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

Version 57.9 by Xiaoling on 2022/07/14 09:34

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
	268
53.2	269	[[image:image-20220601143642-2.png]]
1.8	270
1.2	271	AT COMMAND
	272
	273
41.2	274	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	275
57.8	276
21.2	277	[[image:image-20220527093358-15.png]]
1.2	278
1.9	279	(((
1.2	280	DOWNLINK
1.9	281	)))
1.2	282
1.9	283	(((
	284
	285	)))
	286
	287	(((
39.4	288	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	289	)))
1.2	290
1.9	291	(((
4.3	292	(% class="box infomessage" %)
	293	(((
1.2	294	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	295	)))
4.3	296	)))
1.2	297
1.9	298	(((
1.2	299	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	300	)))
1.2	301
1.9	302	(((
1.2	303	Format: AF MM NN LL XX XX XX XX YY
1.9	304	)))
1.2	305
1.9	306	(((
1.2	307	Where:
1.9	308	)))
1.2	309
1.9	310	(((
1.2	311	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	312	)))
1.2	313
1.9	314	(((
1.2	315	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	316	)))
1.2	317
1.9	318	(((
1.2	319	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	320	)))
1.2	321
1.9	322	(((
1.2	323	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	324	)))
1.2	325
1.9	326	(((
1.2	327	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	328	)))
1.2	329
1.9	330	(((
1.2	331	will execute an uplink after got this command.
1.9	332	)))
1.2	333
1.9	334	(((
41.18	335
	336
39.4	337	(% style="color:#4f81bd" %)Example:
1.9	338	)))
1.2	339
1.9	340	(((
39.4	341	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	342	)))
1.2	343
57.2	344	[[image:image-20220601144149-6.png]]
1.2	345
	346	DOWNLINK
	347
1.8	348
41.19	349
54.2	350	[[image:image-20220601143803-3.png]]
1.2	351
	352	DOWNLINK
	353
1.8	354
41.20	355
57.2	356	[[image:image-20220601144053-5.png]]
1.2	357
	358	DOWNLINK
	359
1.8	360
41.21	361
55.2	362	[[image:image-20220601143921-4.png]]
1.2	363
	364	DOWNLINK
	365
1.15	366
41.22	367
46.2	368	[[image:image-20220601142805-5.png]]
1.2	369
	370	DOWNLINK
	371
	372
41.2	373	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	374
1.13	375	(((
1.2	376	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	377	)))
1.2	378
1.13	379	(((
1.2	380	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	381	)))
1.2	382
1.13	383	(((
1.2	384	Open the serial port debugging, set the send and receive to HEX.
1.13	385	)))
1.2	386
1.13	387	(((
1.2	388	Baud rate: 9600
1.13	389	)))
1.2	390
1.13	391	(((
1.2	392	check digit: Even
1.13	393	)))
1.2	394
27.2	395	[[image:image-20220527093708-21.png]]
1.2	396
	397	USB
	398
1.13	399
41.23	400
29.2	401	[[image:image-20220527093747-22.png]]
1.2	402
	403	USB
	404
1.13	405
41.24	406
1.13	407	(((
1.2	408	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	409	)))
1.2	410
1.13	411	(((
39.4	412	(% style="color:#4f81bd" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	413	)))
1.2	414
1.13	415	(((
4.6	416	output：01 03 04 00 00 00 42 7A 02
1.13	417	)))
1.2	418
29.2	419	[[image:image-20220527093821-23.png]]
1.2	420
	421	USB
	422
29.2	423
41.2	424	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	425
	426	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.
	427
1.14	428	(((
1.15	429	(((
1.2	430	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	431	)))
1.15	432	)))
1.2	433
42.2	434	[[image:image-20220601142044-1.png]]
1.2	435
30.2	436
1.16	437	Example:These two meters are examples of setting parameters and device addresses.
1.2	438
31.2	439	[[image:image-20220527093950-25.png]]
1.2	440
57.4	441
32.2	442	[[image:image-20220527094028-26.png]]
1.2	443
1.14	444	(((
1.16	445	(((
1.2	446	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	447	)))
1.16	448	)))
1.2	449
1.14	450	(((
1.16	451	(((
1.2	452	We can use AT+CFGDEV to set the device address.
1.14	453	)))
1.16	454	)))
1.2	455
1.14	456	(((
1.16	457	(((
1.2	458	We modify the device address 01 of the first energy meter to 02.
1.14	459	)))
1.16	460	)))
1.2	461
43.2	462	[[image:image-20220601142354-2.png]]
1.2	463
35.2	464	(% class="box infomessage" %)
	465	(((
	466	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	467	)))
1.2	468
	469	* 01:device adaress
	470
	471	* 10:function code
	472
	473	* 00 61：Register address
	474
	475	* 00 01：Number of Registers
	476
	477	* 02：Number of bytes
	478
	479	* 00 02：Modified device address
	480
	481	* 1：Check code
	482
	483	The device address setting of the energy meter is complete.
	484
	485	Another energy meter is a single active energy meter with a floating-point format.
	486
	487	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	488
44.2	489	[[image:image-20220601142452-3.png]]
1.2	490
	491
45.2	492	[[image:image-20220601142607-4.png]]
35.2	493
39.5	494	PAYLOAD:01 08 DF 43 62
1.2	495
	496	* 08 DF is the valid value of the meter with device address 02.
	497	* 43 62 is the valid value of the meter with device address 01.
	498
	499	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	500
	501	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:
	502
36.2	503	[[image:image-20220527094330-30.png]]
1.2	504
	505	Connection
	506
	507	* [[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
	508
	509	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	510
	511	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:
	512
	513	* [[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
	514
	515	* [[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
	516
	517	== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
	518
	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 CEM C31 485-T1-MID and send the data for remote minitor. The structure is like below:
	520
	521	* [[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
	522
	523	== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
	524
38.1	525	[[image:image-20220527094556-31.png]]
1.2	526
	527	Network Structure
	528
	529	* [[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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