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

Version 60.2 by Xiaoling on 2022/07/22 17:43

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