IKEA Ansluta MQTT bridge

Control your IKEA Ansluta 12V transformers remotely.

This code impersonates an IKEA Ansluta Remote.

Originally written by ksjoberg @ github in December 2018.

Runs on a NodeMCU build checked out on 1st December 2018, built by nodemcu-build.com using the bit, file, GPIO, MQTT, net, node, SPI, timer, UART and WIFI modules.

Wiring it up

I used a CC2500 breakout module from ebay and hooked it up to a D1 Mini NodeMCU-compatible board, also ebay

The SPI part of the wiring is already defined in the NodeMCU documentation. I decided to go for interrupt driven RX, so I wired GDO0 and GDO2 to the NodeMCU. This is the wiring table:

Signal	IO index	ESP8266 pin	CC2500 pin
HSPI CLK	5	GPIO14	SCL
HSPI /CS	8	GPIO15	CSn
HSPI MOSI	7	GPIO13	MOSI
HSPI MISO	6	GPIO12	MISO
CHIP_RDYn	2	GPIO4	GDO2
RX_RDY	1	GPIO5	GDO0

Usage

1. set up WiFi connection, MQTT topic etc. in config.lua
2. upload the respecive lua files to your device
3. run it; a restart will suffice since the init.lua launches it automatically.
4. Subscribe to the ikea-ansluta-bridge/+/+/current topic to receive updates from the regular round remotes.
5. Publish to ikea-ansluta-bridge/chipid/remoteid/set with a message corresponding to your required dim level. Only three levels are supported by the transformers: 0%, 50% and 100%. Replace chipid with your NodeMCU's Chip ID, and the remoteid with the Remote's ID that you want to send a message as.
6. If you want to attempt pairing, make up a Remote ID of your choice (16 bit hexadecimal value) and issue a dimming request setting the value to -1. (Untested)