What I would like to achieve is to use an electronic shelf label as a wireless LCD display.
This is what I’m talking about (attachment esl.jpg):
These could make awesome little wireless data displays. An IR transmitter on an arduino could sent data and update them.
- Reverse engineer the protocol
- Program the protocol into an arduino
- Sent data to display
Fast infrared communication
Diffuse infrared light (880 nm wave length) is used for wireless communication with the labels. The protocol is proprietary…
The first and (I guess) biggest challenge is to reverse engineer the protocol. What I can do is try to pick up the IR signal when a single label is programmed. I can vary some known parameters and compare the signals sent.
But… how to pick up the signal. I’m limited to a smartphone, an HTC One with an IR transceiver.
My first question would be: Will this app help me in finding out the protocol ? Does anyone have any other suggestions ?