Cuby G4 - Modbus
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      3. Cuby G4 - Modbus

      Cuby G4 - Modbus

      Air Conditioner Controller with Modbus

      CONNECTION

      This version uses a USB-C Cable to expose the power and RS485 interface.

       

      cable-modbus

      Note: This version only supports +12VDC. The next hardware version will support +7V to +32V and will feature a different power harness.

      IMPORTANT: This version has the 120 OHM resistor installed. If you do not need the 120 OHM resistor, you must open the device and cut it with some flush cutters. It is marked as “120” on the PCB. The next version has a software-selectable 120 OHM resistor.

       

      CONFIGURATION

      This version requires configuration through the app. New firmware version coming in the following weeks will not require the app.

      1. Download the Cuby Smart App.
        iOS http://cuby.mx/app/ios
        Android http://cuby.mx/app/android

      2. Create an account and login.

      3. Select from the top menu: “Add Cuby”

      4. Select “Cuby G4” in the list.

      5. Follow the steps in the app to connect the device to a Wi-Fi network.

      6. Once you have successfully added the Cuby to the network you should see a new device on the home screen. Select that device.

      7. On the bottom right part of the screen you will see the “Configuration” option, select that.

      8. Look for an option labeled: “Configure A/C Protocol”

      9. Follow the steps there to search and find a working protocol for the minisplit unit you will test on.

      10. Once you have a working protocol version select “Yes” and continue to save the protocol.

      11. Now you can test with Modbus.

      MODBUS REGISTERS

      Currently this device uses the fixed Address 1. On the next firmware release we will allow for dynamic setting of the address as well as different register map and other customizable features (baud rate, etc).

      Serial configuration is 9600 8n1.

       

      Register Address
      (protocol Address)

      Register Address
      (PLC address)

      R/W

      Description

      NOTES
      0 1 R/W

      AC ON/OFF
      0: Off
      1: On

      This controls the power state of the A/C.
      1 2 R/W

      AC MODE
      0: Auto
      1: Heat
      2: Dry
      3: Fan Only
      4: Cool

      The operating mode of
      the A/C.
      2 3 R/W

      FAN SPEED
      0: Auto
      1: Low
      2: Med
      3: High

      The fan speed of the A/C.
      3 4 R/W

      IR PROTOCOL

      0 to 254

       

      If set to any other value outside 0 to 254 it will use the currently configured protocol.
      4 5 R/W

      AC Temperature Setpoint
      16-31C (x10C)

      This defines the temperature setpoint that the minisplit will be configured at.
      6 7 R/W

      Command Type

      0: power

      1: temperature

      2: mode

      3: fan speed

      4: display

      5: vertical vane

      6: horizontal vane

      7: turbo

      8: units

      Command type is only required for some special commands like display, turbo, swing or units. For the rest of the commands the value 0 (power) can be used.
      7 8 R/W

      Display

      0: Off

      1: On

      Some Minisplits have a toggle command for display, so sending 0 or 1 will toggle the current state.
      8 9 R/W

      Turbo

      0: Off

      1: On

      Turns ON or OFF the Turbo mode available on some models.
      9 10 R/W

      Vertical Vane

      0: Off

      1: Auto

      2: Top

      3: Top-Center

      4: Center

      5: Bottom-Center

      6: Bottom

      This is the vertical swing. Not all models have the discrete options from 2 to 6. G14
      10 11  R/W

      Horizontal Vane

      0: Off

      1: Auto

      2: Left

      3: Left-Center

      4: Center

      5: Right-Center

      6: Right

      7: Sides

      This is the horizontal swing. Not all models have the discrete options from 2 to 7.
      11 12 R/W

      Temperature Units
      0: Celsius
      1: Fahrenheit

      Some A/C have a Units command that changes the display’s units.
      12 13 R

      Command Source
      0-31

      Indicates who sent the last command. There are several sources (IR Remote, thermostat, Mobile App, Modbus, Local Rule, Remote Rule, HTTP API, Bacnet, etc)
      13 14 R

      Indoor Temperature

      -32768 (Initial Value)
      -50 to 125C (X10)

      Temperature in Celsius read by the Cuby or one of its sensors.
      15 16 R

      Indoor Relative
      Humidity

      -32768 (Initial Value)
      0 to 100% (X10)

      Relative humidity read by the Cuby or one of its sensors.
      19 20 R/W

      Occupancy Status

      -32768 (Initial Value)
      0: Vacant
      1: Occupied

      Occupancy status.
      22 23 R

      Open Time

      -32768 (Initial Value)
      0-32000 seconds

      Time in seconds that at least one sensor has been in an open state. It resets when all sensors are closed.
      40 41 R/W

      Force IR Command

      Writing a 1 to this register forces an IR command. This register will always read 0.
      48 49 R

      FW Version

      The current firmware version of the Cuby.