4.2 Extended Output via UART (Available in Both Configuration Modes)

The extended output provides real-time sensor data through the UART interface. Basic output, including raw measurement and delta values, is available in slide switch and UART configuration modes. However, selecting which values are displayed—current, delta, or both—is only supported in Enhanced Configuration Mode (ECFG ON).

When the extended output is enabled, the MTCH9010 sends diagnostic information to the terminal window, which helps confirm the device is operating correctly and provides insight into real-time sensor performance.

Here is what the output includes:

1. Firmware version

   The first line shows the version of the firmware currently running on the device:

   Firmware vX.Y.Z

   • X: Major version
   • Y: Minor version
   • Z: Patch version
2. Reference and threshold values

   These are shown on a single line:

   <reference_value> <liquid_detection_threshold>

   • Reference value: The baseline reading from a dry sensor
   • Threshold: The value at which the device will consider liquid to be present
3. Real-Time sensor data

   During normal operation, the device outputs two values in each sensing cycle:

   <standard_measurement> <delta_measurement>

   • Standard measurement: The latest reading from the sensor
   • Delta: The difference between the standard reading and the reference value

Depending on the configuration, the output can show both values or only the current or delta.

For power monitoring, the evaluation board includes a dedicated header that allows an external ammeter to be inserted in-line for measuring the current drawn by the MTCH9010.