# Step 2d: Mounting M10 GPS Module and metal frame

## Introduction

The kit may include either or both an ARMING board and/or a GPS module. \
The GPS module in addition to being used for GPS, it does also include an arming/safety switch, LED lights and a beeper.  Generally if you have a GPS, it is preferred to use that rather than the ARMING board. 

## PX4 Arming Board vs GPS

{% hint style="success" %}
NOT all kits include the GPS module. Notably the NXP-CUP car kit will not. Instead use the [PX4ARMINGBOARD BOARD](/mr-b3rb/archive/whats-in-the-box-pre-production-version/witb-mr-b3rb-bmf.md#px4armingbrd) and stick it down in a convenient location.
{% endhint %}

The arming board will provide the same beeper and arming buttons. However, it does not include a compass component.\ <br>

## Install M10 GPS module

If provided in your kit, please install the GPS and GPS post mounting, \
The pieces are listed in the [WITB GPS Module](/mr-b3rb/archive/whats-in-the-box-pre-production-version/witb-m-10-gps-module.md) page.&#x20;

{% hint style="info" %}
Important notes:\
\
1\) Install the base plate with the <mark style="background-color:orange;">clamping screw pointing either forward-right or forward-left</mark>. This will allow you to loosen/tighten even when the plastic rear piece is installed.<br>

2\) install the GPS so that the <mark style="background-color:orange;">arrow is pointing forward</mark> on the B3RB<br>

3\) Zip ties the cable so that it stays tight against the carbon fiber mounting tube. This is to minimize interference with the LIDAR beam&#x20;

\
4\) Don't tighten down the mast clamping screws, you will need to remove the GPS top or the GPS and the MAST in future steps. Tighten them only enough so the parts can still wiggle and be removed.&#x20;
{% endhint %}

### GPS parts

<figure><img src="/files/XbgwoDgSK3CDaaUxfwu0" alt=""><figcaption></figcaption></figure>

### GPS Base installation

<mark style="background-color:orange;">There is a set of screws that comes with the GPS unit.</mark>\
Use the 4 longer screws and Nylock Lock Nuts to attach the base mount.&#x20;

It should be placed in this furthest back position:

<figure><img src="/files/HmAXvMhbkqTqgCfcKQlz" alt=""><figcaption></figcaption></figure>

### GPS Mast installation

Attach the mounting mast rod and fasten it with one of the smaller two screws left. \
At this time only tighten the screws loosely as you will need to rotate align and remove the mast before completion.

&#x20; \
Attach the top mount with the remaining screw. \
Keep it also only loosely tightened.\
\
It should look like this when completed:

<figure><img src="/files/j2R39mxkhRS1GdgUZUna" alt="" width="563"><figcaption><p>Orient the lower clamp so that it can be accessed from the side. As shown here.</p></figcaption></figure>

<figure><img src="/files/ixNTHTm7dMjbVO8Xj2Jh" alt="" width="375"><figcaption></figcaption></figure>

### Attach the M10 GPS module to the mast

Locate the M10 GPS and the 3M double tape.&#x20;

<figure><img src="/files/7QR7ts5JdInBFUhrlFzv" alt="" width="375"><figcaption></figcaption></figure>

### Attach the double tape in the center of the top mount.&#x20;

<figure><img src="/files/7oFmWWWGfPi8QB3E8x8g" alt=""><figcaption></figcaption></figure>

### Align GPS facing forward

Carefully align the GPS in the center of this tape. Ensure the arrow on the GPS module is facing forward. The cable of the GPS should be zip tied so it stays very close to the GPS mast in order to not obstruct the LIDAR sensor.<br>

<figure><img src="/files/ISiYCJA3e52NemGnmWLX" alt="" width="427"><figcaption><p>Zip tie the GPS cable so that it is tight to the mast.</p></figcaption></figure>

<figure><img src="/files/niuYMYLUm3eM8GYgltEe" alt=""><figcaption><p>The GPS and cable will fit in the slot of the back plastic</p></figcaption></figure>

Trim any long cable ties with side cutters.


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