> For the complete documentation index, see [llms.txt](https://beyond-robotix.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://beyond-robotix.gitbook.io/docs/air-data-module/air-data-module-mini.md).

# Air Data Module Mini

Improve design of the Air Data Module - Compact and Reliable

The Air Data Module Mini is an all in one board that reads airspeed and barometric altitude and outputs over DroneCAN. The module has a number of protection features including over-current protection, over and under-voltage protections, reverse polarity protection and ESD protection.

<figure><img src="https://1239082692-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdPR57GIwyNGpujTZHIUm%2Fuploads%2FDexgh1PobQTsWVr1TCMz%2FADM%20Mini%20Top%20Bottom.png?alt=media&amp;token=dcc3b633-e382-4c08-ada6-ed2969f7056c" alt="" width="375"><figcaption></figcaption></figure>

## Specifications

* Mass: 3.8 g (Sensor module only)
* Dimensions: 33x17mm
* Power: 21mA (4.5 - 5.5 V)
* Operating Temperature: -40 °C to +85 °C
* Absolute Pressure Operating Range: 25kPa - 125kPa
* Connector: JST-GH 4 Pin (compatible with Pixhawk and Cube CAN port)

## Pinout

The main connector on the board is a JST-GH with the Pixhawk standard CAN pinout.

<table><thead><tr><th width="316" align="right">Pin</th><th>Function</th><th data-hidden>Notes</th></tr></thead><tbody><tr><td align="right">1</td><td>5V</td><td>Recommended: 4.5 - 6V</td></tr><tr><td align="right">2</td><td>CAN H</td><td></td></tr><tr><td align="right">3</td><td>CAN L</td><td></td></tr><tr><td align="right">4</td><td>GND</td><td></td></tr></tbody></table>

<figure><img src="https://1239082692-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdPR57GIwyNGpujTZHIUm%2Fuploads%2FxQvmhSMVI4sSpUzDK3BS%2FJST.png?alt=media&amp;token=c1f14bea-ecc5-40cf-8551-80ac7e66680b" alt="" width="375"><figcaption></figcaption></figure>

## Extra Pins

<figure><img src="https://1239082692-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdPR57GIwyNGpujTZHIUm%2Fuploads%2FcrplclFKG1Al9oZhi3uN%2FPads.png?alt=media&amp;token=37c687de-2fd4-452c-84a5-de494a1cdf28" alt="" width="375"><figcaption></figcaption></figure>

The series of pads on the bottom can be used for other peripheral activities.

* 5V - Direct 5V from the JST-GH after reverse polarity protection
* 3V3 - The 3.3V rail used by the STM32 and the AUAV sensor. You can use it but the peak supply is 500 mA.
* GND - Common ground between all power and logic
* 1 - PWM output from pin 1 of the STM that can be used as standard servo PWM or GPIO\*
* 2 - PWM output from pin 2 of the STM that can be used as standard servo PWM or GPIO\*
* 15 - ADC input to pin 15 of the STM, can also be a GPIO\*
* 16 - ADC input to pin 16 of the STM, can also be a GPIO\*
* RX2 - **Serial2** receive (input) from the STM
* TX2 - Serial2 transmit (output) from the STM
* H - CAN H output of the CAN transceiver - Common with JST-GH
* L - CAN L output of the CAN transciever - Common with JST-GH
* 120R - Jumper to enable the 120 Ohm terminating resistor between CAN H and CAN L (not enabled by default)

The circle pads are used for programming.

## Mechanical

A mechanical drawing of the Air Data Module Mini along with a step file. The pitot-static tube CAD can be found [here](https://grabcad.com/library/pitot-tube-5).

<figure><img src="https://1239082692-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdPR57GIwyNGpujTZHIUm%2Fuploads%2F8OALgjZLnuTCiFNQGHmE%2FMechanicalDrawingSnap.png?alt=media&amp;token=212eef55-2724-41b8-bee0-c94cf3d52248" alt="" width="328"><figcaption></figcaption></figure>

{% file src="/files/PGzr3pIPWlhw6VpYtrRN" %}

{% file src="/files/Kk1MsdrBxOMCCQpzaw6Y" %}

## Firmware

Below are the binaries that can be used to flash the Air Data Module Mini. You can upload the firmware in Mission Planner or DroneCAN GUI.

{% hint style="danger" %}
Make sure you put the correct firmware on your Air Data Module Mini - Check your AUAV Sensor to see which version you need. No error will show if you upload the wrong firmware, but your airspeed reading will be incorrect.
{% endhint %}

{% file src="/files/T8DsujgNrTcK8y963ZqX" %}

{% file src="/files/cZ7P2wygDEUoNFmzv9xn" %}

{% file src="/files/pL7lahEYo5xI54VLwaa7" %}

{% file src="/files/HHkcfQ8hNoMqesd7JgPv" %}

{% file src="/files/Auvp6SFuIZWNqrywY1av" %}