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

Version 57.16 by Xiaoling on 2022/07/14 09:55

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
	39
41.7	40	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	41
57.7	42
1.2	43	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	44
57.7	45
10.2	46	[[image:image-20220527092058-3.png]]
1.1	47
1.2	48	Connection
1.1	49
1.18	50
41.11	51
10.2	52	[[image:image-20220527092146-4.png]]
1.2	53
	54	Connection
	55
41.12	56
57.15	57	(% style="color:blue" %)Related documents:
	58
	59	* 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	60	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	61
57.15	62
	63
	64
41.7	65	== 1.3 Example3: Use RS485-LN with energy meters ==
1.2	66
57.16	67
41.7	68	=== 1.3.1 OverView ===
1.2	69
57.8	70
1.5	71	(((
57.8	72	(% style="color:red" %)Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	73	)))
1.2	74
1.5	75	(((
1.2	76	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	77	)))
1.2	78
13.2	79	[[image:image-20220527092419-5.png]]
1.2	80
	81	Connection1
	82
13.2	83
41.13	84
1.19	85	(((
57.16	86	(% style="color:blue" %)How to connect with Energy Meter：
57.8	87
	88
1.19	89	)))
1.2	90
1.19	91	(((
1.2	92	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	93	)))
1.2	94
1.19	95	(((
1.2	96	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	97	)))
1.2	98
1.19	99	(((
1.2	100	Power Source VIN to RS485-LN VIN+
1.19	101	)))
1.2	102
1.19	103	(((
1.2	104	Power Source GND to RS485-LN VIN-
1.19	105	)))
1.2	106
1.19	107	(((
1.2	108	Once there is power, the RS485-LN will be on.
1.19	109	)))
1.2	110
13.2	111	[[image:image-20220527092514-6.png]]
1.2	112
	113	Connection2
	114
	115
41.14	116
20.2	117	[[image:image-20220527092555-7.png]]
1.12	118
1.2	119	Connection3
	120
	121
41.7	122	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	123
57.8	124
1.7	125	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	126
51.2	127	[[image:image-20220601143257-10.png]]
1.2	128
20.2	129
57.8	130	(% style="color:blue" %)Example:(%%) AT+COMMAND1=01 03 00 00 00 01 84 0A
1.2	131
	132	* The first byte : slave address code (=001～247)
	133	* The second byte : read register value function code
	134	* 3rd and 4th bytes: start address of register to be read
	135	* 5th and 6th bytes: Number of registers to read
	136	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	137
1.12	138	(((
57.8	139
	140
	141
1.2	142	How to parse the reading of the return command of the parameter：
	143
57.8	144	(% style="color:blue" %)Example:(%%) RETURN1：01 03 02 08 FD 7E 05
1.8	145	)))
1.2	146
	147	* The first byte ARD: slave address code (=001～254)
	148	* The second byte: Return to read function code
	149	* 3rd byte: total number of bytes
	150	* 4th～5th bytes: register data
	151	* The 6th and 7th bytes: CRC16 checksum
	152	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	153
20.2	154	(% class="wikigeneratedid" %)
	155	(((
	156
57.8	157
	158
	159
20.2	160	)))
	161
41.2	162	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	163
57.8	164
1.2	165	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	166
20.2	167
57.8	168	==== 1.3.3.1 via AT COMMAND ====
1.2	169
	170
57.8	171	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.
	172
1.8	173	(((
1.2	174	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	175	)))
1.2	176
50.2	177	[[image:image-20220601143201-9.png]]
1.2	178
1.12	179	AT COMMAND
1.2	180
20.2	181
1.8	182	(% class="box infomessage" %)
	183	(((
57.8	184	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	185	)))
1.2	186
41.15	187	a: length for the return of AT+COMMAND
1.2	188
41.15	189	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	190
41.15	191	c: define the position for valid value.
1.2	192
50.2	193	[[image:image-20220601143115-8.png]]
1.2	194
	195	AT COMMAND
	196
20.2	197
41.15	198
1.2	199	PAYLOAD is available after the valid value is intercepted.
	200
1.8	201
48.2	202	[[image:image-20220601143046-7.png]]
1.2	203
	204	AT COMMAND
	205
20.2	206
41.16	207
1.2	208	You can get configured PAYLOAD on TTN.
	209
52.2	210	[[image:image-20220601143519-1.png]]
1.8	211
1.12	212	(((
1.2	213	AT COMMAND
1.12	214	)))
1.2	215
1.12	216	(((
1.13	217
	218	)))
	219
	220	(((
57.8	221	(% style="color:blue" %)Example:
39.3	222
57.9	223	CMD1: Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	224	)))
1.2	225
1.12	226	(((
57.8	227	RETURN1: 01 03 02 00 02 39 85 00 00(return data)
1.12	228	)))
1.2	229
1.12	230	(((
57.8	231	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	232
	233
1.12	234	)))
1.2	235
1.12	236	(((
57.8	237	CMD2: Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	238	)))
1.2	239
1.12	240	(((
57.8	241	RETURN2: 01 03 02 08 DC BE 1D(return data)
1.12	242	)))
1.2	243
1.12	244	(((
57.8	245	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	246
	247
1.12	248	)))
1.2	249
1.12	250	(((
57.8	251	CMD3: Read total active energy data with MODBUS command. address: 0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	252	)))
1.2	253
1.12	254	(((
57.9	255	RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
1.12	256	)))
1.2	257
1.12	258	(((
57.8	259	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	260	)))
1.2	261
1.12	262	(((
57.8	263	Payload: 01 00 02 39 85 08 DC 00 00 00 44
1.12	264	)))
1.2	265
47.2	266	[[image:image-20220601142936-6.png]]
1.2	267
	268	AT COMMAND
	269
20.2	270
21.2	271	(% 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	272
41.17	273
53.2	274	[[image:image-20220601143642-2.png]]
1.8	275
1.2	276	AT COMMAND
	277
	278
41.2	279	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	280
57.8	281
21.2	282	[[image:image-20220527093358-15.png]]
1.2	283
1.9	284	(((
1.2	285	DOWNLINK
1.9	286	)))
1.2	287
1.9	288	(((
	289
	290	)))
	291
	292	(((
39.4	293	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	294	)))
1.2	295
1.9	296	(((
4.3	297	(% class="box infomessage" %)
	298	(((
1.2	299	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	300	)))
4.3	301	)))
1.2	302
1.9	303	(((
57.11	304	(% style="color:red" %)Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	305	)))
1.2	306
1.9	307	(((
1.2	308	Format: AF MM NN LL XX XX XX XX YY
1.9	309	)))
1.2	310
1.9	311	(((
1.2	312	Where:
1.9	313	)))
1.2	314
1.9	315	(((
1.2	316	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	317	)))
1.2	318
1.9	319	(((
1.2	320	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	321	)))
1.2	322
1.9	323	(((
1.2	324	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	325	)))
1.2	326
1.9	327	(((
1.2	328	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	329	)))
1.2	330
1.9	331	(((
1.2	332	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	333	)))
1.2	334
1.9	335	(((
1.2	336	will execute an uplink after got this command.
1.9	337	)))
1.2	338
1.9	339	(((
41.18	340
	341
57.11	342	(% style="color:blue" %)Example:
1.9	343	)))
1.2	344
1.9	345	(((
39.4	346	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	347	)))
1.2	348
57.2	349	[[image:image-20220601144149-6.png]]
1.2	350
	351	DOWNLINK
	352
1.8	353
41.19	354
54.2	355	[[image:image-20220601143803-3.png]]
1.2	356
	357	DOWNLINK
	358
1.8	359
41.20	360
57.2	361	[[image:image-20220601144053-5.png]]
1.2	362
	363	DOWNLINK
	364
1.8	365
41.21	366
55.2	367	[[image:image-20220601143921-4.png]]
1.2	368
	369	DOWNLINK
	370
1.15	371
41.22	372
46.2	373	[[image:image-20220601142805-5.png]]
1.2	374
	375	DOWNLINK
	376
	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
41.2	435	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	436
57.11	437
1.2	438	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.
	439
1.14	440	(((
1.15	441	(((
1.2	442	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	443	)))
1.15	444	)))
1.2	445
42.2	446	[[image:image-20220601142044-1.png]]
1.2	447
30.2	448
57.11	449	(% style="color:blue" %)Example(%%): These two meters are examples of setting parameters and device addresses.
1.2	450
31.2	451	[[image:image-20220527093950-25.png]]
1.2	452
57.4	453
32.2	454	[[image:image-20220527094028-26.png]]
1.2	455
57.12	456
1.14	457	(((
1.16	458	(((
1.2	459	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	460	)))
1.16	461	)))
1.2	462
1.14	463	(((
1.16	464	(((
57.12	465	We can use AT+CFGDEV to set the device address.
1.14	466	)))
1.16	467	)))
1.2	468
1.14	469	(((
1.16	470	(((
1.2	471	We modify the device address 01 of the first energy meter to 02.
1.14	472	)))
1.16	473	)))
1.2	474
43.2	475	[[image:image-20220601142354-2.png]]
1.2	476
57.12	477
35.2	478	(% class="box infomessage" %)
	479	(((
	480	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	481	)))
1.2	482
	483	* 01:device adaress
	484
	485	* 10:function code
	486
	487	* 00 61：Register address
	488
	489	* 00 01：Number of Registers
	490
	491	* 02：Number of bytes
	492
	493	* 00 02：Modified device address
	494
	495	* 1：Check code
	496
	497	The device address setting of the energy meter is complete.
	498
	499	Another energy meter is a single active energy meter with a floating-point format.
	500
	501	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	502
44.2	503	[[image:image-20220601142452-3.png]]
1.2	504
	505
45.2	506	[[image:image-20220601142607-4.png]]
35.2	507
57.12	508
39.5	509	PAYLOAD:01 08 DF 43 62
1.2	510
	511	* 08 DF is the valid value of the meter with device address 02.
	512	* 43 62 is the valid value of the meter with device address 01.
	513
57.12	514
	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
57.13	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/]]
57.12	529
	530
	531
1.2	532	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	533
57.12	534
1.2	535	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:
	536
57.13	537	* 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);"]]
	538	* 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	539
	540
57.12	541
57.14	542	== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
1.2	543
57.13	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-LN to connect to CEM C31 485-T1-MID and send the data for remote minitor. The structure is like below:
	546
57.13	547	* 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	548
57.13	549
	550
57.14	551	== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
1.2	552
57.13	553
38.1	554	[[image:image-20220527094556-31.png]]
1.2	555
	556	Network Structure
	557
57.13	558
1.2	559	* [[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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