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

Version 57.17 by Xiaoling on 2022/07/14 09:58

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
57.15	34	* System Structure: [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/\|\|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/\|\|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
57.15	38
41.7	39	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	40
57.7	41
1.2	42	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	43
57.7	44
10.2	45	[[image:image-20220527092058-3.png]]
1.1	46
1.2	47	Connection
1.1	48
1.18	49
41.11	50
10.2	51	[[image:image-20220527092146-4.png]]
1.2	52
	53	Connection
	54
41.12	55
57.15	56	(% style="color:blue" %)Related documents:
	57
	58	* 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/]]
1.2	59	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	60
57.15	61
	62
41.7	63	== 1.3 Example3: Use RS485-LN with energy meters ==
1.2	64
57.16	65
41.7	66	=== 1.3.1 OverView ===
1.2	67
57.8	68
1.5	69	(((
57.8	70	(% style="color:red" %)Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	71	)))
1.2	72
1.5	73	(((
1.2	74	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	75	)))
1.2	76
13.2	77	[[image:image-20220527092419-5.png]]
1.2	78
	79	Connection1
	80
13.2	81
41.13	82
1.19	83	(((
57.16	84	(% style="color:blue" %)How to connect with Energy Meter：
57.8	85
	86
1.19	87	)))
1.2	88
1.19	89	(((
1.2	90	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	91	)))
1.2	92
1.19	93	(((
1.2	94	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	95	)))
1.2	96
1.19	97	(((
1.2	98	Power Source VIN to RS485-LN VIN+
1.19	99	)))
1.2	100
1.19	101	(((
1.2	102	Power Source GND to RS485-LN VIN-
1.19	103	)))
1.2	104
1.19	105	(((
1.2	106	Once there is power, the RS485-LN will be on.
1.19	107	)))
1.2	108
13.2	109	[[image:image-20220527092514-6.png]]
1.2	110
	111	Connection2
	112
	113
20.2	114	[[image:image-20220527092555-7.png]]
1.12	115
1.2	116	Connection3
	117
	118
41.7	119	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	120
57.8	121
1.7	122	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	123
51.2	124	[[image:image-20220601143257-10.png]]
1.2	125
20.2	126
57.8	127	(% style="color:blue" %)Example:(%%) AT+COMMAND1=01 03 00 00 00 01 84 0A
1.2	128
	129	* The first byte : slave address code (=001～247)
	130	* The second byte : read register value function code
	131	* 3rd and 4th bytes: start address of register to be read
	132	* 5th and 6th bytes: Number of registers to read
	133	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	134
1.12	135	(((
57.8	136
	137
	138
1.2	139	How to parse the reading of the return command of the parameter：
	140
57.8	141	(% style="color:blue" %)Example:(%%) RETURN1：01 03 02 08 FD 7E 05
1.8	142	)))
1.2	143
	144	* The first byte ARD: slave address code (=001～254)
	145	* The second byte: Return to read function code
	146	* 3rd byte: total number of bytes
	147	* 4th～5th bytes: register data
	148	* The 6th and 7th bytes: CRC16 checksum
	149	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	150
20.2	151	(% class="wikigeneratedid" %)
	152	(((
	153
57.8	154
	155
	156
20.2	157	)))
	158
41.2	159	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	160
57.8	161
1.2	162	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	163
20.2	164
57.8	165	==== 1.3.3.1 via AT COMMAND ====
1.2	166
	167
57.8	168	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.
	169
1.8	170	(((
1.2	171	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	172	)))
1.2	173
50.2	174	[[image:image-20220601143201-9.png]]
1.2	175
1.12	176	AT COMMAND
1.2	177
20.2	178
1.8	179	(% class="box infomessage" %)
	180	(((
57.8	181	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	182	)))
1.2	183
41.15	184	a: length for the return of AT+COMMAND
1.2	185
41.15	186	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	187
41.15	188	c: define the position for valid value.
1.2	189
50.2	190	[[image:image-20220601143115-8.png]]
1.2	191
	192	AT COMMAND
	193
20.2	194
41.15	195
1.2	196	PAYLOAD is available after the valid value is intercepted.
	197
1.8	198
48.2	199	[[image:image-20220601143046-7.png]]
1.2	200
	201	AT COMMAND
	202
20.2	203
41.16	204
1.2	205	You can get configured PAYLOAD on TTN.
	206
52.2	207	[[image:image-20220601143519-1.png]]
1.8	208
1.12	209	(((
1.2	210	AT COMMAND
1.12	211	)))
1.2	212
1.12	213	(((
1.13	214
	215	)))
	216
	217	(((
57.8	218	(% style="color:blue" %)Example:
39.3	219
57.17	220	CMD1: Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	221	)))
1.2	222
1.12	223	(((
57.8	224	RETURN1: 01 03 02 00 02 39 85 00 00(return data)
1.12	225	)))
1.2	226
1.12	227	(((
57.8	228	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	229
	230
1.12	231	)))
1.2	232
1.12	233	(((
57.17	234	CMD2: Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	235	)))
1.2	236
1.12	237	(((
57.8	238	RETURN2: 01 03 02 08 DC BE 1D(return data)
1.12	239	)))
1.2	240
1.12	241	(((
57.8	242	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	243
	244
1.12	245	)))
1.2	246
1.12	247	(((
57.17	248	CMD3: Read total active energy data with MODBUS command. address: 0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	249	)))
1.2	250
1.12	251	(((
57.9	252	RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
1.12	253	)))
1.2	254
1.12	255	(((
57.8	256	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	257	)))
1.2	258
1.12	259	(((
57.8	260	Payload: 01 00 02 39 85 08 DC 00 00 00 44
1.12	261	)))
1.2	262
47.2	263	[[image:image-20220601142936-6.png]]
1.2	264
	265	AT COMMAND
	266
20.2	267
21.2	268	(% 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	269
41.17	270
53.2	271	[[image:image-20220601143642-2.png]]
1.8	272
1.2	273	AT COMMAND
	274
	275
41.2	276	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	277
57.8	278
21.2	279	[[image:image-20220527093358-15.png]]
1.2	280
1.9	281	(((
1.2	282	DOWNLINK
1.9	283	)))
1.2	284
1.9	285	(((
	286
	287	)))
	288
	289	(((
39.4	290	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	291	)))
1.2	292
1.9	293	(((
4.3	294	(% class="box infomessage" %)
	295	(((
1.2	296	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	297	)))
4.3	298	)))
1.2	299
1.9	300	(((
57.11	301	(% style="color:red" %)Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	302	)))
1.2	303
1.9	304	(((
1.2	305	Format: AF MM NN LL XX XX XX XX YY
1.9	306	)))
1.2	307
1.9	308	(((
1.2	309	Where:
1.9	310	)))
1.2	311
1.9	312	(((
1.2	313	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	314	)))
1.2	315
1.9	316	(((
1.2	317	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	318	)))
1.2	319
1.9	320	(((
1.2	321	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	322	)))
1.2	323
1.9	324	(((
1.2	325	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	326	)))
1.2	327
1.9	328	(((
1.2	329	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	330	)))
1.2	331
1.9	332	(((
1.2	333	will execute an uplink after got this command.
1.9	334	)))
1.2	335
1.9	336	(((
41.18	337
	338
57.11	339	(% style="color:blue" %)Example:
1.9	340	)))
1.2	341
1.9	342	(((
39.4	343	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	344	)))
1.2	345
57.2	346	[[image:image-20220601144149-6.png]]
1.2	347
	348	DOWNLINK
	349
1.8	350
41.19	351
54.2	352	[[image:image-20220601143803-3.png]]
1.2	353
	354	DOWNLINK
	355
1.8	356
41.20	357
57.2	358	[[image:image-20220601144053-5.png]]
1.2	359
	360	DOWNLINK
	361
1.8	362
41.21	363
55.2	364	[[image:image-20220601143921-4.png]]
1.2	365
	366	DOWNLINK
	367
1.15	368
41.22	369
46.2	370	[[image:image-20220601142805-5.png]]
1.2	371
	372	DOWNLINK
	373
	374
41.2	375	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	376
1.13	377	(((
1.2	378	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	379	)))
1.2	380
1.13	381	(((
1.2	382	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	383	)))
1.2	384
1.13	385	(((
1.2	386	Open the serial port debugging, set the send and receive to HEX.
1.13	387	)))
1.2	388
1.13	389	(((
1.2	390	Baud rate: 9600
1.13	391	)))
1.2	392
1.13	393	(((
1.2	394	check digit: Even
57.11	395
	396
1.13	397	)))
1.2	398
27.2	399	[[image:image-20220527093708-21.png]]
1.2	400
	401	USB
	402
1.13	403
41.23	404
29.2	405	[[image:image-20220527093747-22.png]]
1.2	406
	407	USB
	408
1.13	409
41.24	410
1.13	411	(((
1.2	412	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	413
	414
1.13	415	)))
1.2	416
1.13	417	(((
57.11	418	(% style="color:blue" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	419	)))
1.2	420
1.13	421	(((
4.6	422	output：01 03 04 00 00 00 42 7A 02
57.11	423
	424
1.13	425	)))
1.2	426
29.2	427	[[image:image-20220527093821-23.png]]
1.2	428
	429	USB
	430
29.2	431
41.2	432	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	433
57.11	434
1.2	435	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.
	436
1.14	437	(((
1.15	438	(((
1.2	439	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	440	)))
1.15	441	)))
1.2	442
42.2	443	[[image:image-20220601142044-1.png]]
1.2	444
30.2	445
57.11	446	(% style="color:blue" %)Example(%%): These two meters are examples of setting parameters and device addresses.
1.2	447
31.2	448	[[image:image-20220527093950-25.png]]
1.2	449
57.4	450
32.2	451	[[image:image-20220527094028-26.png]]
1.2	452
57.12	453
1.14	454	(((
1.16	455	(((
1.2	456	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	457	)))
1.16	458	)))
1.2	459
1.14	460	(((
1.16	461	(((
57.12	462	We can use AT+CFGDEV to set the device address.
1.14	463	)))
1.16	464	)))
1.2	465
1.14	466	(((
1.16	467	(((
1.2	468	We modify the device address 01 of the first energy meter to 02.
1.14	469	)))
1.16	470	)))
1.2	471
43.2	472	[[image:image-20220601142354-2.png]]
1.2	473
57.12	474
35.2	475	(% class="box infomessage" %)
	476	(((
	477	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	478	)))
1.2	479
	480	* 01:device adaress
	481
	482	* 10:function code
	483
	484	* 00 61：Register address
	485
	486	* 00 01：Number of Registers
	487
	488	* 02：Number of bytes
	489
	490	* 00 02：Modified device address
	491
	492	* 1：Check code
	493
	494	The device address setting of the energy meter is complete.
	495
	496	Another energy meter is a single active energy meter with a floating-point format.
	497
	498	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	499
44.2	500	[[image:image-20220601142452-3.png]]
1.2	501
	502
45.2	503	[[image:image-20220601142607-4.png]]
35.2	504
57.12	505
39.5	506	PAYLOAD:01 08 DF 43 62
1.2	507
	508	* 08 DF is the valid value of the meter with device address 02.
	509	* 43 62 is the valid value of the meter with device address 01.
	510
57.12	511
1.2	512	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	513
	514
57.12	515	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.
	516
	517	The structure is like below:
	518
36.2	519	[[image:image-20220527094330-30.png]]
1.2	520
	521	Connection
	522
	523
57.13	524	* 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/]]
57.12	525
	526
1.2	527	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	528
57.12	529
1.2	530	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:
	531
57.13	532	* 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\|\|style="background-color: rgb(255, 255, 255);"]]
	533	* 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]]
1.2	534
	535
57.14	536	== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
1.2	537
57.13	538
1.2	539	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:
	540
57.13	541	* 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\|\|style="background-color: rgb(255, 255, 255);"]]
1.2	542
57.13	543
57.14	544	== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
1.2	545
57.13	546
38.1	547	[[image:image-20220527094556-31.png]]
1.2	548
	549	Network Structure
	550
57.13	551
1.2	552	* [[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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