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

Version 57.18 by Xiaoling on 2022/07/14 10:03

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
41.7	38	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	39
57.7	40
1.2	41	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	42
57.7	43
10.2	44	[[image:image-20220527092058-3.png]]
1.1	45
1.2	46	Connection
1.1	47
1.18	48
41.11	49
10.2	50	[[image:image-20220527092146-4.png]]
1.2	51
	52	Connection
	53
41.12	54
57.15	55	(% style="color:blue" %)Related documents:
	56
	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
57.15	60
41.7	61	== 1.3 Example3: Use RS485-LN with energy meters ==
1.2	62
57.16	63
41.7	64	=== 1.3.1 OverView ===
1.2	65
57.8	66
1.5	67	(((
57.8	68	(% style="color:red" %)Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	69	)))
1.2	70
1.5	71	(((
1.2	72	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	73	)))
1.2	74
13.2	75	[[image:image-20220527092419-5.png]]
1.2	76
	77	Connection1
	78
13.2	79
41.13	80
1.19	81	(((
57.16	82	(% style="color:blue" %)How to connect with Energy Meter：
57.8	83
	84
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
20.2	112	[[image:image-20220527092555-7.png]]
1.12	113
1.2	114	Connection3
	115
	116
41.7	117	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	118
57.8	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
57.8	125	(% style="color:blue" %)Example:(%%) AT+COMMAND1=01 03 00 00 00 01 84 0A
1.2	126
	127	* The first byte : slave address code (=001～247)
	128	* The second byte : read register value function code
	129	* 3rd and 4th bytes: start address of register to be read
	130	* 5th and 6th bytes: Number of registers to read
	131	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	132
1.12	133	(((
57.8	134
	135
	136
1.2	137	How to parse the reading of the return command of the parameter：
	138
57.8	139	(% style="color:blue" %)Example:(%%) RETURN1：01 03 02 08 FD 7E 05
1.8	140	)))
1.2	141
	142	* The first byte ARD: slave address code (=001～254)
	143	* The second byte: Return to read function code
	144	* 3rd byte: total number of bytes
	145	* 4th～5th bytes: register data
	146	* The 6th and 7th bytes: CRC16 checksum
	147	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	148
20.2	149	(% class="wikigeneratedid" %)
	150	(((
	151
57.8	152
	153
	154
20.2	155	)))
	156
41.2	157	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	158
57.8	159
1.2	160	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	161
20.2	162
57.8	163	==== 1.3.3.1 via AT COMMAND ====
1.2	164
	165
57.8	166	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.
	167
1.8	168	(((
1.2	169	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	170	)))
1.2	171
50.2	172	[[image:image-20220601143201-9.png]]
1.2	173
1.12	174	AT COMMAND
1.2	175
20.2	176
1.8	177	(% class="box infomessage" %)
	178	(((
57.8	179	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	180	)))
1.2	181
41.15	182	a: length for the return of AT+COMMAND
1.2	183
41.15	184	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	185
41.15	186	c: define the position for valid value.
1.2	187
50.2	188	[[image:image-20220601143115-8.png]]
1.2	189
	190	AT COMMAND
	191
20.2	192
41.15	193
1.2	194	PAYLOAD is available after the valid value is intercepted.
	195
1.8	196
48.2	197	[[image:image-20220601143046-7.png]]
1.2	198
	199	AT COMMAND
	200
20.2	201
41.16	202
1.2	203	You can get configured PAYLOAD on TTN.
	204
52.2	205	[[image:image-20220601143519-1.png]]
1.8	206
1.12	207	(((
1.2	208	AT COMMAND
1.12	209	)))
1.2	210
1.12	211	(((
1.13	212
	213	)))
	214
	215	(((
57.8	216	(% style="color:blue" %)Example:
39.3	217
57.18	218	(% style="color:red" %)CMD1:(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	219	)))
1.2	220
1.12	221	(((
57.8	222	RETURN1: 01 03 02 00 02 39 85 00 00(return data)
1.12	223	)))
1.2	224
1.12	225	(((
57.8	226	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	227
	228
1.12	229	)))
1.2	230
1.12	231	(((
57.18	232	(% style="color:red" %)CMD2: (%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	233	)))
1.2	234
1.12	235	(((
57.8	236	RETURN2: 01 03 02 08 DC BE 1D(return data)
1.12	237	)))
1.2	238
1.12	239	(((
57.8	240	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	241
	242
1.12	243	)))
1.2	244
1.12	245	(((
57.18	246	(% 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	247	)))
1.2	248
1.12	249	(((
57.9	250	RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
1.12	251	)))
1.2	252
1.12	253	(((
57.8	254	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	255	)))
1.2	256
1.12	257	(((
57.8	258	Payload: 01 00 02 39 85 08 DC 00 00 00 44
1.12	259	)))
1.2	260
47.2	261	[[image:image-20220601142936-6.png]]
1.2	262
	263	AT COMMAND
	264
20.2	265
21.2	266	(% 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	267
41.17	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	(((
57.11	299	(% style="color:red" %)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
57.11	337	(% style="color:blue" %)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
57.11	393
	394
1.13	395	)))
1.2	396
27.2	397	[[image:image-20220527093708-21.png]]
1.2	398
	399	USB
	400
1.13	401
41.23	402
29.2	403	[[image:image-20220527093747-22.png]]
1.2	404
	405	USB
	406
1.13	407
41.24	408
1.13	409	(((
1.2	410	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	411
	412
1.13	413	)))
1.2	414
1.13	415	(((
57.11	416	(% style="color:blue" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	417	)))
1.2	418
1.13	419	(((
4.6	420	output：01 03 04 00 00 00 42 7A 02
57.11	421
	422
1.13	423	)))
1.2	424
29.2	425	[[image:image-20220527093821-23.png]]
1.2	426
	427	USB
	428
29.2	429
41.2	430	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	431
57.11	432
1.2	433	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.
	434
1.14	435	(((
1.15	436	(((
1.2	437	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	438	)))
1.15	439	)))
1.2	440
42.2	441	[[image:image-20220601142044-1.png]]
1.2	442
30.2	443
57.11	444	(% style="color:blue" %)Example(%%): These two meters are examples of setting parameters and device addresses.
1.2	445
31.2	446	[[image:image-20220527093950-25.png]]
1.2	447
57.4	448
32.2	449	[[image:image-20220527094028-26.png]]
1.2	450
57.12	451
1.14	452	(((
1.16	453	(((
1.2	454	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	455	)))
1.16	456	)))
1.2	457
1.14	458	(((
1.16	459	(((
57.12	460	We can use AT+CFGDEV to set the device address.
1.14	461	)))
1.16	462	)))
1.2	463
1.14	464	(((
1.16	465	(((
1.2	466	We modify the device address 01 of the first energy meter to 02.
1.14	467	)))
1.16	468	)))
1.2	469
43.2	470	[[image:image-20220601142354-2.png]]
1.2	471
57.12	472
35.2	473	(% class="box infomessage" %)
	474	(((
	475	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	476	)))
1.2	477
	478	* 01:device adaress
	479
	480	* 10:function code
	481
	482	* 00 61：Register address
	483
	484	* 00 01：Number of Registers
	485
	486	* 02：Number of bytes
	487
	488	* 00 02：Modified device address
	489
	490	* 1：Check code
	491
	492	The device address setting of the energy meter is complete.
	493
	494	Another energy meter is a single active energy meter with a floating-point format.
	495
	496	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	497
44.2	498	[[image:image-20220601142452-3.png]]
1.2	499
	500
45.2	501	[[image:image-20220601142607-4.png]]
35.2	502
57.12	503
39.5	504	PAYLOAD:01 08 DF 43 62
1.2	505
	506	* 08 DF is the valid value of the meter with device address 02.
	507	* 43 62 is the valid value of the meter with device address 01.
	508
	509	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	510
	511
57.12	512	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.
	513
	514	The structure is like below:
	515
36.2	516	[[image:image-20220527094330-30.png]]
1.2	517
	518	Connection
	519
	520
57.13	521	* 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	522
1.2	523	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	524
57.12	525
1.2	526	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:
	527
57.13	528	* 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);"]]
	529	* 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	530
57.14	531	== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
1.2	532
57.13	533
1.2	534	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:
	535
57.13	536	* 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	537
57.14	538	== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
1.2	539
57.13	540
38.1	541	[[image:image-20220527094556-31.png]]
1.2	542
	543	Network Structure
	544
57.13	545
1.2	546	* [[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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