Operation

The RAPT Laser Level Sensor is a BLE (Bluetooth Low Energy) device. It has been designed to maximise battery life.

In order to maximise both battery life and functionality, the RAPT Laser Level Sensor has several modes of operation.

These can be viewed and changed in the RAPT Brew app.

The modes are accessed through the Setup option of the RAPT Laser Level Sensor device screen in the RAPT Brew app.

The RAPT Laser Level Sensor can pair with the RAPT Brew App. It is also designed (and ideally used) to be paired with the RAPT Kegerator Screen Board

In the RAPT Brew App Laser Level Sensor Device screen, you will see the last known value and a visual representation of the level

You can select to view Charts in order to see a visual representation of the keg level over time

The Setup button allows you to choose the Mode for the RAPT Laser Level Sensor

Buttons and LED Indicator

Modes

The RAPT Laser Level Sensor has 4 modes of operation. The selected mode can have a significant effect on battery life. To see the Mode Indicators, press the Power button on the RAPT Laser Level Sensor once. The current mode is also displayed in the Setup option of the RAPT Laser Level Sensor Device screen in the RAPT Brew App.

Smart Mode

This is the default mode. In Smart Mode, the RAPT Laser Level Sensor will broadcast a Bluetooth signal frequently enough for the RAPT Brew App to detect it. If you will be using the RAPT Laser Level Sensor in conjunction with the RAPT Brew App instead of bonded to the RAPT Kegerator Screen Board or another RAPT Bluetooth Device, then Smart Mode should be selected

Ultra Low Energy Mode

In Ultra Low Energy Mode, the RAPT Kegerator Screen Board will not broadcast a Bluetooth signal with enough frequency to be picked up by your phone. It must be bonded to the RAPT Kegerator Screen Board or another RAPT Bluetooth Device before Ultra Low Energy Mode is selected.

Ultra Low Energy Mode will dramatically increase battery life.

Important Note: The only way to exit Ultra Low Energy Mode is by physically selecting a different mode on the RAPT Laser Level Sensor

Session Mode

Session Mode cannot be manually selected. Session Mode will be entered automatically if the RAPT Kegerator Screen Board or another RAPT Bluetooth Device, detects a volume change in line with a frequent decrease in volume of the keg. Session Mode will end automatically once the volume of the keg is detected to drop less frequently.

Live Stream Mode

Live Stream mode can be manually toggled using the Live Stream button in the RAPT Brew App (Pro subscription only)

Live Stream mode will continuously broadcast telemetry until toggled off or if the RAPT Laser Level Sensor. This can be useful for filling kegs or other activities which require real time telemetry.

RAPT Laser Level Sensor LED Indicators

The LED on the top of the RAPT Laser Level Sensor indicate the operational status of the device. The LED is not illuminated in normal use unless a button is pushed or the RAPT Laser Level Sensor sends telemetry or receives data (such as a firmware update).

Operation Indicators

Mode Indicators

To see the Mode Indicators, press the Power button once

Operation

Turn RAPT Laser Level Sensor on or off: hold the Power button until three fast red or green LED flashes are displayed. Green indicates the device is booting up. Red indicates the device is powering off

Enter Bluetooth Pairing mode: When the RAPT Laser Level Sensor is powered on, hold the Power button until the LED blinks blue

Display current Mode: Press the Power button once (while the device is on)

Take Reading and send Telemetry: Press the Bluetooth button once. NOTE: Telemetry will not be received unless the device is Registered

Factory Reset: Click and hold Power button then click and hold Bluetooth button. Hold both buttons until the LED blinks red several times