Documents in TomyGateway directory will help you to understand the architecture of this program.
Raspberry Pi can run this Gateway.
http://www.youtube.com/watch?v=INa5YznfR-8&feature=youtu.be

• QOS Level 0 and 1
• CONNECT, WILLTOPICREQ, WILLTOPIC, WILLMSGREQ, WILLMSG
• REGISTER, SUBSCRIBE, PUBLISH, UNSUBSCRIBE, DISCONNECT
• CONNACK, REGACK, SUBACK, PUBACK, UNSUBACK
• ADVERTIZE, GWINFO

####1) Minimum requirements

• Three XBee S2 devices, one coordinator, one gateway and one client.
• Linux ( Windows can not execute this program.)
• pthread, rt liblaries to be linked.

####2) How to Build

$ make

Makefile is in TomyGateway directory.
TomyGateway (Executable) is created in Build directory.

####3) Start Gateway

$ TomyGateway 1 /dev/ttyUSB0  ["localhost"] [1883]

argv 1: Gateway Id (numeric 1 - 255)
argv 2: Device which XBee dongle connected
argv 3: Broker IP Address ( default value "localhost" )
argv 4: Port No ( default value 1883 )

Serial interfacing of gateway.
Coordinator is default setting.

[BD] 6   57600 bps
[D7] 1   CTS-Flow Control
[D6] 1   RTS-Flow Control
[AP] 2   API Enable

Other values are defaults.

####1) Prepare Bootup SD card

• Download img.zip file from
  (https://github.com/TomoakiYAMAGUCHI/MQTT-S-Gateway

• Unzip archilinux-mqtt-sn-gateway4RaspberryPi.img.zip

• Copy img file to SD card (4GB)

####2) How to connect XBee to RaspberryPi RaspberryPi XBee
3.3V Pin 1 ---------- Pin 1 Vcc
GND Pin 6 ---------- Pin 10 GND
Tx Pin 8 ---------- Pin 3 Rx
Rx Pin 10 ---------- Pin 2 Tx

####3) How to start

• Boot up RaspberyPi & login via ssh.
  $ ssh 'RaspberryPi IP Address' -p 22022 -l gw
  password is gw.
  Raspberry IP address is asigned by DHCP.

• Change gw password. (gw can use sudo command)
  root's password is root.

• Invoke Gateway
  Invoked automatically by systemd.
  How to stop the automatical invoke.
  > sudo systemctl disable tomygateway.service
  How to start the gateway by manual operation.
  > ./TomyGateway.sh
  or
  > ./TomyGatewaySilent.sh

   check the shell script for more information     
   IP address 85.119.83.194 is test.mosquito.org.
  

###Contact

• Author: Tomoaki YAMAGUCHI
• Email: tomoaki@tomy-tech.com
• Twitter: @ty4tw