Modbus to LwM2M
LwM2M Router App
Advantech Czech s.r.o., Sokolska 71, 562 04 Usti nad Orlici, Czech Republic
Document No. APP-0088-EN, revision from 12th October, 2023.
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Used symbols
Danger – Information regarding user safety or potential damage to the router.
Attention – Problems that can arise in specific situations.
Information – Useful tips or information of special interest.
Example – Example of function, command or script.
Changelog
1.1 Modbus to LwM2M Changelog
v1.0.0 (2020-08-28)
- First release.
Router App Modbus to LwM2M
2.1 Description
This Router app is not contained in the standard router firmware. Uploading of this router app is described in the Configuration manual (see ChapterRelated Documents).
Modbus to LwM2M router app provides seamless communication between Modbus/TCP devices and LwM2M device. LwM2M works as Modbus/TCP master to communicate with Modbus/TCP devices.
2.2Installation
The latest version of Modbus to LwM2M router app can be downloaded from the Engineering Portal[EP] at https://icr.advantech.cz/products/software/user-modules.
In the GUI of the router navigate to Customization -> Router Apps page. Here choose the downloaded module’s installation file and click to the Add or Update button.
Once the installation of the module is complete, the module’s GUI can be invoked by clicking the module name on the Router Apps page. Figure1shows the main menu of the module. It has the LwM2M, Mapping Table and Log menu items. To return back to the
router’s web GUI, click on the Return to Router item.
2.3 Module Configuration
Configuration of the router app can be done on the LwM2M page. This configuration page is shown in Figure2. There are two sections on the page, LwM2M Settings, and Modbus TCP. The configuration items are described on the page next to the items. Do not forget to click the Save button below to save changes made on the page.
2.3.1 Configuration Uploading
Configuration of Modbus TCP and LwM2M devices mapping can be imported by a CVS file. Format of this file is shown in Figure3and the key columns are described in Table1. Separator (delimiter) for the CSV file is a comma.
To import this file, go to LwM2M configuration page, click on the Upload Config button, choose the file, and then click the Upload button. If uploaded successfully, click the Return button and finally click on the Save button LwM2M on the bottom of the configuration page. The new mapping configuration will take effect immediately.
| Column | Field | Description |
| A | IPSO SO | LwM2M Object ID |
| B | Name | The name to identify the mapping. |
| G | Address Start | Designate the Modbus to starting address for the Modbus registry. |
| H | Data Length | For range 1 9999 or 10000 19999, the unit is bit(s). For range 30001 39999 or 40000 49999, the unit is word(s). |
| I | Designator | Designate LwM2M Object. Include Object ID, Short ID and Resource ID. Format: /Object_ID/Short_ID/Resource_ID |
| Q | Data Type | LwM2M data type with options: •7 Boolean •4 IEEE, Reversed Word •1 Double Precision |
Table 1:Description of the Key Columns
2.4 Mapping Table
As shown in Figure4, the Mapping Table page just displays the mapping table of Modbus TCP and LwM2M devices. This table can be imported by a CSV file, see Chapter2.3.1.
2.5 Log Messages
The Log page displays the log messages of the LwM2M router app. This loggin can be enabled on the LwM2M configuration page, see Chapter 2.3.
[1] MC Manual Pages: https://linux.die.net/man/1/mc
You can obtain product-related documents on Engineering Portal at icr.advantech.cz address.
To get your router’s Quick Start Guide, User Manual, Configuration Manual, or Firmware go to the Router Models page, find the required model, and switch to the Manuals or Firmware tab, respectively.
The Router Apps installation packages and manuals are available on the Router Apps page.
For the Development Documents, go to the DevZone page.
Documents / Resources
 |
ADVANTECH LwM2M Router App [pdf] User Guide LwM2M Router App, LwM2M, Router App, App |