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

Version 60.9 by Xiaoling on 2022/09/19 16:15

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
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
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
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
57.15	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
57.15	64
60.2	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	(((
60.4	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.
60.6	78
	79
1.5	80	)))
1.2	81
13.2	82	[[image:image-20220527092419-5.png]]
1.2	83
	84	Connection1
	85
13.2	86
41.13	87
1.19	88	(((
57.16	89	(% style="color:blue" %)How to connect with Energy Meter：
57.8	90
	91
1.19	92	)))
1.2	93
1.19	94	(((
1.2	95	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	96	)))
1.2	97
1.19	98	(((
1.2	99	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	100	)))
1.2	101
1.19	102	(((
1.2	103	Power Source VIN to RS485-LN VIN+
1.19	104	)))
1.2	105
1.19	106	(((
1.2	107	Power Source GND to RS485-LN VIN-
1.19	108	)))
1.2	109
1.19	110	(((
1.2	111	Once there is power, the RS485-LN will be on.
60.2	112
	113
1.19	114	)))
1.2	115
13.2	116	[[image:image-20220527092514-6.png]]
1.2	117
	118	Connection2
	119
	120
60.2	121
20.2	122	[[image:image-20220527092555-7.png]]
1.12	123
1.2	124	Connection3
	125
	126
57.21	127
41.7	128	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	129
57.8	130
1.7	131	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	132
51.2	133	[[image:image-20220601143257-10.png]]
1.2	134
20.2	135
57.8	136	(% style="color:blue" %)Example:(%%) AT+COMMAND1=01 03 00 00 00 01 84 0A
1.2	137
	138	* The first byte : slave address code (=001～247)
	139	* The second byte : read register value function code
	140	* 3rd and 4th bytes: start address of register to be read
	141	* 5th and 6th bytes: Number of registers to read
	142	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	143
1.12	144	(((
57.8	145
	146
	147
1.2	148	How to parse the reading of the return command of the parameter：
	149
57.8	150	(% style="color:blue" %)Example:(%%) RETURN1：01 03 02 08 FD 7E 05
1.8	151	)))
1.2	152
	153	* The first byte ARD: slave address code (=001～254)
	154	* The second byte: Return to read function code
	155	* 3rd byte: total number of bytes
	156	* 4th～5th bytes: register data
	157	* The 6th and 7th bytes: CRC16 checksum
	158	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	159
20.2	160	(% class="wikigeneratedid" %)
	161	(((
	162
57.8	163
	164
	165
20.2	166	)))
	167
41.2	168	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	169
57.8	170
1.2	171	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	172
20.2	173
57.21	174
57.8	175	==== 1.3.3.1 via AT COMMAND ====
1.2	176
	177
57.8	178	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.
	179
1.8	180	(((
1.2	181	If the configured parameters and commands are incorrect, the return value is not obtained.
60.6	182
	183
1.8	184	)))
1.2	185
50.2	186	[[image:image-20220601143201-9.png]]
1.2	187
1.12	188	AT COMMAND
1.2	189
20.2	190
1.8	191	(% class="box infomessage" %)
	192	(((
60.1	193	(% _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	194	)))
1.2	195
41.15	196	a: length for the return of AT+COMMAND
1.2	197
41.15	198	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	199
41.15	200	c: define the position for valid value.
1.2	201
50.2	202	[[image:image-20220601143115-8.png]]
1.2	203
	204	AT COMMAND
	205
20.2	206
41.15	207
1.2	208	PAYLOAD is available after the valid value is intercepted.
	209
1.8	210
48.2	211	[[image:image-20220601143046-7.png]]
1.2	212
	213	AT COMMAND
	214
20.2	215
41.16	216
1.2	217	You can get configured PAYLOAD on TTN.
	218
52.2	219	[[image:image-20220601143519-1.png]]
1.8	220
1.12	221	(((
1.2	222	AT COMMAND
1.12	223	)))
1.2	224
1.12	225	(((
1.13	226
60.2	227
	228
1.13	229	)))
	230
	231	(((
57.8	232	(% style="color:blue" %)Example:
39.3	233
60.6	234
57.18	235	(% style="color:red" %)CMD1:(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	236	)))
1.2	237
1.12	238	(((
57.8	239	RETURN1: 01 03 02 00 02 39 85 00 00(return data)
1.12	240	)))
1.2	241
1.12	242	(((
57.8	243	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	244
	245
1.12	246	)))
1.2	247
1.12	248	(((
57.18	249	(% style="color:red" %)CMD2: (%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	250	)))
1.2	251
1.12	252	(((
57.8	253	RETURN2: 01 03 02 08 DC BE 1D(return data)
1.12	254	)))
1.2	255
1.12	256	(((
57.8	257	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	258
	259
1.12	260	)))
1.2	261
1.12	262	(((
57.18	263	(% 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	264	)))
1.2	265
1.12	266	(((
57.9	267	RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
1.12	268	)))
1.2	269
1.12	270	(((
57.8	271	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	272	)))
1.2	273
1.12	274	(((
57.8	275	Payload: 01 00 02 39 85 08 DC 00 00 00 44
60.6	276
	277
1.12	278	)))
1.2	279
47.2	280	[[image:image-20220601142936-6.png]]
1.2	281
	282	AT COMMAND
	283
20.2	284
60.2	285
60.6	286	(% 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	287
41.17	288
53.2	289	[[image:image-20220601143642-2.png]]
1.8	290
1.2	291	AT COMMAND
	292
	293
57.21	294
41.2	295	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	296
57.8	297
21.2	298	[[image:image-20220527093358-15.png]]
1.2	299
1.9	300	(((
1.2	301	DOWNLINK
1.9	302	)))
1.2	303
1.9	304	(((
	305
	306	)))
	307
	308	(((
60.7	309	(% style="color:blue" %)Type Code 0xAF
1.9	310	)))
1.2	311
1.9	312	(((
4.3	313	(% class="box infomessage" %)
	314	(((
1.2	315	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	316	)))
4.3	317	)))
1.2	318
1.9	319	(((
57.26	320	(% style="color:red" %)Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
60.2	321
	322
1.9	323	)))
1.2	324
1.9	325	(((
1.2	326	Format: AF MM NN LL XX XX XX XX YY
1.9	327	)))
1.2	328
1.9	329	(((
1.2	330	Where:
1.9	331	)))
1.2	332
1.9	333	(((
1.2	334	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	335	)))
1.2	336
1.9	337	(((
1.2	338	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	339	)))
1.2	340
1.9	341	(((
1.2	342	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	343	)))
1.2	344
1.9	345	(((
1.2	346	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	347	)))
1.2	348
1.9	349	(((
1.2	350	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	351	)))
1.2	352
1.9	353	(((
1.2	354	will execute an uplink after got this command.
1.9	355	)))
1.2	356
1.9	357	(((
41.18	358
	359
57.11	360	(% style="color:blue" %)Example:
1.9	361	)))
1.2	362
1.9	363	(((
39.4	364	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	365	)))
1.2	366
57.2	367	[[image:image-20220601144149-6.png]]
1.2	368
	369	DOWNLINK
	370
1.8	371
41.19	372
54.2	373	[[image:image-20220601143803-3.png]]
1.2	374
	375	DOWNLINK
	376
1.8	377
41.20	378
57.2	379	[[image:image-20220601144053-5.png]]
1.2	380
	381	DOWNLINK
	382
1.8	383
41.21	384
55.2	385	[[image:image-20220601143921-4.png]]
1.2	386
	387	DOWNLINK
	388
1.15	389
41.22	390
46.2	391	[[image:image-20220601142805-5.png]]
1.2	392
	393	DOWNLINK
	394
	395
57.21	396
41.2	397	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	398
60.2	399
1.13	400	(((
1.2	401	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	402	)))
1.2	403
1.13	404	(((
1.2	405	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	406	)))
1.2	407
1.13	408	(((
1.2	409	Open the serial port debugging, set the send and receive to HEX.
1.13	410	)))
1.2	411
1.13	412	(((
1.2	413	Baud rate: 9600
1.13	414	)))
1.2	415
1.13	416	(((
1.2	417	check digit: Even
57.11	418
	419
1.13	420	)))
1.2	421
27.2	422	[[image:image-20220527093708-21.png]]
1.2	423
	424	USB
	425
1.13	426
41.23	427
29.2	428	[[image:image-20220527093747-22.png]]
1.2	429
	430	USB
	431
1.13	432
41.24	433
1.13	434	(((
1.2	435	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	436
	437
1.13	438	)))
1.2	439
1.13	440	(((
57.11	441	(% style="color:blue" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	442	)))
1.2	443
1.13	444	(((
4.6	445	output：01 03 04 00 00 00 42 7A 02
57.11	446
	447
1.13	448	)))
1.2	449
29.2	450	[[image:image-20220527093821-23.png]]
1.2	451
	452	USB
	453
29.2	454
57.21	455
41.2	456	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	457
57.11	458
1.2	459	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.
	460
1.14	461	(((
1.15	462	(((
1.2	463	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	464	)))
1.15	465	)))
1.2	466
42.2	467	[[image:image-20220601142044-1.png]]
1.2	468
30.2	469
57.11	470	(% style="color:blue" %)Example(%%): These two meters are examples of setting parameters and device addresses.
1.2	471
60.8	472
31.2	473	[[image:image-20220527093950-25.png]]
1.2	474
57.4	475
32.2	476	[[image:image-20220527094028-26.png]]
1.2	477
57.12	478
1.14	479	(((
1.16	480	(((
1.2	481	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	482	)))
1.16	483	)))
1.2	484
1.14	485	(((
1.16	486	(((
57.27	487	We can use (% style="color:blue" %)AT+CFGDEV(%%) to set the device address.
1.14	488	)))
1.16	489	)))
1.2	490
1.14	491	(((
1.16	492	(((
1.2	493	We modify the device address 01 of the first energy meter to 02.
1.14	494	)))
1.16	495	)))
1.2	496
43.2	497	[[image:image-20220601142354-2.png]]
1.2	498
57.12	499
35.2	500	(% class="box infomessage" %)
	501	(((
	502	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	503	)))
1.2	504
	505	* 01:device adaress
	506
	507	* 10:function code
	508
	509	* 00 61：Register address
	510
	511	* 00 01：Number of Registers
	512
	513	* 02：Number of bytes
	514
	515	* 00 02：Modified device address
	516
	517	* 1：Check code
	518
	519	The device address setting of the energy meter is complete.
	520
	521	Another energy meter is a single active energy meter with a floating-point format.
	522
	523	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	524
44.2	525	[[image:image-20220601142452-3.png]]
1.2	526
	527
45.2	528	[[image:image-20220601142607-4.png]]
35.2	529
57.12	530
57.21	531	(% style="color:blue" %)PAYLOAD: 01 08 DF 43 62
1.2	532
	533	* 08 DF is the valid value of the meter with device address 02.
	534	* 43 62 is the valid value of the meter with device address 01.
	535
60.8	536
	537
	538
1.2	539	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	540
	541
57.12	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-LN to connect to SCHNEIDER SMART and Monitor and control your cabinet remotely with no wires and with Dragino RS485-LN LoRaWAN technology.
	543
	544	The structure is like below:
	545
36.2	546	[[image:image-20220527094330-30.png]]
1.2	547
	548	Connection
	549
	550
60.1	551	* 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	552
60.9	553
	554
	555
1.2	556	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	557
57.12	558
1.2	559	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:
	560
60.1	561	* 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);"]]
	562	* 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	563
60.9	564
	565
	566
57.14	567	== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
1.2	568
57.13	569
1.2	570	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:
	571
60.1	572	* 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	573
60.9	574
	575
	576
57.14	577	== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
1.2	578
57.13	579
38.1	580	[[image:image-20220527094556-31.png]]
1.2	581
	582	Network Structure
	583
57.13	584
1.2	585	* [[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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