The statements from jmmorgan and Xander both look OK to me. mine is: Switch node1_sw1 "sw1" {mqtt=">[mysensors:MyMQTT/1/1/V_LIGHT:command:ON:1],>[mysensors:MyMQTT/1/1/V_LIGHT:command:OFF:0],<[mysensors:MyMQTT/1/1/V_LIGHT:command:MAP(1on0off.map)]"}

It did change the IP in the new sketch. I finally got it to ping, but I am not quite sure how. Probably too many different version of the gateway in effort to get it to work. Thanks

@hek said: You probably need to pick up some of the c++ basics first. There free online :book: and we linked a couple of physical ones on the API page. I would also recommend Beginning C in Arduino, which is a great start. It has practical examples you can test with your Arduino. Downside is that it has a terrible index and is pricey. Borrow it, don't buy it! ;)