RS-485 Transmitter (Troyka Module)

Vendor code AMP-B064
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1 pc.
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Assemble controllers, sensors and actuators on one network. Temperature and humidity sensors, buttons and potentiometers, LED arrays and servo motors - you can add whatever you need. The RS-485 network can operate with up to 32 modules at a distance of up to 4000 feet - all in two wires.

Combine several Arduino or Iskra modules via RS-485 modules and deploy a network of intelligent sensors, link smart home systems, or automate watering from over half a mile away.

Data exchange is done by two wires. The network is built according to the common bus scheme, all devices are connected in series by one pair of wires.

Connect the second pair of cables and the module will transmit power up to 120-150 feet. Now, in winter your sensors won’t freeze, nor do not have to add additional outlets in your greenhouse or garage.


The RS-485 (Troyka-module) works in half-duplex mode. This means data can be transmitted at any time on one node of the network. Data is transmitted immediately by two wires using a differential method. The information bit is encoded via potential difference between the two wires. This method of transferring significantly reduces interference. The signal is imposed equally on both wires and is “not visible” when measuring the potential difference of these wires. This allows you to communicate with devices at a distance of up to 4000 feet.


Connection of this module differs from the standard, it has two three-pin connectors.

Connect the module via 3-pin jumper cable. The 3-pin jumper cables needed for the connection are included in the kit.

There are several different ways to wire this module:

Troyka Shield. The most straightforward method. Connect the module to a pin group on Troyka Shield with the 3-pin jumper cable and you’re ready to interface with it from your Arduino.

Troyka Slot Shield. The best choice for quick prototyping. Using slots on the shield, you can get rid of cables. The module will be held securely in place using both pin headers.

Breadboard. For advanced use. Troyka pin headers have 0.1” spacing which is compatible with any breadboard. Simply wire the module like you would do with any IC.

  • Connect RO to the RX pin of the target device
  • Connect DI to the TX pin of the target device
  • Connect V to power (3.3 - 5 V)
  • Connect G to ground
  • Connect ↑ ↓ to select the module mode - receiver or transmitter



  • Supply Voltage: 3.3-5 V
  • Current Draw: 10 mA
  • Maximum Communication Distance: 1200 m
  • Maximum Number of Nodes in the Network: 32
  • Interface: serial port (UART)
  • Chip RS-485: SN65176BDR (MAX485)
  • Dimensions: 25.4 × 25.4 mm (1 × 1 in)