Connecting WEM3080 to ARDUINO by the MODBUS RTU interface

I did not find any information on the MODBUS protocol used by your device. Hoping for some help.

Thanks very much

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Hi,


Thank you very much for your answer. I haven't purchased this mod yet. I was waiting to know the characteristics of the modbus protocol, and also the data refresh rate. Indeed, I want to route the export of excess current coming from the solar in "real time". Of course I undertake not to communicate this protocol, it has no interest for me.


Br

Strongly recommend trying to understand the WiFi features of this energy meter.
If you only want to get the energy data locally, you do not need to use the traditional wiring RS485.
You can call the local API of the energy meter, it will return all data of the energy meter.
What you need to do is just a simple HTTP get. like this https://www.iammeter.com/docs/integrate-with-PVOutput


Or you can also set up an MQTT server, then configure the energy data to publish data to this server. Then you subscribe to the data from your client side. like this https://www.iammeter.com/docs/integrate-with-mqtt-server


Although the energy meter supports Modbus RTU and provides an RS485 interface, it is only used in the process of calibration before leaving the factory.
Honestly speaking, if you are only using the Modbus protocol of the energy meter, you may consider other products. Because the energy meter only supports the Modbus protocol will be cheaper.

Hello,
with local API the meter's readings are refreshed every 20 seconds and it's not enough for my application.
For the MQTT server, can you give me the refresh rate please?


I would really like to use this model both in MODBUS but also for the great applications that you have developed with it.


Thank you

Hi,
The data return in local API will be refreshed every 6 seconds, not 20 seconds.

For MQTT , the most frequent upload interval is also 6 seconds.
Please refer to https://imeter.club/topic/11#21-set-the-data-upload-interval

Hello,with local API the meter's readings are refreshed every 20 seconds and it's not enough for my application.For the MQTT server, can you give me the refresh rate please?I would really like to use this model both in MODBUS but also for the great applications that you have developed with it.Thank you

Could you release the MODBUS registers as I have developed a variable load control device, primarly used to heat hot water and only match Grid export and some of my clients do not have WIFI at the installation or the Metering Box is out of range of wifi signal.  The only register that would be required live export value, which would allow me to control the heating Element.   I know you mentioned cheaper options with only modbus output, but I cannot locate any, they all appear to be 10 times your price, there are some very cheap, but do not show bi-directional current flow.

thanks

Hi, we have send the modbus RTU protocol to your email that registerd in the forum.

Could you release the MODBUS registers as I have developed a variable load control device, primarly used to heat hot water and only match Grid export and some of my clients do not have WIFI at the installation or the Metering Box is out of range of wifi signal.  The only register that would be required live export value, which would allow me to control the heating Element.   I know you mentioned cheaper options with only modbus output, but I cannot locate any, they all appear to b

Hello.


Please send me the MODBUS documentation as well! Thanks a lot.


Hi, we have send the modbus RTU protocol to your email that registerd in the forum.

Thank you will review

Hi, we have send the modbus RTU protocol to your email that registerd in the forum.

Done. Please check your email.


Hello.Please send me the MODBUS documentation as well! Thanks a lot.

Please put the modbus info on the web site, it would make things much easier. (I plan to use it for places where wifi is not convenient or even possible.)

For some reason, we can not put this protocol on the internet.

I have sent the document to your registered email, please also help us do not post the protocol on the internet either, thanks.

Please put the modbus info on the web site, it would make things much easier. (I plan to use it for places where wifi is not convenient or even possible.)

Hello.Please send me the MODBUS documentation to me mail, Thanks. 

done

Hello.Please send me the MODBUS documentation to me mail, Thanks. 
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