Bluetooth? More Like Bluehurty.

A project log for DoMSnif - Dot Matrix LCD Sniffer Bluetooth Adapter

Output dot matrix LCD data from different devices to your phone or laptop via Bluetooth.

BleckyBlecky 07/08/2019 at 09:410 Comments

After some testing, the nRF52832 on the Feather module being used is not going to work well for this project alone.

The data is fed into the LCD approximately every 14us:

However the critical radio sections of the nRF52832 can take much much longer than this:

These Bluetooth critical sections have the highest priority on the nRF52832 (otherwise they wouldn't work), so several LCD data events can occur before the LCD data ready interrupt is actually triggered (aliasing/skipping data).

So now to find another method of gathering the LCD data...