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

Version 57.26 by Xiaoling on 2022/07/14 10:17

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
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
57.25	63
41.7	64	== 1.3 Example3: Use RS485-LN with energy meters ==
1.2	65
57.16	66
41.7	67	=== 1.3.1 OverView ===
1.2	68
57.8	69
1.5	70	(((
57.8	71	(% style="color:red" %)Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	72	)))
1.2	73
1.5	74	(((
1.2	75	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	76	)))
1.2	77
13.2	78	[[image:image-20220527092419-5.png]]
1.2	79
	80	Connection1
	81
13.2	82
41.13	83
1.19	84	(((
57.16	85	(% style="color:blue" %)How to connect with Energy Meter：
57.8	86
	87
1.19	88	)))
1.2	89
1.19	90	(((
1.2	91	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	92	)))
1.2	93
1.19	94	(((
1.2	95	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	96	)))
1.2	97
1.19	98	(((
1.2	99	Power Source VIN to RS485-LN VIN+
1.19	100	)))
1.2	101
1.19	102	(((
1.2	103	Power Source GND to RS485-LN VIN-
1.19	104	)))
1.2	105
1.19	106	(((
1.2	107	Once there is power, the RS485-LN will be on.
1.19	108	)))
1.2	109
13.2	110	[[image:image-20220527092514-6.png]]
1.2	111
	112	Connection2
	113
	114
20.2	115	[[image:image-20220527092555-7.png]]
1.12	116
1.2	117	Connection3
	118
	119
57.21	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
57.21	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
57.18	223	(% style="color:red" %)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	(((
57.18	237	(% style="color:red" %)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	(((
57.18	251	(% 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	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
57.21	279
41.2	280	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	281
57.8	282
21.2	283	[[image:image-20220527093358-15.png]]
1.2	284
1.9	285	(((
1.2	286	DOWNLINK
1.9	287	)))
1.2	288
1.9	289	(((
	290
	291	)))
	292
	293	(((
39.4	294	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	295	)))
1.2	296
1.9	297	(((
4.3	298	(% class="box infomessage" %)
	299	(((
1.2	300	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	301	)))
4.3	302	)))
1.2	303
1.9	304	(((
57.26	305	(% style="color:red" %)Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	306	)))
1.2	307
1.9	308	(((
1.2	309	Format: AF MM NN LL XX XX XX XX YY
1.9	310	)))
1.2	311
1.9	312	(((
1.2	313	Where:
1.9	314	)))
1.2	315
1.9	316	(((
1.2	317	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	318	)))
1.2	319
1.9	320	(((
1.2	321	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	322	)))
1.2	323
1.9	324	(((
1.2	325	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	326	)))
1.2	327
1.9	328	(((
1.2	329	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	330	)))
1.2	331
1.9	332	(((
1.2	333	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	334	)))
1.2	335
1.9	336	(((
1.2	337	will execute an uplink after got this command.
1.9	338	)))
1.2	339
1.9	340	(((
41.18	341
	342
57.11	343	(% style="color:blue" %)Example:
1.9	344	)))
1.2	345
1.9	346	(((
39.4	347	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	348	)))
1.2	349
57.2	350	[[image:image-20220601144149-6.png]]
1.2	351
	352	DOWNLINK
	353
1.8	354
41.19	355
54.2	356	[[image:image-20220601143803-3.png]]
1.2	357
	358	DOWNLINK
	359
1.8	360
41.20	361
57.2	362	[[image:image-20220601144053-5.png]]
1.2	363
	364	DOWNLINK
	365
1.8	366
41.21	367
55.2	368	[[image:image-20220601143921-4.png]]
1.2	369
	370	DOWNLINK
	371
1.15	372
41.22	373
46.2	374	[[image:image-20220601142805-5.png]]
1.2	375
	376	DOWNLINK
	377
	378
57.21	379
41.2	380	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	381
1.13	382	(((
1.2	383	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	384	)))
1.2	385
1.13	386	(((
1.2	387	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	388	)))
1.2	389
1.13	390	(((
1.2	391	Open the serial port debugging, set the send and receive to HEX.
1.13	392	)))
1.2	393
1.13	394	(((
1.2	395	Baud rate: 9600
1.13	396	)))
1.2	397
1.13	398	(((
1.2	399	check digit: Even
57.11	400
	401
1.13	402	)))
1.2	403
27.2	404	[[image:image-20220527093708-21.png]]
1.2	405
	406	USB
	407
1.13	408
41.23	409
29.2	410	[[image:image-20220527093747-22.png]]
1.2	411
	412	USB
	413
1.13	414
41.24	415
1.13	416	(((
1.2	417	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	418
	419
1.13	420	)))
1.2	421
1.13	422	(((
57.11	423	(% style="color:blue" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	424	)))
1.2	425
1.13	426	(((
4.6	427	output：01 03 04 00 00 00 42 7A 02
57.11	428
	429
1.13	430	)))
1.2	431
29.2	432	[[image:image-20220527093821-23.png]]
1.2	433
	434	USB
	435
29.2	436
57.21	437
41.2	438	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	439
57.11	440
1.2	441	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.
	442
1.14	443	(((
1.15	444	(((
1.2	445	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	446	)))
1.15	447	)))
1.2	448
42.2	449	[[image:image-20220601142044-1.png]]
1.2	450
30.2	451
57.11	452	(% style="color:blue" %)Example(%%): These two meters are examples of setting parameters and device addresses.
1.2	453
31.2	454	[[image:image-20220527093950-25.png]]
1.2	455
57.4	456
32.2	457	[[image:image-20220527094028-26.png]]
1.2	458
57.12	459
1.14	460	(((
1.16	461	(((
1.2	462	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	463	)))
1.16	464	)))
1.2	465
1.14	466	(((
1.16	467	(((
57.12	468	We can use AT+CFGDEV to set the device address.
1.14	469	)))
1.16	470	)))
1.2	471
1.14	472	(((
1.16	473	(((
1.2	474	We modify the device address 01 of the first energy meter to 02.
1.14	475	)))
1.16	476	)))
1.2	477
43.2	478	[[image:image-20220601142354-2.png]]
1.2	479
57.12	480
35.2	481	(% class="box infomessage" %)
	482	(((
	483	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	484	)))
1.2	485
	486	* 01:device adaress
	487
	488	* 10:function code
	489
	490	* 00 61：Register address
	491
	492	* 00 01：Number of Registers
	493
	494	* 02：Number of bytes
	495
	496	* 00 02：Modified device address
	497
	498	* 1：Check code
	499
	500	The device address setting of the energy meter is complete.
	501
	502	Another energy meter is a single active energy meter with a floating-point format.
	503
	504	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	505
44.2	506	[[image:image-20220601142452-3.png]]
1.2	507
	508
45.2	509	[[image:image-20220601142607-4.png]]
35.2	510
57.12	511
57.21	512	(% style="color:blue" %)PAYLOAD: 01 08 DF 43 62
1.2	513
	514	* 08 DF is the valid value of the meter with device address 02.
	515	* 43 62 is the valid value of the meter with device address 01.
	516
57.21	517
	518
	519
1.2	520	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	521
	522
57.12	523	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.
	524
	525	The structure is like below:
	526
36.2	527	[[image:image-20220527094330-30.png]]
1.2	528
	529	Connection
	530
	531
57.13	532	* 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	533
57.21	534
	535
	536
1.2	537	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	538
57.12	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-BL to connect to SEM Three Energy Meter and send the data to mobile phone for remote minitor. The structure is like below:
	541
57.13	542	* 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);"]]
	543	* 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	544
57.22	545
	546
	547
57.14	548	== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
1.2	549
57.13	550
1.2	551	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:
	552
57.13	553	* 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	554
57.23	555
	556
	557
57.14	558	== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
1.2	559
57.13	560
38.1	561	[[image:image-20220527094556-31.png]]
1.2	562
	563	Network Structure
	564
57.13	565
1.2	566	* [[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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