@Pseudomizer , Is the esp8266 on a breadboard or is it part of a commercial product like HUZZAH or nodemcu ? I ask because the esp devices can reset themselves from a brownout condition during the WiFi transmit if the power supply circuit is not up to handling the momentary 'high current draw' requirements of the radio. From reading www.esp8266.com, breadboard circuits have caused many hours of troubleshooting enjoyment with the esp8266 parts.

I replace the battery packs on these with 2 Amp cell phone charger power supplies. I have 8 under power 24/7 for months with no problems. They are available from multiple vendors.
http://www.aliexpress.com/item/Free-shipping-ESP8266-ESP-12-serial-WIFI-Industrial-stable-version-A-full-test-board-Full-IO/32260095422.html?spm=2114.01020208.3.49.0YGvDs&ws_ab_test=201556_7,201527_4_3_2_1_4_71_72_73_74_75,0_0

Thank you hek and Yveaux. I thought I had missed something obvious. For the present with openHAB 1.7.1, a small piece of the wireless sensor data super highway of the future is still under construction! In that case I will certainly study the MySensors gateway to MQTT broker examples closely.

Thanks hek, OpenHAB 1.7.1 is stable for me. I will probably wait for openHAB 2.0 to get closer to production status before wading in.

I understand serial binding.
I understand MQTT binding.

I am missing something stupid easy in understanding ethernet binding.
Do I include the http binding in the addons folder?

A serial connected device is defined in an openHAB items file like:
Switch HardwareButton "Bell" (Entrance) { serial="/dev/ttyS0" }

I just cannot find an example of what an ethernet connected device would use in place of the "serial" definition.

Is your setup using this gateway like:

MySensors network <=>Gateway <=> Format conversion program <=> MQTT broker <=> openHAB

For some reason, I had assumed that the results of the gateway could be used directly in openHAB.

Thanks! Are you using this gateway with a controller or is it a proof of concept?

It is fun to watch the states respond in a telnet session. I am having trouble finding any mention on how to use this with a controller.

I would like to use this tutorial for MySensors in the openHAB program:
http://forum.mysensors.org/topic/1194/tutorial-openhab-with-serial-gateway

I have the ESP8266 WiFi gateway working over a telnet session in Putty.

Is there a way to have openHAB communicate over telnet like a hardwired serial interface?

Has anyone used this yet?
https://github.com/openhab/openhab/pull/2832

I will report a successful first experience with MySensors using the esp8266 WiFi Gateway and a digital switch nRF24L01+ MySensors node.
Thank you Yveaux and hek! nRF24L01+ nodes are the only way to go for battery power!
I look forward to learning more about the MySensors architecture.
I am currently using openHAB as my controller.

For the MQTT library, I will vote for the https://github.com/Imroy/pubsubclient library if you decide to create a MQTT version of the WiFi Gateway. I have this library installed on 8 esp8266 nodes operating for over two months without any problems.

The knolleary version has had some recent updates since I installed the lmroy version, so it may work fine with Mosquitto MQTT 3.1.1 instead of MQTT 3.1 only.