IKEA Sparsnäs enegry monitor

[ankan]

Found decoding information by strigeus at GitHub https://github.com/strigeus/sparsnas_decoder.

How about adding support to it as I guess the sensor is available all over the world at IKEA.

[Gamester17]

+1 request for IKEA Sparsnäs (Ikea Sparsnas) electricity meter with wireless display

http://www.ikea.com/se/sv/catalog/products/90292645/

At least in Sweden these are often on sale every so often with a large rebate via IKEA FAMILY and as such they can also be found relativly cheap from rebate scalpers on eBay (and its Tradera action-site in Sweden) following closely aften a sale.

http://www.ikea.com/se/sv/manuals/spars ... 1480-1.pdf

"SPARSNÄS energy display assists you to monitor the total usage of electricity in your home. The energy display consists of a transmitter and a display. The transmitter, which you attach to your electricity meter, continuously registers the usage of electricity and transfers the data wireless to the display. Place the display where it becomes a natural part of daily life in your home"

Again, there is an open source RTL-SDR decoder and parser for it:

https://github.com/strigeus/sparsnas_decoder

"SPARSNÄS uses a CC1101 chip configured for GFSK modulation at 868MHz. The two FSK symbol frequencies once downconverted to baseband are roughly 67kHz and 105kHz. (EDIT: It seems like with a different RTL-SDR the baseband frequencies are 12.5khz and 50khz. Maybe my first RTL-SDR was inaccurate). The packet length is 18 bytes, including the length byte, and a 16-bit CRC is appended to the end. The CC1101 sync word is 0xD201. The packet payload byte 5 to 17 are encrypted using a key derived from the sender device's ID. The encryption key is a repeating XOR key"

tubalainen also has a fork of the above RTL-SDR project which convert and output as JSON to be used to pipe data to MQTT broker:

https://github.com/tubalainen/sparsnas_decoder

"The packet data is encrypted using your sender's ID. The sender ID is the last 6 digits of the serial number located under the battery."

"A BIG thanks to the https://www.facebook.com/groups/SHgruppen on Facebook"

[Gamester17]

Here is another SDR project for it that is designed for ESP8266 (NodeMcu) and an RFM69 868MHz or 915MHz RF Transceiver module

https://github.com/bphermansson/EspSparsnasGateway

[Gamester17]

This developer have also posted documentation on the protocol used by Ikea Sparnäs:

https://github.com/kodarn/Sparsnas