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

Version 60.11 by Xiaoling on 2022/12/14 14:13

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
60.5	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
60.5	22
60.10	23	[[image:image-20220527091852-1.png\|\|height="547" width="994"]]
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
57.15	34	(% style="color:blue" %)Related documents:
1.1	35
60.1	36	* System Structure: [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/\|\|_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
	37	* 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/\|\|_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
1.2	38	* [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
1.1	39
57.20	40
60.2	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
60.10	48	[[image:image-20220527092058-3.png\|\|height="552" width="905"]]
1.1	49
1.2	50	Connection
1.1	51
1.18	52
41.11	53
60.10	54	[[image:image-20220527092146-4.png\|\|height="507" width="906"]]
1.2	55
	56	Connection
	57
41.12	58
57.15	59	(% style="color:blue" %)Related documents:
	60
60.1	61	* 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/\|\|_mstmutation="1"]]
1.2	62	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	63
60.11	64	== 1.3 Example 3: Use RS485-LN with energy meters ==
57.15	65
1.2	66
41.7	67	=== 1.3.1 OverView ===
1.2	68
57.8	69
1.5	70	(((
60.4	71	(% style="color:red" %)Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	72	)))
1.2	73
1.5	74	(((
1.2	75	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
60.6	76
	77
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.
60.2	110
	111
1.19	112	)))
1.2	113
13.2	114	[[image:image-20220527092514-6.png]]
1.2	115
	116	Connection2
	117
	118
60.2	119
20.2	120	[[image:image-20220527092555-7.png]]
1.12	121
1.2	122	Connection3
	123
	124
57.21	125
41.7	126	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	127
57.8	128
1.7	129	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	130
51.2	131	[[image:image-20220601143257-10.png]]
1.2	132
20.2	133
57.8	134	(% style="color:blue" %)Example:(%%) AT+COMMAND1=01 03 00 00 00 01 84 0A
1.2	135
	136	* The first byte : slave address code (=001～247)
	137	* The second byte : read register value function code
	138	* 3rd and 4th bytes: start address of register to be read
	139	* 5th and 6th bytes: Number of registers to read
	140	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	141
1.12	142	(((
57.8	143
	144
	145
1.2	146	How to parse the reading of the return command of the parameter：
	147
57.8	148	(% style="color:blue" %)Example:(%%) RETURN1：01 03 02 08 FD 7E 05
1.8	149	)))
1.2	150
	151	* The first byte ARD: slave address code (=001～254)
	152	* The second byte: Return to read function code
	153	* 3rd byte: total number of bytes
	154	* 4th～5th bytes: register data
	155	* The 6th and 7th bytes: CRC16 checksum
	156	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	157
20.2	158	(% class="wikigeneratedid" %)
	159	(((
	160
57.8	161
	162
	163
20.2	164	)))
	165
41.2	166	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	167
57.8	168
1.2	169	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	170
20.2	171
57.21	172
57.8	173	==== 1.3.3.1 via AT COMMAND ====
1.2	174
	175
57.8	176	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.
	177
1.8	178	(((
1.2	179	If the configured parameters and commands are incorrect, the return value is not obtained.
60.6	180
	181
1.8	182	)))
1.2	183
50.2	184	[[image:image-20220601143201-9.png]]
1.2	185
1.12	186	AT COMMAND
1.2	187
20.2	188
1.8	189	(% class="box infomessage" %)
	190	(((
60.1	191	(% _mstmutation="1" %)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	192	)))
1.2	193
41.15	194	a: length for the return of AT+COMMAND
1.2	195
41.15	196	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	197
41.15	198	c: define the position for valid value.
1.2	199
50.2	200	[[image:image-20220601143115-8.png]]
1.2	201
	202	AT COMMAND
	203
20.2	204
41.15	205
1.2	206	PAYLOAD is available after the valid value is intercepted.
	207
1.8	208
48.2	209	[[image:image-20220601143046-7.png]]
1.2	210
	211	AT COMMAND
	212
20.2	213
41.16	214
1.2	215	You can get configured PAYLOAD on TTN.
	216
52.2	217	[[image:image-20220601143519-1.png]]
1.8	218
1.12	219	(((
1.2	220	AT COMMAND
1.12	221	)))
1.2	222
1.12	223	(((
1.13	224
60.2	225
	226
1.13	227	)))
	228
	229	(((
57.8	230	(% style="color:blue" %)Example:
39.3	231
60.6	232
57.18	233	(% style="color:red" %)CMD1:(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	234	)))
1.2	235
1.12	236	(((
57.8	237	RETURN1: 01 03 02 00 02 39 85 00 00(return data)
1.12	238	)))
1.2	239
1.12	240	(((
57.8	241	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	242
	243
1.12	244	)))
1.2	245
1.12	246	(((
57.18	247	(% style="color:red" %)CMD2: (%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	248	)))
1.2	249
1.12	250	(((
57.8	251	RETURN2: 01 03 02 08 DC BE 1D(return data)
1.12	252	)))
1.2	253
1.12	254	(((
57.8	255	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	256
	257
1.12	258	)))
1.2	259
1.12	260	(((
57.18	261	(% 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	262	)))
1.2	263
1.12	264	(((
57.9	265	RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
1.12	266	)))
1.2	267
1.12	268	(((
57.8	269	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	270	)))
1.2	271
1.12	272	(((
57.8	273	Payload: 01 00 02 39 85 08 DC 00 00 00 44
60.6	274
	275
1.12	276	)))
1.2	277
47.2	278	[[image:image-20220601142936-6.png]]
1.2	279
	280	AT COMMAND
	281
20.2	282
60.2	283
60.6	284	(% style="color:blue" %)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	285
41.17	286
53.2	287	[[image:image-20220601143642-2.png]]
1.8	288
1.2	289	AT COMMAND
	290
	291
57.21	292
41.2	293	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	294
57.8	295
21.2	296	[[image:image-20220527093358-15.png]]
1.2	297
1.9	298	(((
1.2	299	DOWNLINK
1.9	300	)))
1.2	301
1.9	302	(((
	303
	304	)))
	305
	306	(((
60.7	307	(% style="color:blue" %)Type Code 0xAF
1.9	308	)))
1.2	309
1.9	310	(((
4.3	311	(% class="box infomessage" %)
	312	(((
1.2	313	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	314	)))
4.3	315	)))
1.2	316
1.9	317	(((
57.26	318	(% style="color:red" %)Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
60.2	319
	320
1.9	321	)))
1.2	322
1.9	323	(((
1.2	324	Format: AF MM NN LL XX XX XX XX YY
1.9	325	)))
1.2	326
1.9	327	(((
1.2	328	Where:
1.9	329	)))
1.2	330
1.9	331	(((
1.2	332	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	333	)))
1.2	334
1.9	335	(((
1.2	336	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	337	)))
1.2	338
1.9	339	(((
1.2	340	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	341	)))
1.2	342
1.9	343	(((
1.2	344	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	345	)))
1.2	346
1.9	347	(((
1.2	348	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	349	)))
1.2	350
1.9	351	(((
1.2	352	will execute an uplink after got this command.
1.9	353	)))
1.2	354
1.9	355	(((
41.18	356
	357
57.11	358	(% style="color:blue" %)Example:
1.9	359	)))
1.2	360
1.9	361	(((
39.4	362	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	363	)))
1.2	364
57.2	365	[[image:image-20220601144149-6.png]]
1.2	366
	367	DOWNLINK
	368
1.8	369
41.19	370
54.2	371	[[image:image-20220601143803-3.png]]
1.2	372
	373	DOWNLINK
	374
1.8	375
41.20	376
57.2	377	[[image:image-20220601144053-5.png]]
1.2	378
	379	DOWNLINK
	380
1.8	381
41.21	382
55.2	383	[[image:image-20220601143921-4.png]]
1.2	384
	385	DOWNLINK
	386
1.15	387
41.22	388
46.2	389	[[image:image-20220601142805-5.png]]
1.2	390
	391	DOWNLINK
	392
	393
57.21	394
41.2	395	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	396
60.2	397
1.13	398	(((
1.2	399	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	400	)))
1.2	401
1.13	402	(((
1.2	403	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	404	)))
1.2	405
1.13	406	(((
1.2	407	Open the serial port debugging, set the send and receive to HEX.
1.13	408	)))
1.2	409
1.13	410	(((
1.2	411	Baud rate: 9600
1.13	412	)))
1.2	413
1.13	414	(((
1.2	415	check digit: Even
57.11	416
	417
1.13	418	)))
1.2	419
27.2	420	[[image:image-20220527093708-21.png]]
1.2	421
	422	USB
	423
1.13	424
41.23	425
29.2	426	[[image:image-20220527093747-22.png]]
1.2	427
	428	USB
	429
1.13	430
41.24	431
1.13	432	(((
1.2	433	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	434
	435
1.13	436	)))
1.2	437
1.13	438	(((
57.11	439	(% style="color:blue" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	440	)))
1.2	441
1.13	442	(((
4.6	443	output：01 03 04 00 00 00 42 7A 02
57.11	444
	445
1.13	446	)))
1.2	447
29.2	448	[[image:image-20220527093821-23.png]]
1.2	449
	450	USB
	451
29.2	452
57.21	453
41.2	454	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	455
57.11	456
1.2	457	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.
	458
1.14	459	(((
1.15	460	(((
1.2	461	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	462	)))
1.15	463	)))
1.2	464
42.2	465	[[image:image-20220601142044-1.png]]
1.2	466
30.2	467
57.11	468	(% style="color:blue" %)Example(%%): These two meters are examples of setting parameters and device addresses.
1.2	469
60.8	470
31.2	471	[[image:image-20220527093950-25.png]]
1.2	472
57.4	473
32.2	474	[[image:image-20220527094028-26.png]]
1.2	475
57.12	476
1.14	477	(((
1.16	478	(((
1.2	479	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	480	)))
1.16	481	)))
1.2	482
1.14	483	(((
1.16	484	(((
57.27	485	We can use (% style="color:blue" %)AT+CFGDEV(%%) to set the device address.
1.14	486	)))
1.16	487	)))
1.2	488
1.14	489	(((
1.16	490	(((
1.2	491	We modify the device address 01 of the first energy meter to 02.
1.14	492	)))
1.16	493	)))
1.2	494
43.2	495	[[image:image-20220601142354-2.png]]
1.2	496
57.12	497
35.2	498	(% class="box infomessage" %)
	499	(((
	500	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	501	)))
1.2	502
	503	* 01:device adaress
	504
	505	* 10:function code
	506
	507	* 00 61：Register address
	508
	509	* 00 01：Number of Registers
	510
	511	* 02：Number of bytes
	512
	513	* 00 02：Modified device address
	514
	515	* 1：Check code
	516
	517	The device address setting of the energy meter is complete.
	518
	519	Another energy meter is a single active energy meter with a floating-point format.
	520
	521	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	522
44.2	523	[[image:image-20220601142452-3.png]]
1.2	524
	525
45.2	526	[[image:image-20220601142607-4.png]]
35.2	527
57.12	528
57.21	529	(% style="color:blue" %)PAYLOAD: 01 08 DF 43 62
1.2	530
	531	* 08 DF is the valid value of the meter with device address 02.
	532	* 43 62 is the valid value of the meter with device address 01.
	533
60.10	534	(% style="display:none" %) (%%)
60.8	535
60.10	536	(% style="display:none" %) (%%)
60.8	537
1.2	538	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	539
	540
57.12	541	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.
	542
	543	The structure is like below:
	544
36.2	545	[[image:image-20220527094330-30.png]]
1.2	546
	547	Connection
	548
	549
60.1	550	* 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/\|\|_mstmutation="1"]]
57.12	551
60.9	552
1.2	553	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	554
57.12	555
1.2	556	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:
	557
60.1	558	* 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\|\|_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
	559	* 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\|\|_mstmutation="1"]]
1.2	560
60.9	561
	562
57.14	563	== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
1.2	564
57.13	565
1.2	566	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:
	567
60.1	568	* 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\|\|_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
1.2	569
60.9	570
	571
57.14	572	== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
1.2	573
57.13	574
38.1	575	[[image:image-20220527094556-31.png]]
1.2	576
	577	Network Structure
	578
57.13	579
1.2	580	* [[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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