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Smarkant - Convert your IKEA Bekant table into an IoT device
This work extends the [
project from [
), who reverse engineered
the controller board of an
adjustable table. He added an Arduino board and four buttons to the controller,
so that you can store two table positions and easily recall them.
You can find Robin's work in his
) shows his project
development and the operation of the modified table.
In the Smarkant project i added an ESP-12E to the ATmega328P and communication
between the ESP8266 and the ATmega328P is done through I2C (I first tried to compile
the Arduino code targeting the ESP8266 platform, but since the LIN bus code
directly accesses the ATmega hardware, i've canceled this approach). The ESP8266
gives us WiFi and quite some processing power to implement a REST API to control
our table remotely. This REST interface could be used to implement a smartphone
app or a desktop widget for controlling the table. We could also implement a web
app directly on the ESP8266.
In this project the ESP8266 establishes an MQTT connection to the Amazon IoT
backend and listens for changes to the Smarkant device shadow object.
This project also contains an Alexa skill and an AWS Lamda function that sends
a REST message to the AWS IoT device which in turn sends a message to the table.
This allows us to control the table with voice commands (one can certainly argue
about whether this is more convenient than pressing a button).
The following image shows an overview of this system architecture: