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.
IKEA Sparsnäs enegry monitor
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Re: IKEA Sparsnäs enegry monitor
+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"
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"
Last edited by Gamester17 on 18 Jan 2018, 15:13, edited 2 times in total.
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Re: IKEA Sparsnäs enegry monitor
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
https://github.com/bphermansson/EspSparsnasGateway
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Re: IKEA Sparsnäs enegry monitor
This developer have also posted documentation on the protocol used by Ikea Sparnäs:
https://github.com/kodarn/Sparsnas
https://github.com/kodarn/Sparsnas
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