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

Version 57.7 by Xiaoling on 2022/07/14 09:20

version	line-number	content
6.2	1	(% class="wikigeneratedid" %)
57.6	2	Table of Contents:
6.2	3
	4	{{toc/}}
	5
41.2	6
	7
	8
	9
	10
41.7	11	= 1. Introduction =
1.1	12
57.6	13
1.2	14	This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
1.1	15
38.2	16
41.7	17	== 1.1 Example 1: Connect to Leak relay and VFD ==
1.1	18
57.6	19
1.2	20	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	21
10.2	22	[[image:image-20220527091852-1.png]]
1.1	23
1.2	24	Connection
1.1	25
1.18	26
1.1	27
10.2	28	[[image:image-20220527091942-2.png]](% style="display:none" %)
	29
1.2	30	Connection
1.1	31
10.2	32
1.2	33	Related documents:
1.1	34
1.2	35	* [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
	36	* [[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.
	37	* [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
1.1	38
41.6	39
57.5	40
57.6	41
41.7	42	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	43
57.7	44
1.2	45	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	46
57.7	47
10.2	48	[[image:image-20220527092058-3.png]]
1.1	49
1.2	50	Connection
1.1	51
1.18	52
41.11	53
10.2	54	[[image:image-20220527092146-4.png]]
1.2	55
	56	Connection
	57
41.12	58
57.7	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
10.2	62
57.7	63
	64
41.7	65	== 1.3 Example3: Use RS485-LN with energy meters ==
1.2	66
41.7	67	=== 1.3.1 OverView ===
1.2	68
1.5	69	(((
1.6	70	Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	71	)))
1.2	72
1.5	73	(((
1.2	74	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	75	)))
1.2	76
13.2	77	[[image:image-20220527092419-5.png]]
1.2	78
	79	Connection1
	80
13.2	81
41.13	82
1.19	83	(((
1.2	84	How to connect with Energy Meter：
1.19	85	)))
1.2	86
1.19	87	(((
1.2	88	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	89	)))
1.2	90
1.19	91	(((
1.2	92	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	93	)))
1.2	94
1.19	95	(((
1.2	96	Power Source VIN to RS485-LN VIN+
1.19	97	)))
1.2	98
1.19	99	(((
1.2	100	Power Source GND to RS485-LN VIN-
1.19	101	)))
1.2	102
1.19	103	(((
1.2	104	Once there is power, the RS485-LN will be on.
1.19	105	)))
1.2	106
13.2	107	[[image:image-20220527092514-6.png]]
1.2	108
	109	Connection2
	110
	111
41.14	112
20.2	113	[[image:image-20220527092555-7.png]]
1.12	114
1.2	115	Connection3
	116
	117
41.7	118	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	119
1.7	120	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	121
51.2	122	[[image:image-20220601143257-10.png]]
1.2	123
20.2	124
1.8	125	(% class="box infomessage" %)
	126	(((
20.2	127	Example: AT+COMMAND1=01 03 00 00 00 01 84 0A
1.8	128	)))
1.2	129
	130	* The first byte : slave address code (=001～247)
	131	* The second byte : read register value function code
	132	* 3rd and 4th bytes: start address of register to be read
	133	* 5th and 6th bytes: Number of registers to read
	134	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	135
1.12	136	(((
1.2	137	How to parse the reading of the return command of the parameter：
1.12	138	)))
1.2	139
1.8	140	(% class="box infomessage" %)
	141	(((
20.2	142	Example: RETURN1：01 03 02 08 FD 7E 05
1.8	143	)))
1.2	144
	145	* The first byte ARD: slave address code (=001～254)
	146	* The second byte: Return to read function code
	147	* 3rd byte: total number of bytes
	148	* 4th～5th bytes: register data
	149	* The 6th and 7th bytes: CRC16 checksum
	150	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	151
20.2	152	(% class="wikigeneratedid" %)
	153	(((
	154
	155	)))
	156
41.2	157	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	158
	159	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	160
20.2	161
41.2	162	==== 1.3.3.1 via AT COMMAND: ====
1.2	163
1.8	164	First, we can use AT+CFGDEV to get the return value, and we can also judge whether the input parameters are correct.
1.2	165
1.8	166	(((
1.2	167	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	168	)))
1.2	169
50.2	170	[[image:image-20220601143201-9.png]]
1.2	171
1.12	172	AT COMMAND
1.2	173
20.2	174
1.8	175	(% class="box infomessage" %)
	176	(((
4.2	177	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	178	)))
1.2	179
41.15	180	a: length for the return of AT+COMMAND
1.2	181
41.15	182	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	183
41.15	184	c: define the position for valid value.
1.2	185
50.2	186	[[image:image-20220601143115-8.png]]
1.2	187
	188	AT COMMAND
	189
20.2	190
41.15	191
1.2	192	PAYLOAD is available after the valid value is intercepted.
	193
1.8	194
48.2	195	[[image:image-20220601143046-7.png]]
1.2	196
	197	AT COMMAND
	198
20.2	199
41.16	200
1.2	201	You can get configured PAYLOAD on TTN.
	202
52.2	203	[[image:image-20220601143519-1.png]]
1.8	204
1.12	205	(((
1.2	206	AT COMMAND
1.12	207	)))
1.2	208
1.12	209	(((
1.13	210
	211	)))
	212
	213	(((
39.4	214	(% style="color:#4f81bd" %)Example:
39.3	215
	216	CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	217	)))
1.2	218
1.12	219	(((
1.2	220	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	221	)))
1.2	222
1.12	223	(((
1.2	224	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	225
	226
1.12	227	)))
1.2	228
1.12	229	(((
1.2	230	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	231	)))
1.2	232
1.12	233	(((
1.2	234	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	235	)))
1.2	236
1.12	237	(((
1.2	238	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	239
	240
1.12	241	)))
1.2	242
1.12	243	(((
1.2	244	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	245	)))
1.2	246
1.12	247	(((
1.2	248	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	249	)))
1.2	250
1.12	251	(((
1.2	252	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	253	)))
1.2	254
1.12	255	(((
1.2	256	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	257	)))
1.2	258
47.2	259	[[image:image-20220601142936-6.png]]
1.2	260
	261	AT COMMAND
	262
20.2	263
21.2	264	(% 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	265
41.17	266
	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
21.2	275	[[image:image-20220527093358-15.png]]
1.2	276
1.9	277	(((
1.2	278	DOWNLINK
1.9	279	)))
1.2	280
1.9	281	(((
	282
	283	)))
	284
	285	(((
39.4	286	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	287	)))
1.2	288
1.9	289	(((
4.3	290	(% class="box infomessage" %)
	291	(((
1.2	292	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	293	)))
4.3	294	)))
1.2	295
1.9	296	(((
1.2	297	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	298	)))
1.2	299
1.9	300	(((
1.2	301	Format: AF MM NN LL XX XX XX XX YY
1.9	302	)))
1.2	303
1.9	304	(((
1.2	305	Where:
1.9	306	)))
1.2	307
1.9	308	(((
1.2	309	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	310	)))
1.2	311
1.9	312	(((
1.2	313	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	314	)))
1.2	315
1.9	316	(((
1.2	317	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	318	)))
1.2	319
1.9	320	(((
1.2	321	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	322	)))
1.2	323
1.9	324	(((
1.2	325	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	326	)))
1.2	327
1.9	328	(((
1.2	329	will execute an uplink after got this command.
1.9	330	)))
1.2	331
1.9	332	(((
41.18	333
	334
39.4	335	(% style="color:#4f81bd" %)Example:
1.9	336	)))
1.2	337
1.9	338	(((
39.4	339	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	340	)))
1.2	341
57.2	342	[[image:image-20220601144149-6.png]]
1.2	343
	344	DOWNLINK
	345
1.8	346
41.19	347
54.2	348	[[image:image-20220601143803-3.png]]
1.2	349
	350	DOWNLINK
	351
1.8	352
41.20	353
57.2	354	[[image:image-20220601144053-5.png]]
1.2	355
	356	DOWNLINK
	357
1.8	358
41.21	359
55.2	360	[[image:image-20220601143921-4.png]]
1.2	361
	362	DOWNLINK
	363
1.15	364
41.22	365
46.2	366	[[image:image-20220601142805-5.png]]
1.2	367
	368	DOWNLINK
	369
	370
41.2	371	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	372
1.13	373	(((
1.2	374	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	375	)))
1.2	376
1.13	377	(((
1.2	378	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	379	)))
1.2	380
1.13	381	(((
1.2	382	Open the serial port debugging, set the send and receive to HEX.
1.13	383	)))
1.2	384
1.13	385	(((
1.2	386	Baud rate: 9600
1.13	387	)))
1.2	388
1.13	389	(((
1.2	390	check digit: Even
1.13	391	)))
1.2	392
27.2	393	[[image:image-20220527093708-21.png]]
1.2	394
	395	USB
	396
1.13	397
41.23	398
29.2	399	[[image:image-20220527093747-22.png]]
1.2	400
	401	USB
	402
1.13	403
41.24	404
1.13	405	(((
1.2	406	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	407	)))
1.2	408
1.13	409	(((
39.4	410	(% style="color:#4f81bd" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	411	)))
1.2	412
1.13	413	(((
4.6	414	output：01 03 04 00 00 00 42 7A 02
1.13	415	)))
1.2	416
29.2	417	[[image:image-20220527093821-23.png]]
1.2	418
	419	USB
	420
29.2	421
41.2	422	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	423
	424	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.
	425
1.14	426	(((
1.15	427	(((
1.2	428	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	429	)))
1.15	430	)))
1.2	431
42.2	432	[[image:image-20220601142044-1.png]]
1.2	433
30.2	434
1.16	435	Example:These two meters are examples of setting parameters and device addresses.
1.2	436
31.2	437	[[image:image-20220527093950-25.png]]
1.2	438
57.4	439
32.2	440	[[image:image-20220527094028-26.png]]
1.2	441
1.14	442	(((
1.16	443	(((
1.2	444	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	445	)))
1.16	446	)))
1.2	447
1.14	448	(((
1.16	449	(((
1.2	450	We can use AT+CFGDEV to set the device address.
1.14	451	)))
1.16	452	)))
1.2	453
1.14	454	(((
1.16	455	(((
1.2	456	We modify the device address 01 of the first energy meter to 02.
1.14	457	)))
1.16	458	)))
1.2	459
43.2	460	[[image:image-20220601142354-2.png]]
1.2	461
35.2	462	(% class="box infomessage" %)
	463	(((
	464	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	465	)))
1.2	466
	467	* 01:device adaress
	468
	469	* 10:function code
	470
	471	* 00 61：Register address
	472
	473	* 00 01：Number of Registers
	474
	475	* 02：Number of bytes
	476
	477	* 00 02：Modified device address
	478
	479	* 1：Check code
	480
	481	The device address setting of the energy meter is complete.
	482
	483	Another energy meter is a single active energy meter with a floating-point format.
	484
	485	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	486
44.2	487	[[image:image-20220601142452-3.png]]
1.2	488
	489
45.2	490	[[image:image-20220601142607-4.png]]
35.2	491
39.5	492	PAYLOAD:01 08 DF 43 62
1.2	493
	494	* 08 DF is the valid value of the meter with device address 02.
	495	* 43 62 is the valid value of the meter with device address 01.
	496
57.3	497
1.2	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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