I need two Arduino devices (Arduino Mega and Nano) to communicate with each other via UART. The two Arduino devices are long distance apart from each other. The distance is
- The Arduino 1 TX pin is connected to Arduino 2 RX pin.
- The Arduino 1 RX pin is connected to Arduino 2 TX pin.
Now, I have to use resistor to preform impedance termination so that the long distance does not cause transmitting and receiving issues between the two devices. I did some research and found an image that shows the signal differences when impedance termination is preformed and when it is not.
I have two questions:
1. Since the distance between both Arduino devices is
1.5 meters, what resistor value should I use? How is that calculated?
2. Where do you put the resistors? It's not really clear on where to connect the resistors. Between ground and the RX pins on each device?
I don't know the gauge ratings of my wire but if that information is needed, I am using this wire.