文档二级目录222

pin=17
gpio.mode(pin,gpio.OUTPUT)

cfg={};cfg.ssid='leodroid';cfg.pwd='142857zuo';wifi.startsta(cfg);cfg=nil;

tmr.start(1,1000,function()
	print('Check STA Status:'..wifi.sta.getip())
	if(wifi.sta.getip()~='0.0.0.0') then
		tmr.stop(1)
		doMQTT()
	end
end)

function doMQTT()
	clientid = '/wifimcu1/hello'
	keepalive = 120
	username = ''
	password = ''
	mqttClt	= mqtt.new(clientid,keepalive,username,password)
	
	mqtt.on(mqttClt,'connect',function() 
		print('mqtt connected to server')
		QoS = mqtt.QOS0
		mqtt.subscribe(mqttClt,clientid,QoS)
		print('mqtt subscribe topic:'..clientid)
		mqtt.publish(mqttClt,clientid,mqtt.QOS0, 'hi,I am wifimcu1')
	end)
	
	mqtt.on(mqttClt,'offline',function()
		print('mqtt disconnected from server')
	end)

	mqtt.on(mqttClt,'message',cb_messagearrived)
	server = '106.14.44.95'
	port = 1883
	mqtt.start(mqttClt,server,port)
end

function cb_messagearrived(topic,data)
	--print('[Message Arrived]\r\ntopic:'..topic..' \r\nmessage:'..data)
	if data == "0" then
	   --stop()
		print(0)
		gpio.write(pin,gpio.HIGH)
	end
	if data == "1" then
		--go_forward()
		print(1)
		gpio.write(pin,gpio.LOW)
	end
end