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Frequently Asked Questions (FAQ)

Important Note

After sending SET_PIN PIN=_probe_ready VALUE=0, the light on the sensor end will not turn on (under any circumstances). If the light is on or flashing, there is an issue with the EN pin wiring or configuration.

EN Pin Issues​

The light on the sensor end stays on or flashes when connected to the computer via USB

This indicates that the EN pin is not correctly connected to the mainboard control. Please check the wiring and configuration.

Pressure Value Fluctuations​

When connected to the computer via USB, the pressure value output by pressing the sensor sometimes increases and sometimes decreases

This is normal. The sensor supports both forward and reverse pressure detection, so the values may fluctuate positively and negatively.

Threshold Settings​

When connected to the computer via USB, the displayed current pressure value is unrelated to the threshold

The current pressure value reflects real-time detection data and is not directly related to the threshold setting. If the trigger pressure is too high, simply set a lower threshold.

Serial Port Debugging Commands​

After connecting to FLY-Alps via the serial port, the following commands can be used for debugging and configuration:

Common Commands​

CommandDescriptionExample
set <value>Set trigger sensitivity thresholdset 20000 (lower value = higher sensitivity)
vView current ADC valueOutputs ADC values before (a) and after (b) filtering
uvDisable continuous ADC outputStops real-time data refresh
rtView current sensitivity settingReturns the currently configured threshold

Usage Instructions​

Setting Sensitivity

  • Use the set command followed by a value, e.g., set 20000
  • A lower value makes the sensor more sensitive and easier to trigger
  • A higher value requires more pressure to trigger

Real-time ADC Value Monitoring

  • After sending the v command, the device continuously outputs ADC values
  • The output format includes data before (a) and after (b) filtering
  • Send the uv command to stop continuous output

Viewing Current Configuration

  • Use the rt command to view the current sensitivity threshold
Tip

It is recommended to test different sensitivity settings via the serial port tool before actual use to find the threshold that best suits your application scenario.

Using Other Sensors​

FLY-Alps supports the use of other sensors, but please note the following:

  • Refer to the image below to confirm the correct wiring of the sensor input end
  • After replacing the sensor, the trigger pressure value needs to be readjusted
  • After wiring, use the ALPS Pressure Module Configuration Tool to view the current sensor value and determine if it is functioning normally
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