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

Version 60.1 by Bei Jinggeng on 2022/07/14 17:16

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
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
60.1	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/\|\|_mstmutation="1"]]
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
41.7	62	== 1.3 Example3: Use RS485-LN with energy meters ==
1.2	63
57.16	64
41.7	65	=== 1.3.1 OverView ===
1.2	66
57.8	67
1.5	68	(((
57.8	69	(% style="color:red" %)Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	70	)))
1.2	71
1.5	72	(((
1.2	73	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	74	)))
1.2	75
13.2	76	[[image:image-20220527092419-5.png]]
1.2	77
	78	Connection1
	79
13.2	80
41.13	81
1.19	82	(((
57.16	83	(% style="color:blue" %)How to connect with Energy Meter：
57.8	84
	85
1.19	86	)))
1.2	87
1.19	88	(((
1.2	89	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	90	)))
1.2	91
1.19	92	(((
1.2	93	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	94	)))
1.2	95
1.19	96	(((
1.2	97	Power Source VIN to RS485-LN VIN+
1.19	98	)))
1.2	99
1.19	100	(((
1.2	101	Power Source GND to RS485-LN VIN-
1.19	102	)))
1.2	103
1.19	104	(((
1.2	105	Once there is power, the RS485-LN will be on.
1.19	106	)))
1.2	107
13.2	108	[[image:image-20220527092514-6.png]]
1.2	109
	110	Connection2
	111
	112
20.2	113	[[image:image-20220527092555-7.png]]
1.12	114
1.2	115	Connection3
	116
	117
57.21	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
57.21	165
57.8	166	==== 1.3.3.1 via AT COMMAND ====
1.2	167
	168
57.8	169	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.
	170
1.8	171	(((
1.2	172	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	173	)))
1.2	174
50.2	175	[[image:image-20220601143201-9.png]]
1.2	176
1.12	177	AT COMMAND
1.2	178
20.2	179
1.8	180	(% class="box infomessage" %)
	181	(((
60.1	182	(% _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	183	)))
1.2	184
41.15	185	a: length for the return of AT+COMMAND
1.2	186
41.15	187	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	188
41.15	189	c: define the position for valid value.
1.2	190
50.2	191	[[image:image-20220601143115-8.png]]
1.2	192
	193	AT COMMAND
	194
20.2	195
41.15	196
1.2	197	PAYLOAD is available after the valid value is intercepted.
	198
1.8	199
48.2	200	[[image:image-20220601143046-7.png]]
1.2	201
	202	AT COMMAND
	203
20.2	204
41.16	205
1.2	206	You can get configured PAYLOAD on TTN.
	207
52.2	208	[[image:image-20220601143519-1.png]]
1.8	209
1.12	210	(((
1.2	211	AT COMMAND
1.12	212	)))
1.2	213
1.12	214	(((
1.13	215
	216	)))
	217
	218	(((
57.8	219	(% style="color:blue" %)Example:
39.3	220
57.18	221	(% style="color:red" %)CMD1:(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	222	)))
1.2	223
1.12	224	(((
57.8	225	RETURN1: 01 03 02 00 02 39 85 00 00(return data)
1.12	226	)))
1.2	227
1.12	228	(((
57.8	229	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	230
	231
1.12	232	)))
1.2	233
1.12	234	(((
57.18	235	(% style="color:red" %)CMD2: (%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	236	)))
1.2	237
1.12	238	(((
57.8	239	RETURN2: 01 03 02 08 DC BE 1D(return data)
1.12	240	)))
1.2	241
1.12	242	(((
57.8	243	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	244
	245
1.12	246	)))
1.2	247
1.12	248	(((
57.18	249	(% 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	250	)))
1.2	251
1.12	252	(((
57.9	253	RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
1.12	254	)))
1.2	255
1.12	256	(((
57.8	257	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	258	)))
1.2	259
1.12	260	(((
57.8	261	Payload: 01 00 02 39 85 08 DC 00 00 00 44
1.12	262	)))
1.2	263
47.2	264	[[image:image-20220601142936-6.png]]
1.2	265
	266	AT COMMAND
	267
20.2	268
21.2	269	(% 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	270
41.17	271
53.2	272	[[image:image-20220601143642-2.png]]
1.8	273
1.2	274	AT COMMAND
	275
	276
57.21	277
41.2	278	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	279
57.8	280
21.2	281	[[image:image-20220527093358-15.png]]
1.2	282
1.9	283	(((
1.2	284	DOWNLINK
1.9	285	)))
1.2	286
1.9	287	(((
	288
	289	)))
	290
	291	(((
39.4	292	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	293	)))
1.2	294
1.9	295	(((
4.3	296	(% class="box infomessage" %)
	297	(((
1.2	298	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	299	)))
4.3	300	)))
1.2	301
1.9	302	(((
57.26	303	(% style="color:red" %)Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	304	)))
1.2	305
1.9	306	(((
1.2	307	Format: AF MM NN LL XX XX XX XX YY
1.9	308	)))
1.2	309
1.9	310	(((
1.2	311	Where:
1.9	312	)))
1.2	313
1.9	314	(((
1.2	315	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	316	)))
1.2	317
1.9	318	(((
1.2	319	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	320	)))
1.2	321
1.9	322	(((
1.2	323	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	324	)))
1.2	325
1.9	326	(((
1.2	327	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	328	)))
1.2	329
1.9	330	(((
1.2	331	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	332	)))
1.2	333
1.9	334	(((
1.2	335	will execute an uplink after got this command.
1.9	336	)))
1.2	337
1.9	338	(((
41.18	339
	340
57.11	341	(% style="color:blue" %)Example:
1.9	342	)))
1.2	343
1.9	344	(((
39.4	345	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	346	)))
1.2	347
57.2	348	[[image:image-20220601144149-6.png]]
1.2	349
	350	DOWNLINK
	351
1.8	352
41.19	353
54.2	354	[[image:image-20220601143803-3.png]]
1.2	355
	356	DOWNLINK
	357
1.8	358
41.20	359
57.2	360	[[image:image-20220601144053-5.png]]
1.2	361
	362	DOWNLINK
	363
1.8	364
41.21	365
55.2	366	[[image:image-20220601143921-4.png]]
1.2	367
	368	DOWNLINK
	369
1.15	370
41.22	371
46.2	372	[[image:image-20220601142805-5.png]]
1.2	373
	374	DOWNLINK
	375
	376
57.21	377
41.2	378	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	379
1.13	380	(((
1.2	381	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	382	)))
1.2	383
1.13	384	(((
1.2	385	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	386	)))
1.2	387
1.13	388	(((
1.2	389	Open the serial port debugging, set the send and receive to HEX.
1.13	390	)))
1.2	391
1.13	392	(((
1.2	393	Baud rate: 9600
1.13	394	)))
1.2	395
1.13	396	(((
1.2	397	check digit: Even
57.11	398
	399
1.13	400	)))
1.2	401
27.2	402	[[image:image-20220527093708-21.png]]
1.2	403
	404	USB
	405
1.13	406
41.23	407
29.2	408	[[image:image-20220527093747-22.png]]
1.2	409
	410	USB
	411
1.13	412
41.24	413
1.13	414	(((
1.2	415	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	416
	417
1.13	418	)))
1.2	419
1.13	420	(((
57.11	421	(% style="color:blue" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	422	)))
1.2	423
1.13	424	(((
4.6	425	output：01 03 04 00 00 00 42 7A 02
57.11	426
	427
1.13	428	)))
1.2	429
29.2	430	[[image:image-20220527093821-23.png]]
1.2	431
	432	USB
	433
29.2	434
57.21	435
41.2	436	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	437
57.11	438
1.2	439	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.
	440
1.14	441	(((
1.15	442	(((
1.2	443	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	444	)))
1.15	445	)))
1.2	446
42.2	447	[[image:image-20220601142044-1.png]]
1.2	448
30.2	449
57.11	450	(% style="color:blue" %)Example(%%): These two meters are examples of setting parameters and device addresses.
1.2	451
31.2	452	[[image:image-20220527093950-25.png]]
1.2	453
57.4	454
32.2	455	[[image:image-20220527094028-26.png]]
1.2	456
57.12	457
1.14	458	(((
1.16	459	(((
1.2	460	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	461	)))
1.16	462	)))
1.2	463
1.14	464	(((
1.16	465	(((
57.27	466	We can use (% style="color:blue" %)AT+CFGDEV(%%) to set the device address.
1.14	467	)))
1.16	468	)))
1.2	469
1.14	470	(((
1.16	471	(((
1.2	472	We modify the device address 01 of the first energy meter to 02.
1.14	473	)))
1.16	474	)))
1.2	475
43.2	476	[[image:image-20220601142354-2.png]]
1.2	477
57.12	478
35.2	479	(% class="box infomessage" %)
	480	(((
	481	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	482	)))
1.2	483
	484	* 01:device adaress
	485
	486	* 10:function code
	487
	488	* 00 61：Register address
	489
	490	* 00 01：Number of Registers
	491
	492	* 02：Number of bytes
	493
	494	* 00 02：Modified device address
	495
	496	* 1：Check code
	497
	498	The device address setting of the energy meter is complete.
	499
	500	Another energy meter is a single active energy meter with a floating-point format.
	501
	502	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	503
44.2	504	[[image:image-20220601142452-3.png]]
1.2	505
	506
45.2	507	[[image:image-20220601142607-4.png]]
35.2	508
57.12	509
57.21	510	(% style="color:blue" %)PAYLOAD: 01 08 DF 43 62
1.2	511
	512	* 08 DF is the valid value of the meter with device address 02.
	513	* 43 62 is the valid value of the meter with device address 01.
	514
57.21	515
1.2	516	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	517
	518
57.12	519	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.
	520
	521	The structure is like below:
	522
36.2	523	[[image:image-20220527094330-30.png]]
1.2	524
	525	Connection
	526
	527
60.1	528	* 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	529
57.21	530
1.2	531	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	532
57.12	533
1.2	534	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:
	535
60.1	536	* 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);"]]
	537	* 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	538
57.22	539
57.14	540	== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
1.2	541
57.13	542
1.2	543	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:
	544
60.1	545	* 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	546
57.23	547
57.14	548	== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
1.2	549
57.13	550
38.1	551	[[image:image-20220527094556-31.png]]
1.2	552
	553	Network Structure
	554
57.13	555
1.2	556	* [[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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