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

Version 57.20 by Xiaoling on 2022/07/14 10:10

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
57.20	38
	39
	40
41.7	41	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	42
57.7	43
1.2	44	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	45
57.7	46
10.2	47	[[image:image-20220527092058-3.png]]
1.1	48
1.2	49	Connection
1.1	50
1.18	51
41.11	52
10.2	53	[[image:image-20220527092146-4.png]]
1.2	54
	55	Connection
	56
41.12	57
57.15	58	(% style="color:blue" %)Related documents:
	59
	60	* 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	61	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	62
57.15	63
57.19	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
20.2	116	[[image:image-20220527092555-7.png]]
1.12	117
1.2	118	Connection3
	119
	120
41.7	121	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	122
57.8	123
1.7	124	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	125
51.2	126	[[image:image-20220601143257-10.png]]
1.2	127
20.2	128
57.8	129	(% style="color:blue" %)Example:(%%) AT+COMMAND1=01 03 00 00 00 01 84 0A
1.2	130
	131	* The first byte : slave address code (=001～247)
	132	* The second byte : read register value function code
	133	* 3rd and 4th bytes: start address of register to be read
	134	* 5th and 6th bytes: Number of registers to read
	135	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	136
1.12	137	(((
57.8	138
	139
	140
1.2	141	How to parse the reading of the return command of the parameter：
	142
57.8	143	(% style="color:blue" %)Example:(%%) RETURN1：01 03 02 08 FD 7E 05
1.8	144	)))
1.2	145
	146	* The first byte ARD: slave address code (=001～254)
	147	* The second byte: Return to read function code
	148	* 3rd byte: total number of bytes
	149	* 4th～5th bytes: register data
	150	* The 6th and 7th bytes: CRC16 checksum
	151	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	152
20.2	153	(% class="wikigeneratedid" %)
	154	(((
	155
57.8	156
	157
	158
20.2	159	)))
	160
41.2	161	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	162
57.8	163
1.2	164	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	165
20.2	166
57.8	167	==== 1.3.3.1 via AT COMMAND ====
1.2	168
	169
57.8	170	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.
	171
1.8	172	(((
1.2	173	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	174	)))
1.2	175
50.2	176	[[image:image-20220601143201-9.png]]
1.2	177
1.12	178	AT COMMAND
1.2	179
20.2	180
1.8	181	(% class="box infomessage" %)
	182	(((
57.8	183	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	184	)))
1.2	185
41.15	186	a: length for the return of AT+COMMAND
1.2	187
41.15	188	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	189
41.15	190	c: define the position for valid value.
1.2	191
50.2	192	[[image:image-20220601143115-8.png]]
1.2	193
	194	AT COMMAND
	195
20.2	196
41.15	197
1.2	198	PAYLOAD is available after the valid value is intercepted.
	199
1.8	200
48.2	201	[[image:image-20220601143046-7.png]]
1.2	202
	203	AT COMMAND
	204
20.2	205
41.16	206
1.2	207	You can get configured PAYLOAD on TTN.
	208
52.2	209	[[image:image-20220601143519-1.png]]
1.8	210
1.12	211	(((
1.2	212	AT COMMAND
1.12	213	)))
1.2	214
1.12	215	(((
1.13	216
	217	)))
	218
	219	(((
57.8	220	(% style="color:blue" %)Example:
39.3	221
57.18	222	(% style="color:red" %)CMD1:(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	223	)))
1.2	224
1.12	225	(((
57.8	226	RETURN1: 01 03 02 00 02 39 85 00 00(return data)
1.12	227	)))
1.2	228
1.12	229	(((
57.8	230	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	231
	232
1.12	233	)))
1.2	234
1.12	235	(((
57.18	236	(% style="color:red" %)CMD2: (%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	237	)))
1.2	238
1.12	239	(((
57.8	240	RETURN2: 01 03 02 08 DC BE 1D(return data)
1.12	241	)))
1.2	242
1.12	243	(((
57.8	244	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	245
	246
1.12	247	)))
1.2	248
1.12	249	(((
57.18	250	(% 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	251	)))
1.2	252
1.12	253	(((
57.9	254	RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
1.12	255	)))
1.2	256
1.12	257	(((
57.8	258	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	259	)))
1.2	260
1.12	261	(((
57.8	262	Payload: 01 00 02 39 85 08 DC 00 00 00 44
1.12	263	)))
1.2	264
47.2	265	[[image:image-20220601142936-6.png]]
1.2	266
	267	AT COMMAND
	268
20.2	269
21.2	270	(% 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	271
41.17	272
53.2	273	[[image:image-20220601143642-2.png]]
1.8	274
1.2	275	AT COMMAND
	276
	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	(((
57.11	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
41.2	377	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	378
1.13	379	(((
1.2	380	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	381	)))
1.2	382
1.13	383	(((
1.2	384	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	385	)))
1.2	386
1.13	387	(((
1.2	388	Open the serial port debugging, set the send and receive to HEX.
1.13	389	)))
1.2	390
1.13	391	(((
1.2	392	Baud rate: 9600
1.13	393	)))
1.2	394
1.13	395	(((
1.2	396	check digit: Even
57.11	397
	398
1.13	399	)))
1.2	400
27.2	401	[[image:image-20220527093708-21.png]]
1.2	402
	403	USB
	404
1.13	405
41.23	406
29.2	407	[[image:image-20220527093747-22.png]]
1.2	408
	409	USB
	410
1.13	411
41.24	412
1.13	413	(((
1.2	414	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	415
	416
1.13	417	)))
1.2	418
1.13	419	(((
57.11	420	(% style="color:blue" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	421	)))
1.2	422
1.13	423	(((
4.6	424	output：01 03 04 00 00 00 42 7A 02
57.11	425
	426
1.13	427	)))
1.2	428
29.2	429	[[image:image-20220527093821-23.png]]
1.2	430
	431	USB
	432
29.2	433
41.2	434	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	435
57.11	436
1.2	437	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.
	438
1.14	439	(((
1.15	440	(((
1.2	441	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	442	)))
1.15	443	)))
1.2	444
42.2	445	[[image:image-20220601142044-1.png]]
1.2	446
30.2	447
57.11	448	(% style="color:blue" %)Example(%%): These two meters are examples of setting parameters and device addresses.
1.2	449
31.2	450	[[image:image-20220527093950-25.png]]
1.2	451
57.4	452
32.2	453	[[image:image-20220527094028-26.png]]
1.2	454
57.12	455
1.14	456	(((
1.16	457	(((
1.2	458	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	459	)))
1.16	460	)))
1.2	461
1.14	462	(((
1.16	463	(((
57.12	464	We can use AT+CFGDEV to set the device address.
1.14	465	)))
1.16	466	)))
1.2	467
1.14	468	(((
1.16	469	(((
1.2	470	We modify the device address 01 of the first energy meter to 02.
1.14	471	)))
1.16	472	)))
1.2	473
43.2	474	[[image:image-20220601142354-2.png]]
1.2	475
57.12	476
35.2	477	(% class="box infomessage" %)
	478	(((
	479	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	480	)))
1.2	481
	482	* 01:device adaress
	483
	484	* 10:function code
	485
	486	* 00 61：Register address
	487
	488	* 00 01：Number of Registers
	489
	490	* 02：Number of bytes
	491
	492	* 00 02：Modified device address
	493
	494	* 1：Check code
	495
	496	The device address setting of the energy meter is complete.
	497
	498	Another energy meter is a single active energy meter with a floating-point format.
	499
	500	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	501
44.2	502	[[image:image-20220601142452-3.png]]
1.2	503
	504
45.2	505	[[image:image-20220601142607-4.png]]
35.2	506
57.12	507
39.5	508	PAYLOAD:01 08 DF 43 62
1.2	509
	510	* 08 DF is the valid value of the meter with device address 02.
	511	* 43 62 is the valid value of the meter with device address 01.
	512
	513	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	514
	515
57.12	516	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.
	517
	518	The structure is like below:
	519
36.2	520	[[image:image-20220527094330-30.png]]
1.2	521
	522	Connection
	523
	524
57.13	525	* 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	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
57.14	535	== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
1.2	536
57.13	537
1.2	538	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:
	539
57.13	540	* 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	541
57.14	542	== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
1.2	543
57.13	544
38.1	545	[[image:image-20220527094556-31.png]]
1.2	546
	547	Network Structure
	548
57.13	549
1.2	550	* [[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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