supremeDuck project is fully open source. There's a step by step tutorial for the bluetooth version,
there's a guide for the wifi version. There's also
documentation and design files available for the custom PCBs based on JDY-10, JDY-08 (both BLE) and Esp-12F (Wifi).
I encourage you to create the project yourself, but because the project requires some prerequisites that people often don't have
(e.g. soldering equipment) and because production of these devices is more entertaining than my job I decided to sell these devices myself. The shipments are made from Morecambe (UK) for £3 worldwide regardless of the destination.
Each JDY-10, JDY-08 and Esp-12F based USB device is inspected with microscope to make sure there are no
cold joints or solder bridges. Every device is fully tested before posting.
Regarding the bluetooth versions based on Arduino Pro Micro and HC-06 modules:
The Achilles' heel of the construction is definately the micro USB socket which could detach from
the board if excessive pressure is applied on the connector or the socket itself.
I'd recommend to handle it with care.
Please be aware that the devices may contain signs of obscurity like slightly
damaged cable jumpers around their insertions, possibly slightly askew direction of the connector in the hard-cased type.
The hard-cased type also has screws on the bottom side of it. That's the kind of box which is used.
Orders are posted the next working day.
The graph below presents the delivery time of previous orders (time between dispatch and arrival).
It's based on the feedback so I'd like to invite everyone who orders the device to let me know when it arrives, thanks.