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

Version 60.7 by Xiaoling on 2022/09/19 16:08

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
60.5	16
41.7	17	== 1.1 Example 1: Connect to Leak relay and VFD ==
1.1	18
57.6	19
1.2	20	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	21
60.5	22
10.2	23	[[image:image-20220527091852-1.png]]
1.1	24
1.2	25	Connection
1.1	26
1.18	27
1.1	28
10.2	29	[[image:image-20220527091942-2.png]](% style="display:none" %)
	30
1.2	31	Connection
1.1	32
10.2	33
57.15	34	(% style="color:blue" %)Related documents:
1.1	35
60.1	36	* 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);"]]
	37	* 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	38	* [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
1.1	39
57.20	40
60.2	41
60.7	42
41.7	43	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	44
57.7	45
1.2	46	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	47
57.7	48
10.2	49	[[image:image-20220527092058-3.png]]
1.1	50
1.2	51	Connection
1.1	52
1.18	53
41.11	54
10.2	55	[[image:image-20220527092146-4.png]]
1.2	56
	57	Connection
	58
41.12	59
57.15	60	(% style="color:blue" %)Related documents:
	61
60.1	62	* 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	63	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	64
57.15	65
60.2	66
60.7	67
41.7	68	== 1.3 Example3: Use RS485-LN with energy meters ==
1.2	69
57.16	70
41.7	71	=== 1.3.1 OverView ===
1.2	72
57.8	73
1.5	74	(((
60.4	75	(% style="color:red" %)Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	76	)))
1.2	77
1.5	78	(((
1.2	79	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
60.6	80
	81
1.5	82	)))
1.2	83
13.2	84	[[image:image-20220527092419-5.png]]
1.2	85
	86	Connection1
	87
13.2	88
41.13	89
1.19	90	(((
57.16	91	(% style="color:blue" %)How to connect with Energy Meter：
57.8	92
	93
1.19	94	)))
1.2	95
1.19	96	(((
1.2	97	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	98	)))
1.2	99
1.19	100	(((
1.2	101	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	102	)))
1.2	103
1.19	104	(((
1.2	105	Power Source VIN to RS485-LN VIN+
1.19	106	)))
1.2	107
1.19	108	(((
1.2	109	Power Source GND to RS485-LN VIN-
1.19	110	)))
1.2	111
1.19	112	(((
1.2	113	Once there is power, the RS485-LN will be on.
60.2	114
	115
1.19	116	)))
1.2	117
13.2	118	[[image:image-20220527092514-6.png]]
1.2	119
	120	Connection2
	121
	122
60.2	123
20.2	124	[[image:image-20220527092555-7.png]]
1.12	125
1.2	126	Connection3
	127
	128
57.21	129
41.7	130	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	131
57.8	132
1.7	133	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	134
51.2	135	[[image:image-20220601143257-10.png]]
1.2	136
20.2	137
57.8	138	(% style="color:blue" %)Example:(%%) AT+COMMAND1=01 03 00 00 00 01 84 0A
1.2	139
	140	* The first byte : slave address code (=001～247)
	141	* The second byte : read register value function code
	142	* 3rd and 4th bytes: start address of register to be read
	143	* 5th and 6th bytes: Number of registers to read
	144	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	145
1.12	146	(((
57.8	147
	148
	149
1.2	150	How to parse the reading of the return command of the parameter：
	151
57.8	152	(% style="color:blue" %)Example:(%%) RETURN1：01 03 02 08 FD 7E 05
1.8	153	)))
1.2	154
	155	* The first byte ARD: slave address code (=001～254)
	156	* The second byte: Return to read function code
	157	* 3rd byte: total number of bytes
	158	* 4th～5th bytes: register data
	159	* The 6th and 7th bytes: CRC16 checksum
	160	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	161
20.2	162	(% class="wikigeneratedid" %)
	163	(((
	164
57.8	165
	166
	167
20.2	168	)))
	169
41.2	170	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	171
57.8	172
1.2	173	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	174
20.2	175
57.21	176
57.8	177	==== 1.3.3.1 via AT COMMAND ====
1.2	178
	179
57.8	180	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.
	181
1.8	182	(((
1.2	183	If the configured parameters and commands are incorrect, the return value is not obtained.
60.6	184
	185
1.8	186	)))
1.2	187
50.2	188	[[image:image-20220601143201-9.png]]
1.2	189
1.12	190	AT COMMAND
1.2	191
20.2	192
1.8	193	(% class="box infomessage" %)
	194	(((
60.1	195	(% _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	196	)))
1.2	197
41.15	198	a: length for the return of AT+COMMAND
1.2	199
41.15	200	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	201
41.15	202	c: define the position for valid value.
1.2	203
50.2	204	[[image:image-20220601143115-8.png]]
1.2	205
	206	AT COMMAND
	207
20.2	208
41.15	209
1.2	210	PAYLOAD is available after the valid value is intercepted.
	211
1.8	212
48.2	213	[[image:image-20220601143046-7.png]]
1.2	214
	215	AT COMMAND
	216
20.2	217
41.16	218
1.2	219	You can get configured PAYLOAD on TTN.
	220
52.2	221	[[image:image-20220601143519-1.png]]
1.8	222
1.12	223	(((
1.2	224	AT COMMAND
1.12	225	)))
1.2	226
1.12	227	(((
1.13	228
60.2	229
	230
1.13	231	)))
	232
	233	(((
57.8	234	(% style="color:blue" %)Example:
39.3	235
60.6	236
57.18	237	(% style="color:red" %)CMD1:(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	238	)))
1.2	239
1.12	240	(((
57.8	241	RETURN1: 01 03 02 00 02 39 85 00 00(return data)
1.12	242	)))
1.2	243
1.12	244	(((
57.8	245	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	246
	247
1.12	248	)))
1.2	249
1.12	250	(((
57.18	251	(% style="color:red" %)CMD2: (%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	252	)))
1.2	253
1.12	254	(((
57.8	255	RETURN2: 01 03 02 08 DC BE 1D(return data)
1.12	256	)))
1.2	257
1.12	258	(((
57.8	259	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	260
	261
1.12	262	)))
1.2	263
1.12	264	(((
57.18	265	(% 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	266	)))
1.2	267
1.12	268	(((
57.9	269	RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
1.12	270	)))
1.2	271
1.12	272	(((
57.8	273	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	274	)))
1.2	275
1.12	276	(((
57.8	277	Payload: 01 00 02 39 85 08 DC 00 00 00 44
60.6	278
	279
1.12	280	)))
1.2	281
47.2	282	[[image:image-20220601142936-6.png]]
1.2	283
	284	AT COMMAND
	285
20.2	286
60.2	287
60.6	288	(% style="color:blue" %)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	289
41.17	290
53.2	291	[[image:image-20220601143642-2.png]]
1.8	292
1.2	293	AT COMMAND
	294
	295
57.21	296
41.2	297	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	298
57.8	299
21.2	300	[[image:image-20220527093358-15.png]]
1.2	301
1.9	302	(((
1.2	303	DOWNLINK
1.9	304	)))
1.2	305
1.9	306	(((
	307
	308	)))
	309
	310	(((
60.7	311	(% style="color:blue" %)Type Code 0xAF
1.9	312	)))
1.2	313
1.9	314	(((
4.3	315	(% class="box infomessage" %)
	316	(((
1.2	317	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	318	)))
4.3	319	)))
1.2	320
1.9	321	(((
57.26	322	(% style="color:red" %)Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
60.2	323
	324
1.9	325	)))
1.2	326
1.9	327	(((
1.2	328	Format: AF MM NN LL XX XX XX XX YY
1.9	329	)))
1.2	330
1.9	331	(((
1.2	332	Where:
1.9	333	)))
1.2	334
1.9	335	(((
1.2	336	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	337	)))
1.2	338
1.9	339	(((
1.2	340	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	341	)))
1.2	342
1.9	343	(((
1.2	344	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	345	)))
1.2	346
1.9	347	(((
1.2	348	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	349	)))
1.2	350
1.9	351	(((
1.2	352	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	353	)))
1.2	354
1.9	355	(((
1.2	356	will execute an uplink after got this command.
1.9	357	)))
1.2	358
1.9	359	(((
41.18	360
	361
57.11	362	(% style="color:blue" %)Example:
1.9	363	)))
1.2	364
1.9	365	(((
39.4	366	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	367	)))
1.2	368
57.2	369	[[image:image-20220601144149-6.png]]
1.2	370
	371	DOWNLINK
	372
1.8	373
41.19	374
54.2	375	[[image:image-20220601143803-3.png]]
1.2	376
	377	DOWNLINK
	378
1.8	379
41.20	380
57.2	381	[[image:image-20220601144053-5.png]]
1.2	382
	383	DOWNLINK
	384
1.8	385
41.21	386
55.2	387	[[image:image-20220601143921-4.png]]
1.2	388
	389	DOWNLINK
	390
1.15	391
41.22	392
46.2	393	[[image:image-20220601142805-5.png]]
1.2	394
	395	DOWNLINK
	396
	397
57.21	398
41.2	399	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	400
60.2	401
1.13	402	(((
1.2	403	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	404	)))
1.2	405
1.13	406	(((
1.2	407	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	408	)))
1.2	409
1.13	410	(((
1.2	411	Open the serial port debugging, set the send and receive to HEX.
1.13	412	)))
1.2	413
1.13	414	(((
1.2	415	Baud rate: 9600
1.13	416	)))
1.2	417
1.13	418	(((
1.2	419	check digit: Even
57.11	420
	421
1.13	422	)))
1.2	423
27.2	424	[[image:image-20220527093708-21.png]]
1.2	425
	426	USB
	427
1.13	428
41.23	429
29.2	430	[[image:image-20220527093747-22.png]]
1.2	431
	432	USB
	433
1.13	434
41.24	435
1.13	436	(((
1.2	437	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	438
	439
1.13	440	)))
1.2	441
1.13	442	(((
57.11	443	(% style="color:blue" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	444	)))
1.2	445
1.13	446	(((
4.6	447	output：01 03 04 00 00 00 42 7A 02
57.11	448
	449
1.13	450	)))
1.2	451
29.2	452	[[image:image-20220527093821-23.png]]
1.2	453
	454	USB
	455
29.2	456
57.21	457
41.2	458	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	459
57.11	460
1.2	461	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.
	462
1.14	463	(((
1.15	464	(((
1.2	465	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	466	)))
1.15	467	)))
1.2	468
42.2	469	[[image:image-20220601142044-1.png]]
1.2	470
30.2	471
57.11	472	(% style="color:blue" %)Example(%%): These two meters are examples of setting parameters and device addresses.
1.2	473
31.2	474	[[image:image-20220527093950-25.png]]
1.2	475
57.4	476
32.2	477	[[image:image-20220527094028-26.png]]
1.2	478
57.12	479
1.14	480	(((
1.16	481	(((
1.2	482	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	483	)))
1.16	484	)))
1.2	485
1.14	486	(((
1.16	487	(((
57.27	488	We can use (% style="color:blue" %)AT+CFGDEV(%%) to set the device address.
1.14	489	)))
1.16	490	)))
1.2	491
1.14	492	(((
1.16	493	(((
1.2	494	We modify the device address 01 of the first energy meter to 02.
1.14	495	)))
1.16	496	)))
1.2	497
43.2	498	[[image:image-20220601142354-2.png]]
1.2	499
57.12	500
35.2	501	(% class="box infomessage" %)
	502	(((
	503	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	504	)))
1.2	505
	506	* 01:device adaress
	507
	508	* 10:function code
	509
	510	* 00 61：Register address
	511
	512	* 00 01：Number of Registers
	513
	514	* 02：Number of bytes
	515
	516	* 00 02：Modified device address
	517
	518	* 1：Check code
	519
	520	The device address setting of the energy meter is complete.
	521
	522	Another energy meter is a single active energy meter with a floating-point format.
	523
	524	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	525
44.2	526	[[image:image-20220601142452-3.png]]
1.2	527
	528
45.2	529	[[image:image-20220601142607-4.png]]
35.2	530
57.12	531
57.21	532	(% style="color:blue" %)PAYLOAD: 01 08 DF 43 62
1.2	533
	534	* 08 DF is the valid value of the meter with device address 02.
	535	* 43 62 is the valid value of the meter with device address 01.
	536
	537	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	538
	539
57.12	540	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.
	541
	542	The structure is like below:
	543
36.2	544	[[image:image-20220527094330-30.png]]
1.2	545
	546	Connection
	547
	548
60.1	549	* 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	550
1.2	551	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	552
57.12	553
1.2	554	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:
	555
60.1	556	* 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);"]]
	557	* 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	558
57.14	559	== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
1.2	560
57.13	561
1.2	562	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:
	563
60.1	564	* 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	565
57.14	566	== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
1.2	567
57.13	568
38.1	569	[[image:image-20220527094556-31.png]]
1.2	570
	571	Network Structure
	572
57.13	573
1.2	574	* [[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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