Our security research developed two Android applications (emitter and receiver) that will attempt data exfiltration by modifying the smart bulb's color and warm levels. The idea was to use light to transfer information from a compromised device to the attacker.
You can check the original research and videos in the following url - https://www.checkmarx.com/blog/smart-bulb-exfiltration/
This proof-of-concept is made for educational and ethical testing purposes only. Usage of SmartBulbExfil for attacking targets without prior mutual consent is illegal. It is the end user's responsibility to obey all applicable local, state and federal laws. Checkmarx assume no liability and are not responsible for any misuse or damage caused by this program.