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Description: Our friends over at LinkSprite have made this nifty little RS485 Shield, now you will be able to have a communication port for your field bus directly connected to your Arduino! Even though the RS485 is sometimes thought as an “archaic” protocol, it will allow up to 32 devices to communicate through the same data line over a cable length of up to 4000ft with a maximum data rate of 10Mbit/s. Those aren’t bad numbers!

This version of the RS485 shield removes the optional DB9 connector bay and adds a second 2-pin screw terminal and the ability to choose two pins from your Arduino’s D0 to D7 as Software Serial Ports to communicate with the shield.

This shield does come without its headers separate so a small amount of soldering will be required before attaching it to your Arduino device.

Documents:

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Customer Comments

  • i don’t like this board the idea is great and RS-485 rocks. The termination resistor should have a jumper as well as the pull up and down resistor for the A and B. If you want to have 2 Arduinos talking this board would work fine as is. If you want to add more than two devices the resistors not having jumpers will cause you trouble as you add more devices. I guess you could always remove those resistors.

  • I’ve used a MAX485 chip to talk to a Mindstorm NXT before over its high speed serial line. This shield looks easier to use since there is no custom code that needs to be written (just use SoftwareSerial) and you can set what your TX/RX pins are with jumpers.

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