To add a GPS to the RAK5005-O base board, you need the [RAK1910 GPS sensor](https://store.rakwireless.com/collections/wisblock-sensor/products/rak1910-max-7q-gnss-location-sensor). It is supported on slot A of the 5005 board via UART.
To add a GPS to the RAK19003 base board, you need the [RAK12500 GPS sensor](https://store.rakwireless.com/products/wisblock-gnss-location-module-rak12500). It is supported via I<sup>2</sup>C on slot B for firmware versions 1.49 and above.
The [RAK18001 Buzzer Module](https://store.rakwireless.com/products/wisblock-buzzer-module-rak18001) is currently being tested for integration with the External Notifications plugin. There is currently a known conflict with buzzer if the module is placed in Slot D, although other slots should work.
The [RAK13002 IO Module](https://store.rakwireless.com/collections/wisblock-interface/products/adapter-module-rak13002) can be used to, among other things, add a user button to the RAK base boards (excluding the RAK19003 Mini base board). It features a number of different interface options:
The [RAK1901 Temperature and Humidity Sensor](https://store.rakwireless.com/products/rak1901-shtc3-temperature-humidity-sensor) is based on the Sensirion SHTC3 module and has the following features:
- Temperature measurement (Range -40°C to +125°C)
The [RAK1902 Barometric Pressure Sensor](https://store.rakwireless.com/products/rak1902-kps22hb-barometric-pressure-sensor) is based on the STMicroelectronics LPS22HB module and has the following features:
The [RAK1906 Environment Sensor](https://store.rakwireless.com/products/rak1906-bme680-environment-sensor) is based on the Bosch BME680 module and has the following features:
