Duplicate data when using Data to Server for Modbus to HTTP transfers

Hello, I’m using a RUT 956 with firmware RUT9M_R_00.07.09.4 and trying to use the Data to Server functionality to capture some sensor data coming from a Modbus RTU Server/Slave on the RS485 and post it on a HTTP server.

I think I have it all working, but on the server I receive the same reading over and over, even the timestamp is the same. The reading only eventually updates once after a couple of hours or when rebooting the device. If I disable the collection, or change any value on the data inputs of the collection, the changes are reflected on the JSON received by the HTTP server, but the “measurements” stay the same (same sensor readings, same timestamps, etc).

Another problem I have is that I didn’t find a way to send 2 different values coming from the same sensor. On the Modbus Client configuration, I’ve checked with the Test button and both requests are activated and working correctly, but the JSON sent to the server seems to only include the last enabled request on the list for a specific device.

I think this might be a bug, or maybe a broken database that needs to be reset, perhaps a concurrency problem on the communication via the RS485? If someone knows what it might be, or need additional details, please let me know.

Hello,

Apologies for a delayed response.

First, I’d suggest updating the device’s RutOS firmware to the latest 7.13.3 (if feasible, preferably with the “Keep settings” option unchecked, which will reset/delete all configurations after the update).

Secondly, to prevent the same data from being sent repeatedly to the server, please ensure that the “Store on change only” option is enabled in the Modbus Serial Client’s requests configuration section:

Regarding sending two different register values from the same Modbus server, it is indeed possible and should work as intended. Could you provide screenshots of your Modbus Serial Client and Data to Server configuration windows to understand your current setup better?

Best regards,