It is a half-duplex, 2-wires, low noise bus that allows high speeds and remote devices connection (up to 1200 meters). Indeed, rs485 is a well known standard that has been widely used in the industrial context and in building automation applications. I expressly selected rs485 because Arduino-based microcontrollers are not ready for Ethernet yet (even though some examples still exist but without great success).

The nice feature of the development board I used is that it has many interfaces such as Ethernet, rs485, rs232 and I☬ as well. In this post I’d like to describe you a project I’m working on that consists of connecting an Android development board to one (or more) Arduino slave(s) using modbus protocol and rs485.Įven though the idea of this project could be applied in many fields, I chose to contextualize it in a typical smart home context: a touch display that dims lights, shows temperatures and bulbs statuses. Arduino Tutorial Online Courses Video Training.

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