8 interfaces are available! All were tested:
Price per unit (without OLED screen): 26,68€ (without shipping)
If you want, I can provide you interface + OLED display assembled:
Price per unit (with OLED screen): 55,55€ (without shipping)
As described in my first post, 4 OLED colors are available : white, blue, green and yellow.
Payement by Paypal.
See you,
Romain