@ozgurtzc Thank you for your answer, but your linked post still doesn’t give any clue about the pinouts. OK, TX/RX should be pins 0 and 1, what about the GPIO0 and GPIO2? Are they connected somewhere on the board? Or only serial communication is available with it?
If all DIP switches have to be ON instead of just the corresponding Arduino’s 0 and 1, it means that there are some pins corresponding to at least the 2 GPIOs also, isn’t it?