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Re: [paho-dev] Lua Client - attempt to index field 'client' (a nil value)
Hi Joacim,

unfortunately, we haven't heard from the author of the Lua client for a while.  It could be a problem in the client code.  I'll take a look if I get the chance.  If anyone out there is interested in looking at the Lua client, we'd like to hear from you.

Ian

On 09/11/13 08:00, Joacim wrote:
Hi,

Trying to get MQTT Lua client running on Micasaverde Vera 3 (home automation controller) but get problems.
I am new to Lua so maybe beginner's problem?!

Do you see anything strange?

Error:
Code: [Select all] [Show/ hide]
01      11/09/13 0:00:36.101    luup_log:62: SensorMqtt plugin: Enter sendToMqtt <0x2d773680>
01      11/09/13 0:00:36.101    luup_log:62: SensorMqtt plugin: Create MQTT Client <0x2d773680>
01      11/09/13 0:00:36.102    luup_log:62: SensorMqtt plugin: Connect to 192.168.1.21 and port 1883 <0x2d773680>
01      11/09/13 0:00:36.102    LuaInterface::CallFunction_Timer-5 function sendToMqtt failed [string "module("L_SensorMqtt", package.seeall)..."]:47: attempt to index field 'client' (a nil value) <0x2d773680>


The code:
Code: [Select all] [Show/ hide]
module("L_SensorMqtt", package.seeall)

-- Service ID strings used by this device.
SERVICE_ID = "urn:upnp-sensor-mqtt-se:serviceId:SensorMqtt1"

local mqttServerIp = nil
local mqttServerPort = 0

local MQTT = require("mqtt_library")
local SENSOR_MQTT_LOG_NAME = "SensorMqtt plugin: "

local function log(text, level)
	luup.log("SensorMqtt plugin: " .. text, (level or 50))
end

function startup(lul_device)
	_G["sendToMqtt"] = sendToMqtt
	-- Help prevent race condition ???
--	luup.io.intercept()

	SENSOR_MQTT_DEVICE = lul_device
	log("Initialising SensorMqtt", 1)

	--Reading variables
	mqttServerIp = luup.variable_get(SERVICE_ID, "mqttServerIp", SENSOR_MQTT_DEVICE)
	if(mqttServerIp == nil) then
		mqttServerIp = "0.0.0.0"
		luup.variable_set(SERVICE_ID, "mqttServerIp", mqttServerIp, SENSOR_MQTT_DEVICE)
	end
	
	mqttServerPort = luup.variable_get(SERVICE_ID, "mqttServerPort", SENSOR_MQTT_DEVICE)
	if(mqttServerPort == nil) then
		mqttServerPort = "0"
		luup.variable_set(SERVICE_ID, "mqttServerPort", mqttServerPort, SENSOR_MQTT_DEVICE)
	end
	log("Start - Preparing worker thread", 1)
	-- Prepare the worker "thread"
	luup.call_delay("sendToMqtt", 20, "")
	log("Done - Preparing worker thread", 1)
end

function sendToMqtt(luup_data)
	luup.log(SENSOR_MQTT_LOG_NAME .. "Enter sendToMqtt", 1)
	luup.log(SENSOR_MQTT_LOG_NAME .. "Create MQTT Client", 1)
	luup.log(SENSOR_MQTT_LOG_NAME .. "Connect to " .. mqttServerIp .. " and port " .. mqttServerPort, 1)
	mqttServerPort = tonumber(mqttServerPort)
	local mqtt_client = MQTT.client.create(mqttServerIp, mqttServerPort)
	
	luup.log(SENSOR_MQTT_LOG_NAME .. "Connect MQTT Client", 1)
	mqtt_client:connect("Vera")
	
	luup.log(SENSOR_MQTT_LOG_NAME .. "Publish MQTT message", 1)
	mqtt_client:publish("Vera/Test", "*** Vera test start ***")
	
	--mqtt_client:subscribe({ args.topic_s })
	
	luup.log(SENSOR_MQTT_LOG_NAME .. "Destroy MQTT Client", 1)
	mqtt_client:destroy()
	
	luup.log(SENSOR_MQTT_LOG_NAME .. "Done with MQTT", 1)
	
	luup.call_delay("sendToMqtt", 10, "")
	luup.log(SENSOR_MQTT_LOG_NAME .. "Leaving sendToMqtt", 1)
end
 
 
I would be happy for some ideas on what’s wrong
 
Regards
Joacim
 
 
 
 


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