After some days of soldering, testing and coding I am now able to control my LED marquee remotely via bluetooth from my Raspberry Pi. Using an Arduino Pro Mini (5V model) and the HC-05 module mentioned in my last blog post, I was able to mount all components inside the sign’s housing.
Some features of the bluetooth enabled display:
- send messages to display (up to two messages with a length of 360 characters each are possible)
- select display mode (message – time – off)
- set time from and to Real Time Clock
- set display intervals
- increase/decrease speed of marquee
The sourcecode consists of the Arduino sketch to control the sign and a Python class that encapsulates the communication and message handling to the LED sign. As always, the sources will be available in my GitHub repository (direct link to sources). In this post I will describe the hardware and software developed to accomplish this. Some soldering skills may be required… Continue reading