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

Version 60.13 by Xiaoling on 2023/04/20 10:19

version	line-number	content
57.14	1	Table of Contents:
6.2	2
	3	{{toc/}}
	4
41.2	5
	6
	7
	8
	9
60.12	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
60.12	16	== 1.1 Example 1: Connect to Leak relay and VFD ==
60.5	17
1.1	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
60.5	21
60.10	22	[[image:image-20220527091852-1.png\|\|height="547" width="994"]]
1.1	23
60.12	24	Connection
1.1	25
1.18	26
1.1	27
10.2	28	[[image:image-20220527091942-2.png]](% style="display:none" %)
	29
60.12	30	Connection
1.1	31
10.2	32
57.15	33	(% style="color:blue" %)Related documents:
1.1	34
60.13	35	* 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);"]]
	36
60.1	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);"]]
60.13	38
1.2	39	* [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
1.1	40
57.20	41
60.2	42
60.12	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
60.10	49	[[image:image-20220527092058-3.png\|\|height="552" width="905"]]
1.1	50
60.12	51	Connection
1.1	52
1.18	53
41.11	54
60.10	55	[[image:image-20220527092146-4.png\|\|height="507" width="906"]]
1.2	56
60.12	57	Connection
1.2	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"]]
60.13	63
1.2	64	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	65
57.15	66
1.2	67
60.12	68	== 1.3 Example 3: Use RS485-LN with energy meters ==
1.2	69
60.12	70	=== 1.3.1 OverView ===
57.8	71
60.12	72
1.5	73	(((
60.4	74	(% style="color:red" %)Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	75	)))
1.2	76
1.5	77	(((
1.2	78	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
60.6	79
	80
1.5	81	)))
1.2	82
13.2	83	[[image:image-20220527092419-5.png]]
1.2	84
60.12	85	Connection1
1.2	86
13.2	87
41.13	88
1.19	89	(((
57.16	90	(% style="color:blue" %)How to connect with Energy Meter：
57.8	91
	92
1.19	93	)))
1.2	94
1.19	95	(((
1.2	96	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	97	)))
1.2	98
1.19	99	(((
1.2	100	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	101	)))
1.2	102
1.19	103	(((
60.13	104	Power Source VIN to RS485-LN VIN+
1.19	105	)))
1.2	106
1.19	107	(((
60.13	108	Power Source GND to RS485-LN VIN-
1.19	109	)))
1.2	110
1.19	111	(((
1.2	112	Once there is power, the RS485-LN will be on.
60.2	113
	114
1.19	115	)))
1.2	116
13.2	117	[[image:image-20220527092514-6.png]]
1.2	118
60.12	119	Connection2
1.2	120
	121
60.2	122
20.2	123	[[image:image-20220527092555-7.png]]
1.12	124
60.12	125	Connection3
1.2	126
	127
60.12	128	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
57.21	129
1.2	130
1.7	131	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	132
51.2	133	[[image:image-20220601143257-10.png]]
1.2	134
20.2	135
57.8	136	(% style="color:blue" %)Example:(%%) AT+COMMAND1=01 03 00 00 00 01 84 0A
1.2	137
	138	* The first byte : slave address code (=001～247)
60.13	139
1.2	140	* The second byte : read register value function code
60.13	141
1.2	142	* 3rd and 4th bytes: start address of register to be read
60.13	143
1.2	144	* 5th and 6th bytes: Number of registers to read
60.13	145
1.2	146	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	147
1.12	148	(((
57.8	149
	150
	151
1.2	152	How to parse the reading of the return command of the parameter：
	153
57.8	154	(% style="color:blue" %)Example:(%%) RETURN1：01 03 02 08 FD 7E 05
1.8	155	)))
1.2	156
	157	* The first byte ARD: slave address code (=001～254)
60.13	158
1.2	159	* The second byte: Return to read function code
60.13	160
1.2	161	* 3rd byte: total number of bytes
60.13	162
1.2	163	* 4th～5th bytes: register data
60.13	164
1.2	165	* The 6th and 7th bytes: CRC16 checksum
60.13	166
1.2	167	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	168
57.8	169
20.2	170
60.12	171	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	172
57.8	173
1.2	174	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	175
20.2	176
60.13	177	==== 1.3.3.1 via AT COMMAND ====
57.21	178
1.2	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
60.12	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
60.12	206	AT COMMAND
1.2	207
20.2	208
41.15	209
1.2	210	PAYLOAD is available after the valid value is intercepted.
	211
48.2	212	[[image:image-20220601143046-7.png]]
1.2	213
60.12	214	AT COMMAND
1.2	215
20.2	216
41.16	217
1.2	218	You can get configured PAYLOAD on TTN.
	219
52.2	220	[[image:image-20220601143519-1.png]]
1.8	221
1.12	222	(((
60.12	223	AT COMMAND
1.12	224	)))
1.2	225
1.12	226	(((
1.13	227
	228	)))
	229
	230	(((
57.8	231	(% style="color:blue" %)Example:
39.3	232
57.18	233	(% style="color:red" %)CMD1:(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	234	)))
1.2	235
1.12	236	(((
57.8	237	RETURN1: 01 03 02 00 02 39 85 00 00(return data)
1.12	238	)))
1.2	239
1.12	240	(((
57.8	241	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	242
	243
1.12	244	)))
1.2	245
1.12	246	(((
57.18	247	(% style="color:red" %)CMD2: (%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	248	)))
1.2	249
1.12	250	(((
57.8	251	RETURN2: 01 03 02 08 DC BE 1D(return data)
1.12	252	)))
1.2	253
1.12	254	(((
57.8	255	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	256
	257
1.12	258	)))
1.2	259
1.12	260	(((
57.18	261	(% 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	262	)))
1.2	263
1.12	264	(((
57.9	265	RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
1.12	266	)))
1.2	267
1.12	268	(((
57.8	269	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	270	)))
1.2	271
1.12	272	(((
57.8	273	Payload: 01 00 02 39 85 08 DC 00 00 00 44
1.12	274	)))
1.2	275
47.2	276	[[image:image-20220601142936-6.png]]
1.2	277
	278	AT COMMAND
	279
20.2	280
60.2	281
60.6	282	(% 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	283
41.17	284
53.2	285	[[image:image-20220601143642-2.png]]
1.8	286
1.2	287	AT COMMAND
	288
	289
57.21	290
60.13	291	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	292
57.8	293
21.2	294	[[image:image-20220527093358-15.png]]
1.2	295
1.9	296	(((
60.12	297	DOWNLINK
1.9	298	)))
1.2	299
1.9	300
60.13	301
1.9	302	(((
60.7	303	(% style="color:blue" %)Type Code 0xAF
1.9	304	)))
1.2	305
1.9	306	(((
4.3	307	(% class="box infomessage" %)
	308	(((
1.2	309	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	310	)))
4.3	311	)))
1.2	312
1.9	313	(((
57.26	314	(% style="color:red" %)Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	315	)))
1.2	316
1.9	317	(((
1.2	318	Format: AF MM NN LL XX XX XX XX YY
1.9	319	)))
1.2	320
1.9	321	(((
1.2	322	Where:
1.9	323	)))
1.2	324
1.9	325	(((
1.2	326	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	327	)))
1.2	328
1.9	329	(((
1.2	330	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	331	)))
1.2	332
1.9	333	(((
1.2	334	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	335	)))
1.2	336
1.9	337	(((
1.2	338	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	339	)))
1.2	340
1.9	341	(((
1.2	342	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	343	)))
1.2	344
1.9	345	(((
1.2	346	will execute an uplink after got this command.
1.9	347	)))
1.2	348
60.13	349
1.9	350	(((
57.11	351	(% style="color:blue" %)Example:
1.9	352	)))
1.2	353
1.9	354	(((
39.4	355	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	356	)))
1.2	357
57.2	358	[[image:image-20220601144149-6.png]]
1.2	359
60.12	360	DOWNLINK
1.2	361
1.8	362
41.19	363
54.2	364	[[image:image-20220601143803-3.png]]
1.2	365
60.12	366	DOWNLINK
1.2	367
1.8	368
41.20	369
57.2	370	[[image:image-20220601144053-5.png]]
1.2	371
60.12	372	DOWNLINK
1.2	373
1.8	374
41.21	375
55.2	376	[[image:image-20220601143921-4.png]]
1.2	377
60.12	378	DOWNLINK
1.2	379
1.15	380
41.22	381
46.2	382	[[image:image-20220601142805-5.png]]
1.2	383
60.12	384	DOWNLINK
1.2	385
57.21	386
60.12	387	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	388
60.2	389
1.13	390	(((
1.2	391	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	392	)))
1.2	393
1.13	394	(((
1.2	395	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	396	)))
1.2	397
1.13	398	(((
1.2	399	Open the serial port debugging, set the send and receive to HEX.
1.13	400	)))
1.2	401
1.13	402	(((
1.2	403	Baud rate: 9600
1.13	404	)))
1.2	405
1.13	406	(((
1.2	407	check digit: Even
57.11	408
	409
1.13	410	)))
1.2	411
27.2	412	[[image:image-20220527093708-21.png]]
1.2	413
60.12	414	USB
1.2	415
1.13	416
41.23	417
29.2	418	[[image:image-20220527093747-22.png]]
1.2	419
60.12	420	USB
1.2	421
1.13	422
41.24	423
1.13	424	(((
1.2	425	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.
1.13	426	)))
1.2	427
1.13	428	(((
57.11	429	(% style="color:blue" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	430	)))
1.2	431
1.13	432	(((
4.6	433	output：01 03 04 00 00 00 42 7A 02
57.11	434
	435
1.13	436	)))
1.2	437
29.2	438	[[image:image-20220527093821-23.png]]
1.2	439
60.12	440	USB
1.2	441
29.2	442
57.21	443
60.12	444	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	445
57.11	446
1.2	447	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.
	448
1.14	449	(((
1.15	450	(((
1.2	451	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	452	)))
1.15	453	)))
1.2	454
42.2	455	[[image:image-20220601142044-1.png]]
1.2	456
30.2	457
57.11	458	(% style="color:blue" %)Example(%%): These two meters are examples of setting parameters and device addresses.
1.2	459
60.8	460
31.2	461	[[image:image-20220527093950-25.png]]
1.2	462
57.4	463
32.2	464	[[image:image-20220527094028-26.png]]
1.2	465
57.12	466
1.14	467	(((
1.16	468	(((
1.2	469	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	470	)))
1.16	471	)))
1.2	472
1.14	473	(((
1.16	474	(((
57.27	475	We can use (% style="color:blue" %)AT+CFGDEV(%%) to set the device address.
1.14	476	)))
1.16	477	)))
1.2	478
1.14	479	(((
1.16	480	(((
1.2	481	We modify the device address 01 of the first energy meter to 02.
1.14	482	)))
1.16	483	)))
1.2	484
43.2	485	[[image:image-20220601142354-2.png]]
1.2	486
57.12	487
35.2	488	(% class="box infomessage" %)
	489	(((
	490	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	491	)))
1.2	492
60.12	493	* 01: device adaress
1.2	494
60.12	495	* 10: function code
1.2	496
	497	* 00 61：Register address
	498
	499	* 00 01：Number of Registers
	500
	501	* 02：Number of bytes
	502
	503	* 00 02：Modified device address
	504
	505	* 1：Check code
	506
	507	The device address setting of the energy meter is complete.
	508
	509	Another energy meter is a single active energy meter with a floating-point format.
	510
	511	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	512
44.2	513	[[image:image-20220601142452-3.png]]
1.2	514
	515
45.2	516	[[image:image-20220601142607-4.png]]
35.2	517
57.12	518
57.21	519	(% style="color:blue" %)PAYLOAD: 01 08 DF 43 62
1.2	520
	521	* 08 DF is the valid value of the meter with device address 02.
	522	* 43 62 is the valid value of the meter with device address 01.
	523
60.10	524	(% style="display:none" %) (%%)
60.8	525
	526
1.2	527	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	528
	529
57.12	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-LN to connect to SCHNEIDER SMART and Monitor and control your cabinet remotely with no wires and with Dragino RS485-LN LoRaWAN technology.
	531
	532	The structure is like below:
	533
36.2	534	[[image:image-20220527094330-30.png]]
1.2	535
60.13	536	Connection
1.2	537
	538
60.1	539	* 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	540
60.9	541
60.12	542
1.2	543	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	544
57.12	545
1.2	546	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:
	547
60.1	548	* 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);"]]
60.13	549
60.1	550	* 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	551
60.9	552
	553
57.14	554	== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
1.2	555
57.13	556
1.2	557	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:
	558
60.1	559	* 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	560
60.9	561
	562
57.14	563	== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
1.2	564
57.13	565
38.1	566	[[image:image-20220527094556-31.png]]
1.2	567
	568	Network Structure
	569
57.13	570
1.2	571	* [[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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