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

Version 57.23 by Xiaoling on 2022/07/14 10:12

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