Home automation usually relies on short-range wireless standards such as Bluetooth LE, Zigbee, or WiFi, sometimes with the help of repeaters for larger houses. But if you need to monitor large houses, several houses on a piece of land, or apartments, you’d be glad that you can also do so, at least for doors and windows, with LoRaWAN using Dragino LDS02 sensor.
The LDS02 sensor will work like your typical wireless door/window sensor, detection when those are opened and closed, and for how long, but will offer a much longer range of up to 2km in urban settings, as well as battery life meaning it could last for years depending on the frequency of door/window events, as well as uplink frequency configuration.
Dragino LDS02 LoRaWAN door sensor specifications:
- Based on SX1262 LoRa transceiver
- LoRaWAN v1.0.3 Class A
- Bands – CN470, EU433, KR920, US915, EU868, AS923, AU915, IN865
- Door Open/Close detection & statistics
- Uplink on intervals and open/close events
- Downlink to change configuration through AT Commands
- Open duration alarm (the device will send an alarm if the door and window have been open over a specified time)
- Power Supply – 2x AAA batteries good up 16,000 to 70,000 uplink packets
- Dimensions – 69.2 x 29.2 x 15 mm; installation gap should be under 25mm
- Weight – 50 grams
Dragino says each LDS02 is pre-loaded with a set of unique keys for LoRaWAN registration, so users can easily register the keys to the LoRaWAN server and it will auto-connect after power on. Documentation can be found on the Dragino website with a “datasheet” which happens to be a one-page product brief, as well as a much more useful user manual that explains how to connect the sensor to The Things Network via Dragino LG308 gateway, but you could obviously use your own LoRaWAN gateway.
I first found out about the Dragino LDS02 LoRaWAN door & window sensor on Seeed Studio where it is sold for $18 with either an 868 MHz or 915 MHz radio, but you’ll also find it on Tindie and Aliexpress.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.
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Not a bad price for a presumably lorawan certified device. What micro does it use? What is the real world range?
Based on SX1262 LoRa transceiver
I can’t see the exact part number, but there’s an ASR marking on the board.(That’s LDS01, but LDS02 is supposed to use the same)
https://wiki.dragino.com/index.php?title=Firmware_Upgrade_Instruction
That should be from ASR Microelectronics
ASR6501/ASR60502 SiP are used in other LoRaWAN solutions as well.
Those are chips that are based on PSoC 4000 series ARM Cortex M0+ and Semtech SX1262 transceiver.
It’s supported by Platform.io: https://docs.platformio.org/en/stable/platforms/asrmicro650x.html
Here is clear pictures of the inside – https://fccid.io/ZHZLDS02/Internal-Photos/Internal-Photos-5694929.pdf
Good price, but the shipping on any of these to the US is absolutely insane.
For me it is $52