Wasn’t this fun! I struggled quite a bit hooking up one of the internal Bluetooth modules to the Newton, but finally managed to get some results. Turns out that the CTS and RTS lines need to be switched and that it helps a lot if you actually provide all necessary power lines to the module. I was trying for a while to run it on 3.3V alone, but the actual core needs 1.8V as well. I’m sure that any hardware designer would have ran out of the room screaming observing how I found all requried connectors on the mainboard, but so what :) The thing runs and answers nicely to a HCI reset command with a command status event. Let’s hope that things stay that way!