The development is over and we have a fully working system:
There is wifi communication between the 5 separate score displays, so that one of the units decides what “font” to display and sends the new font to the other 4 displays.
I’ve also added the ability for a unit to run without an sd card installed. (in this case it can display 40 different “rendered” 7-segment style fonts, but cannot display the jpeg files (which are on the sd card). This makes it a cheaper option for anyone not interested in jpeg images, but wants the colour choice flexibility. (The sd card reader is cheap, so i’d always recommend installing this on all boards). why? Because:
I’ve also added a software firmware update option. This auto upgrades the software if a new version is saved onto the sd card.
I’ve done a lot of testing on these, but still more tests to do.
Almost ready to offer these out as a “community” project for anyone who wants to build their own set.
I’ll publish a BOM - Bill of materials and typical costs. All the components are readily available, off the shelf, the only thing that isn’t are the two pcbs - the 6 or 7 digit display board pcb and the base controller board. I’ll get a batch of these produced once i’ve got an idea of demand.
I may also be able to source all the hardware parts into a kit if there is demand for that too?
The software will be made available to upload to your own board. Again I could possibly pre-load this onto the esp32s if I’m supplying these.