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	3	+
	4	+= 1. Introduction =
	5	+
	6	+Dragino LoRa/LoRaWAN gateway support MQTT forwarding. It can forward the sensor data from LoRa network to MQTT server , and vice verse.
	7	+
	8	+== 1.1 Support Devices ==
	9	+
	10	+This MQTT forward instruction is for below devices:
	11	+
	12	+* Firmware Version > LG02_LG08-5.3.1580178039 [[Firmware Download>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]]
	13	+* LG01N, OLG01N (Warning: LG01-P LG01-S use another instruction: [[MQTT for LG01-P/LG01S>>url:https://wiki.dragino.com/index.php/Through_MQTT_to_upload_data]])
	14	+* LG02, OLG02
	15	+* LG308, DLOS8
	16	+* LPS8
	17	+* LIG16
	18	+* MS14 series if installed with the same firmware. (in this case, the MQTT forward will work , but no LoRa support)
	19	+
	20	+
	21	+= 2. Firmware Change Log for MQTT feature =
	22	+
	23	+This instruction is wrote start from LG02_LG08-5.3.1580178039. Below is related change log since this version of firmware.
	24	+
	25	+* LG02_LG08-5.3.1580178039
	26	+** Initiate version
	27	+
	28	+
	29	+= 3. MQTT forward operating principle =
	30	+
	31	+== 3.1 Network Structure ==
	32	+
	33	+Below shows the network structure for MQTT forwarding.
	34	+
	35	+* For Uplink: The sensor sends data to LoRa Gateway via LoRa wireless, The gateway will process these data and forward to remote MQTT Broker via Internet.
	36	+* For Downlink: The gateway subscribe a topic in the MQTT broker, when there is update on the topic, the gateway will know and broadcast the data to Local LoRa network,
	37	+
	38	+[[~[~[image:https://wiki.dragino.com/images/thumb/4/45/MQTT_Forward_1.png/600px-MQTT_Forward_1.png~|~|height="348" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Forward_1.png]]
	39	+
	40	+General MQTT structure
	41	+
	42	+== 3.2 How sensor data is forwarded ==
	43	+
	44	+In this MQTT forward feature, the key point is how the gateway process the sensor data.
	45	+
	46	+=== 3.2.1 Upstream ===
	47	+
	48	+Assume there are two sensor nodes, their ID are Node1 ID: 6734 , Node2 ID: 7456. In the remote MQTT broker there are two topics: Topic1: /channel/765800, Topic2: /channel/367860. We can set up in the gateway to map Node1 to Topic1 and Node2 to Topic2. So when there is a sensor data from Node1, the gateway will forward the data to Topic1, when there is sensor data from Node2, the gateway will forward to Topic2.
	49	+
	50	+The data flow works as below diagram.
	51	+
	52	+[[~[~[image:https://wiki.dragino.com/images/thumb/2/2a/MQTT_Forward_2.png/600px-MQTT_Forward_2.png~|~|height="355" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Forward_2.png]]
	53	+
	54	+Upstream path
	55	+
	56	+Note: The sensor data can base or LoRa or other method, as long as there are data on the file /var/iot/channels. /span>
	57	+
	58	+=== 3.2.2 Downstream ===
	59	+
	60	+The gateway subscribes to a topic of the remote MQTT broker topic. When there is some one publish a value on this topic. The gateway will get it and broadcast to local LoRa Network.
	61	+
	62	+Below are the data flow for downstream.
	63	+
	64	+[[~[~[image:https://wiki.dragino.com/images/thumb/3/3a/MQTT_Forward_3.png/600px-MQTT_Forward_3.png~|~|height="368" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Forward_3.png]]
	65	+
	66	+Downstream path
	67	+
	68	+
	69	+== 3.3 Macro Definition ==
	70	+
	71	+The MQTT publish command use Macro settings to generate flexible upstream payload for MQTT publish.
	72	+
	73	+Currently the -t (topic) and -m (message) support Macros.
	74	+
	75	+=== 3.3.1 -t topic macro ===
	76	+
	77	+* CHANNEL: Remote Channel ID
	78	+* CLIENTID: Client ID , Same as -i
	79	+* WRITE_API: Remote Channel Write API
	80	+* USERNAME: User ID (-u)
	81	+* HOSTNAME: Device Hostname
	82	+
	83	+=== 3.3.2 -m message macro ===
	84	+
	85	+* HOSTNAME: Device Hostname
	86	+* CHANNEL: Remote Channel ID
	87	+* DATA: Sensor Data without time stamp and rssi
	88	+* META: Completely sensor data with time stamp and rssi
	89	+* JSON: Convert META to json format.
	90	+
	91	+=== 3.3.3 Example for Macro ===
	92	+
	93	+[[~[~[image:https://wiki.dragino.com/images/thumb/c/c7/MQTT_Command_9.png/600px-MQTT_Command_9.png~|~|height="385" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_9.png]]
	94	+
	95	+MQTT Publish configure
	96	+
	97	+Above screen shots shows below format:
	98	+
	99	+* -t: CLIENTID/CHANNEL/data
	100	+* -m: DATA
	101	+
	102	+When there is a LoRa sensor arrive. it will be store at the /var/iot/channels as below:
	103	+
	104	+[[~[~[image:https://wiki.dragino.com/images/thumb/c/c4/MQTT_Command_20.png/600px-MQTT_Command_20.png~|~|height="325" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_20.png]]
	105	+
	106	+Sensor Data
	107	+
	108	+According to above macro. Gateway will publish field1=22.0&field2=49.0 to topic: dragino-1b7060/78901/data, where 78901 is the remote channel for this node ID.
	109	+
	110	+
	111	+== 3.4 Modify the MQTT to support more options ==
	112	+
	113	+The MQTT Client Utility used in Dragino is **mosquitto_pub** and **mosquitto_sub**. User can add more options to the mqtt commands. User can check the valid options by command mosquitto_pub ~-~-help. as below:
	114	+
	115	+{{{root@dragino-1ec39c:~# mosquitto_pub --help
	116	+mosquitto_pub is a simple mqtt client that will publish a message on a single topic and exit.
	117	+mosquitto_pub version 1.6.4 running on libmosquitto 1.6.4.
	118	+
	119	+Usage: mosquitto_pub {[-h host] [-p port] [-u username] [-P password] -t topic | -L URL}
	120	+ {-f file | -l | -n | -m message}
	121	+ [-c] [-k keepalive] [-q qos] [-r] [--repeat N] [--repeat-delay time]
	122	+ [-A bind_address]
	123	+ [-i id] [-I id_prefix]
	124	+ [-d] [--quiet]
	125	+ [-M max_inflight]
	126	+ [-u username [-P password]]
	127	+ [--will-topic [--will-payload payload] [--will-qos qos] [--will-retain]]
	128	+ [{--cafile file | --capath dir} [--cert file] [--key file]
	129	+ [--ciphers ciphers] [--insecure]
	130	+ [--tls-alpn protocol]
	131	+ [--tls-engine engine] [--keyform keyform] [--tls-engine-kpass-sha1]]
	132	+ [--psk hex-key --psk-identity identity [--ciphers ciphers]]
	133	+ [--proxy socks-url]
	134	+ [--property command identifier value]
	135	+ [-D command identifier value]
	136	+ mosquitto_pub --help
	137	+
	138	+ -A : bind the outgoing socket to this host/ip address. Use to control which interface
	139	+ the client communicates over.
	140	+ -d : enable debug messages.
	141	+ -D : Define MQTT v5 properties. See the documentation for more details.
	142	+ -f : send the contents of a file as the message.
	143	+ -h : mqtt host to connect to. Defaults to localhost.
	144	+ -i : id to use for this client. Defaults to mosquitto_pub_ appended with the process id.
	145	+ -I : define the client id as id_prefix appended with the process id. Useful for when the
	146	+ broker is using the clientid_prefixes option.
	147	+ -k : keep alive in seconds for this client. Defaults to 60.
	148	+ -L : specify user, password, hostname, port and topic as a URL in the form:
	149	+ mqtt(s)://[username[:password]@]host[:port]/topic
	150	+ -l : read messages from stdin, sending a separate message for each line.
	151	+ -m : message payload to send.
	152	+ -M : the maximum inflight messages for QoS 1/2..
	153	+ -n : send a null (zero length) message.
	154	+ -p : network port to connect to. Defaults to 1883 for plain MQTT and 8883 for MQTT over TLS.
	155	+ -P : provide a password
	156	+ -q : quality of service level to use for all messages. Defaults to 0.
	157	+ -r : message should be retained.
	158	+ -s : read message from stdin, sending the entire input as a message.
	159	+ -t : mqtt topic to publish to.
	160	+ -u : provide a username
	161	+ -V : specify the version of the MQTT protocol to use when connecting.
	162	+ Can be mqttv5, mqttv311 or mqttv31. Defaults to mqttv311.
	163	+ --help : display this message.
	164	+ --repeat : if publish mode is -f, -m, or -s, then repeat the publish N times.
	165	+ --repeat-delay : if using --repeat, wait time seconds between publishes. Defaults to 0.
	166	+ --quiet : don't print error messages.
	167	+ --will-payload : payload for the client Will, which is sent by the broker in case of
	168	+ unexpected disconnection. If not given and will-topic is set, a zero
	169	+ length message will be sent.
	170	+ --will-qos : QoS level for the client Will.
	171	+ --will-retain : if given, make the client Will retained.
	172	+ --will-topic : the topic on which to publish the client Will.
	173	+ --cafile : path to a file containing trusted CA certificates to enable encrypted
	174	+ communication.
	175	+ --capath : path to a directory containing trusted CA certificates to enable encrypted
	176	+ communication.
	177	+ --cert : client certificate for authentication, if required by server.
	178	+ --key : client private key for authentication, if required by server.
	179	+ --keyform : keyfile type, can be either "pem" or "engine".
	180	+ --ciphers : openssl compatible list of TLS ciphers to support.
	181	+ --tls-version : TLS protocol version, can be one of tlsv1.3 tlsv1.2 or tlsv1.1.
	182	+ Defaults to tlsv1.2 if available.
	183	+ --insecure : do not check that the server certificate hostname matches the remote
	184	+ hostname. Using this option means that you cannot be sure that the
	185	+ remote host is the server you wish to connect to and so is insecure.
	186	+ Do not use this option in a production environment.
	187	+ --tls-engine : If set, enables the use of a TLS engine device.
	188	+ --tls-engine-kpass-sha1 : SHA1 of the key password to be used with the selected SSL engine.
	189	+ --psk : pre-shared-key in hexadecimal (no leading 0x) to enable TLS-PSK mode.
	190	+ --psk-identity : client identity string for TLS-PSK mode.
	191	+ --proxy : SOCKS5 proxy URL of the form:
	192	+ socks5h://[username[:password]@]hostname[:port]
	193	+ Only "none" and "username" authentication is supported.
	194	+
	195	+See https://mosquitto.org/ for more information.}}}
	196	+
	197	+
	198	+and modify the /usr/bin/mqtt_process.sh script, the location to change the command option is below lines:
	199	+
	200	+{{{# Call MQTT Publish command
	201	+
	202	+# 1. Case with User, Password and Client ID present (e.g. Azure)
	203	+if [ ! -z "$pass" ] && [ ! -z "$user" ] && [ ! -z "$clientID" ]; then
	204	+ case="1"
	205	+ mosquitto_pub $D -h $server -p $port -q $pub_qos -i $clientID -t $pub_topic -u $user -P "$pass" $C $cafile $PUB_FLAG "$mqtt_data"
	206	+
	207	+# 2. Case with Certificate, Key and ClientID present (e.g. AWS)
	208	+elif [ ! -z "$certfile" ] && [ ! -z "$key" ] && [ ! -z "$clientID" ]; then
	209	+ case="2"
	210	+ mosquitto_pub $D -h $server -p $port -q $pub_qos -i $clientID -t $pub_topic --cert $cert --key $key $C $cafile $PUB_FLAG "$mqtt_data"
	211	+
	212	+# 3. Case with no User, Certificate or ClientID present
	213	+elif [ -z "$user" ] && [ -z "$certfile" ] && [ -z "$clientID" ]; then
	214	+ case="3"
	215	+ mosquitto_pub $D -h $server -p $port -q $pub_qos -t $pub_topic $PUB_FLAG "$mqtt_data"
	216	+
	217	+# 4. Case with no User, Certificate, but with ClientID present
	218	+elif [ -z "$user" ] && [ -z "$certfile" ] && [ ! -z "$clientID" ]; then
	219	+ case="4"
	220	+ mosquitto_pub $D -h $server -p $port -q $pub_qos -i $clientID -t $pub_topic $PUB_FLAG "$mqtt_data"
	221	+
	222	+# 5. Case with User and ClientID present, but no Password and no Certificate present
	223	+elif [ -z "$pass" ] && [ -z "$certfile" ] && [ ! -z "$user" ] && [ ! -z "$clientID" ]; then
	224	+ case="5"
	225	+ mosquitto_pub $D -h $server -p $port -q $pub_qos -i $clientID -t $pub_topic -u $user $PUB_FLAG "$mqtt_data"
	226	+
	227	+# 6. Case with User and Password present, but no ClientID and no Certificate present
	228	+elif [ ! -z "$user" ] && [ ! -z "$pass" ] && [ -z "$clientID" ] && [ -z "$certfile" ]; then
	229	+ case="6"
	230	+ mosquitto_pub $D -h $server -p $port -q $pub_qos -t $pub_topic -u $user -P "$pass" $PUB_FLAG "$mqtt_data"
	231	+
	232	+# 0. Else - invalid parameters, just log
	233	+else
	234	+ case="Invalid parameters"
	235	+ logger "[IoT.MQTT]:Invalid Parameters - mosquitto_pub not called."
	236	+fi}}}
	237	+
	238	+
	239	+= 4. Example to communicate to a simple MQTT server =
	240	+
	241	+== 4.1 Overview ==
	242	+
	243	+This section is an example to show how to set up LG01-N to communicate with a MQTT server. The MQTT server is a simple utility set up in a local PC. Note: User can set up same server via [[this instruction>>url:http://www.steves-internet-guide.com/install-mosquitto-broker/]].
	244	+
	245	+== 4.2 Simulate via MQTT.fx utility ==
	246	+
	247	+The [[MQTT.fx>>url:http://mqttfx.jensd.de/index.php/download]] is a MQTT client tool. We can use this to simulate a MQTT connection to our MQTT broker first to make sure the MQTT broker works. This will also help us understand how it works.
	248	+
	249	+In this test, the MQTT broker and MQTT.fx are installed in the same PC, so the MQTT server address in MQTT.fx should be localhost. Below shows how to connect to the server.
	250	+
	251	+[[~[~[image:https://wiki.dragino.com/images/thumb/0/06/MQTT_Forward_4.png/600px-MQTT_Forward_4.png~|~|height="201" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Forward_4.png]]
	252	+
	253	+Connect to MQTT Broker
	254	+
	255	+After connected, use publish to public some thing to MQTT server. This to simulate upsteam
	256	+
	257	+[[~[~[image:https://wiki.dragino.com/images/thumb/b/bd/MQTT_Forward_5.png/600px-MQTT_Forward_5.png~|~|height="149" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Forward_5.png]]
	258	+
	259	+Upstream: Publish message to MQTT Broker
	260	+
	261	+To simulate a downstream, use MQTT.fx to subscribe a topic, and publish something to this topic. as Below:
	262	+
	263	+[[~[~[image:https://wiki.dragino.com/images/thumb/3/3d/MQTT_Forward_6.png/600px-MQTT_Forward_6.png~|~|height="279" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Forward_6.png]]
	264	+
	265	+Downstream: Subscribe a topic to get downstream
	266	+
	267	+
	268	+== 4.3 Simulate via Dragino Command Line ==
	269	+
	270	+For first try of MQTT connection, simulate via command line is recommend, there are many servers / connection type for MQTT. They are using different connection parameters. Simulating the connection via command line will help us rapidly connect to server and debug.
	271	+
	272	+In the Dragino Gateway, we use [[mosquitto client>>url:https://mosquitto.org/]] for MQTT connection.
	273	+
	274	+
	275	+For Upstream
	276	+
	277	+command is [[mosquitto_pub>>url:https://mosquitto.org/man/mosquitto_pub-1.html]]
	278	+
	279	+Example: mosquitto_pub -h 192.168.199.148 -p 1883 -t /channel/6543 -m temp=36
	280	+
	281	+Note: 192.168.199.148 is MQTT broker address, the gateway and the MQTT broker PC are in the same network.
	282	+
	283	+[[~[~[image:https://wiki.dragino.com/images/thumb/d/d0/MQTT_Command_6.png/600px-MQTT_Command_6.png~|~|height="188" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_6.png]]
	284	+
	285	+mosquitto_pub
	286	+
	287	+
	288	+For Downstream
	289	+
	290	+Use [[mosquitto_sub>>url:https://mosquitto.org/man/mosquitto_sub-1.html]] to subscribe the change on the topic.
	291	+
	292	+[[~[~[image:https://wiki.dragino.com/images/thumb/8/89/MQTT_Command_7.png/600px-MQTT_Command_7.png~|~|height="267" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_7.png]]
	293	+
	294	+mosquitto_sub
	295	+
	296	+== 4.4 Configure Dragino UI for MQTT connection ==
	297	+
	298	+This chapter are step by step to show to configure the Dragino Menu for MQTT auto connection.
	299	+
	300	+Go to Dragino Menu ~-~-> MQTT Client
	301	+
	302	+[[~[~[image:https://wiki.dragino.com/images/thumb/b/bc/MQTT_Command_8.png/600px-MQTT_Command_8.png~|~|height="249" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_8.png]]
	303	+
	304	+go to mqtt configure menu
	305	+
	306	+Select Forward to MQTT server. Notice: This option is removed from the latest firmware, in the latest firmware, if user submit "SAVE & APPLY" in MQTT page, the gateway will use MQTT service.
	307	+
	308	+[[~[~[image:https://wiki.dragino.com/images/thumb/1/14/MQTT_Commands_8.png/600px-MQTT_Commands_8.png~|~|height="240" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Commands_8.png]]
	309	+
	310	+forward to MQTT
	311	+
	312	+=== 4.4.1 Configure the MQTT Client for Upstream ===
	313	+
	314	+Below screenshot is same as the publish command:
	315	+
	316	+{{{mosquitto_pub -h 192.168.199.148 -p 1883 -i dragino-1b7060 -t CLIENTID/CHANNEL/data -m DATA
	317	+//where the CLIENTID, CHANNEL & DATA are macro. represent for
	318	+//CLIENTID: dragino-1b7060
	319	+//CHANNEL: Remote ID in Channel settings; here is 78901 or 567456
	320	+//DATA: The data stores in /var/iot/channels/
	321	+}}}
	322	+
	323	+[[~[~[image:https://wiki.dragino.com/images/thumb/c/c7/MQTT_Command_9.png/600px-MQTT_Command_9.png~|~|height="385" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_9.png]]
	324	+
	325	+MQTT Publish configure
	326	+
	327	+[[~[~[image:https://wiki.dragino.com/images/thumb/b/b7/MQTT_Command_10.png/600px-MQTT_Command_10.png~|~|height="544" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_10.png]]
	328	+
	329	+MQTT Channel settings
	330	+
	331	+For example, if we put a data(temp=46) on the file /var/iot/channels/4567, because 4567 match the remote channel 78901. the gateway will run this command:
	332	+
	333	+{{{mosquitto_pub -h 192.168.199.148 -p 1883 -i dragino-1b7060 -t dragino-1b7060/78901/data -m temp=46
	334	+}}}
	335	+
	336	+to MQTT broker.
	337	+
	338	+
	339	+Below is a simulation to put this data to active the MQTT publish.
	340	+
	341	+[[~[~[image:https://wiki.dragino.com/images/thumb/3/30/MQTT_Command_11.png/600px-MQTT_Command_11.png~|~|height="308" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_11.png]]
	342	+
	343	+MQTT Publish
	344	+
	345	+
	346	+=== 4.4.2 Configure the MQTT Client for Downstream ===
	347	+
	348	+Below screen shot equal to this subscribe command:
	349	+
	350	+{{{ mosquitto_sub -h 192.168.199.148 -p 1883 -i dragino-1b7060 -t command.
	351	+}}}
	352	+
	353	+[[~[~[image:https://wiki.dragino.com/images/3/36/MQTT_Command_12.png~|~|height="173" width="579"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_12.png]]
	354	+
	355	+MQTT Subscribe
	356	+
	357	+
	358	+When MQTT broker receive a update on this topic, the gateway will get the update and use LoRa radio to broadcast this message. The LoRa parameters used for update is:
	359	+
	360	+[[~[~[image:https://wiki.dragino.com/images/thumb/b/b8/MQTT_Command_13.png/600px-MQTT_Command_13.png~|~|height="300" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_13.png]]
	361	+
	362	+LoRa Broadcast parameters.
	363	+
	364	+
	365	+And below is the subscribe simulation:
	366	+
	367	+[[~[~[image:https://wiki.dragino.com/images/thumb/6/60/MQTT_Command_14.png/600px-MQTT_Command_14.png~|~|height="255" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_14.png]]
	368	+
	369	+downstream simulation
	370	+
	371	+
	372	+\\
	373	+
	374	+== 4.5 Add LoRa support to communicate with remote sensor ==
	375	+
	376	+In above section, we have configured the UI to support MQTT upstream and downstream. We can simulate via Linux command. In this section, we will guide how to communicate with remote LoRa End Node for upstream and downstream.
	377	+
	378	+=== 4.5.1 Use LoRa Raw protocol for communication ~-~- For LG01/LG02 ===
	379	+
	380	+We can use [[LoRa Shield>>url:http://www.dragino.com/products/lora/item/102-lora-shield.html]] to send LoRa Raw data to Gateway and receive data from gateway.
	381	+
	382	+The example Sketch for LoRa Shield +Arduino is here: [[LoRa_Shield_Sketch_For_MQTT>>url:http://www.dragino.com/downloads/index.php?dir=LoraShield/]]
	383	+
	384	+And this link is the required library: [[arduino-LoRa-master>>url:http://www.dragino.com/downloads/index.php?dir=LoraShield/]]. Unzip this library and put in Arduino library location.
	385	+
	386	+What does the Arduino Sketch do? The Arduino Sketch will:
	387	+
	388	+* Upstream: Keep sending a LoRa Message every minutes with this payload : <4567>tem=xx&hum=yy (Where xx and yy are temperature and humidity value generated randomly).
	389	+* Downstream: Listening broadcast message from gateway, and print it in console.
	390	+* The LoRa parameter settings in Arduino should match the LoRa settings in gateway, as below:
	391	+
	392	+[[~[~[image:https://wiki.dragino.com/images/thumb/3/3b/MQTT_Command_17.png/600px-MQTT_Command_17.png~|~|height="197" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_17.png]]
	393	+
	394	+LoRa Parameter should match
	395	+
	396	+
	397	+Below is the test result after the Arduino Sketch is running.
	398	+
	399	+[[~[~[image:https://wiki.dragino.com/images/thumb/6/63/MQTT_Command_18.png/600px-MQTT_Command_18.png~|~|height="319" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_18.png]]
	400	+
	401	+Upstream Data Flow
	402	+
	403	+[[~[~[image:https://wiki.dragino.com/images/thumb/1/18/MQTT_Command_19.png/600px-MQTT_Command_19.png~|~|height="309" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Command_19.png]]
	404	+
	405	+Downstream Data Flow
	406	+
	407	+
	408	+=== 4.5.2 Use LoRaWAN Protocol for communication ~-~- For LG308/LPS8/DLOS8 ===
	409	+
	410	+Since firmware LG02_LG08~-~-build-v5.3.1585192026-20200326-1109, Dragino LoRaWAN gateways support the communication to LoRaWAN ABP end node locally without the need of LoRaWAN server. This feature allow us to integrate MQTT in the gateway to support LoRaWAN to MQTT forwarding or visa verse.
	411	+
	412	+When use test this feature, please use the version higher then : LG02_LG08~-~-build-v5.4.1593400722-20200629-1120, in this version, the upload format is changed and readable, which is easier for integration.
	413	+
	414	+
	415	+\\Video Instruction:[[https:~~/~~/youtu.be/qJTY441-t90>>url:https://youtu.be/qJTY441-t90]]
	416	+
	417	+
	418	+Step 1: Refer [[Communicate with ABP End Node>>url:https://wiki.dragino.com/index.php/Communication_with_ABP_End_Node]] to know how to set up LG308 to work with LoRaWAN End node.
	419	+
	420	+Step 2: Make sure your Radio settings match the End Node settings.
	421	+
	422	+[[~[~[image:https://wiki.dragino.com/images/thumb/f/f7/LG308_MQTT_5.png/600px-LG308_MQTT_5.png~|~|height="387" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LG308_MQTT_5.png]]
	423	+
	424	+Use Same Frequency Band as End Node
	425	+
	426	+
	427	+Step 3: Set up publish format and MQTT channel. The LG308 will store the Data from End node in HEX format in the file. And we need to config the format to META
	428	+
	429	+[[~[~[image:https://wiki.dragino.com/images/thumb/8/8d/LG308_MQTT_3.png/600px-LG308_MQTT_3.png~|~|height="385" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LG308_MQTT_3.png]]
	430	+
	431	+Publish mush use META as data format for LG308
	432	+
	433	+
	434	+Step 4: Map the Device Address to Remote ID in MQTT server.
	435	+
	436	+[[~[~[image:https://wiki.dragino.com/images/thumb/7/7f/LG308_MQTT_4.png/600px-LG308_MQTT_4.png~|~|height="335" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LG308_MQTT_4.png]]
	437	+
	438	+Map Dev Addr to remote ID
	439	+
	440	+
	441	+Step 5: Upstream: Save the change, we can see the log info via "sytem log", End Node and MQTT Server
	442	+
	443	+[[~[~[image:https://wiki.dragino.com/images/thumb/b/be/LG308_MQTT_6.png/600px-LG308_MQTT_6.png~|~|height="279" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LG308_MQTT_6.png]]
	444	+
	445	+Upstream Process
	446	+
	447	+[[~[~[image:https://wiki.dragino.com/images/thumb/0/07/LG308_MQTT_6_1.png/600px-LG308_MQTT_6_1.png~|~|height="246" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LG308_MQTT_6_1.png]]
	448	+
	449	+Choose ASCII Format
	450	+
	451	+[[~[~[image:https://wiki.dragino.com/images/thumb/a/a3/LG308_MQTT_6_2.png/600px-LG308_MQTT_6_2.png~|~|height="248" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LG308_MQTT_6_2.png]]
	452	+
	453	+LHT65 Decoder
	454	+
	455	+Step 6: Set up subscribe: Subscribe a topci for downstream.
	456	+
	457	+[[~[~[image:https://wiki.dragino.com/images/thumb/b/b9/LG308_MQTT_7.png/600px-LG308_MQTT_7.png~|~|height="176" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LG308_MQTT_7.png]]
	458	+
	459	+Subscribe to a topic
	460	+
	461	+
	462	+Step 7: Downstream: Save the change, we can see the log info via "sytem log", End Node and MQTT Server.
	463	+
	464	+[[~[~[image:https://wiki.dragino.com/images/thumb/9/97/LG308_MQTT_8.png/600px-LG308_MQTT_8.png~|~|height="298" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LG308_MQTT_8.png]]
	465	+
	466	+Downstream Flow
	467	+
	468	+Notice: The text use for Downstream must meet the requirement from [[LG308 Downstream Payload>>url:https://wiki.dragino.com/index.php/Communication_with_ABP_End_Node#Downstream]]
	469	+
	470	+
	471	+= 5. Example For Different MQTT Servers =
	472	+
	473	+|=(((
	474	+[[~[~[image:https://wiki.dragino.com/images/thumb/7/73/ThingSpeak1.png/200px-ThingSpeak1.png~|~|alt="ThingSpeak1.png" height="98" width="200"~]~]>>url:https://wiki.dragino.com/index.php/File:ThingSpeak1.png]]
	475	+
	476	+=== [[ThingSpeak Server>>url:http://www.thingspeak.com/]] ===
	477	+
	478	+
	479	+[[Examples>>url:https://wiki.dragino.com/index.php/ThingSpeak_Examples]]
	480	+)))|=(((
	481	+[[~[~[image:https://wiki.dragino.com/images/thumb/3/3b/Lewei50.png/200px-Lewei50.png~|~|alt="Lewei50.png" height="58" width="200"~]~]>>url:https://wiki.dragino.com/index.php/File:Lewei50.png]]
	482	+
	483	+=== [[乐联网平台>>url:https://www.lewei50.com/]] ===
	484	+
	485	+
	486	+[[lewei Example>>url:https://wiki.dragino.com/index.php/Lewei_Example_mqtt]]
	487	+)))|=(((
	488	+[[~[~[image:https://wiki.dragino.com/images/thumb/a/aa/AWS-IOT.png/200px-AWS-IOT.png~|~|alt="AWS-IOT.png" height="122" width="200"~]~]>>url:https://wiki.dragino.com/index.php/File:AWS-IOT.png]]
	489	+
	490	+=== [[AWS-IOT>>url:https://aws.amazon.com/cn/iot-platform/how-it-works/]] ===
	491	+
	492	+
	493	+[[AWS Examples>>url:https://wiki.dragino.com/index.php/MQTT_Forward_to_Amazon_AWS-IOT]]
	494	+)))
	495	+
	496	+
	497	+= 6. How to Debug =
	498	+
	499	+User can login the gateway's console and run **logread -f**. It will shows the output when there is packet arrive.User can see if it is correct.
	500	+
	501	+= 7. How to ask for Support =
	502	+
	503	+If a user still not have trouble making it works. please send a mail to support@dragino.com with the below info:
	504	+
	505	+* Detail of your LoRaWAN end node.
	506	+* Gateway Model and firmware version
	507	+* A set of screenshots you configure in the gateway according to our instruction
	508	+* A full log of "logread -f"