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

Version 57.14 by Xiaoling on 2022/07/14 09:50

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
1.2	32	Related documents:
1.1	33
1.2	34	* [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
	35	* [[Configure Manual>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : Explanation on how to integrate to Node-red and to the Mobile Phone, and with link to the Github code.
	36	* [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
1.1	37
41.7	38	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	39
57.7	40
1.2	41	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	42
57.7	43
10.2	44	[[image:image-20220527092058-3.png]]
1.1	45
1.2	46	Connection
1.1	47
1.18	48
41.11	49
10.2	50	[[image:image-20220527092146-4.png]]
1.2	51
	52	Connection
	53
41.12	54
57.7	55	* 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	56	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	57
41.7	58	== 1.3 Example3: Use RS485-LN with energy meters ==
1.2	59
41.7	60	=== 1.3.1 OverView ===
1.2	61
57.8	62
1.5	63	(((
57.8	64	(% style="color:red" %)Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	65	)))
1.2	66
1.5	67	(((
1.2	68	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	69	)))
1.2	70
13.2	71	[[image:image-20220527092419-5.png]]
1.2	72
	73	Connection1
	74
13.2	75
41.13	76
1.19	77	(((
57.8	78	How to connect with Energy Meter：
	79
	80
1.19	81	)))
1.2	82
1.19	83	(((
1.2	84	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	85	)))
1.2	86
1.19	87	(((
1.2	88	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	89	)))
1.2	90
1.19	91	(((
1.2	92	Power Source VIN to RS485-LN VIN+
1.19	93	)))
1.2	94
1.19	95	(((
1.2	96	Power Source GND to RS485-LN VIN-
1.19	97	)))
1.2	98
1.19	99	(((
1.2	100	Once there is power, the RS485-LN will be on.
1.19	101	)))
1.2	102
13.2	103	[[image:image-20220527092514-6.png]]
1.2	104
	105	Connection2
	106
	107
41.14	108
20.2	109	[[image:image-20220527092555-7.png]]
1.12	110
1.2	111	Connection3
	112
	113
41.7	114	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	115
57.8	116
1.7	117	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	118
51.2	119	[[image:image-20220601143257-10.png]]
1.2	120
20.2	121
57.8	122	(% style="color:blue" %)Example:(%%) AT+COMMAND1=01 03 00 00 00 01 84 0A
1.2	123
	124	* The first byte : slave address code (=001～247)
	125	* The second byte : read register value function code
	126	* 3rd and 4th bytes: start address of register to be read
	127	* 5th and 6th bytes: Number of registers to read
	128	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	129
1.12	130	(((
57.8	131
	132
	133
1.2	134	How to parse the reading of the return command of the parameter：
	135
57.8	136	(% style="color:blue" %)Example:(%%) RETURN1：01 03 02 08 FD 7E 05
1.8	137	)))
1.2	138
	139	* The first byte ARD: slave address code (=001～254)
	140	* The second byte: Return to read function code
	141	* 3rd byte: total number of bytes
	142	* 4th～5th bytes: register data
	143	* The 6th and 7th bytes: CRC16 checksum
	144	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	145
20.2	146	(% class="wikigeneratedid" %)
	147	(((
	148
57.8	149
	150
	151
20.2	152	)))
	153
41.2	154	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	155
57.8	156
1.2	157	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	158
20.2	159
57.8	160	==== 1.3.3.1 via AT COMMAND ====
1.2	161
	162
57.8	163	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.
	164
1.8	165	(((
1.2	166	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	167	)))
1.2	168
50.2	169	[[image:image-20220601143201-9.png]]
1.2	170
1.12	171	AT COMMAND
1.2	172
20.2	173
1.8	174	(% class="box infomessage" %)
	175	(((
57.8	176	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	177	)))
1.2	178
41.15	179	a: length for the return of AT+COMMAND
1.2	180
41.15	181	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	182
41.15	183	c: define the position for valid value.
1.2	184
50.2	185	[[image:image-20220601143115-8.png]]
1.2	186
	187	AT COMMAND
	188
20.2	189
41.15	190
1.2	191	PAYLOAD is available after the valid value is intercepted.
	192
1.8	193
48.2	194	[[image:image-20220601143046-7.png]]
1.2	195
	196	AT COMMAND
	197
20.2	198
41.16	199
1.2	200	You can get configured PAYLOAD on TTN.
	201
52.2	202	[[image:image-20220601143519-1.png]]
1.8	203
1.12	204	(((
1.2	205	AT COMMAND
1.12	206	)))
1.2	207
1.12	208	(((
1.13	209
	210	)))
	211
	212	(((
57.8	213	(% style="color:blue" %)Example:
39.3	214
57.9	215	CMD1: Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	216	)))
1.2	217
1.12	218	(((
57.8	219	RETURN1: 01 03 02 00 02 39 85 00 00(return data)
1.12	220	)))
1.2	221
1.12	222	(((
57.8	223	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	224
	225
1.12	226	)))
1.2	227
1.12	228	(((
57.8	229	CMD2: Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	230	)))
1.2	231
1.12	232	(((
57.8	233	RETURN2: 01 03 02 08 DC BE 1D(return data)
1.12	234	)))
1.2	235
1.12	236	(((
57.8	237	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	238
	239
1.12	240	)))
1.2	241
1.12	242	(((
57.8	243	CMD3: Read total active energy data with MODBUS command. address: 0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	244	)))
1.2	245
1.12	246	(((
57.9	247	RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
1.12	248	)))
1.2	249
1.12	250	(((
57.8	251	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	252	)))
1.2	253
1.12	254	(((
57.8	255	Payload: 01 00 02 39 85 08 DC 00 00 00 44
1.12	256	)))
1.2	257
47.2	258	[[image:image-20220601142936-6.png]]
1.2	259
	260	AT COMMAND
	261
20.2	262
21.2	263	(% 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	264
41.17	265
53.2	266	[[image:image-20220601143642-2.png]]
1.8	267
1.2	268	AT COMMAND
	269
	270
41.2	271	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	272
57.8	273
21.2	274	[[image:image-20220527093358-15.png]]
1.2	275
1.9	276	(((
1.2	277	DOWNLINK
1.9	278	)))
1.2	279
1.9	280	(((
	281
	282	)))
	283
	284	(((
39.4	285	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	286	)))
1.2	287
1.9	288	(((
4.3	289	(% class="box infomessage" %)
	290	(((
1.2	291	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	292	)))
4.3	293	)))
1.2	294
1.9	295	(((
57.11	296	(% style="color:red" %)Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	297	)))
1.2	298
1.9	299	(((
1.2	300	Format: AF MM NN LL XX XX XX XX YY
1.9	301	)))
1.2	302
1.9	303	(((
1.2	304	Where:
1.9	305	)))
1.2	306
1.9	307	(((
1.2	308	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	309	)))
1.2	310
1.9	311	(((
1.2	312	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	313	)))
1.2	314
1.9	315	(((
1.2	316	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	317	)))
1.2	318
1.9	319	(((
1.2	320	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	321	)))
1.2	322
1.9	323	(((
1.2	324	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	325	)))
1.2	326
1.9	327	(((
1.2	328	will execute an uplink after got this command.
1.9	329	)))
1.2	330
1.9	331	(((
41.18	332
	333
57.11	334	(% style="color:blue" %)Example:
1.9	335	)))
1.2	336
1.9	337	(((
39.4	338	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	339	)))
1.2	340
57.2	341	[[image:image-20220601144149-6.png]]
1.2	342
	343	DOWNLINK
	344
1.8	345
41.19	346
54.2	347	[[image:image-20220601143803-3.png]]
1.2	348
	349	DOWNLINK
	350
1.8	351
41.20	352
57.2	353	[[image:image-20220601144053-5.png]]
1.2	354
	355	DOWNLINK
	356
1.8	357
41.21	358
55.2	359	[[image:image-20220601143921-4.png]]
1.2	360
	361	DOWNLINK
	362
1.15	363
41.22	364
46.2	365	[[image:image-20220601142805-5.png]]
1.2	366
	367	DOWNLINK
	368
	369
41.2	370	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	371
1.13	372	(((
1.2	373	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	374	)))
1.2	375
1.13	376	(((
1.2	377	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	378	)))
1.2	379
1.13	380	(((
1.2	381	Open the serial port debugging, set the send and receive to HEX.
1.13	382	)))
1.2	383
1.13	384	(((
1.2	385	Baud rate: 9600
1.13	386	)))
1.2	387
1.13	388	(((
1.2	389	check digit: Even
57.11	390
	391
1.13	392	)))
1.2	393
27.2	394	[[image:image-20220527093708-21.png]]
1.2	395
	396	USB
	397
1.13	398
41.23	399
29.2	400	[[image:image-20220527093747-22.png]]
1.2	401
	402	USB
	403
1.13	404
41.24	405
1.13	406	(((
1.2	407	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	408
	409
1.13	410	)))
1.2	411
1.13	412	(((
57.11	413	(% style="color:blue" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	414	)))
1.2	415
1.13	416	(((
4.6	417	output：01 03 04 00 00 00 42 7A 02
57.11	418
	419
1.13	420	)))
1.2	421
29.2	422	[[image:image-20220527093821-23.png]]
1.2	423
	424	USB
	425
29.2	426
41.2	427	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	428
57.11	429
1.2	430	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.
	431
1.14	432	(((
1.15	433	(((
1.2	434	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	435	)))
1.15	436	)))
1.2	437
42.2	438	[[image:image-20220601142044-1.png]]
1.2	439
30.2	440
57.11	441	(% style="color:blue" %)Example(%%): These two meters are examples of setting parameters and device addresses.
1.2	442
31.2	443	[[image:image-20220527093950-25.png]]
1.2	444
57.4	445
32.2	446	[[image:image-20220527094028-26.png]]
1.2	447
57.12	448
1.14	449	(((
1.16	450	(((
1.2	451	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	452	)))
1.16	453	)))
1.2	454
1.14	455	(((
1.16	456	(((
57.12	457	We can use AT+CFGDEV to set the device address.
1.14	458	)))
1.16	459	)))
1.2	460
1.14	461	(((
1.16	462	(((
1.2	463	We modify the device address 01 of the first energy meter to 02.
1.14	464	)))
1.16	465	)))
1.2	466
43.2	467	[[image:image-20220601142354-2.png]]
1.2	468
57.12	469
35.2	470	(% class="box infomessage" %)
	471	(((
	472	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	473	)))
1.2	474
	475	* 01:device adaress
	476
	477	* 10:function code
	478
	479	* 00 61：Register address
	480
	481	* 00 01：Number of Registers
	482
	483	* 02：Number of bytes
	484
	485	* 00 02：Modified device address
	486
	487	* 1：Check code
	488
	489	The device address setting of the energy meter is complete.
	490
	491	Another energy meter is a single active energy meter with a floating-point format.
	492
	493	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	494
44.2	495	[[image:image-20220601142452-3.png]]
1.2	496
	497
45.2	498	[[image:image-20220601142607-4.png]]
35.2	499
57.12	500
39.5	501	PAYLOAD:01 08 DF 43 62
1.2	502
	503	* 08 DF is the valid value of the meter with device address 02.
	504	* 43 62 is the valid value of the meter with device address 01.
	505
57.12	506
	507
	508
1.2	509	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	510
	511
57.12	512	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.
	513
	514	The structure is like below:
	515
36.2	516	[[image:image-20220527094330-30.png]]
1.2	517
	518	Connection
	519
	520
57.13	521	* 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	522
	523
	524
	525
1.2	526	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	527
57.12	528
1.2	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-BL to connect to SEM Three Energy Meter and send the data to mobile phone for remote minitor. The structure is like below:
	530
57.13	531	* 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);"]]
	532	* 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	533
	534
57.12	535
	536
57.14	537	== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
1.2	538
57.13	539
1.2	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 CEM C31 485-T1-MID and send the data for remote minitor. The structure is like below:
	541
57.13	542	* 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	543
57.13	544
	545
	546
57.14	547	== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
1.2	548
57.13	549
38.1	550	[[image:image-20220527094556-31.png]]
1.2	551
	552	Network Structure
	553
57.13	554
1.2	555	* [[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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