Wiki source code of SW3L -- LoRaWAN Outdoor Flow Sensor

Last modified by Mengting Qiu on 2025/02/17 16:42

version	line-number	content
75.2	1
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50.3	3	(% style="text-align:center" %)
65.1	4	[[image:image-20220519085532-1.png\|\|_mstalt="431171" height="429" width="366"]]
8.5	5
	6
	7
	8
63.2	9
71.21	10	Table of Contents:
8.5	11
50.3	12	{{toc/}}
8.5	13
	14
	15
55.2	16
	17
	18
8.7	19	= 1. Introduction =
8.5	20
46.5	21	== 1.1 What is SW3L LoRaWAN Flow Sensor ==
8.5	22
67.8	23
46.4	24	(((
50.11	25	The Dragino SW3L is a (% style="color:#037691" %)LoRaWAN Flow Sensor(%%). It detects water flow volume and uplink to IoT server via LoRaWAN network. User can use this to (% style="color:#037691" %)monitor the water usage for buildings.(%%)
46.4	26	)))
8.5	27
46.4	28	(((
50.8	29	SW3L is powered by (% style="color:#037691" %)8500mAh Li-SOCI2 battery(%%), It is designed for long term use up to 10 years. (Actually Battery life depends on the use environment, update period.)
46.4	30	)))
8.5	31
46.4	32	(((
50.11	33	The SW3L will send water flow volume every 20 minutes. It can also (% style="color:#037691" %)detect the water flow status(%%) and (% style="color:#037691" %)send Alarm(%%), to avoid the waste for water usage such as broken toilet case.
46.4	34	)))
8.5	35
46.4	36	(((
8.5	37	SW3L is designed for both indoor and outdoor use. It has a weatherproof enclosure and industrial level battery to work in low to high temperatures.
46.4	38	)))
8.5	39
46.4	40	(((
8.5	41	Each SW3L is pre-load with a set of unique keys for LoRaWAN registration, register these keys to LoRaWAN server and it will auto connect after power on
46.4	42	)))
8.5	43
46.4	44	(((
48.2	45	*Battery life depends on how often to send data, please see battery analyzer.
46.4	46	)))
8.5	47
50.8	48
8.7	49	== 1.2 Features ==
8.5	50
64.2	51
8.5	52	* LoRaWAN v1.0.3 Class A protocol.
	53	* Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864
	54	* Upload water flow volume
	55	* Monitor water waste
	56	* 8500mAh industrial battery(none-rechargeable)
	57	* AT Commands to change parameters
	58	* Uplink on periodically and open/close event
	59	* Datalog feature
	60	* Remote configure parameters via LoRa Downlink
	61	* Firmware upgradable via program port
	62	* Wall Mountable
	63	* Outdoor Use
	64
	65	== 1.3 Installation ==
	66
64.2	67
8.5	68	Each SW3L package is shipped with a flow sensor. Install the flow sensor into water pipe with correct flow direction to start monitoring.
	69
50.9	70
8.5	71	== 1.4 Storage & Operation Temperature ==
	72
64.2	73
8.5	74	-40°C to +85°C
	75
50.9	76
32.4	77	== 1.5 Applications ==
8.5	78
64.2	79
8.5	80	* Flow Sensor application
	81	* Water Control
	82	* Toilet Flow Sensor
	83	* Monitor Waste water
	84
	85	== 1.6 Flow Sensor Spec ==
	86
76.3	87
46.6	88	(((
76.2	89	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:515px" %)
	90	\|=(% style="width: 103px; background-color:#4F81BD; color: white;" %)Model\|=(% style="width: 103px; background-color:#4F81BD; color: white;" %)SW3L-004\|=(% style="width: 103px; background-color:#4F81BD; color: white;" %)SW3L-006\|=(% style="width: 103px; background-color:#4F81BD; color: white;" %)SW3L-010\|=(% style="width: 103px; background-color:#4F81BD; color: white;" %)SW3L-020
76.1	91	\|(% style="width:152px" %)Probe #\|(% style="width:176px" %)DW-004\|(% style="width:173px" %)DW-006\|(% style="width:165px" %)DW-010\|(% style="width:190px" %)DW-020
	92	\|(% style="width:152px" %)Diameter\|(% style="width:176px" %)G1/2" / DN15\|(% style="width:173px" %)G3/4" / DN20\|(% style="width:165px" %)G1" / DN25\|(% style="width:190px" %)G2" / DN50
	93	\|(% style="width:152px" %)Working Range\|(% style="width:176px" %)1~~30L/min\|(% style="width:173px" %)1~~60L/min\|(% style="width:165px" %)2~~100L/min\|(% style="width:190px" %)10~~300L/min
	94	\|(% style="width:152px" %)Measure\|(% style="width:176px" %)450 pulse = 1 L\|(% style="width:173px" %)390 pulse = 1 L\|(% style="width:165px" %)64 pulse = 1 L\|(% style="width:190px" %)12 pulse = 1 L
	95	\|(% style="width:152px" %)Accurancy\|(% style="width:176px" %)±5%\|(% style="width:173px" %)±5%\|(% style="width:165px" %)±5%\|(% style="width:190px" %)±5%
	96	\|(% style="width:152px" %)Power Consumption\|(% style="width:176px" %)1uA, 3.6v (Sensor Only)\|(% style="width:173px" %)1uA, 3.6v (Sensor Only)\|(% style="width:165px" %)1uA, 3.6v (Sensor Only)\|(% style="width:190px" %)1uA, 3.6v (Sensor Only)
	97	\|(% style="width:152px" %)Max Pressure\|(% style="width:176px" %)≤ 1.75Mpa\|(% style="width:173px" %)≤ 1.75Mpa \|(% style="width:165px" %)≤ 1.75Mpa\|(% style="width:190px" %)≤ 1.75Mpa
	98	\|(% style="width:152px" %)Temperature range\|(% style="width:176px" %)<80°C\|(% style="width:173px" %)<80°C\|(% style="width:165px" %)<80°C\|(% style="width:190px" %)<80°C
	99	\|(% style="width:152px" %)Humidity Range\|(% style="width:176px" %)35%~~90%RH (no frost)\|(% style="width:173px" %)35%~~90%RH (no frost)\|(% style="width:165px" %)35%~~90%RH (no frost)\|(% style="width:190px" %)35%~~90%RH (no frost)
67.4	100	)))
	101
76.3	102
8.7	103	== 1.7 Mechanical ==
8.5	104
64.2	105
65.1	106	[[image:1652922789057-479.png\|\|_mstalt="299312"]]
8.6	107
65.1	108	[[image:1652922797548-885.png\|\|_mstalt="300391"]]
8.6	109
54.19	110
77.4	111	(% style="color:blue" %)004: DW-004 Flow Sensor: diameter: G1/2” / DN15. 450 pulse = 1 L
8.6	112
65.1	113	[[image:image-20220519091350-1.png\|\|_mstalt="429611" height="385" width="722"]]
8.6	114
54.19	115
76.3	116	(% style="color:blue" %)006: DW-006 Flow Sensor: diameter: G3/4” / DN20. 390 pulse = 1 L
54.19	117
65.1	118	[[image:image-20220519091423-2.png\|\|_mstalt="5391646" height="258" width="723"]]
8.6	119
54.19	120
76.3	121	(% style="color:blue" %)010: DW-010 Flow Sensor: diameter: G 1” / DN25. 64 pulse = 1 L
54.19	122
65.1	123	[[image:image-20220519091423-3.png\|\|_mstalt="5391971" height="448" width="724"]]
8.6	124
50.9	125
76.3	126	(% style="color:blue" %)020: DW-020 Flow Sensor: diameter: G 2” / DN50. 12 pulse = 1 L
74.1	127
77.2	128	[[image:image-20240125090604-1.png]]
74.1	129
	130
9.2	131	== 1.8 Pin Definitions and Switch ==
	132
64.2	133
65.1	134	[[image:1652923899427-927.png\|\|_mstalt="299377" height="372" width="723"]]
9.2	135
50.9	136
9.4	137	=== 1.8.1 Pin Definition ===
	138
64.2	139
63.16	140	SW3L is pre-configured to connect to two external wires. The other pins are not used. If user wants to know more about other pins, please refer to the user manual of LSN50v2 at:
9.3	141
66.2	142	[[https:~~/~~/www.dropbox.com/sh/djkxs7mr17y94mi/AABVlWbM9uzK9OA3mXyAT10Za?dl=0>>https://www.dropbox.com/sh/djkxs7mr17y94mi/AABVlWbM9uzK9OA3mXyAT10Za?dl=0]]
50.9	143
77.6	144	(% style="color:red" %)Add PA11 digital input and PA12 digital input(Since firmware v1.2.0)
55.7	145
64.2	146
9.4	147	=== 1.8.2 Jumper JP2(Power ON/OFF) ===
9.3	148
64.2	149
9.3	150	Power on Device when putting this jumper.
	151
50.9	152
9.4	153	=== 1.8.3 BOOT MODE / SW1 ===
9.3	154
64.2	155
9.4	156	(((
63.17	157	1) ISP: upgrade mode, device won't have any signal in this mode. but ready for upgrade firmware. LED won't work. Firmware won't run.
9.3	158	2) Flash: work mode, the device starts to work and send out console output for further debug
9.4	159	)))
9.3	160
50.10	161
9.4	162	=== 1.8.4 Reset Button ===
	163
64.2	164
9.3	165	Press to reboot the device.
	166
50.10	167
9.4	168	=== 1.8.5 LED ===
	169
64.2	170
9.3	171	It will flash:
77.6	172	1) Boot the device in flash mode
	173	2) Send an uplink packe
9.5	174
50.10	175
17.3	176	= 2. Operation Mode =
9.5	177
	178	== 2.1 How it works? ==
	179
64.2	180
9.6	181	Each SW3L is shipped with a worldwide unique set of OTAA keys. To use SW3L in a LoRaWAN network, user needs to input the OTAA keys in the LoRaWAN network server. So SW3L can join the LoRaWAN network and start to transmit sensor data.
9.5	182
50.49	183
9.5	184	== 2.2 Example to use for LoRaWAN network ==
	185
64.2	186
9.5	187	This section shows an example of how to join the TTN V3 LoRaWAN IoT server. Usages with other LoRaWAN IoT servers are similar.
	188
65.1	189	[[image:1652944563101-603.png\|\|_mstalt="292279" height="321" width="729"]]
9.5	190
66.2	191
48.3	192	* In this use case, the SW3L is connected into water line to measure water flow and send the status to the LoRaWAN server. The SW3L will uplink different types of messages to the LoRaWAN server. See [[Uplink payload>>\|\|anchor="H2.3UplinkPayload"]] for detail.
9.5	193
10.2	194	(((
	195	Assume the DLOS8 is already set to connect to the [[TTN V3 network >>url:https://eu1.cloud.thethings.network]]. We need to add the SW3L device in TTN V3:
64.2	196
	197
10.2	198	)))
9.5	199
10.2	200	(((
63.14	201	(% style="color:blue" %)Step 1(%%): Create a device in TTN V3 with the OTAA keys from SW3L.
10.2	202	)))
9.5	203
10.2	204	(((
	205	Each SW3L is shipped with a sticker with the default device EUI as below:
	206	)))
9.5	207
71.3	208	[[image:image-20230426085254-1.png\|\|height="236" width="508"]]
9.5	209
69.2	210
9.5	211	Users can enter these keys in the LoRaWAN Server portal. Below is the TTN V3 screenshot:
	212
	213	Add APP EUI in the application.
	214
65.1	215	[[image:image-20220519151704-1.png\|\|_mstalt="429715"]]
9.5	216
67.2	217
65.1	218	[[image:image-20220519151704-2.png\|\|_mstalt="430079" height="322" width="717"]]
43.2	219
	220
65.1	221	[[image:image-20220519151704-3.png\|\|_mstalt="430443"]]
43.2	222
	223
65.1	224	[[image:image-20220519151704-4.png\|\|_mstalt="430807"]]
43.2	225
9.5	226	Add APP KEY and DEV EUI
	227
55.8	228
	229
63.14	230	(% style="color:blue" %)Step 2(%%): Power on SW3L
9.5	231
65.1	232	[[image:image-20220519094347-1.png\|\|_mstalt="432549" height="430" width="725"]]
9.5	233
66.2	234
10.2	235	(((
	236	Put the jumper to power on SW3L and it will auto-join to the TTN V3 network. After join success, it will start to upload sensor data to TTN V3 and the user can see it in the panel.
	237	)))
9.5	238
65.1	239	[[image:1652924675638-547.png\|\|_mstalt="298363" height="254" width="732"]]
9.5	240
50.48	241
9.5	242	== 2.3 Uplink Payload ==
	243
64.2	244
44.2	245	(((
9.5	246	Uplink payloads have two types:
44.2	247	)))
9.5	248
44.2	249	* (((
	250	Open/Close Status: Use FPORT=2
	251	)))
	252	* (((
	253	Other control commands: Use other FPORT fields.
	254	)))
9.5	255
44.2	256	(((
9.5	257	The application server should parse the correct value based on FPORT settings.
50.47	258
	259
44.2	260	)))
9.5	261
	262	=== 2.3.1 Device Status, FPORT~=5 ===
	263
64.2	264
11.2	265	(((
44.2	266	(((
11.2	267	Include device configure status. Once SW3L Joined the network, it will uplink this message to the server. After that, SW3L will uplink Device Status every 12 hours.
	268	)))
44.2	269	)))
9.5	270
11.2	271	(((
44.2	272	(((
11.2	273	Users can also use the downlink command(0x26 01) to ask SW3L to resend this uplink. This uplink payload also includes the DeviceTimeReq to get time.
51.2	274
75.3	275	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
75.4	276	\|(% colspan="6" style="background-color:#4f81bd; color:white" %)Device Status (FPORT=5)
71.7	277	\|(% style="width:103px" %)Size (bytes)\|(% style="width:72px" %)1\|2\|(% style="width:91px" %)1\|(% style="width:86px" %)1\|(% style="width:44px" %)2
75.2	278	\|(% style="width:103px" %)Value\|(% style="width:72px" %)Sensor Model\|Firmware Version\|(% style="width:91px" %)Frequency Band\|(% style="width:86px" %)Sub-band\|(% style="width:44px" %)BAT
11.2	279	)))
44.2	280	)))
9.5	281
	282
	283	Example parse in TTNv3
	284
65.1	285	[[image:1652925144491-755.png\|\|_mstalt="296296" height="139" width="732"]]
9.5	286
63.14	287	* (% style="color:#037691" %)Sensor Model(%%): For SW3L, this value is 0x11
9.5	288
63.14	289	* (% style="color:#037691" %)Firmware Version(%%): 0x0100, Means: v1.0.0 version
9.5	290
63.14	291	* (% style="color:#037691" %)Frequency Band(%%):
9.5	292
	293	*0x01: EU868
13.2	294
9.5	295	*0x02: US915
13.2	296
9.5	297	*0x03: IN865
13.2	298
9.5	299	*0x04: AU915
13.2	300
9.5	301	*0x05: KZ865
13.2	302
9.5	303	*0x06: RU864
13.2	304
9.5	305	*0x07: AS923
13.2	306
9.5	307	*0x08: AS923-1
13.2	308
9.5	309	*0x09: AS923-2
13.2	310
9.5	311	*0x0a: AS923-3
13.2	312
9.5	313	*0x0b: CN470
13.2	314
9.5	315	*0x0c: EU433
13.2	316
9.5	317	*0x0d: KR920
13.2	318
9.5	319	*0x0e: MA869
	320
	321	* (((
63.14	322	(% style="color:#037691" %)Sub-Band:
9.5	323
	324	* AU915 and US915:value 0x00 ~~ 0x08
	325	* CN470: value 0x0B ~~ 0x0C
	326	* Other Bands: Always 0x00
51.3	327
	328
9.5	329	)))
	330
63.14	331	* (% style="color:#037691" %)Battery Info:
9.5	332
	333	Check the battery voltage.
	334
	335	Ex1: 0x0B45 = 2885mV
	336
	337	Ex2: 0x0B49 = 2889mV
	338
50.46	339
9.5	340	=== 2.3.2 Sensor Configuration, FPORT~=4 ===
	341
64.2	342
13.2	343	SW3L will only send this command after getting the downlink command (0x26 02) from the server.
9.5	344
75.3	345	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
75.4	346	\|(% style="background-color:#4f81bd; color:white; width:70px" %) Size(bytes)\|(% style="background-color:#4f81bd; color:white; width:105px" %)3\|(% style="background-color:#4f81bd; color:white; width:60px" %)1\|(% style="background-color:#4f81bd; color:white; width:96px" %)1\|(% style="background-color:#4f81bd; color:white; width:105px" %)2\|(% style="background-color:#4f81bd; color:white; width:74px" %)1
71.22	347	\|Value\|(% style="width:104px" %)TDC(unit:sec)\|(% style="width:43px" %)N/A\|(% style="width:91px" %)Stop Timer\|(% style="width:100px" %)Alarm Timer\|(% style="width:69px" %)Reserve
71.7	348
63.14	349	* (% style="color:#037691" %)TDC: (default: 0x0004B0)
9.5	350
13.2	351	Uplink interval for the total pulse count, default value is 0x0004B0 which is 1200 seconds = 20 minutes.
9.5	352
52.2	353
63.14	354	* (% style="color:#037691" %)STOP Duration & Alarm Timer
9.5	355
48.4	356	Shows the configure value of [[Alarm for continuously water flow>>\|\|anchor="H3.4Alarmforcontinuouslywaterflow"]]
9.5	357
65.1	358	[[image:image-20220519095747-2.png\|\|_mstalt="434460" height="113" width="723"]]
9.5	359
50.45	360
17.4	361	=== 2.3.3 Water Flow Value, Uplink FPORT~=2 ===
9.5	362
64.2	363
17.2	364	(((
	365	SW3L will send this uplink after Device Status once join the LoRaWAN network successfully. And SW3L will:
	366	)))
9.5	367
17.2	368	(((
48.4	369	periodically send this uplink every 20 minutes, this interval [[can be changed>>\|\|anchor="H3.1SetTransmitIntervalTime"]].
17.2	370	)))
9.5	371
17.2	372	(((
9.5	373	Uplink Payload totals 11 bytes.
17.2	374	)))
9.5	375
75.3	376	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
	377	\|=(% colspan="6" style="width: 510px;background-color:#4F81BD;color:white" %)Water Flow Value, FPORT=2
67.9	378	\|(% style="width:60px" %)Size(bytes)\|(% style="width:130px" %)1\|(% style="width:130px" %)4\|(% style="width:30px" %)1\|(% style="width:50px" %)1\|(% style="width:80px" %)4
75.4	379	\|(% style="width:110px" %)Value\|(% style="width:81px" %)Calculate Flag & [[Alarm>>\|\|anchor="H3.4Alarmforcontinuouslywaterflow"]]\|(% style="width:95px" %)(((
17.2	380	Total pulse Or Last Pulse
52.3	381	)))\|(% style="width:55px" %)MOD\|(% style="width:115px" %)Reserve(0x01)\|(% style="width:129px" %)[[Unix TimeStamp>>\|\|anchor="H2.4.1UnixTimeStamp"]]
9.5	382
75.3	383	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:470px" %)
	384	\|=(% colspan="4" style="width: 470px;background-color:#4F81BD;color:white" %)Status & Alarm field
67.10	385	\|(% style="width:60px" %)Size(bit)\|(% style="width:80px" %)6\|(% style="width:310px" %)1\|(% style="width:20px" %)1
75.4	386	\|(% style="width:88px" %)Value\|(% style="width:117px" %)Calculate Flag\|(% style="width:221px" %)Alarm: 0: No Alarm; 1: Alarm\|(% style="width:64px" %)N/A
9.5	387
65.1	388	[[image:image-20220519095946-3.png\|\|_mstalt="435110" height="284" width="736"]]
17.2	389
52.4	390
17.5	391	* (((
63.14	392	(% style="color:#037691" %)Calculate Flag
17.5	393	)))
9.5	394
17.5	395	(((
67.1	396	The calculate flag is a user defined field, IoT server can use this flag to handle different meters with different pulse factors. For example, if there are 100 Flow Sensors, meters 1 ~~50 are 1 liter/pulse and meters 51 ~~ 100 has 1.5 liter/pulse.
17.5	397	)))
9.5	398
17.5	399	(((
17.3	400	Example: in the default payload:
17.5	401	)))
9.5	402
74.1	403	(((
	404	* calculate flag=0: for SW3L-004 Flow Sensor: 450 pulse = 1 L
	405	* calculate flag=1: for SW3L-006 Flow Sensor: 390 pulse = 1 L
	406	* calculate flag=2: for SW3L-010 Flow Sensor: 64 pulse = 1 L
79.1	407
	408	(% style="color:red" %)Note: At present, the calculation flag can only be set to 0~~2, and probe types other than this can directly calculate water flow using different decoding.
17.5	409	)))
17.2	410
17.5	411	(((
9.5	412	Default value: 0.
17.5	413	)))
9.5	414
17.5	415	(((
9.5	416	Range (6 bits): (b)000000 ~~ (b) 111111
67.1	417
	418	If user use with a meter for example is 0.02L/pulse. To proper decode the correct value in server,
	419
	420	1) User can set the Calculate Flag of this sensor to 3.
	421
	422	2) In server side, when a sensor data arrive, the decoder will check the value of Calculate Flag, It the value is 3, the total volume = 0.02 x Pulse Count.
17.5	423	)))
9.5	424
17.5	425	(((
48.4	426	(% style="color:red" %)NOTE: User need to set Calculate Flag to proper value before use Flow Sensor. Downlink or AT Command see: (%%)Refer: [[Set Calculate Flag>>\|\|anchor="H3.6Setthecalculateflag"]]
52.4	427
	428
17.5	429	)))
9.5	430
17.5	431	* (((
63.14	432	(% style="color:#037691" %)Alarm
17.5	433	)))
9.5	434
17.5	435	(((
71.19	436	See [[Alarm for continuously water flow>>\|\|anchor="H3.4Alarmforcontinuouslywaterflow"]]
17.5	437	)))
9.5	438
65.1	439	[[image:image-20220519095946-4.png\|\|_mstalt="435474" height="65" width="724"]]
17.2	440
52.4	441
17.5	442	* (((
63.14	443	(% style="color:#037691" %)Total pulse
17.5	444	)))
9.5	445
17.5	446	(((
17.2	447	Total pulse/counting since factory
17.5	448	)))
9.5	449
17.5	450	(((
17.2	451	Range (4 Bytes) : 0x00000000~~ 0xFFFFFFFF .
52.4	452
	453
17.5	454	)))
9.5	455
17.5	456	* (((
63.14	457	(% style="color:#037691" %)Last Pulse
17.5	458	)))
9.5	459
17.5	460	(((
17.2	461	Total pulse since last FPORT=2 uplink. (Default 20 minutes)
17.5	462	)))
9.5	463
17.5	464	(((
17.2	465	Range (4 Bytes) : 0x00000000~~ 0xFFFFFFFF .
52.4	466
	467
17.5	468	)))
9.5	469
17.5	470	* (((
63.14	471	(% style="color:#037691" %)MOD: Default =0
17.5	472	)))
17.2	473
17.5	474	(((
17.3	475	MOD=0 ~-~-> Uplink Total Pulse since factory
17.5	476	)))
17.2	477
17.5	478	(((
17.3	479	MOD=1 ~-~-> Uplink total pulse since last FPORT=2 uplink.
52.4	480
	481
17.5	482	)))
17.2	483
17.5	484	* (((
63.14	485	(% style="color:#037691" %)Water Flow Value
66.2	486
	487
	488
17.5	489	)))
17.2	490
17.5	491	(((
66.2	492	Total Water Flow Volume = (Calculate Flag) x (Total Pulse)=9597/450=21.3L
	493
	494
17.5	495	)))
17.2	496
65.1	497	[[image:image-20220519095946-5.png\|\|_mstalt="435838" height="50" width="727"]]
17.2	498
52.4	499
66.2	500
17.5	501	(((
66.2	502	Total Water Flow for TDC timer = (Calculate Flag) x (Last Pulse)=79/450=0.2L
	503
	504
17.5	505	)))
17.2	506
65.1	507	[[image:image-20220519095946-6.png\|\|_mstalt="436202" height="43" width="733"]]
17.2	508
50.44	509
19.2	510	=== 2.3.4 Historical Water Flow Status, FPORT~=3 ===
9.5	511
64.2	512
19.2	513	(((
63.17	514	SW3L stores sensor values and users can retrieve these history values via the [[downlink command>>\|\|anchor="H2.4DatalogFeature"]].
19.2	515	)))
9.5	516
19.2	517	(((
	518	The historical payload includes one or multiplies entries and every entry has the same payload as Real-Time water flow status.
	519	)))
9.5	520
19.2	521	* (((
48.4	522	Each data entry is 11 bytes and has the same structure as [[real time water flow status>>\|\|anchor="H2.3.3A0WaterFlowValue2CUplinkFPORT3D2"]], to save airtime and battery, SW3L will send max bytes according to the current DR and Frequency bands.
19.2	523	)))
9.5	524
19.2	525	(((
9.5	526	For example, in the US915 band, the max payload for different DR is:
19.2	527	)))
9.5	528
19.2	529	(((
67.2	530	a) DR0: max is 11 bytes so one entry of data
19.2	531	)))
9.5	532
19.2	533	(((
67.2	534	b) DR1: max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
19.2	535	)))
9.5	536
19.2	537	(((
67.2	538	c) DR2: total payload includes 11 entries of data
19.2	539	)))
9.5	540
19.2	541	(((
67.2	542	d) DR3: total payload includes 22 entries of data.
19.2	543	)))
9.5	544
19.2	545	(((
67.2	546	If SW3L doesn't have any data in the polling time. It will uplink 11 bytes of 0
52.6	547
	548
19.2	549	)))
9.5	550
19.2	551	(((
52.7	552	(% style="color:#037691" %)Downlink:
19.2	553	)))
9.5	554
19.2	555	(((
	556	0x31 62 46 B1 F0 62 46 B3 94 07
	557	)))
9.5	558
65.1	559	[[image:1652926690850-712.png\|\|_mstalt="295178" height="115" width="726"]]
9.5	560
52.6	561
19.2	562	(((
52.7	563	(% style="color:#037691" %)Uplink:
19.2	564	)))
9.5	565
19.2	566	(((
	567	00 00 01 00 00 00 00 62 46 B2 26 00 00 01 00 00 00 00 62 46 B2 5D 00 00 01 00 00 00 00 62 46 B2 99 00 00 01 00 00 00 00 62 46 B2 D5 00 00 01 00 00 01 15 62 46 B3 11 00 00 01 00 00 01 1F 62 46 B3 7E
52.6	568
	569
19.2	570	)))
9.5	571
19.2	572	(((
52.7	573	(% style="color:#037691" %)Parsed Value:
19.2	574	)))
9.5	575
19.2	576	(((
	577	[Alarm, Calculate Flag, MOD, Total pulse or Last Pulse, Water Flow Value, TIME]
	578	)))
9.5	579
19.2	580	(((
	581
	582	)))
9.5	583
19.2	584	(((
	585	[FALSE,0,0,0,0.0,2022-04-01 08:04:54],
	586	)))
9.5	587
19.2	588	(((
	589	[FALSE,0,0,0,0.0,2022-04-01 08:05:49],
	590	)))
9.5	591
19.2	592	(((
	593	[FALSE,0,0,0,0.0,2022-04-01 08:06:49],
	594	)))
9.5	595
19.2	596	(((
	597	[FALSE,0,0,0,0.0,2022-04-01 08:07:49],
	598	)))
9.5	599
19.2	600	(((
	601	[FALSE,0,0,277,0.6,2022-04-01 08:08:49],
	602	)))
9.5	603
19.2	604	(((
	605	[FALSE,0,0,287,0.6,2022-04-01 08:10:38],
66.2	606
	607
19.2	608	)))
9.5	609
65.1	610	[[image:1652926777796-267.png\|\|_mstalt="300183" height="279" width="724"]]
9.5	611
	612
	613	== 2.4 Datalog Feature ==
	614
64.2	615
9.5	616	When a user wants to retrieve sensor value, he can send a poll command from the IoT platform to ask the sensor to send value in the required time slot.
	617
50.43	618
9.5	619	=== 2.4.1 Unix TimeStamp ===
	620
64.2	621
21.2	622	SW3L uses Unix TimeStamp format based on
9.5	623
65.1	624	[[image:1652926852443-847.png\|\|_mstalt="297427" height="112" width="724"]]
9.5	625
	626	Users can get this time from the link: [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
	627
	628	Below is the converter example
	629
65.1	630	[[image:1652926913271-611.png\|\|_mstalt="293605" height="421" width="720"]]
9.5	631
55.13	632
9.5	633	=== 2.4.2 Set Device Time ===
	634
50.14	635
21.2	636	(% style="color:#4f81bd" %)Through LoRaWAN MAC Command
9.5	637
21.2	638	(((
48.4	639	Once SW3L Joined the LoRaWAN network, it will send the MAC command (DeviceTimeReq) and the server will reply with (DeviceTimeAns) to send the current time to SW3L. If SW3L fails to get the time from the server, SW3L will use the internal time and wait for the next time request ~[[[via Device Status (FPORT=5)>>\|\|anchor="H2.3.1DeviceStatus2CFPORT3D5"]]].
66.2	640
	641
21.2	642	)))
9.5	643
21.2	644	(((
66.2	645	(% style="color:red" %)Note: LoRaWAN Server needs to support LoRaWAN v1.0.3(MAC v1.0.3) or higher to support this MAC command feature.
50.42	646
	647
21.2	648	)))
9.5	649
	650	=== 2.4.3 Poll sensor value ===
	651
64.2	652
9.5	653	Users can poll sensor values based on timestamps. Below is the downlink command.
	654
75.3	655	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:459px" %)
	656	\|=(% colspan="4" style="width: 456px;background-color:#4F81BD;color:white" %)Downlink Command to poll Open/Close status (0x31)
21.3	657	\|(% style="width:62px" %)1byte\|(% style="width:137px" %)4bytes\|(% style="width:136px" %)4bytes\|(% style="width:120px" %)1byte
	658	\|(% style="width:62px" %)31\|(% style="width:137px" %)Timestamp start\|(% style="width:136px" %)Timestamp end\|(% style="width:120px" %)Uplink Interval
9.5	659
45.3	660	(((
9.5	661	Timestamp start and Timestamp end-use Unix TimeStamp format as mentioned above. Devices will reply with all data logs during this period, using the uplink interval.
45.3	662	)))
9.5	663
45.3	664	(((
65.1	665	For example, downlink command[[image:image-20220519152849-5.png\|\|_mstalt="434772"]]
45.3	666	)))
9.5	667
45.3	668	(((
66.2	669	Is to check 2021/11/12 12:00:00 to 2021/11/12 15:00:00's data
45.3	670	)))
9.5	671
45.3	672	(((
9.5	673	Uplink Internal =5s，means CPL01 will send one packet every 5s. range 5~~255s.
50.41	674
	675
45.3	676	)))
9.5	677
	678	=== 2.4.4 Decoder in TTN V3 ===
	679
64.2	680
65.1	681	[[image:1652927365661-475.png\|\|_mstalt="297089" height="359" width="723"]]
9.5	682
67.6	683	Please check the decoder from this link: [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
9.5	684
	685
55.10	686	== 2.5 Show data on Datacake ==
9.5	687
64.2	688
32.3	689	(((
9.5	690	Datacake IoT platform provides a human-friendly interface to show the sensor data, once we have sensor data in TTN V3, we can use Datacake to connect to TTN V3 and see the data in Datacake. Below are the steps:
32.3	691	)))
9.5	692
32.3	693	(((
66.2	694	(% style="color:blue" %)Step 1(%%): Link TTNv3 to Datacake [[https:~~/~~/docs.datacake.de/lorawan/lns/thethingsindustries#create-integration-on-tti>>url:https://docs.datacake.de/lorawan/lns/thethingsindustries#create-integration-on-tti]]
32.3	695	)))
9.5	696
32.3	697	(((
66.2	698	(% style="color:blue" %)Step 2(%%): Configure SW3L in Datacake
67.6	699
	700
32.3	701	)))
9.5	702
65.1	703	[[image:image-20220519103234-7.png\|\|_mstalt="430482" height="562" width="492"]]
9.5	704
67.6	705
65.1	706	[[image:image-20220519103234-8.png\|\|_mstalt="430846" height="550" width="549"]]
9.5	707
67.6	708
65.1	709	[[image:image-20220519103234-9.png\|\|_mstalt="431210" height="493" width="666"]]
9.5	710
67.6	711
65.1	712	[[image:image-20220519103234-10.png\|\|_mstalt="451217" height="234" width="724"]]
9.5	713
67.6	714
65.1	715	[[image:image-20220519103234-11.png\|\|_mstalt="451594" height="386" width="727"]]
9.5	716
67.6	717
65.1	718	[[image:image-20220519103234-12.png\|\|_mstalt="451971" height="262" width="728"]]
9.5	719
67.6	720
65.1	721	[[image:image-20220519103234-13.png\|\|_mstalt="452348" height="216" width="727"]]
9.5	722
67.6	723
65.1	724	[[image:image-20220519103234-14.png\|\|_mstalt="452725" height="464" width="722"]]
9.5	725
67.6	726
65.1	727	[[image:image-20220519103234-15.png\|\|_mstalt="453102" height="488" width="725"]]
9.5	728
67.6	729
65.1	730	[[image:image-20220519103234-16.png\|\|_mstalt="453479" height="407" width="722"]]
32.4	731
50.39	732
32.4	733	= 3. Configure SW3L via AT Command or LoRaWAN Downlink =
	734
64.2	735
32.4	736	Use can configure SW3L via AT Command or LoRaWAN Downlink.
	737
50.15	738	* AT Command Connection: See [[FAQ>>\|\|anchor="H5.FAQ"]].
50.17	739	* LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
32.4	740
	741	There are two kinds of commands to configure SW3L, they are:
	742
50.18	743
32.4	744	* (% style="color:#4f81bd" %)General Commands.
	745
	746	These commands are to configure:
	747
	748	* General system settings like uplink interval.
	749	* LoRaWAN protocol & radio related command.
	750
55.12	751	They are the same for all Dragino Devices which support DLWS-005 LoRaWAN Stack(Note~~). These commands can be found on the wiki: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
32.4	752
	753
	754	* (% style="color:#4f81bd" %)Commands special design for SW3L
	755
	756	These commands are only valid for SW3L, as below:
	757
50.18	758
32.4	759	== 3.1 Set Transmit Interval Time ==
	760
64.2	761
32.4	762	Feature: Change LoRaWAN End Node Transmit Interval.
	763
64.2	764
54.8	765	(% style="color:#4f81bd" %)AT Command: AT+TDC
32.4	766
75.3	767	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
	768	\|=(% style="width: 160px;background-color:#4F81BD;color:white" %)Command Example\|=(% style="width: 140px;background-color:#4F81BD;color:white" %)Function\|=(% style="width: 210px;background-color:#4F81BD;color:white" %)Response
71.13	769	\|(% style="width:156px" %)AT+TDC=?\|(% style="width:137px" %)Show current transmit Interval\|(((
	770	30000
	771	OK
	772	the interval is 30000ms = 30s
	773	)))
	774	\|(% style="width:156px" %)AT+TDC=60000\|(% style="width:137px" %)Set Transmit Interval\|(((
	775	OK
	776	Set transmit interval to 60000ms = 60 seconds
	777	)))
32.4	778
	779	(% style="color:#4f81bd" %)Downlink Command: 0x01
	780
	781	Format: Command Code (0x01) followed by 3 bytes time value.
	782
66.3	783	If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
32.4	784
67.2	785	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
	786	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
32.4	787
	788	== 3.2 Set Password ==
	789
64.2	790
32.4	791	Feature: Set device password, max 9 digits
	792
64.2	793
54.8	794	(% style="color:#4f81bd" %)AT Command: AT+PWORD
32.4	795
75.3	796	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:405px" %)
	797	\|=(% style="width: 170px;background-color:#4F81BD;color:white" %)Command Example\|=(% style="width: 124px;background-color:#4F81BD;color:white" %)Function\|=(% style="width: 110px;background-color:#4F81BD;color:white" %)Response
71.13	798	\|(% style="width:170px" %)(((
	799	AT+PWORD=?
	800	)))\|(% style="width:123px" %)(((
	801	Show password
	802	)))\|(% style="width:109px" %)(((
32.4	803	(((
	804	123456
	805	)))
	806
	807	(((
	808	OK
	809	)))
	810	)))
71.13	811	\|(% style="width:170px" %)(((
	812	AT+PWORD=999999
	813	)))\|(% style="width:123px" %)(((
	814	Set password
	815	)))\|(% style="width:109px" %)(((
32.4	816	OK
	817	)))
	818
	819	(% style="color:#4f81bd" %)Downlink Command:
	820
	821	No downlink command for this feature.
	822
50.38	823
32.4	824	== 3.3 Quit AT Command ==
	825
64.2	826
32.4	827	(((
	828	Feature: Quit AT Command mode, so user needs to input the password again before using AT Commands.
54.8	829	(% style="color:#4f81bd" %)AT Command: AT+DISAT
32.4	830	)))
	831
75.3	832	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:452px" %)
	833	\|=(% style="width: 155px;background-color:#4F81BD;color:white" %)Command Example\|=(% style="width: 198px;background-color:#4F81BD;color:white" %)Function\|=(% style="width: 99px;background-color:#4F81BD;color:white" %)Response
71.13	834	\|(% style="width:155px" %)AT+DISAT\|(% style="width:198px" %)Quit AT Commands mode\|(% style="width:96px" %)OK
32.4	835
	836	(% style="color:#4f81bd" %)Downlink Command:
	837
	838	No downlink command for this feature.
	839
50.37	840
32.5	841	== 3.4 Alarm for continuously water flow ==
32.4	842
64.2	843
32.5	844	(((
	845	This feature is to monitor and send Alarm for continuously water flow.
	846	)))
32.4	847
32.5	848	(((
67.2	849	Example case is for Toilet water monitoring, if some one push toilet button, the toilet will have water flow. If the toilet button has broken and can't returned to original state, the water flow will keep for hours or days which cause huge waste for water.
32.5	850	)))
32.4	851
32.5	852	(((
	853	To monitor this faulty and send alarm, there are two settings:
	854	)))
32.4	855
32.5	856	* (((
63.14	857	(% style="color:#4f81bd" %)Stop Duration: Unit: Second
32.5	858	)))
32.4	859
32.5	860	(((
67.2	861	Default: 15s, If SW3L didn't see any water flow in 15s, SW3L will consider stop of water flow event.
32.5	862	)))
32.4	863
32.5	864	* (((
63.14	865	(% style="color:#4f81bd" %)Alarm Timer: Units: Minute; Default 0 minutes (means Alarm disable)
32.5	866	)))
32.4	867
32.5	868	(((
53.3	869
	870
67.2	871	Example: 3 minutes, if SW3L detect a start of water flow event and didn't detect a stop event within Alarm timer, SW3L will send an Alarm to indicate a water flow abnormal alarm.
32.5	872	)))
32.4	873
32.5	874	(((
	875	So for example, If we set stop duration=15s and Alarm Timer=3minutes. If the toilet water flow continuously for more than 3 minutes, Sensor will send an alarm (in Confirmed MODE) to platform.
	876	)))
32.4	877
32.5	878	(((
64.2	879	(% style="color:red" %)Note: After this alarm is send, sensor will consider a stop of water flow and count for another new event. So if water flow waste last for 1 hour, Sensor will keep sending alarm every 3 minutes.
53.3	880
	881
32.5	882	)))
32.4	883
32.5	884	(((
	885	(% style="color:#4f81bd" %)AT Command(%%) to configure:
	886	)))
32.4	887
32.5	888	* (((
	889	AT+PTRIG=15,3 ~-~-> Set Stop duration: 15s, Alarm Timer: 3 minutes.
	890	)))
	891	* (((
	892	AT+ PTRIG=15,0 ~-~-> Default Value, disable water waste Alarm.
	893	)))
32.4	894
32.5	895	(((
53.3	896
	897
32.5	898	(% style="color:#4f81bd" %)Downlink Command(%%) to configure:
	899	)))
32.4	900
32.5	901	(((
67.2	902	Command: 0xAA aa bb cc
32.5	903	)))
32.4	904
32.5	905	(((
	906	AA: Command Type Code
	907	)))
32.4	908
32.5	909	(((
	910	aa: Stop duration
	911	)))
32.4	912
32.5	913	(((
	914	bb cc: Alarm Timer
	915	)))
32.4	916
32.5	917	(((
	918	If user send 0xAA 0F 00 03: equal to AT+PTRIG=15,3
	919	)))
32.4	920
54.6	921
32.6	922	== 3.5 Clear Flash Record ==
32.4	923
64.3	924
32.4	925	Feature: Clear flash storage for data log feature.
	926
64.3	927
54.8	928	(% style="color:#4f81bd" %)AT Command: AT+CLRDTA
32.4	929
75.3	930	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
	931	\|=(% style="width: 156px; background-color:#4F81BD;color:white" %)Command Example\|=(% style="width: 177px; background-color:#4F81BD;color:white" %)Function\|=(% style="width: 177px; background-color:#4F81BD;color:white" %)Response
71.13	932	\|(% style="width:154px" %)AT+CLRDTA\|(% style="width:177px" %)Clear flash storage for data log feature.\|(% style="width:177px" %)Clear all stored sensor data... OK
32.4	933
32.6	934	(% style="color:#4f81bd" %)Downlink Command:
32.4	935
67.2	936	* Example: 0xA301 ~/~/ Same as AT+CLRDTA
32.4	937
32.7	938	== 3.6 Set the calculate flag ==
32.4	939
64.3	940
32.4	941	Feature: Set the calculate flag
	942
64.3	943
54.8	944	(% style="color:#4f81bd" %)AT Command: AT+CALCFLAG
32.4	945
75.3	946	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:462px" %)
	947	\|=(% style="width: 161px;background-color:#4F81BD;color:white" %)Command Example\|=(% style="width: 204px;background-color:#4F81BD;color:white" %)Function\|=(% style="width: 97px;background-color:#4F81BD;color:white" %)Response
70.1	948	\|(% style="width:161px" %)AT+CALCFLAG=1\|(% style="width:202px" %)Set the calculate flag to 1.\|(% style="width:95px" %)OK
	949	\|(% style="width:161px" %)AT+CALCFLAG=2\|(% style="width:202px" %)Set the calculate flag to 2.\|(% style="width:95px" %)OK
32.4	950
32.7	951	(% style="color:#4f81bd" %)Downlink Command:
32.4	952
71.1	953	* Example: 0XA501 ~/~/ Same as AT+CALCFLAG=1
32.4	954
78.1	955	== (% data-sider-select-id="e738628a-6dac-4911-8e57-1c07617a3bde" %)3.7 Set count number(%%) ==
32.4	956
64.3	957
32.4	958	Feature: Manually set the count number
	959
64.3	960
54.8	961	(% style="color:#4f81bd" %)AT Command: AT+SETCNT
32.4	962
75.3	963	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:481px" %)
	964	\|=(% style="width: 162px;background-color:#4F81BD;color:white" %)Command Example\|=(% style="width: 224px;background-color:#4F81BD;color:white" %)Function\|=(% style="width: 95px;background-color:#4F81BD;color:white" %)Response
71.1	965	\|(% style="width:162px" %)AT+SETCNT=0\|(% style="width:222px" %)Set the count number to 0.\|(% style="width:93px" %)OK
	966	\|(% style="width:162px" %)AT+SETCNT=100\|(% style="width:222px" %)Set the count number to 100.\|(% style="width:93px" %)OK
32.4	967
32.8	968	(% style="color:#4f81bd" %)Downlink Command:
32.4	969
71.1	970	* Example: 0xA600000001 ~/~/ Same as AT+SETCNT=1
	971	* Example: 0xA600000064 ~/~/ Same as AT+SETCNT=100
32.10	972
	973	== 3.8 Set work mode ==
	974
64.3	975
32.10	976	Feature: Manually set the work mode
	977
64.3	978
54.8	979	(% style="color:#4f81bd" %)AT Command: AT+MOD
32.10	980
75.3	981	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:463px" %)
	982	\|=(% style="width: 162px;background-color:#4F81BD;color:white" %)Command Example\|=(% style="width: 193px;background-color:#4F81BD;color:white" %)Function\|=(% style="width: 108px;background-color:#4F81BD;color:white" %)Response
32.10	983	\|(% style="width:162px" %)AT+MOD=0\|(% style="width:191px" %)Set the work mode to 0.\|(% style="width:106px" %)OK
70.1	984	\|(% style="width:162px" %)AT+MOD=1\|(% style="width:191px" %)Set the work mode to 1\|(% style="width:106px" %)OK
32.10	985
	986	(% style="color:#4f81bd" %)Downlink Command:
	987
71.1	988	* Example: 0x0A00 ~/~/ Same as AT+MOD=0
	989	* Example: 0x0A01 ~/~/ Same as AT+MOD=1
32.10	990
68.3	991	= 4. Battery & Power Consumption =
32.11	992
	993
68.3	994	SW3L uses ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
64.3	995
68.3	996	[[Battery Info & Power Consumption Analyze>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
32.11	997
	998
32.12	999	= 5. FAQ =
	1000
	1001	== 5.1 How to use AT Command to configure SW3 ==
	1002
64.3	1003
32.12	1004	SW3L UART connection photo
	1005
65.1	1006	[[image:1652943554687-149.png\|\|_mstalt="298155" height="354" width="724"]]
32.12	1007
50.25	1008
35.3	1009	(((
32.12	1010	In the PC, you need to set the serial baud rate to (% style="color:green" %)9600(%%) to access the serial console for LSN50. LSN50 will output system info once power on as below:
35.3	1011	)))
32.12	1012
65.1	1013	[[image:1652943563580-704.png\|\|_mstalt="295191" height="504" width="720"]]
32.12	1014
50.26	1015
32.12	1016	== 5.2 How to upgrade the firmware? ==
	1017
64.3	1018
35.4	1019	(((
32.12	1020	A new firmware might be available for:
35.4	1021	)))
32.12	1022
35.4	1023	* (((
	1024	Support new features
	1025	)))
	1026	* (((
	1027	For bug fix
	1028	)))
	1029	* (((
	1030	Change LoRaWAN bands.
	1031	)))
32.12	1032
35.4	1033	(((
65.1	1034	Instruction for how to upgrade: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome\|\|anchor="H2.HardwareUpgradeMethodSupportList" _mstmutation="1"]]
35.4	1035	)))
32.12	1036
35.4	1037	(((
66.3	1038	Firmware location: [[https:~~/~~/www.dropbox.com/sh/jktldt8q674i87l/AADqk1zoUEekCjDR_4ic2Tg0a?dl=0>>https://www.dropbox.com/sh/jktldt8q674i87l/AADqk1zoUEekCjDR_4ic2Tg0a?dl=0]]
35.4	1039	)))
32.12	1040
	1041
	1042	== 5.3 How to change the LoRa Frequency Bands/Region? ==
	1043
64.3	1044
61.1	1045	Users can follow the introduction for how to upgrade images. When downloading the images, choose the required image file for download.
50.29	1046
61.1	1047
62.1	1048	== 5.4 Can I connect 3rd party flow sensor other than the default one? ==
61.1	1049
64.3	1050
67.11	1051	If a user wants to connect SW3L to a 3rd party flow sensor such as a [[DN50 flow sensor>>https://valvesdirect.net/product/flow-sensor-2-inch-15-400lpm/]], that is possible. A flow sensor with pulse output is needed.
61.1	1052
67.11	1053	(% style="background-color:yellow" %)Below is the notice for the connection:
61.1	1054
67.11	1055	~1. Connect the 3rd party flow meter to the pulse input and GND of SW3L.
	1056
	1057	2. Make sure the pulse output voltage of 3rd party flow sensor is less than 5v.
	1058
	1059	3. It is not recommended to use SW3L to power the external flow meter, unless you are sure the external flow sensor is low power ( several uA). Otherwise the battery of SW3L will be running out soon.
	1060
	1061	4. After connection, user needs to set the [[Calculator Flag and change the payload>>\|\|anchor="H2.3.3A0WaterFlowValue2CUplinkFPORT3D2"]] so to get the correct reading in the platform.
	1062
82.1	1063	Connection:
67.11	1064
82.1	1065	[[image:image-20240918182813-2.jpeg\|\|height="487" width="697"]]
64.4	1066
61.1	1067
87.1	1068	== 5.5 What can I do if error in Flash Write operation is displayed on the serial port? ==
82.1	1069
87.1	1070
	1071	When the STM32 module is running, sometimes there is no uplink data (FPORT=2). When we use the serial port to view the printing information, we will find that the serial port is printed as "error in Flash Write operation".
	1072
	1073	Example:
	1074
	1075	[[image:image-20250217163534-3.png\|\|height="418" width="1068"]]
	1076
	1077	[[image:image-20250217163128-1.png\|\|height="604" width="822"]]
	1078
	1079	The device will reset continuously, and we can use the AT+CLRDTA command to clear all stored sensor data. Then restart the device and the device will return to normal.
	1080
	1081	[[image:image-20250217163301-2.png]]
	1082
	1083	[[image:image-20250217164119-4.png\|\|height="442" width="1135"]]
	1084
	1085
34.3	1086	= 6. Order Info =
	1087
64.3	1088
67.12	1089	Part Number: (% style="color:#4f81bd" %)SW3L-XXX-YYY
34.3	1090
67.12	1091	(% style="color:#4f81bd" %)XXX(%%): The default frequency band
34.3	1092
74.3	1093	* (% style="color:red" %)AS923(%%): LoRaWAN AS923 band
	1094	* (% style="color:red" %)AU915(%%): LoRaWAN AU915 band
	1095	* (% style="color:red" %)EU433(%%): LoRaWAN EU433 band
	1096	* (% style="color:red" %)EU868(%%): LoRaWAN EU868 band
	1097	* (% style="color:red" %)KR920(%%): LoRaWAN KR920 band
	1098	* (% style="color:red" %)US915(%%): LoRaWAN US915 band
	1099	* (% style="color:red" %)IN865(%%): LoRaWAN IN865 band
74.2	1100	* (% style="color:red" %)CN470(%%): LoRaWAN CN470 band
64.3	1101
34.4	1102	(((
34.3	1103	(% style="color:#4f81bd" %)YYY(%%): Flow Sensor Model:
34.4	1104	)))
34.3	1105
74.2	1106	* 004: DW-004 Flow Sensor: diameter: G1/2” / DN15. 450 pulse = 1 L
	1107	* 006: DW-006 Flow Sensor: diameter: G3/4” / DN20. 390 pulse = 1 L
	1108	* 010: DW-010 Flow Sensor: diameter: G 1” / DN25. 64 pulse = 1 L
	1109	* 020: DW-020 Flow Sensor: diameter: G 2” / DN50. 12 pulse = 1 L
34.3	1110
34.4	1111	= 7. Packing Info =
	1112
64.3	1113
34.4	1114	Package Includes:
	1115
	1116	* SW3L Water Flow Sensor x 1
	1117
	1118	= 8. Support =
	1119
64.3	1120
34.4	1121	* (((
	1122	Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
	1123	)))
	1124	* (((
	1125	Provide as much information as possible regarding your inquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]].
66.3	1126
	1127
	1128
	1129
34.4	1130	)))

Wiki source code of SW3L -- LoRaWAN Outdoor Flow Sensor

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