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

Version 57.28 by Xiaoling on 2022/07/14 10:20

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
57.28	39
	40
41.7	41	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	42
57.7	43
1.2	44	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	45
57.7	46
10.2	47	[[image:image-20220527092058-3.png]]
1.1	48
1.2	49	Connection
1.1	50
1.18	51
41.11	52
10.2	53	[[image:image-20220527092146-4.png]]
1.2	54
	55	Connection
	56
41.12	57
57.15	58	(% style="color:blue" %)Related documents:
	59
	60	* 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	61	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	62
57.15	63
57.28	64
	65
41.7	66	== 1.3 Example3: Use RS485-LN with energy meters ==
1.2	67
57.16	68
41.7	69	=== 1.3.1 OverView ===
1.2	70
57.8	71
1.5	72	(((
57.8	73	(% style="color:red" %)Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	74	)))
1.2	75
1.5	76	(((
1.2	77	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	78	)))
1.2	79
13.2	80	[[image:image-20220527092419-5.png]]
1.2	81
	82	Connection1
	83
13.2	84
41.13	85
1.19	86	(((
57.16	87	(% style="color:blue" %)How to connect with Energy Meter：
57.8	88
	89
1.19	90	)))
1.2	91
1.19	92	(((
1.2	93	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	94	)))
1.2	95
1.19	96	(((
1.2	97	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	98	)))
1.2	99
1.19	100	(((
1.2	101	Power Source VIN to RS485-LN VIN+
1.19	102	)))
1.2	103
1.19	104	(((
1.2	105	Power Source GND to RS485-LN VIN-
1.19	106	)))
1.2	107
1.19	108	(((
1.2	109	Once there is power, the RS485-LN will be on.
1.19	110	)))
1.2	111
13.2	112	[[image:image-20220527092514-6.png]]
1.2	113
	114	Connection2
	115
	116
20.2	117	[[image:image-20220527092555-7.png]]
1.12	118
1.2	119	Connection3
	120
	121
57.21	122
41.7	123	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	124
57.8	125
1.7	126	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	127
51.2	128	[[image:image-20220601143257-10.png]]
1.2	129
20.2	130
57.8	131	(% style="color:blue" %)Example:(%%) AT+COMMAND1=01 03 00 00 00 01 84 0A
1.2	132
	133	* The first byte : slave address code (=001～247)
	134	* The second byte : read register value function code
	135	* 3rd and 4th bytes: start address of register to be read
	136	* 5th and 6th bytes: Number of registers to read
	137	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	138
1.12	139	(((
57.8	140
	141
	142
1.2	143	How to parse the reading of the return command of the parameter：
	144
57.8	145	(% style="color:blue" %)Example:(%%) RETURN1：01 03 02 08 FD 7E 05
1.8	146	)))
1.2	147
	148	* The first byte ARD: slave address code (=001～254)
	149	* The second byte: Return to read function code
	150	* 3rd byte: total number of bytes
	151	* 4th～5th bytes: register data
	152	* The 6th and 7th bytes: CRC16 checksum
	153	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	154
20.2	155	(% class="wikigeneratedid" %)
	156	(((
	157
57.8	158
	159
	160
20.2	161	)))
	162
41.2	163	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	164
57.8	165
1.2	166	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	167
20.2	168
57.21	169
57.8	170	==== 1.3.3.1 via AT COMMAND ====
1.2	171
	172
57.8	173	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.
	174
1.8	175	(((
1.2	176	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	177	)))
1.2	178
50.2	179	[[image:image-20220601143201-9.png]]
1.2	180
1.12	181	AT COMMAND
1.2	182
20.2	183
1.8	184	(% class="box infomessage" %)
	185	(((
57.8	186	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	187	)))
1.2	188
41.15	189	a: length for the return of AT+COMMAND
1.2	190
41.15	191	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	192
41.15	193	c: define the position for valid value.
1.2	194
50.2	195	[[image:image-20220601143115-8.png]]
1.2	196
	197	AT COMMAND
	198
20.2	199
41.15	200
1.2	201	PAYLOAD is available after the valid value is intercepted.
	202
1.8	203
48.2	204	[[image:image-20220601143046-7.png]]
1.2	205
	206	AT COMMAND
	207
20.2	208
41.16	209
1.2	210	You can get configured PAYLOAD on TTN.
	211
52.2	212	[[image:image-20220601143519-1.png]]
1.8	213
1.12	214	(((
1.2	215	AT COMMAND
1.12	216	)))
1.2	217
1.12	218	(((
1.13	219
	220	)))
	221
	222	(((
57.8	223	(% style="color:blue" %)Example:
39.3	224
57.18	225	(% style="color:red" %)CMD1:(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	226	)))
1.2	227
1.12	228	(((
57.8	229	RETURN1: 01 03 02 00 02 39 85 00 00(return data)
1.12	230	)))
1.2	231
1.12	232	(((
57.8	233	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	234
	235
1.12	236	)))
1.2	237
1.12	238	(((
57.18	239	(% style="color:red" %)CMD2: (%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	240	)))
1.2	241
1.12	242	(((
57.8	243	RETURN2: 01 03 02 08 DC BE 1D(return data)
1.12	244	)))
1.2	245
1.12	246	(((
57.8	247	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	248
	249
1.12	250	)))
1.2	251
1.12	252	(((
57.18	253	(% 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	254	)))
1.2	255
1.12	256	(((
57.9	257	RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
1.12	258	)))
1.2	259
1.12	260	(((
57.8	261	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	262	)))
1.2	263
1.12	264	(((
57.8	265	Payload: 01 00 02 39 85 08 DC 00 00 00 44
1.12	266	)))
1.2	267
47.2	268	[[image:image-20220601142936-6.png]]
1.2	269
	270	AT COMMAND
	271
20.2	272
21.2	273	(% 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	274
41.17	275
53.2	276	[[image:image-20220601143642-2.png]]
1.8	277
1.2	278	AT COMMAND
	279
	280
57.21	281
41.2	282	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	283
57.8	284
21.2	285	[[image:image-20220527093358-15.png]]
1.2	286
1.9	287	(((
1.2	288	DOWNLINK
1.9	289	)))
1.2	290
1.9	291	(((
	292
	293	)))
	294
	295	(((
39.4	296	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	297	)))
1.2	298
1.9	299	(((
4.3	300	(% class="box infomessage" %)
	301	(((
1.2	302	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	303	)))
4.3	304	)))
1.2	305
1.9	306	(((
57.26	307	(% style="color:red" %)Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	308	)))
1.2	309
1.9	310	(((
1.2	311	Format: AF MM NN LL XX XX XX XX YY
1.9	312	)))
1.2	313
1.9	314	(((
1.2	315	Where:
1.9	316	)))
1.2	317
1.9	318	(((
1.2	319	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	320	)))
1.2	321
1.9	322	(((
1.2	323	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	324	)))
1.2	325
1.9	326	(((
1.2	327	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	328	)))
1.2	329
1.9	330	(((
1.2	331	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	332	)))
1.2	333
1.9	334	(((
1.2	335	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	336	)))
1.2	337
1.9	338	(((
1.2	339	will execute an uplink after got this command.
1.9	340	)))
1.2	341
1.9	342	(((
41.18	343
	344
57.11	345	(% style="color:blue" %)Example:
1.9	346	)))
1.2	347
1.9	348	(((
39.4	349	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	350	)))
1.2	351
57.2	352	[[image:image-20220601144149-6.png]]
1.2	353
	354	DOWNLINK
	355
1.8	356
41.19	357
54.2	358	[[image:image-20220601143803-3.png]]
1.2	359
	360	DOWNLINK
	361
1.8	362
41.20	363
57.2	364	[[image:image-20220601144053-5.png]]
1.2	365
	366	DOWNLINK
	367
1.8	368
41.21	369
55.2	370	[[image:image-20220601143921-4.png]]
1.2	371
	372	DOWNLINK
	373
1.15	374
41.22	375
46.2	376	[[image:image-20220601142805-5.png]]
1.2	377
	378	DOWNLINK
	379
	380
57.21	381
41.2	382	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	383
1.13	384	(((
1.2	385	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	386	)))
1.2	387
1.13	388	(((
1.2	389	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	390	)))
1.2	391
1.13	392	(((
1.2	393	Open the serial port debugging, set the send and receive to HEX.
1.13	394	)))
1.2	395
1.13	396	(((
1.2	397	Baud rate: 9600
1.13	398	)))
1.2	399
1.13	400	(((
1.2	401	check digit: Even
57.11	402
	403
1.13	404	)))
1.2	405
27.2	406	[[image:image-20220527093708-21.png]]
1.2	407
	408	USB
	409
1.13	410
41.23	411
29.2	412	[[image:image-20220527093747-22.png]]
1.2	413
	414	USB
	415
1.13	416
41.24	417
1.13	418	(((
1.2	419	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	420
	421
1.13	422	)))
1.2	423
1.13	424	(((
57.11	425	(% style="color:blue" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	426	)))
1.2	427
1.13	428	(((
4.6	429	output：01 03 04 00 00 00 42 7A 02
57.11	430
	431
1.13	432	)))
1.2	433
29.2	434	[[image:image-20220527093821-23.png]]
1.2	435
	436	USB
	437
29.2	438
57.21	439
41.2	440	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	441
57.11	442
1.2	443	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.
	444
1.14	445	(((
1.15	446	(((
1.2	447	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	448	)))
1.15	449	)))
1.2	450
42.2	451	[[image:image-20220601142044-1.png]]
1.2	452
30.2	453
57.11	454	(% style="color:blue" %)Example(%%): These two meters are examples of setting parameters and device addresses.
1.2	455
31.2	456	[[image:image-20220527093950-25.png]]
1.2	457
57.4	458
32.2	459	[[image:image-20220527094028-26.png]]
1.2	460
57.12	461
1.14	462	(((
1.16	463	(((
1.2	464	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	465	)))
1.16	466	)))
1.2	467
1.14	468	(((
1.16	469	(((
57.27	470	We can use (% style="color:blue" %)AT+CFGDEV(%%) to set the device address.
1.14	471	)))
1.16	472	)))
1.2	473
1.14	474	(((
1.16	475	(((
1.2	476	We modify the device address 01 of the first energy meter to 02.
1.14	477	)))
1.16	478	)))
1.2	479
43.2	480	[[image:image-20220601142354-2.png]]
1.2	481
57.12	482
35.2	483	(% class="box infomessage" %)
	484	(((
	485	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	486	)))
1.2	487
	488	* 01:device adaress
	489
	490	* 10:function code
	491
	492	* 00 61：Register address
	493
	494	* 00 01：Number of Registers
	495
	496	* 02：Number of bytes
	497
	498	* 00 02：Modified device address
	499
	500	* 1：Check code
	501
	502	The device address setting of the energy meter is complete.
	503
	504	Another energy meter is a single active energy meter with a floating-point format.
	505
	506	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	507
44.2	508	[[image:image-20220601142452-3.png]]
1.2	509
	510
45.2	511	[[image:image-20220601142607-4.png]]
35.2	512
57.12	513
57.21	514	(% style="color:blue" %)PAYLOAD: 01 08 DF 43 62
1.2	515
	516	* 08 DF is the valid value of the meter with device address 02.
	517	* 43 62 is the valid value of the meter with device address 01.
	518
57.21	519
	520
57.28	521
1.2	522	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	523
	524
57.12	525	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.
	526
	527	The structure is like below:
	528
36.2	529	[[image:image-20220527094330-30.png]]
1.2	530
	531	Connection
	532
	533
57.13	534	* 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	535
57.21	536
	537
57.28	538
1.2	539	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	540
57.12	541
1.2	542	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:
	543
57.13	544	* 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);"]]
	545	* 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	546
57.22	547
	548
57.28	549
57.14	550	== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
1.2	551
57.13	552
1.2	553	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:
	554
57.13	555	* 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	556
57.23	557
	558
57.28	559
57.14	560	== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
1.2	561
57.13	562
38.1	563	[[image:image-20220527094556-31.png]]
1.2	564
	565	Network Structure
	566
57.13	567
1.2	568	* [[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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