Perquisite

• Access to a Zoho IoT application
• A connected gateway either using Zoho IoT Agent or using Manufacturer Application
• A modbus device physically connected to the gateway either through RS485 or Ethernet

Connecting a Modbus Device

Adding a Modbus Device

1. Using the Device Gallery option
2. By defining your own device product

Adding a Modbus Device using the Device Gallery Option

1. Access the End Application.
   
   
   
   
2. Select Devices > Devices in the left navigation pane.
   
   
   
   
3. Click Add Device.
   
   
   
   
4. Select Add Using Product Gallery (Devices) and click Proceed.
   
   
   
   
5. In the device gallery, browse, filter, or search for your device.
   
   
   
   
6. Click the required device product. For this example, TM7400 is selected.
   
   
   
   
7. On the device product information page, click Import and Proceed.
   
   
   
   
8. In the Add Device form, provide the required information in the relevant fields.
   

   Example:
   

   Model Type: Create New Model (This toggle appears only if a device model already exists)
   

   Model: Energy Meter
   

   Name: MyTM7400
   

   Edge Key: tm_001
   

   
   
   
   

   

   Learn more about each field.

9. Click Proceed. A new device with the give name will be added.
   
   
   
   
10. Click View Device. You'll be redirected to the peripheral device's information page.
    
    
    
    
11. In the Onboard Assistance, click Proceed.
    
    
    

Adding a Modbus Device using the  By Defining your own device product option

1. Access the End Application.
   
   
   
   
2. Select Devices > Devices in the left navigation pane.
   
   
   
   
3. Click Add Device.
   
   
   
   
4. Select Add by Defining Your Device Product and click Proceed.
   
   
   
   
5. In the Product Details section, provide information about the device product.
   

   Example:
   

   
   Name: EM 8000
   

   
   Device Type: Peripheral Sensor
   

   
   Peripheral Protocols: Modbus RTU, Modbus TCP
   
   

   

   Learn more about the fields.

   Notes:
   Before filling in the details, it is highly recommended to read Understanding Device Product document.
   This step defines a device product, not a device instance. 
   For Modbus devices, Peripheral Sensor must be selected as the device type.

   
   
6. Click Add. The device product will now be created.Next, add datapoint definitions and configure Modbus registry mappings for each datapoint:
7. Click Add Datapoint Definitions to open the Import Datapoint form.
8. Click Add New Datapoint Group.
9. Select Import from Gallery and click Next.
10. Choose the group containing datapoints relevant to your peripheral device’s parameters (for example, Energy Monitoring) and click Import.
11. Select the required datapoint definitions and click Import. For this illustration, only Active Power is imported.
12. Once the datapoint definitions are imported, the Modbus registry mappings become available.
13. Select the datapoint that requires registry updates and click Edit.
14. Enter the necessary details (usually found in your device’s data sheet) and click Update.
15. After updating the registry, click Proceed.
16. In the new device form, provide the required details.
    

    Example:
    

    Model Type: Create New Model (This toggle appears only if a device model already exists)
    

    Model Name: Energy Meter
    

    Edge Key: em_001
    

    

    Learn more about each field.
17. For the Connected Gateway field, select the gateway device you added in the application to represent the actual gateway in your setup.
18. Click Add. A new device with the give name will be added.
19. Click View Device. You'll be redirected to the peripheral device's information page.
20. In the Onboard Assistant, click Proceed.