How to connect a TTL device to this TTL to RS485 module ?

[milan.rajik]

How to connect a TTL device to this TTL to RS485 module ?

https://www.electrodragon.com/w/TTL_to_RS-485_Module_(MAX485,_RS-485)


I need to connect Ultrasonic sensor SR 04 which has VCC, GND, TRIG and ECHO pins to Arduino but need to use a TTL to RS485 module in between for 50 feet communication.

 

[KlausST]

Hi,

did you read MAX485 datasheet?

What else do you need to know?

Klaus

 

[milan.rajik]

I just need the connection (wiring diagram) between Arduino and SR 04 US Sensor where TTL to MAX485 module shown in post 1 is used inbetween Arduino Mega2560 and US Sensor.