Hello all,
first attempt did not work.
I've used those connections:
Arduino -> LD80001b
GND -> GND
3.3.V -> VCC
5 -> RX
4 -> TXand
LD80001b -> LD80001b
P19 -> GND
I tried also with
LD80001b -> LD80001b
P12 -> GND
P19 -> GND
Both with Arduino IDE and CoolTerm
The only way I could receive something from LD80001 was with its own
RX1 and TX1 which did not have pins soldered on (when received)
I'll try the following connection set again and let you know.
Arduino -> LD80001b
GND -> GND
3.3.V -> VCC
5 -> RX1
4 -> TX1and
LD80001b -> LD80001b
P19 -> GND
You gave me two good tips: the use of softSerial library and the init code.
Thanks for that.