Trb145 data to server using lua scripts

NETWORKING SOLUTIONS
1

Hello,

I am trying to figure out how to use lua scripts with the data to server service. Is there an example somewhere on how to use it?

What I am trying to do is to write a lua script that is able to read a value from a modbus RTU unit (for example a digital poweer meter) every 15 seconds and send a POST call or an MQTT data if the last value read differs from the previous value by more than 10%.

Is this feature good for this purpose?

Thanks,

Gabor

2

Hi, I am working on a similar problem. This is the sample, that could be downloaded from the WebUI. The script can be customized via Visual Studio. However I haven’t tried it yet. Also I don’t know if this specific function has to called at some specific point or if it works on itself.

--Available variabes:
-- data_sender.section - config section name
-- data_sender.version - LUA plugin version
-- env - data to be formated
--
--String value must be returned

function handle_format_request(data)
	local key, value
	local result = ""

	for key, value in pairs(data) do
		result = result .. "\"" .. key .. "\": \"" .. value .. "\","
	end

	return "{" .. result .. "}"
end