Geeetech

RS485 Receiving:
- Vcc <-> GND = 3.28V
- DI <-> GND = 3.28V
- A <-> GND = 3.00V
- B <-> GND = 1.57V
- DE <-> GND = 0V
- RE <-> GND = 0V
- RO <-> GND = 3.28V

I have the same results:
- Vcc <-> GND = 5.14V
- DI <-> GND = 5.14V
- A <-> B = 1.8-2.5V (changes when receiving data)
- DE <-> GND = 0V ...

jack wrote:Hi there,
Could you provide us your wiring diagram to let us know about details?

Best regards
Jack

I attached photo with connection. Thanks.

Hello!
I bought this board and tested to work with RS485 port.
The data is successfully sent by the board, but it can not receive data!
The second pin is set to LOW (digitalWrite(2, LOW);).
I measured the voltage between the following contact of SP485 chip (see attached image):
- Vcc <-> GND = 5.14V ...