Add README.

Author: brocaar

README.md

@@ -1,4 +1,45 @@
 # LoRa Semtech Bridge
 
+[![Build Status](https://travis-ci.org/brocaar/lora-semtech-bridge.svg?branch=master)](https://travis-ci.org/brocaar/lora-semtech-bridge)
+[![GoDoc](https://godoc.org/github.com/brocaar/lora-semtech-bridge/cmd/semtech-bridge?status.svg)](https://godoc.org/github.com/brocaar/lora-semtech-bridge/cmd/semtech-bridge)
+
 *LoRa Semtech Bridge* is a service to handle LoRa gateway (Semtech UDP protocol)
-connections and communication with the ``loraserver``.
+connections and communication with the ``loraserver`` (https://github.com/brocaar/loraserver).
+
+## Installation
+
+
+## Getting started
+
+1. First install ``semtech-bridge``:
+
+``` bash
+go get github.com/brocaar/lora-semtech-bridge/...
+```
+
+2. Make sure you have a MQTT server running. Mosquitto is a good option:
+   http://mosquitto.org/.
+
+3. Start the ``semtech-bridge`` service. The ``--help`` argument will show
+   you all the available config options. When everything is setup correctly
+   (your gateway is configured to send data to ``semtech-bridge``), you
+   should see ``PullData`` packets coming in. E.g.
+
+``` bash
+$ ./bin/semtech-bridge
+INFO[0000] backend/mqttpubsub: connecting to mqtt server  server=tcp://127.0.0.1:1883
+INFO[0000] starting gateway udp listener                 addr=0.0.0.0:1700
+INFO[0006] incoming gateway packet                       addr=192.168.1.4:54993 type=PullData
+INFO[0006] backend/mqttpubsub: subscribing to topic      topic=gateway/1dee08d0b691d149/tx
+INFO[0006] outgoing gateway packet                       addr=192.168.1.4:54993 type=PullACK
+INFO[0006] incoming gateway packet                       addr=192.168.1.4:51926 type=PushData
+INFO[0006] stat packet received                          addr=192.168.1.4:51926 mac=1dee08d0b691d149
+INFO[0006] outgoing gateway packet                       addr=192.168.1.4:51926 type=PushACK
+INFO[0006] backend/mqttpubsub: publishing message        topic=gateway/1dee08d0b691d149/stats
+```
+
+4. Now setup the ``loraserver`` service! https://github.com/brocaar/loraserver
+
+## License
+
+This package is licensed under the MIT license which can be found in ``LICENSE``.