Why is an Airmar Sensor Not Detecting?

The Airmar Ultrasonic Weather Station X2 Integration Guide outlines the required process for integrating an Airmar weather station with a NexSens X-Series data logger. If an Airmar weather station fails to detect after following the guide, below is a list of common reasons.

Issues During Detection

  • Issue #1: More than one RS-232 sensor is connected to the same sensor port.
    • Explanation: NexSens X-Series data loggers have (4) Universal Asynchronous Receiver Transmitters (UARTs). Two of them are dedicated RS-232 channels on ports P0 and P1. The remaining is a multiplexed RS-232 channel on port P1/P2. Since RS-232 sensors cannot have unique addresses, only one RS-232 sensor can be detected on each port.
      • Solution: Adjust the sensor configuration to avoid having more than one RS-232 sensor connected to a single port at a time.
  • Issue #2: Not all parameters shown in the X-Series integration guide are shown on WQData LIVE.
    • Explanation: The Airmar script on X-Series data loggers detects the NMEA0183 messages that correspond with specific parameter groups. If a NMEA0183 message outlined in the guide is not enabled, the data logger will be unable to read values from the sensor.
      • Solution: Relaunch the WeatherCaster software and enable the appropriate NMEA0183 messages. Then, run a new sensor detection.