black stick in the photo. Mislabelled.
amazon.de RTL-SDR Blog V4 dongle / kit: Currently unavailable, no other sellers (V4 end-of-line).
amazon.de RTL-SDR Blog V3 B0BMKZCKTF: Cannot be shipped to Denmark.
FlightAware Pro Stick Plus, FlightAware store ($45.99): No shipping rates to Denmark.
Blue SMA “CC1101 315/433/868/915” boards on AliExpress: Sold only as 433 MHz parts (Ebyte E07-M1101D-SMA is 387–464 MHz); reviews tag “incorrect frequency”.
nanoCUL CC1101 868 M-Bus USB stick (amazon.de, €57.66): The listing itself says it does not work with Diehl Hydrus (148-byte buffer; Hydrus telegrams are 200–250 bytes).
IMST iM871A-USB: Discontinued; no longer in IMST's shop.
HackRF One (genuine): Discontinued and replaced by HackRF Pro; out of stock at Passion Radio, Elektor and DigiKey.
HackRF “H2” clone on AliExpress (≈545 kr): Chinese R9/R10-style clone, not Great Scott Gadgets hardware.
SDRplay official store (RSP1B £105.80 ex VAT): Will not ship to Denmark or the EU.
Funktechnik Dathe RSP1B (€155): Only shop pickup in Germany offered for Denmark.
Moonraker EU RSP1B (€195.34 delivered): €41.65 shipping to Denmark.
amazon.de SenseCAP M2 B0CLDFC6VJ (1,562 kr): US915 version. Wrong band.
Elecrow ThinkNode M7 (OpenELAB, €62.98): LR1110 single transceiver, not an 8-channel concentrator.
Kiwi Electronics SenseCAP M2 EU868: Out of stock; €158.11 + €18.75.
Clone “ESP32 LoRa V3/V4” boards on amazon.de (RUIZHI, Heemol, YELUFT): Not genuine Heltec; free delivery only on a first order.
amazon.de “FlightAware 1090 MHz antenna 5.5 dBi” (Sanyunshangmao, €89.70): Likely clone from a third-party seller; the genuine antenna is €64.90 at Berrybase.
amazon.de D3000N discone (€210.32): Cannot ship to Denmark.

09Things to know

Buy now or wait?

Buy the V4 now: it is end-of-line, authorised resellers describe their stock as the last batch, and the cheapest listings have already gone. Neither geizhals nor idealo tracks these radios, so there's no price history. One signal: prices are rising. The FlightAware stick went from $20.95 to $45.99, and the ADALM-Pluto has roughly doubled since launch. amazon.de has Prime Deal Days on 6–7 October, which may cut the Nooelec prices.

Rules in Denmark (not legal advice)

Receiving unencrypted radio is generally allowed. Straffeloven §263 makes it an offence to secretly listen to or record conversations between other people, so don't record or share private voice traffic. Don't try to break encryption. Transmitting from a HackRF or Pluto needs an amateur licence from SDFI, except within licence-free bands such as 868 MHz under their power and duty-cycle limits.

Spotting a fake RTL-SDR Blog V4

Buy only from the official RTL-SDR Blog Amazon, eBay and AliExpress accounts or the resellers on rtl-sdr.com. Warning signs on a listing include a flat case, four screws per side, a coloured case or “Pro” branding, no NSY QC sticker, and HF described as “direct sampling”. After end-of-line, marketplace “V4” listings are almost all clones.

Brunata Online

If your building uses Brunata Online, the portal already shows your consumption, at lower resolution. The community Home Assistant integration (ha-brunata) is marked as not working yet, so radio is the practical route to live data.

10Rerun playbook

This research leaves a rerun file at sessions/2026-10-04-sdr-radio-hardware/sources.py. To refresh prices without redoing the research, run:

python3 scripts/rerun.py run sessions/2026-10-04-sdr-radio-hardware

Then read rerun/digest.md. AliExpress, the Electrokit checkout and the LOH Electronics quote are manual tasks. Things to check next time: whether LOH's Danish shipping makes it the cheapest V4 kit; when the V4L returns to EU stock and its macOS support; and whether Brunata uses the factory default key.

Sources: seller pages and baskets listed above (screenshot evidence kept with the local research files); RTL-SDR Blog V4 guide; wmbusmeters source (Diehl default-key handling in src/manufacturer_specificities.cc); SzczepanLeon ESPHome components; Ebyte E07-M1101D-SMA spec; TTN on single-channel gateways; Copenhagen Meshtastic node count; NOAA APT end. Researched 2026-10-04.