# Holybro H-RTK-M8P

:::warning This GNSS has been discontinued, and is no longer commercially available. :::

The [Holybro H-RTK M8P GNSS](https://holybro.com/collections/standard-h-rtk-series/products/h-rtk-m8p-gnss-series) is an [RTK GNSS module]() series for the mass market. This family is similar to the [H-RTK M9P](rtk_gps_holybro_h-rtk-f9p) series but uses the smaller, lighter, and less expensive M8P u-blox RTK GNSS module (which still provides far superior position resolution than previous generations\_.

There are three models of Holybro H-RTK M8P to choose from, each with different antenna design to meet different needs. Refer to the [Specification and Model Comparison section](#specification-and-model-comparison) for more details.

Using RTK allows PX4 to get its position with centimeter-level accuracy, which is much more accurate than can be provided by a normal GPS.

![h-rtk\_rover](https://4155462212-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LArEa7z2SPawfl3HpCD%2Fuploads%2Fgit-blob-887d7f150c27961dd729a2dee3a2e04eb752a486%2Frtk_holybro_h-rtk-m8p_all_label.jpg?alt=media)

## Where to Buy

* [H-RTK M8P (GPS RTK Mounts)](https://holybro.com/products/vertical-mount-for-h-rtk-helical)

## Configuration

RTK setup and use on PX4 via _QGroundControl_ is largely plug and play (see [RTK GPS]() for more information).

## Wiring and Connections

All H-RTK GNSS models come with a GH 10-pin connector/cable that is compatible with [Pixhawk 4](../../flight_controller/autopilot_pixhawk_standard/pixhawk4).

:::note The cables/connectors may need to be modified in order to connect to other flight controller boards (see [pin map](#pin_map)below). :::

## Pin Map

![h-rtk\_rover\_pinmap](https://4155462212-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LArEa7z2SPawfl3HpCD%2Fuploads%2Fgit-blob-1f82cac64483ac7beac4ca169f99abe39f1521c9%2Frtk_holybro_h-rtk-m8p_pinmap.jpg?alt=media)

## Specification and Model Comparison

![h-rtk\_spec](https://4155462212-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LArEa7z2SPawfl3HpCD%2Fuploads%2Fgit-blob-1bfe6a2ff5a4684d24264562d3fd0b8a69949df0%2Frtk_holybro_h-rtk-m8p_spec.png?alt=media)

## GPS Accessories

[GPS Accessories (Holybro Website)](https://holybro.com/collections/gps-accessories)

![h-rtk](https://4155462212-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LArEa7z2SPawfl3HpCD%2Fuploads%2Fgit-blob-b45f2823fd5d38d2483cd414342b5b4af146dbaf%2Frtk_holybro_h-rtk_mount_3.png?alt=media)
