im new to arduino and want to make a project, but have no idea if its possible or not.
What i want to do is to use arduino (or raspberry pi) to send data to multiple wireless connected displays. i would like to use NRF24 or bluetooth.
The data isnt much or big, and i only want to send data once, then the display should stay with the content/image.
Is this possible with arduino?
What do i need and how i can implement it?
I want a very very small mc on the displays if possible.
the displays itself should be smaller than 4.5 inch.
im thinking of oled or e ink, best fit would be 4.25 inch e-ink displays.
The arduino would be the host, and there are like 10 to 30 displays that are around in an area of around 1-4 meters.
the arduino (or pi) must connect to the displays and send them image informations to display from time to time. (like once every 10 sec)
thanks for any help, tips or something else
ah and by the way.. i would be very very happy for some tips for display. actually looking online and have found a few, but not that much and kinda expensive.
i only need black, white and red. more colors would be great, but dont have to.
Most display technologies are going to require a microprocessor on the display. With the added complication of wireless then you will definitely need something like a small Arduino to take the wireless data and send it to the display.
Do some prototyping and then buy a bulk lot of Arduinos. I'm sure you can find Pro Minis or Micros in packs of 10 for a few bucks. The Pro Mini is often the cheapest because it has no USB connectivity built in. One FTDI programmer can be used to program as many as you want.
For the displays I like the Adafruit catalog. They have one of everything. E-ink, OLED and more. Once you've worked out what will work for you, you can bulk-buy those from China too.
The biggest constraint IMHO will be the number of Arduino pins needed to drive the display. When you have chosen a specific display you can then figure out what Arduino is needed to control it. Wireless with nRF24L01+ modules should be straightforward.
I have used an nRF24 together with an Attiny1634 to make a very small package for radio control for model trains, but I doubt if your project would require you to go to that much trouble.
Bluetooth has the convenience that it can connect directly to a phone or laptop but it also has the big inconvenience that it is generally a 1 to 1 communication system. With nRF24s you can easily communicate between a master and many slaves.
