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.
- uBlox MAX-7Q GPS module
- GPS and GLONASS satellite support
Further information on the RAK1910 can be found on the [RAK Documentation Center](https://docs.rakwireless.com/Product-Categories/WisBlock/RAK1910/Overview/#product-description).
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.
- uBlox Zoe-M8Q GNSS receiver
- GPS, GLONASS, QZSS and BeiDou satellite support
Further information on the RAK12500 can be found on the [RAK Documentation Center](https://docs.rakwireless.com/Product-Categories/WisBlock/RAK12500/Overview/#product-description).
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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.
Further information on the RAK18001 can be found on the [RAK Documentation Center](https://docs.rakwireless.com/Product-Categories/WisBlock/RAK18001/Overview/#product-description).
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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:
- 2x I<sup>2</sup>C interfaces
- 2x UART interfaces
- 1x SPI interface
- Upto 6x GPIOs
- 2x ADC interfaces
- 3.3v Power rails
There is development activity in progress to get sensors such as this added to the Meshtastic Core.
Further information on the RAK13002 can be found on the [RAK Documentation Center](https://docs.rakwireless.com/Product-Categories/WisBlock/RAK13002/Overview).
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)
- Humidity measurement (Range 0% to 100%)
- Lower power consumption
Further information on the RAK1901 can be found on the [RAK Documentation Center](https://docs.rakwireless.com/Product-Categories/WisBlock/RAK1901/Overview/#product-description).
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:
- Barometer measurement (Range 260 to 1260 hPa)
- Low power consumption of 3uA
- Small form factor
Further information on the RAK1902 can be found on the [RAK Documentation Center](https://docs.rakwireless.com/Product-Categories/WisBlock/RAK1902/Overview/#product-description).
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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:
Further information on the RAK1906 can be found on the [RAK Documentation Center](https://docs.rakwireless.com/Product-Categories/WisBlock/RAK1906/Overview/#product-description).
