Hello All,
I tried to build 32x256 moving message display with bluetooth using arduino uno. First I tried with a single P10 led module and it is working fine with DMD library. But If I add more boards to that it is not working. Confused about external wiring to these modules and programming. Please help me on this.
-Chandu
A very common mistake is trying to power too many things from the Arduino 5V pin.
Help us to help you
You will have to provide much more detail information if somebody shall analyse your problem.
You should post a datasheet of your 32x256-module. (Never heard of it before)
You are mentioning blue-tooth.
Same thing with the "bluetooth" how is bluetooth involved in this project?
Do you use a bluetooth-module that is connected to your arduino and you can control the LED-module with a smartphone bluettooh-connection?
Does your arduino send the data to this inknown 32x256-module by bluetooth?
best regards Stefan
The library you use will need to know the number of panels, and the panel you are addressing. For example, in LedControl.h, the method to set an LED needs this to make the LED on Panel 0, at location a,b be in STATE (on/off):
lc.setLed(0, a, b, STATE);
Standard P10 panels has dimension 32x16 pixels, so in order to compose 32x256 display you need to connect 16 panels. I am afraid that it is a too much for Arduino uno. Try to use a board with more memory -mega, stm32 or rp2040
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