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1.Return CONNACK instead of the broker when the gateway receives CONNECT while the client is Sleep or Awake mode. 2.Define the max size of a que for PUBLISH while the client state is Asleep mode. Despose packets when the que is full of packets. 3.Return PUBACK or PUBREL to the broker when the client is Asleep or Awake. Signed-off-by: tomoaki <tomoaki@tomy-tech.com> Signed-off-by: tomoaki <tomoaki@tomy-tech.com>
MQTT-SN requires a MQTT-SN Gateway which acts as a protocol converter to convert MQTT-SN messages to MQTT messages. MQTT-SN client (UDP) can not communicate directly with MQTT broker(TCP/IP).
step1. Build the gateway
$ git clone https://github.com/eclipse/paho.mqtt-sn.embedded-c
$ cd paho.mqtt-sn.embedded-c/MQTTSNGateway
$ make
$ make install
$ make clean
MQTT-SNGateway, MQTT-SNLogmonitor and param.conf are copied into ../ directory.
step2. Execute the Gateway.
$ cd ../
$ ./MQTT-SNGateway [-f Config file name]
How to Change the configuration of the gateway
../gateway.conf Contents are follows:
# config file of MQTT-SN Gateway
BrokerName=iot.eclipse.org
BrokerPortNo=1883
BrokerSecurePortNo=8883
ClientAuthentication=NO
#ClientsList=/path/to/your_clients.conf
#RootCAfile=/path/to/your_Root_CA.crt
#RootCApath=/path/to/your_certs_directory/
#CertKey=/path/to/your_cert.pem
#PrivateKey=/path/to/your_private-key.pem
GatewayID=1
GatewayName=PahoGateway-01
KeepAlive=900
#LoginID=your_ID
#Password=your_Password
# UDP
GatewayPortNo=10000
MulticastIP=225.1.1.1
MulticastPortNo=1883
# XBee
Baudrate=38400
SerialDevice=/dev/ttyUSB0
ApiMode=2
BrokerName to specify a domain name of the Broker, and BrokerPortNo is a port No of the Broker. BrokerSecurePortNo is for TLS connection.
MulticastIP and MulticastPortNo is a multicast address for ADVERTISE, GWSEARCH and GWINFO messages. Gateway is waiting GWSEARCH multicast message and when receiving it send GWINFO message via Broadcast address. Clients can get the gateway address (Gateway IP address and GatewayPortNo) from GWINFO message by means of std::recvfrom(),
Client should know the BroadcastIP and PortNo to send a SEARCHGW message.
GatewayId is defined by GWSEARCH message.
KeepAlive is a duration of ADVERTISE message in seconds.
when ClientAuthentication is YES, see MQTTSNGWClient.cpp line53, clients file specified by ClientsList is required. This file defines connect allowed clients by ClientId and SensorNetwork Address. e.g. IP address and Port No.
** How to monitor the gateway from remote. **
Uncomment line32 in MQTTSNGWDefined.h.
//#define RINGBUFFER // print out Packets log into shared memory./"
$ make
$ make install
$ make clean
restart the gateway.
open ssh terminal and execute LogMonitor.
$ ./MQTT-SNLogmonitor
Now you can get the Log on your terminal.