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huVVer AVI Aircraft Instrument

  • 3.125" cutout instrument case shown.  AHI.
  • 3.125" cutout instrument case shown.  Altimeter
  • 3.125" cutout instrument case shown.  AOA.
  • 3.125" cutout instrument case shown.  Compass.
  • 3.125" cutout instrument case shown.
  • Image 6
  • Engineering and mounting drawing for 3.125" instrument cutouts.  This is recommended for flush mounting only.
  • Engineering and mounting drawing for 2.25" instrument cutouts.  This is recommended for fascia mounting only.
  • Wiring for Dynon Skyview or Garmin G3X.  Note that the huVVer AVI is also able to connect to the Dynon Skyview with a wireless connection.
0.20 KGS
Calculated at checkout

Product Description

Important!  Currently, the huVVer-AVI devices require an external Dynon SkyView or Garmin G3X system to provide reliable air, system, and engine data. Future enhancement will use other data sources (both wired and wireless) to provide more flexibility.

Of note, MakerPlane and OnSpeed ( are both developing open source stand-alone precision ADAHRS systems that will be supported by the huVVer-AVI devices.  These will provide alternative flight data options for users to drive the screens.  These will be released later in 2021.


The huVVer-AVI™ is a general-purpose customizable aircraft instrument that uses the Espressif Systems ESP-32 microprocessor. Instrument source code is provided for the popular Arduino platform, ensuring long-term support and enhancements from developers world-wide.  There are two versions of the instrument.  One is for a 2.25" instrument cutout and the other is for a 3.125" instrument cutout.  The only difference is the case the instrument is mounted in.  Be sure to select the correct version.  (The default selection is 3.125".)

Created for experimental aircraft applications, the huVVer-AVI provides a bright 2.4 inch (61 mm) LCD screen, dual RS-232 serial ports, a CAN bus interface, two relay or lamp drivers, two sensor inputs, a pair of stereo audio outputs, and four front-panel pushbuttons that fits into a standard aircraft 2.25” or 3.125” panel cutout. Operating at input voltages from 8 to 35 volts, and withstanding voltage surges of up to +/- 100 volts, the device is ideally suited to aeronautical applications.

Arduino ( is an open-source hardware/software integrated development environment (IDE), originally created as an educational tool. It has been widely adopted by small to medium sized companies as the platform of choice for quick-turn development of custom microcontroller applications. Developers worldwide support the millions of Arduino users, providing readily available, low cost hardware and open-source software.

The huVVer-AVI family was developed to be production-ready prototyping systems. Fully compatible with the Arduino or Espressif IDE development environments, it provides robust power conditioning and multiple levels of protection from electrostatic discharge, over voltages, and short circuits. The devicesvfit into standard aviation 2-inch or 3-inch circular instrument cutouts.


The huVVer Mk1 is available as an open source hardware design and the schematics and information can be downloaded at this page:

To download the latest software for the instruments go here:

The arduino libraries and open source code can be downloaded here:


  • Easy to use, open-source Arduino programmable aircraft instrument.
  • Bright 850 cd/m2 320 x 240 pixel US-made color display.
  • Four front panel programmable buttons.
  • High performance Espressif ESP-32 dual-core 240 MHz microprocessor with 520 KB SRAM, and 4 MB Flash memory for programs and data.
  • 802.11 b/g/n WiFi and Bluetooth V4.2/LE for wireless connections to external devices.
  • CAN, dual RS-232 serial, and USB interfaces for wired connections to external devices.
  • Operates from 8 to 35 Volts DC with -20 °C to +55 °C ambient temperatures and provides extensive power and I/O conditioning to increase reliability in harsh environments.
  • I/O capability
    • Two general purpose (0-5 volt) sensor inputs.
    • Left and Right stereo audio (8-bit) for alarms and signaling. 300 ohm source impedance.
    • Two 50 Volt open-collector I/O channels for driving external lamps or relays, with on-board coil suppression.
    • Two RS-232 Serial ports.
    • One CAN based Two-Wire Automotive Interface (TWAI, compatible with ISO11898-1)
    • One Universal Serial Port (USB) for program development.
    • 5 Volt power output for powering external sensors.

  • The initial flight instrument library includes the following
    • Airspeed Indicator,
    • Altimeter,
    • Heading Indicator,
    • Attitude Indicator,
    • AOA indicator, and
    • Various debug pages (to assist in installation and program development).

  • Most instruments are configurable to display supplementary information, to change units, or to configure ranges and thresholds.


For installation, you will need Mil-spec wire, a number of crimp terminals and at least one connector housing. Appropriate terminal crimper, wire cutter and wire stripper tools are also required.

Crimp Pins: Digikey WM2312-ND. Note: MakerPlane supplies 10 pins with each instrument.

Connector Housing: DigiKey WM2006-ND. Note: MakerPlane supplies two housings with each instrument.

Wire and wiring supplies: Mil-spec M22759/16-22 (22 AWG single), M27500/20SB1T23 (22 AWG shielded single wire), M27500/22SB2T23 (22 AWG shielded pair), plus a circuit breaker as required.

Available from Aircraft Spruce or ProWire USA.


Product Videos

2.25" huVVer AVI in-flight video (00:51)
Shipping 1 June 2021. Order now for only US$199. Here is an in-flight video of the 2.25" huVVer AVI instrument connected to the Dynon SkyView. It will also connect to a Garmin G3X. It provides excellent sunlight readability. For more information and to order go to The store page also contains links to the open source hardware and software files. Create your own instruments!
  • 2.25" huVVer A...
    Shipping 1 June 2021. Order now for only US$199. Here is an ...
  • New 3" Instrum...
    We are releasing a new 2" and 3" instrument in collaboration w...

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