==== Optical Rain Gauge (Hydreon Rain Gauge Model RG-15) ====

Manufacturer: Hydreon

Model Number: 15

User Manual: [[https://rainsensors.com/wp-content/uploads/sites/3/2022/07/2022.07.18-rev-1.000-rg-15_instructions.pdf|Here]]

Serial Data Configuration: Baud rate 9600, Data Bits 8, Parity None, Stop Bits 1.

=== How to Set Up ===

=== Parts ===

The Hydreon RG-15 has a few key components when it comes to setting up the instrument.
  *Sensor - Collects data
{{:atmos:citation:instruments:org151:screenshot_2026-06-04_151739.png?200|}}
  *Power Adapter - Connects to a 12V 2A DC Power supply
{{:atmos:citation:instruments:org151:screenshot_2026-06-04_151705.png?200|}}
  *Serial Adapter - Allows the Raspberry Pi to read sensor data
{{:atmos:citation:instruments:org151:screenshot_2026-06-04_151719.png?200|}}
  *Wires - At the end of the cord, there will be six (6) exposed wires of the following colors: 
{{:atmos:citation:instruments:org151:screenshot_2026-06-04_151729.png?200|}}
    * Orange - TXD
    * Green - Ground
    * Yellow - RXD
    * White - 3.3V Power
    * Red - Power (positive)
    * Black - Grounding power (negative)

=== Setting up the Probe ===

By now, you should have your Raspberry Pi computer completely set up, with a DAQ HAT. To continue, you will need:
  * A Serial to USB adapter (DB9-USB)

  - Connect the power adapter to a DC power supply as given above.
  - Connect the power adapter to the red and black wires
  - Connect the remaining wires to the serial adapter as given above.
  - If you have properly set up the ADPAA and DAQ HAT, you can now run the python program that coincides with your instrument and observe the data.