Wiki source code of Application Note : Communicate with Different Sensors ----- RS485-LN / RS485-BL

Version 60.4 by Xiaoling on 2022/08/11 16:50

version	line-number	content
57.14	1	Table of Contents:
6.2	2
	3	{{toc/}}
	4
41.2	5
	6
	7
	8
	9
41.7	10	= 1. Introduction =
1.1	11
57.6	12
1.2	13	This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
1.1	14
38.2	15
41.7	16	== 1.1 Example 1: Connect to Leak relay and VFD ==
1.1	17
57.6	18
1.2	19	This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to Relay and VFD and communicate with Mobile. The structure is like below:
1.1	20
10.2	21	[[image:image-20220527091852-1.png]]
1.1	22
1.2	23	Connection
1.1	24
1.18	25
1.1	26
10.2	27	[[image:image-20220527091942-2.png]](% style="display:none" %)
	28
1.2	29	Connection
1.1	30
10.2	31
57.15	32	(% style="color:blue" %)Related documents:
1.1	33
60.1	34	* System Structure: [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/\|\|_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
	35	* Explanation on how to integrate to Node-red and to the Mobile Phone, and with link to the Github code: [[Configure Manual>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/\|\|_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
1.2	36	* [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
1.1	37
57.20	38
60.2	39
41.7	40	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	41
57.7	42
1.2	43	This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to Pulse Counter and communicate with Mobile. This example and example 2 compose the structure for a farm IoT solution. The structure is like below:
1.1	44
57.7	45
10.2	46	[[image:image-20220527092058-3.png]]
1.1	47
1.2	48	Connection
1.1	49
1.18	50
41.11	51
10.2	52	[[image:image-20220527092146-4.png]]
1.2	53
	54	Connection
	55
41.12	56
57.15	57	(% style="color:blue" %)Related documents:
	58
60.1	59	* Configure Document: [[Pickdata MIO40 water pulse counter to LoRa with Dragino RS485-LN>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Pulse-Counter/\|\|_mstmutation="1"]]
1.2	60	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	61
57.15	62
60.2	63
41.7	64	== 1.3 Example3: Use RS485-LN with energy meters ==
1.2	65
57.16	66
41.7	67	=== 1.3.1 OverView ===
1.2	68
57.8	69
1.5	70	(((
60.4	71	(% style="color:red" %)Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	72	)))
1.2	73
1.5	74	(((
1.2	75	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	76	)))
1.2	77
13.2	78	[[image:image-20220527092419-5.png]]
1.2	79
	80	Connection1
	81
13.2	82
41.13	83
1.19	84	(((
57.16	85	(% style="color:blue" %)How to connect with Energy Meter：
57.8	86
	87
1.19	88	)))
1.2	89
1.19	90	(((
1.2	91	Follow the instructions of the electric energy meter to connect the phase line and the neutral line, and then connect 485A+ and 485B- to RS485A and RA485B of RS485-LN respectively.
1.19	92	)))
1.2	93
1.19	94	(((
1.2	95	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	96	)))
1.2	97
1.19	98	(((
1.2	99	Power Source VIN to RS485-LN VIN+
1.19	100	)))
1.2	101
1.19	102	(((
1.2	103	Power Source GND to RS485-LN VIN-
1.19	104	)))
1.2	105
1.19	106	(((
1.2	107	Once there is power, the RS485-LN will be on.
60.2	108
	109
1.19	110	)))
1.2	111
13.2	112	[[image:image-20220527092514-6.png]]
1.2	113
	114	Connection2
	115
	116
60.2	117
20.2	118	[[image:image-20220527092555-7.png]]
1.12	119
1.2	120	Connection3
	121
	122
57.21	123
41.7	124	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	125
57.8	126
1.7	127	If the user needs to read the parameters of the electric energy meter and use the modbus command,please refer to the appendix of the MODBUS communication protocol in the user manual of the energy meter.
1.2	128
51.2	129	[[image:image-20220601143257-10.png]]
1.2	130
20.2	131
57.8	132	(% style="color:blue" %)Example:(%%) AT+COMMAND1=01 03 00 00 00 01 84 0A
1.2	133
	134	* The first byte : slave address code (=001～247)
	135	* The second byte : read register value function code
	136	* 3rd and 4th bytes: start address of register to be read
	137	* 5th and 6th bytes: Number of registers to read
	138	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	139
1.12	140	(((
57.8	141
	142
	143
1.2	144	How to parse the reading of the return command of the parameter：
	145
57.8	146	(% style="color:blue" %)Example:(%%) RETURN1：01 03 02 08 FD 7E 05
1.8	147	)))
1.2	148
	149	* The first byte ARD: slave address code (=001～254)
	150	* The second byte: Return to read function code
	151	* 3rd byte: total number of bytes
	152	* 4th～5th bytes: register data
	153	* The 6th and 7th bytes: CRC16 checksum
	154	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	155
20.2	156	(% class="wikigeneratedid" %)
	157	(((
	158
57.8	159
	160
	161
20.2	162	)))
	163
41.2	164	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	165
57.8	166
1.2	167	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	168
20.2	169
57.21	170
57.8	171	==== 1.3.3.1 via AT COMMAND ====
1.2	172
	173
57.8	174	First, we can use (% style="color:blue" %)AT+CFGDEV(%%) to get the return value, and we can also judge whether the input parameters are correct.
	175
1.8	176	(((
1.2	177	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	178	)))
1.2	179
50.2	180	[[image:image-20220601143201-9.png]]
1.2	181
1.12	182	AT COMMAND
1.2	183
20.2	184
1.8	185	(% class="box infomessage" %)
	186	(((
60.1	187	(% _mstmutation="1" %)AT+DATACUTx (%%): This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
1.8	188	)))
1.2	189
41.15	190	a: length for the return of AT+COMMAND
1.2	191
41.15	192	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	193
41.15	194	c: define the position for valid value.
1.2	195
50.2	196	[[image:image-20220601143115-8.png]]
1.2	197
	198	AT COMMAND
	199
20.2	200
41.15	201
1.2	202	PAYLOAD is available after the valid value is intercepted.
	203
1.8	204
48.2	205	[[image:image-20220601143046-7.png]]
1.2	206
	207	AT COMMAND
	208
20.2	209
41.16	210
1.2	211	You can get configured PAYLOAD on TTN.
	212
52.2	213	[[image:image-20220601143519-1.png]]
1.8	214
1.12	215	(((
1.2	216	AT COMMAND
1.12	217	)))
1.2	218
1.12	219	(((
1.13	220
60.2	221
	222
1.13	223	)))
	224
	225	(((
57.8	226	(% style="color:blue" %)Example:
39.3	227
57.18	228	(% style="color:red" %)CMD1:(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	229	)))
1.2	230
1.12	231	(((
57.8	232	RETURN1: 01 03 02 00 02 39 85 00 00(return data)
1.12	233	)))
1.2	234
1.12	235	(((
57.8	236	AT+DATACUT1: 9,1,4+5+6+7 Take the return value 00 02 39 85 as the valid value of reading current data and used to splice payload.
39.3	237
	238
1.12	239	)))
1.2	240
1.12	241	(((
57.18	242	(% style="color:red" %)CMD2: (%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	243	)))
1.2	244
1.12	245	(((
57.8	246	RETURN2: 01 03 02 08 DC BE 1D(return data)
1.12	247	)))
1.2	248
1.12	249	(((
57.8	250	AT+DATACUT2: 7,1,4+5 Take the return value 08 DC as the valid value of reading voltage data and used to splice payload.
39.3	251
	252
1.12	253	)))
1.2	254
1.12	255	(((
57.18	256	(% style="color:red" %)CMD3:(%%) Read total active energy data with MODBUS command. address: 0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	257	)))
1.2	258
1.12	259	(((
57.9	260	RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
1.12	261	)))
1.2	262
1.12	263	(((
57.8	264	AT+DATACUT3: 9,1,4+5+6+7 Take the return value 00 00 00 44 as the valid value of reading total active energy data and used to splice payload.
1.12	265	)))
1.2	266
1.12	267	(((
57.8	268	Payload: 01 00 02 39 85 08 DC 00 00 00 44
1.12	269	)))
1.2	270
47.2	271	[[image:image-20220601142936-6.png]]
1.2	272
	273	AT COMMAND
	274
20.2	275
60.2	276
21.2	277	(% style="color:#4f81bd" %)01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.
1.2	278
41.17	279
53.2	280	[[image:image-20220601143642-2.png]]
1.8	281
1.2	282	AT COMMAND
	283
	284
57.21	285
41.2	286	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	287
57.8	288
21.2	289	[[image:image-20220527093358-15.png]]
1.2	290
1.9	291	(((
1.2	292	DOWNLINK
1.9	293	)))
1.2	294
1.9	295	(((
	296
	297	)))
	298
	299	(((
39.4	300	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	301	)))
1.2	302
1.9	303	(((
4.3	304	(% class="box infomessage" %)
	305	(((
1.2	306	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	307	)))
4.3	308	)))
1.2	309
1.9	310	(((
57.26	311	(% style="color:red" %)Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
60.2	312
	313
1.9	314	)))
1.2	315
1.9	316	(((
1.2	317	Format: AF MM NN LL XX XX XX XX YY
1.9	318	)))
1.2	319
1.9	320	(((
1.2	321	Where:
1.9	322	)))
1.2	323
1.9	324	(((
1.2	325	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	326	)))
1.2	327
1.9	328	(((
1.2	329	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	330	)))
1.2	331
1.9	332	(((
1.2	333	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	334	)))
1.2	335
1.9	336	(((
1.2	337	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	338	)))
1.2	339
1.9	340	(((
1.2	341	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	342	)))
1.2	343
1.9	344	(((
1.2	345	will execute an uplink after got this command.
1.9	346	)))
1.2	347
1.9	348	(((
41.18	349
	350
57.11	351	(% style="color:blue" %)Example:
1.9	352	)))
1.2	353
1.9	354	(((
39.4	355	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	356	)))
1.2	357
57.2	358	[[image:image-20220601144149-6.png]]
1.2	359
	360	DOWNLINK
	361
1.8	362
41.19	363
54.2	364	[[image:image-20220601143803-3.png]]
1.2	365
	366	DOWNLINK
	367
1.8	368
41.20	369
57.2	370	[[image:image-20220601144053-5.png]]
1.2	371
	372	DOWNLINK
	373
1.8	374
41.21	375
55.2	376	[[image:image-20220601143921-4.png]]
1.2	377
	378	DOWNLINK
	379
1.15	380
41.22	381
46.2	382	[[image:image-20220601142805-5.png]]
1.2	383
	384	DOWNLINK
	385
	386
57.21	387
41.2	388	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	389
60.2	390
1.13	391	(((
1.2	392	This step is not necessary, it is just to show how to use a normal RS485 to USB adapter to connect to the meter to check the input and output. This can be used to test the connection and RS485 command of the meter without RS485-LN.
1.13	393	)))
1.2	394
1.13	395	(((
1.2	396	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	397	)))
1.2	398
1.13	399	(((
1.2	400	Open the serial port debugging, set the send and receive to HEX.
1.13	401	)))
1.2	402
1.13	403	(((
1.2	404	Baud rate: 9600
1.13	405	)))
1.2	406
1.13	407	(((
1.2	408	check digit: Even
57.11	409
	410
1.13	411	)))
1.2	412
27.2	413	[[image:image-20220527093708-21.png]]
1.2	414
	415	USB
	416
1.13	417
41.23	418
29.2	419	[[image:image-20220527093747-22.png]]
1.2	420
	421	USB
	422
1.13	423
41.24	424
1.13	425	(((
1.2	426	The configuration command is consistent with the AT command, input the hexadecimal command directly into the serial port, and the serial port will output the command.
57.11	427
	428
1.13	429	)))
1.2	430
1.13	431	(((
57.11	432	(% style="color:blue" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	433	)))
1.2	434
1.13	435	(((
4.6	436	output：01 03 04 00 00 00 42 7A 02
57.11	437
	438
1.13	439	)))
1.2	440
29.2	441	[[image:image-20220527093821-23.png]]
1.2	442
	443	USB
	444
29.2	445
57.21	446
41.2	447	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	448
57.11	449
1.2	450	If users need to read the parameters of multiple energy meters, they need to modify the device address, because the default device address of each energy meter is 01.
	451
1.14	452	(((
1.15	453	(((
1.2	454	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	455	)))
1.15	456	)))
1.2	457
42.2	458	[[image:image-20220601142044-1.png]]
1.2	459
30.2	460
57.11	461	(% style="color:blue" %)Example(%%): These two meters are examples of setting parameters and device addresses.
1.2	462
31.2	463	[[image:image-20220527093950-25.png]]
1.2	464
57.4	465
32.2	466	[[image:image-20220527094028-26.png]]
1.2	467
57.12	468
1.14	469	(((
1.16	470	(((
1.2	471	First of all, since the default device address of the energy meter is 01, the configuration of two energy meters will conflict, so we first connect an energy meter and configure the device address.
1.14	472	)))
1.16	473	)))
1.2	474
1.14	475	(((
1.16	476	(((
57.27	477	We can use (% style="color:blue" %)AT+CFGDEV(%%) to set the device address.
1.14	478	)))
1.16	479	)))
1.2	480
1.14	481	(((
1.16	482	(((
1.2	483	We modify the device address 01 of the first energy meter to 02.
1.14	484	)))
1.16	485	)))
1.2	486
43.2	487	[[image:image-20220601142354-2.png]]
1.2	488
57.12	489
35.2	490	(% class="box infomessage" %)
	491	(((
	492	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	493	)))
1.2	494
	495	* 01:device adaress
	496
	497	* 10:function code
	498
	499	* 00 61：Register address
	500
	501	* 00 01：Number of Registers
	502
	503	* 02：Number of bytes
	504
	505	* 00 02：Modified device address
	506
	507	* 1：Check code
	508
	509	The device address setting of the energy meter is complete.
	510
	511	Another energy meter is a single active energy meter with a floating-point format.
	512
	513	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	514
44.2	515	[[image:image-20220601142452-3.png]]
1.2	516
	517
45.2	518	[[image:image-20220601142607-4.png]]
35.2	519
57.12	520
57.21	521	(% style="color:blue" %)PAYLOAD: 01 08 DF 43 62
1.2	522
	523	* 08 DF is the valid value of the meter with device address 02.
	524	* 43 62 is the valid value of the meter with device address 01.
	525
	526	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	527
	528
57.12	529	This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to SCHNEIDER SMART and Monitor and control your cabinet remotely with no wires and with Dragino RS485-LN LoRaWAN technology.
	530
	531	The structure is like below:
	532
36.2	533	[[image:image-20220527094330-30.png]]
1.2	534
	535	Connection
	536
	537
60.1	538	* Configure Documen: [[Circuit Breaker Remote Open Close>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Circuit_Breaker_Remote_Open_Close/\|\|_mstmutation="1"]]
57.12	539
60.3	540
	541
1.2	542	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	543
57.12	544
1.2	545	This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-BL to connect to SEM Three Energy Meter and send the data to mobile phone for remote minitor. The structure is like below:
	546
60.1	547	* Configure Document For RS485-BL: [[Connect to SEM Three>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/RS485-BL/Application_Note/&file=Dragino%20RS485BL%20and%20pickdata%20SEM%20Three%20v1.pdf\|\|_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
	548	* Configure Document for RS485-LN: [[Connect to SEM Three>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/SEM_Three_Energy_Meter/&file=SEM%20three%20and%20Dragino%20RS485-LN%20v1.pdf\|\|_mstmutation="1"]]
1.2	549
60.3	550
	551
57.14	552	== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
1.2	553
57.13	554
1.2	555	This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to CEM C31 485-T1-MID and send the data for remote minitor. The structure is like below:
	556
60.1	557	* Configure Document For RS485-LN: [[CEM C31 485-T1-MID>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/ELECTRICAL%20CABINET/&file=ELECTRICAL%20CABINET%20READINGS.pdf\|\|_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
1.2	558
60.3	559
	560
57.14	561	== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
1.2	562
57.13	563
38.1	564	[[image:image-20220527094556-31.png]]
1.2	565
	566	Network Structure
	567
57.13	568
1.2	569	* [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]

Wiki source code of Application Note : Communicate with Different Sensors ----- RS485-LN / RS485-BL

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