ECargosens

Current design: central unit, measurement unit

The load monitoring system eCargosens (hereinafter - “System”) for vehicles with air suspension is designed to monitor the load of every axis of the vehicle’s chassis based on the measurement of the air pressure in the air suspension’s system.

The eCargosens system consists of one eCargosens DS central unit (hereinafter - “central unit”) and several measurement units or eCargosens Air sensors (hereinafter - “Sensor” or “Sensors”). The number of Sensors installed on the vehicle depends on the number of axes the vehicle has

The Sensors measure the air pressure and - subsequently - the weight (load). The central unit perfoms the function of receiving data from sensors via the BLE 5.0 LR channel (data transfer protocol - Escort BLE eCargosens) and their further transmission to a tracker device (for example, a GPS/GLONASS navigation terminal) via RS-485 interface (data transfer protocol - LLS).

More detailed technical specifications (central unit) are presented in the device's data sheet.

More detailed technical specifications (sensor) are presented in the device's data sheet.

Operating and data transmission principles

The Sensors must be connected to the air suspension system of the vehicle. They measure the air pressure in the air suspension and calculate the weight that is distributed onto a particular axis based on a calibration table that must be created and saved in their memory.

The Sensor(s) transmit their parameters to the central unit via Bluetooth 5.0 in accordance with the Escort BLE eCargosens data communication protocol.

The Sensors transmit their data packages every 2 seconds.

The air pressure is measured every 30 seconds but the measurement are filtered (median filtration 5) and then processed by a special algorithm.

The central unit then retransmits the data received from the Sensor(s) to a GPS tracker/gateway via the RS-485 interface in accordance with the LLS communication protocol.

The parameters transmitted by the Sensor(s):

- Weight or axle load in kg (provided that the calibration table is stored in a Sensor’s memory);

- Air pressure in Pa;

- Battery charge in V;

The parameters retransmitted by the central unit:

- Weight or axle load in kg (provided that the calibration table is stored in a Sensor’s memory); as received from the Sensor(s);

- Air pressure in Pa; as received from the Sensor(s);

- Battery charge in V; as received from the Sensor(s);

- RSSI as calculated by the central unit for every Sensor in particular;

Installation and configuration

Before installing the sensor you need to:

- Inspect the air suspension system;

- Measure the diameter of the tubes that connect the air springs of the air suspension and buy the fittings to be able to connect the Sensors’ tubes to the air suspension’s tubes;

The standard diameter of the Sensor’s tubes is ⌀ 10mm.

The Sensor’s connecting to the air spring is shown on the figures below:

Before installing the sensor be sure to write down their serial numbers and MAC addresses and what axis every Sensors is to be installed at:

Pairing Sensors with central unit

Once the sensors are installed, you need to pair them with the central unit and configure them.

To connect the central unit and configure it via the app, connect its red (PWR) and black (GND) wires to a power supply.

Run the app (available in AppStore and Play Market), ensure that the geolocation service of your smartphone is On and the app has the permission to access it. Enable the Bluetooth.

Android eCargosens: download here.

IOS eCargosens: download here.

Then select the language should it be necessary and press Start. Then tap on the central unit you need.

Scroll down and tap Sensor settings. Enter the integrator’s password (666666 by default)

Tap on the + button. Enter the user password (000000 by default). Then enter the MAC of the sensor.

Then enter the MAC of the sensor. You can add as many sensors as you need (up to 10 sensors to one central unit) .

To disconnect the sensor, press and hold it until the Disconnect button appears then press it and delete the sensor.

Sensor calibration

To calibrate the Sensor, you need to weigh the axis it is installed at when the vehicle’s semi trailer or trailer is empty and when it is loaded at around 30-40% of max load. The load must be placed in a fashion that would ensure that the weight is distributed between the axes more or less equally.

You will need vehicle scales. Put them on an even surface. Make sure that once the axis is placed on the scales it remains on the same level as the other axes.

Then write down the Pressure value and the weight value. You need two pairs of Pressure - Weight values to save them in every Sensor’s memory.

After that, open the app, connect the central unit, open Sensor settings menu and select the sensor you need to calibrate.

When you connect the Sensor for the 1st time, you will be required to set up a password. From there on every time you connect the sensor the app will require you to enter the previously set password.

Once the sensor’s menu is open, you can see its current readings. Tap on the Calibrate button to open the calibration menu.