Modbus - Analog Out Bricklet – Tinkerforge

- Getting Started
  - Primer
  - Tutorials
  - FAQ
- Hardware
  - Bricks
  - Bricklets
  - Master Extensions
  - Power Supplies
  - Accessories
  - Timeline
- Software
  - Brick Daemon (brickd)
  - Brick Viewer (brickv)
  - API Bindings
  - Firmwares and Plugins
  - Device Identifier
  - Source Code and Bug Tracking
  - Programming Interface
- Starter Kits
  - Weather Station
  - Hardware Hacking
  - Server Room Monitoring
  - Blinkenlights
  - Internet of Things
  - Camera Slider
- Embedded Boards
  - Raspberry Pi
- Specifications
  - Technical Data
  - TCP/IP Protocol
  - Modbus Protocol
    - Protocol
    - API
      - Bricks
      - Bricklets
        - Ambient Light Bricklet
        - Analog In Bricklet
        - Analog Out Bricklet
          - API
            - Basic Functions
            - Advanced Functions
        - Barometer Bricklet
        - Color Bricklet
        - Current12 Bricklet
        - Current25 Bricklet
        - Distance IR Bricklet
        - Distance US Bricklet
        - Dual Button Bricklet
        - Dual Relay Bricklet
        - GPS Bricklet
        - Hall Effect Bricklet
        - Humidity Bricklet
        - Industrial Digital In 4 Bricklet
        - Industrial Digital Out 4 Bricklet
        - Industrial Dual 0-20mA Bricklet
        - Industrial Quad Relay Bricklet
        - IO-16 Bricklet
        - IO-4 Bricklet
        - Joystick Bricklet
        - LCD 16x2 Bricklet
        - LCD 20x4 Bricklet
        - LED Strip Bricklet
        - Line Bricklet
        - Linear Poti Bricklet
        - Moisture Bricklet
        - Motion Detector Bricklet
        - Multi Touch Bricklet
        - NFC/RFID Bricklet
        - Piezo Buzzer Bricklet
        - Piezo Speaker Bricklet
        - PTC Bricklet
        - Remote Switch Bricklet
        - Rotary Encoder Bricklet
        - Rotary Poti Bricklet
        - Segment Display 4x7 Bricklet
        - Solid State Relay Bricklet
        - Sound Intensity Bricklet
        - Temperature Bricklet
        - Temperature IR Bricklet
        - Tilt Bricklet
        - Voltage Bricklet
        - Voltage/Current Bricklet
  - Wireshark Dissector

# Modbus - Analog Out Bricklet

This is the description of the Modbus protocol for the Analog Out Bricklet. General information and technical specifications for the Analog Out Bricklet are summarized in its hardware description.

## API

A general description of the Modbus protocol structure can be found here.

### Basic Functions

`BrickletAnalogOut.``set_voltage`

  Function ID: | 1

  Request:

  - voltage -- uint16

  Response: | no response

  Sets the voltage in mV. The possible range is 0V to 5V (0-5000). Calling this function will set the mode to 0 (see `set_mode`).

  The default value is 0 (with mode 1).

`BrickletAnalogOut.``get_voltage`

  Function ID: | 2
  Request: | empty payload

  Response:

  - voltage -- uint16

  Returns the voltage as set by `set_voltage`.

`BrickletAnalogOut.``set_mode`

  Function ID: | 3

  Request:

  - mode -- uint8

  Response: | no response

  Sets the mode of the analog value. Possible modes:

  - 0: Normal Mode (Analog value as set by `set_voltage` is applied)
  - 1: 1k Ohm resistor to ground
  - 2: 100k Ohm resistor to ground
  - 3: 500k Ohm resistor to ground

  Setting the mode to 0 will result in an output voltage of 0. You can jump to a higher output voltage directly by calling `set_voltage`.

  The default mode is 1.

`BrickletAnalogOut.``get_mode`

  Function ID: | 4
  Request: | empty payload

  Response:

  - mode -- uint8

  Returns the mode as set by `set_mode`.

### Advanced Functions

`BrickletAnalogOut.``get_identity`

  Function ID: | 255
  Request: | empty payload

  Response:

  - uid -- char[8]
  - connected_uid -- char[8]
  - position -- char
  - hardware_version -- uint8[3]
  - firmware_version -- uint8[3]
  - device_identifier -- uint16

  Returns the UID, the UID where the Bricklet is connected to, the position, the hardware and firmware version as well as the device identifier.

  The position can be 'a', 'b', 'c' or 'd'.

  The device identifier numbers can be found here.

The content of this page is licensed under Creative Commons Attribution 3.0 Unported License.