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How to connect Industrial Raspberry Pi EG500 to ThingsBoard?
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How to connect Industrial Raspberry Pi EG500 to ThingsBoard?

Industrial Raspberry Pi EG500 Elastel EG500 is an Industrial Edge Computing Gateway powered by Raspberry Pi CM4.

Perfect for use as an IoT Gateway, data acquisition device, Industrial Controller, or for Edge Computing applications.

Designed for IIoT applications, it features:

  • Industrial interfaces: 2× GbE, 2× USB, 1× RS485, 1× RS232, 6× DI, 6× DO, and 3× ADC
  • Connectivity options: 4G, LoRa, Wi-Fi/BLE, WiFi HaLow (802.11ah WiFi)
  • Enclosure: Truly IPC-grade stability and ruggedness

In this tutorial we will use Elastel EG500 as edge gateway to collect data from RS485 Modbus temperature & humidity sensor, also collect the DI status value and control the DO on/off which wiring a LED light. EG500 will connect to ThingsBoard for data visualizing and controlling the LED.

Prerequisites

To continue with this guide, you will need to have access to ThingsBoard Professional Edition. The easiest way is to use ThingsBoard Cloud server. The alternative option is to install ThingsBoard using installation guide.

Also, you will require the following items:

  • An Elastel EG500 device
  • An RS485 Modbus Temperature & Humidity sensor
  • A LED light

Wiring scheme

wiring1 wiring2

Create device on ThingsBoard

1. In our example, we use ThingsBoard Cloud

Create an account and then log in.

thingsboard_login


2. Create a device on ThingsBoard

Go to the “Devices” page of the “Entities” section, click on the “+” icon button in the top right corner of the table and then select “Add new device” from drop-down menu.

add_new_device


3. Enter a device name (e.g., Elastel_EG500) and click “Add”.

add_device_name


4. Copy and save the Access token

It will be needed in further device configuration for connecting to ThingsBoard cloud.

access token

Elastel device configuration

In this step, we will configure Elastel EG500 to collect data from RS485 Modbus sensor and DI/DO status value. Elastel devices has prebuilt Elastel IIoT gateway software ElastPro which provide web-based programs for easy configuration and data collect setup.

1. Launch ElastPro

To launch ElastPro, follow this guide.

2. Enable Data Collect

Go to the Data Collect -> Basic, enable the Data collect function, and configure the Collect period, Report period, then click the “Apply settings” button.

enable data collect


3. Configure the RS485 Serial port for Modbus sensor data collect

Go to the Data Collect -> Interfaces to enable the COM1 RS485 for connecting the RS485 Temp&Humidity Sensor, configure the related parameters, then “Apply settings”.

rs485 interface setting


Go to Data Collect -> South Devices -> Modbus Rules to configure the collect Modbus data from Temp&Humidity Sensor, then “Apply settings”.

Modbus rule settings


4. Configure the IO port for collect DI status and control DO status

Go to Data Collect -> South Devices -> IO, add DI and DO Setting rules, configure the relevant parameters and click the “Apply settings”.

IO settings

Connect device to ThingsBoard

Go to the Data Collect -> North Apps -> Reporting Center to configure the connection to ThingsBoard platform via MQTT.

Connect mqtt to ThingsBoard

Note: If using custom MQTT credentials on ThingsBoard, set them under Next: Credentials → MQTT Basic during device creation, and use those here.

Refer to the ElastPro User Manual for more detailed configuration options.

Check data on ThingsBoard

Once connected, data will appear under the device's latest telemetry tab in ThingsBoard.

check data on thingsboard


You can also view the data on EG500's local dashboard.

data on device local

Create Dashboard

Now let's display the data from the Elastel EG500 device on the dashboard. Learn more how to work with the dashboard here.

Go to the “Dashboards” page, click on the “+” icon button in the top right corner of the table and then select “Create new dashboard” from drop-down menu. Enter the Title of the dashboard, then click “Add”.

add dashboard


On the Dashboard edit page, click the “+ Add new widget” button to add widget for displaying our telemetry data.

add widget


Select the appropriate widget template and configure the data source accordingly. For example, choose a Value card to display the “Temperature” data and add the “Temperature” data key as a data source from the EG500 device we created.

add temperature widget


After completing the widget setup, click the “Add” button. We have now added a widget that displays the real-time temperature value.

temperature widget


Similarly, add widgets to display humidity and door state data, and add a “Power button” widget to control turning on/off the indicator light. After completing the dashboard configuration, click the “Save” button.

Now we have a visualizing dashboard for displaying data and controlling the DO (LED light).

add other widget

Demonstration of the result

Conclusion

By following this guide, you can easily integrate Elastel IIoT gateways with ThingsBoard. Elastel’s easy-to-use web UI and ThingsBoard’s powerful visualization tools make the edge-to-cloud connection seamless.