Pebble Install Guide

Know these 4 things first

• Which Pebble model you are installing: eco1, eco2, or Pebble Plus.
• Which sensor type the site is using: ultrasonic, submersible, or existing analog sensor.
• Whether the site uses one tank only, a main and reserve setup, or a larger RS485-based setup.
• If Pebble Plus is being used, whether each RS485 device has already been commissioned to the intended shared bus standard and a unique address.

Simple meanings

Monitoring Device
The Monitoring Device is a record you create, that needs to be Linked to the physical Pebble Monitoring device that connects to the tank.

Pebble Unit
The Pebble Unit is the physical hardware installed on site.

Link Code
The Link Code connects the physical Pebble Unit to the correct Monitoring Device.

Main Tank
The Main Tank is the primary tank linked to the Monitoring Device.

Reserve Tank
The Reserve Tank is the backup tank if the site uses one.

Portal
The Portal is the website Dashboard where you monitor and manage your tank status.

Ultrasonic sensor
An ultrasonic sensor sits above the water and measures the level by sending a sound pulse down to the water and timing the return.

Submersible sensor
A submersible sensor goes down into the tank and measures water pressure from inside the tank instead of reading from above. One example is the PBL300. It is a sealed drop-in sensor made for use in water. PBL300 sensors are sold in different versions, so always check the signal type before wiring. Some versions use 4-20mA, 0-5V, or 0-10V. The RS485 / Modbus version can be used with Pebble Plus when configured correctly.

RS485 bus
The RS485 bus is the shared wired sensor line used on Pebble Plus. In simple terms, it lets the controller talk to compatible sensors on the same wiring run. Most current Pebble Plus installs use ultrasonic sensors on the RS485 bus, and compatible RS485 / Modbus submersible sensors such as the PBL300 can also be used when the correct version is selected.

Before the installer finishes on site, the Monitoring Device should already exist in the portal and be ready to Link.

• The Monitoring Device has already been created.
• The Device Serial is visible in the portal.
• The Link Code is available.
• The Main Tank is already linked or ready to be linked.
• If the site uses a reserve tank, that requirement is already understood before setup begins.

Log in using the access code setup1234, then open Link Device first.

• Link Code: Enter the Link Code from the portal.
• Confirm the match: Make sure the correct Monitoring Device is shown before continuing.
• Save: Save the Link before moving on to Connection Setup.

After the Link is saved, continue with Connection Setup and then Sensor Setup.

After the Link is complete, open Connection Setup.

• Wi-Fi sites: Enter the normal site Wi-Fi name and password.
• Mobile sites: Enter the mobile APN details if required and choose the correct connection method.
• Update timing: Choose how often the device should send updates and how much the level must change before sending a new reading.

Save the connection settings before moving on to Sensor Setup.

Only for units with mobile service

Some Pebble units include a mobile communication module. These units can send updates through the mobile network instead of relying only on site Wi-Fi.

• Make sure the SIM card is installed and active.
• In Connection Setup, enter the mobile APN details if required.
• Use the communication setting that matches the install.
• Run the mobile connection test before leaving the site.

Sensor Setup is where you tell Pebble what type of sensor is connected and where you prepare the live reading test.

• Choose the matching quick setup if one applies.
• Confirm the sensor type for each reading.
• If used, confirm how the tank-top switch is connected.

Use these tools when an RS485 device needs to be commissioned or corrected before the live bus is finalized. This is most common when a device arrives with the wrong address, the wrong communication speed, or another setting that must be corrected before normal operation.

• Sensor Number Tools: Use this to read, assign, and scan sensor numbers for RS485 ultrasonic and RS485 submersible sensors.
• Analog Sensor Number Tools: Use this to read, assign, and scan addresses for RS485 analog input modules.
• Switch Box Service: Use this only if the tank-top switch box needs service or address recovery. In normal installs, the switch box address is usually pre-configured.
• RS485 Ultrasonic Service: Use this for ultrasonic address recovery, communication-speed recovery, force-9600 actions, and diagnostics.
• Submersible Sensor Service: Use this for submersible sensor address work, communication-speed changes, zero-offset correction, save actions, and related diagnostics.

If the installation uses Pebble Plus and any RS485 device is not responding correctly, open the RS485 Wiring Guide and confirm topology, termination, polarity, grounding, and branch length before assuming the device is faulty.

• Check reading now: Use the test button to confirm a live reading appears.
• Main and Reserve: If using eco2, test both the main and reserve readings.
• Tank-top switch: If the setup uses a tank-top switch, test that the status changes when the switch is triggered.
• RS485 commissioning: If an RS485 device needs a corrected address or bus speed, use the matching service page before final testing.
• Submersible offset: If a submersible sensor communicates correctly but reads consistently off, review and correct the offset value in the Submersible Sensor Service page.
• Existing analog sensor: For analog installs, use the current electrical value tools to confirm the live signal and help set the empty and full calibration points.

After all readings and service actions are confirmed, save the settings. The device will return to normal operation and continue sending updates based on the setup you entered.

On Pebble Plus, all commissioned RS485 devices on the live bus should now have unique addresses and be using the intended shared bus standard before you leave the site.

Pebble uses the LCD screen and the LED blink pattern together to show status and the next action to take. Use this guide to match the device message with the correct next step.

LED pattern guide