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

Version 57.10 by Xiaoling on 2022/07/14 09:35

version	line-number	content
6.2	1	(% class="wikigeneratedid" %)
57.8	2	*
	3	Table of **Contents:
6.2	4
	5	{{toc/}}
	6
41.2	7
	8
	9
	10
	11
41.7	12	= 1. Introduction =
1.1	13
57.6	14
1.2	15	This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
1.1	16
38.2	17
41.7	18	== 1.1 Example 1: Connect to Leak relay and VFD ==
1.1	19
57.6	20
1.2	21	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	22
10.2	23	[[image:image-20220527091852-1.png]]
1.1	24
1.2	25	Connection
1.1	26
1.18	27
1.1	28
10.2	29	[[image:image-20220527091942-2.png]](% style="display:none" %)
	30
1.2	31	Connection
1.1	32
10.2	33
1.2	34	Related documents:
1.1	35
1.2	36	* [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
	37	* [[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.
	38	* [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
1.1	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
57.7	57	* 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	58	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	59
41.7	60	== 1.3 Example3: Use RS485-LN with energy meters ==
1.2	61
41.7	62	=== 1.3.1 OverView ===
1.2	63
57.8	64
1.5	65	(((
57.8	66	(% style="color:red" %)Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	67	)))
1.2	68
1.5	69	(((
1.2	70	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	71	)))
1.2	72
13.2	73	[[image:image-20220527092419-5.png]]
1.2	74
	75	Connection1
	76
13.2	77
41.13	78
1.19	79	(((
57.8	80	How to connect with Energy Meter：
	81
	82
1.19	83	)))
1.2	84
1.19	85	(((
1.2	86	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	87	)))
1.2	88
1.19	89	(((
1.2	90	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	91	)))
1.2	92
1.19	93	(((
1.2	94	Power Source VIN to RS485-LN VIN+
1.19	95	)))
1.2	96
1.19	97	(((
1.2	98	Power Source GND to RS485-LN VIN-
1.19	99	)))
1.2	100
1.19	101	(((
1.2	102	Once there is power, the RS485-LN will be on.
1.19	103	)))
1.2	104
13.2	105	[[image:image-20220527092514-6.png]]
1.2	106
	107	Connection2
	108
	109
41.14	110
20.2	111	[[image:image-20220527092555-7.png]]
1.12	112
1.2	113	Connection3
	114
	115
41.7	116	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	117
57.8	118
1.7	119	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	120
51.2	121	[[image:image-20220601143257-10.png]]
1.2	122
20.2	123
57.8	124	(% style="color:blue" %)Example:(%%) AT+COMMAND1=01 03 00 00 00 01 84 0A
1.2	125
	126	* The first byte : slave address code (=001～247)
	127	* The second byte : read register value function code
	128	* 3rd and 4th bytes: start address of register to be read
	129	* 5th and 6th bytes: Number of registers to read
	130	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	131
1.12	132	(((
57.8	133
	134
	135
1.2	136	How to parse the reading of the return command of the parameter：
	137
57.8	138	(% style="color:blue" %)Example:(%%) RETURN1：01 03 02 08 FD 7E 05
1.8	139	)))
1.2	140
	141	* The first byte ARD: slave address code (=001～254)
	142	* The second byte: Return to read function code
	143	* 3rd byte: total number of bytes
	144	* 4th～5th bytes: register data
	145	* The 6th and 7th bytes: CRC16 checksum
	146	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	147
20.2	148	(% class="wikigeneratedid" %)
	149	(((
	150
57.8	151
	152
	153
20.2	154	)))
	155
41.2	156	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	157
57.8	158
1.2	159	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	160
20.2	161
57.8	162	==== 1.3.3.1 via AT COMMAND ====
1.2	163
	164
57.8	165	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.
	166
1.8	167	(((
1.2	168	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	169	)))
1.2	170
50.2	171	[[image:image-20220601143201-9.png]]
1.2	172
1.12	173	AT COMMAND
1.2	174
20.2	175
1.8	176	(% class="box infomessage" %)
	177	(((
57.8	178	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	179	)))
1.2	180
41.15	181	a: length for the return of AT+COMMAND
1.2	182
41.15	183	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	184
41.15	185	c: define the position for valid value.
1.2	186
50.2	187	[[image:image-20220601143115-8.png]]
1.2	188
	189	AT COMMAND
	190
20.2	191
41.15	192
1.2	193	PAYLOAD is available after the valid value is intercepted.
	194
1.8	195
48.2	196	[[image:image-20220601143046-7.png]]
1.2	197
	198	AT COMMAND
	199
20.2	200
41.16	201
1.2	202	You can get configured PAYLOAD on TTN.
	203
52.2	204	[[image:image-20220601143519-1.png]]
1.8	205
1.12	206	(((
1.2	207	AT COMMAND
1.12	208	)))
1.2	209
1.12	210	(((
1.13	211
	212	)))
	213
	214	(((
57.8	215	(% style="color:blue" %)Example:
39.3	216
57.9	217	CMD1: Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	218	)))
1.2	219
1.12	220	(((
57.8	221	RETURN1: 01 03 02 00 02 39 85 00 00(return data)
1.12	222	)))
1.2	223
1.12	224	(((
57.8	225	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	226
	227
1.12	228	)))
1.2	229
1.12	230	(((
57.8	231	CMD2: Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	232	)))
1.2	233
1.12	234	(((
57.8	235	RETURN2: 01 03 02 08 DC BE 1D(return data)
1.12	236	)))
1.2	237
1.12	238	(((
57.8	239	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	240
	241
1.12	242	)))
1.2	243
1.12	244	(((
57.8	245	CMD3: Read total active energy data with MODBUS command. address: 0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	246	)))
1.2	247
1.12	248	(((
57.9	249	RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
1.12	250	)))
1.2	251
1.12	252	(((
57.8	253	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	254	)))
1.2	255
1.12	256	(((
57.8	257	Payload: 01 00 02 39 85 08 DC 00 00 00 44
1.12	258	)))
1.2	259
47.2	260	[[image:image-20220601142936-6.png]]
1.2	261
	262	AT COMMAND
	263
20.2	264
21.2	265	(% 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	266
41.17	267
53.2	268	[[image:image-20220601143642-2.png]]
1.8	269
1.2	270	AT COMMAND
	271
	272
41.2	273	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	274
57.8	275
21.2	276	[[image:image-20220527093358-15.png]]
1.2	277
1.9	278	(((
1.2	279	DOWNLINK
1.9	280	)))
1.2	281
1.9	282	(((
	283
	284	)))
	285
	286	(((
39.4	287	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	288	)))
1.2	289
1.9	290	(((
4.3	291	(% class="box infomessage" %)
	292	(((
1.2	293	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	294	)))
4.3	295	)))
1.2	296
1.9	297	(((
1.2	298	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	299	)))
1.2	300
1.9	301	(((
1.2	302	Format: AF MM NN LL XX XX XX XX YY
1.9	303	)))
1.2	304
1.9	305	(((
1.2	306	Where:
1.9	307	)))
1.2	308
1.9	309	(((
1.2	310	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	311	)))
1.2	312
1.9	313	(((
1.2	314	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	315	)))
1.2	316
1.9	317	(((
1.2	318	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	319	)))
1.2	320
1.9	321	(((
1.2	322	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	323	)))
1.2	324
1.9	325	(((
1.2	326	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	327	)))
1.2	328
1.9	329	(((
1.2	330	will execute an uplink after got this command.
1.9	331	)))
1.2	332
1.9	333	(((
41.18	334
	335
39.4	336	(% style="color:#4f81bd" %)Example:
1.9	337	)))
1.2	338
1.9	339	(((
39.4	340	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	341	)))
1.2	342
57.2	343	[[image:image-20220601144149-6.png]]
1.2	344
	345	DOWNLINK
	346
1.8	347
41.19	348
54.2	349	[[image:image-20220601143803-3.png]]
1.2	350
	351	DOWNLINK
	352
1.8	353
41.20	354
57.2	355	[[image:image-20220601144053-5.png]]
1.2	356
	357	DOWNLINK
	358
1.8	359
41.21	360
55.2	361	[[image:image-20220601143921-4.png]]
1.2	362
	363	DOWNLINK
	364
1.15	365
41.22	366
46.2	367	[[image:image-20220601142805-5.png]]
1.2	368
	369	DOWNLINK
	370
	371
41.2	372	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	373
1.13	374	(((
1.2	375	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	376	)))
1.2	377
1.13	378	(((
1.2	379	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	380	)))
1.2	381
1.13	382	(((
1.2	383	Open the serial port debugging, set the send and receive to HEX.
1.13	384	)))
1.2	385
1.13	386	(((
1.2	387	Baud rate: 9600
1.13	388	)))
1.2	389
1.13	390	(((
1.2	391	check digit: Even
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.
1.13	408	)))
1.2	409
1.13	410	(((
39.4	411	(% style="color:#4f81bd" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	412	)))
1.2	413
1.13	414	(((
4.6	415	output：01 03 04 00 00 00 42 7A 02
1.13	416	)))
1.2	417
29.2	418	[[image:image-20220527093821-23.png]]
1.2	419
	420	USB
	421
29.2	422
41.2	423	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	424
	425	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.
	426
1.14	427	(((
1.15	428	(((
1.2	429	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	430	)))
1.15	431	)))
1.2	432
42.2	433	[[image:image-20220601142044-1.png]]
1.2	434
30.2	435
1.16	436	Example:These two meters are examples of setting parameters and device addresses.
1.2	437
31.2	438	[[image:image-20220527093950-25.png]]
1.2	439
57.4	440
32.2	441	[[image:image-20220527094028-26.png]]
1.2	442
1.14	443	(((
1.16	444	(((
1.2	445	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	446	)))
1.16	447	)))
1.2	448
1.14	449	(((
1.16	450	(((
1.2	451	We can use AT+CFGDEV to set the device address.
1.14	452	)))
1.16	453	)))
1.2	454
1.14	455	(((
1.16	456	(((
1.2	457	We modify the device address 01 of the first energy meter to 02.
1.14	458	)))
1.16	459	)))
1.2	460
43.2	461	[[image:image-20220601142354-2.png]]
1.2	462
35.2	463	(% class="box infomessage" %)
	464	(((
	465	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	466	)))
1.2	467
	468	* 01:device adaress
	469
	470	* 10:function code
	471
	472	* 00 61：Register address
	473
	474	* 00 01：Number of Registers
	475
	476	* 02：Number of bytes
	477
	478	* 00 02：Modified device address
	479
	480	* 1：Check code
	481
	482	The device address setting of the energy meter is complete.
	483
	484	Another energy meter is a single active energy meter with a floating-point format.
	485
	486	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	487
44.2	488	[[image:image-20220601142452-3.png]]
1.2	489
	490
45.2	491	[[image:image-20220601142607-4.png]]
35.2	492
39.5	493	PAYLOAD:01 08 DF 43 62
1.2	494
	495	* 08 DF is the valid value of the meter with device address 02.
	496	* 43 62 is the valid value of the meter with device address 01.
	497
	498	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	499
	500	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. The structure is like below:
	501
36.2	502	[[image:image-20220527094330-30.png]]
1.2	503
	504	Connection
	505
	506	* [[Circuit Breaker Remote Open Close>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Circuit_Breaker_Remote_Open_Close/]] : Configure Documen
	507
	508	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	509
	510	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:
	511
	512	* [[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]] : Configure Document For RS485-BL
	513
	514	* [[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]] : Configure Document for RS485-LN
	515
	516	== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
	517
	518	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:
	519
	520	* [[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]] : Configure Document For RS485-LN
	521
	522	== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
	523
38.1	524	[[image:image-20220527094556-31.png]]
1.2	525
	526	Network Structure
	527
	528	* [[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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