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

Version 57.6 by Xiaoling on 2022/07/14 09:16

version	line-number	content
6.2	1	(% class="wikigeneratedid" %)
57.6	2	Table of Contents:
6.2	3
	4	{{toc/}}
	5
41.2	6
	7
	8
	9
	10
41.7	11	= 1. Introduction =
1.1	12
57.6	13
1.2	14	This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
1.1	15
38.2	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
10.2	22	[[image:image-20220527091852-1.png]]
1.1	23
1.2	24	Connection
1.1	25
1.18	26
1.1	27
10.2	28	[[image:image-20220527091942-2.png]](% style="display:none" %)
	29
1.2	30	Connection
1.1	31
10.2	32
1.2	33	Related documents:
1.1	34
1.2	35	* [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
	36	* [[Configure Manual>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : Explanation on how to integrate to Node-red and to the Mobile Phone, and with link to the Github code.
	37	* [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
1.1	38
41.6	39
57.5	40
57.6	41
41.7	42	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	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
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
1.2	57	* [[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/]] : Configure Document
	58	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	59
10.2	60	== ==
	61
41.7	62	== 1.3 Example3: Use RS485-LN with energy meters ==
1.2	63
41.7	64	=== 1.3.1 OverView ===
1.2	65
1.5	66	(((
1.6	67	Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	68	)))
1.2	69
1.5	70	(((
1.2	71	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	72	)))
1.2	73
13.2	74	[[image:image-20220527092419-5.png]]
1.2	75
	76	Connection1
	77
13.2	78
41.13	79
1.19	80	(((
1.2	81	How to connect with Energy Meter：
1.19	82	)))
1.2	83
1.19	84	(((
1.2	85	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	86	)))
1.2	87
1.19	88	(((
1.2	89	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	90	)))
1.2	91
1.19	92	(((
1.2	93	Power Source VIN to RS485-LN VIN+
1.19	94	)))
1.2	95
1.19	96	(((
1.2	97	Power Source GND to RS485-LN VIN-
1.19	98	)))
1.2	99
1.19	100	(((
1.2	101	Once there is power, the RS485-LN will be on.
1.19	102	)))
1.2	103
13.2	104	[[image:image-20220527092514-6.png]]
1.2	105
	106	Connection2
	107
	108
41.14	109
20.2	110	[[image:image-20220527092555-7.png]]
1.12	111
1.2	112	Connection3
	113
	114
41.7	115	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	116
1.7	117	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	118
51.2	119	[[image:image-20220601143257-10.png]]
1.2	120
20.2	121
1.8	122	(% class="box infomessage" %)
	123	(((
20.2	124	Example: AT+COMMAND1=01 03 00 00 00 01 84 0A
1.8	125	)))
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	(((
1.2	134	How to parse the reading of the return command of the parameter：
1.12	135	)))
1.2	136
1.8	137	(% class="box infomessage" %)
	138	(((
20.2	139	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
	152	)))
	153
41.2	154	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	155
	156	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	157
20.2	158
41.2	159	==== 1.3.3.1 via AT COMMAND: ====
1.2	160
1.8	161	First, we can use AT+CFGDEV to get the return value, and we can also judge whether the input parameters are correct.
1.2	162
1.8	163	(((
1.2	164	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	165	)))
1.2	166
50.2	167	[[image:image-20220601143201-9.png]]
1.2	168
1.12	169	AT COMMAND
1.2	170
20.2	171
1.8	172	(% class="box infomessage" %)
	173	(((
4.2	174	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	175	)))
1.2	176
41.15	177	a: length for the return of AT+COMMAND
1.2	178
41.15	179	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	180
41.15	181	c: define the position for valid value.
1.2	182
50.2	183	[[image:image-20220601143115-8.png]]
1.2	184
	185	AT COMMAND
	186
20.2	187
41.15	188
1.2	189	PAYLOAD is available after the valid value is intercepted.
	190
1.8	191
48.2	192	[[image:image-20220601143046-7.png]]
1.2	193
	194	AT COMMAND
	195
20.2	196
41.16	197
1.2	198	You can get configured PAYLOAD on TTN.
	199
52.2	200	[[image:image-20220601143519-1.png]]
1.8	201
1.12	202	(((
1.2	203	AT COMMAND
1.12	204	)))
1.2	205
1.12	206	(((
1.13	207
	208	)))
	209
	210	(((
39.4	211	(% style="color:#4f81bd" %)Example:
39.3	212
	213	CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	214	)))
1.2	215
1.12	216	(((
1.2	217	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	218	)))
1.2	219
1.12	220	(((
1.2	221	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	222
	223
1.12	224	)))
1.2	225
1.12	226	(((
1.2	227	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	228	)))
1.2	229
1.12	230	(((
1.2	231	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	232	)))
1.2	233
1.12	234	(((
1.2	235	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	236
	237
1.12	238	)))
1.2	239
1.12	240	(((
1.2	241	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	242	)))
1.2	243
1.12	244	(((
1.2	245	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	246	)))
1.2	247
1.12	248	(((
1.2	249	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	250	)))
1.2	251
1.12	252	(((
1.2	253	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	254	)))
1.2	255
47.2	256	[[image:image-20220601142936-6.png]]
1.2	257
	258	AT COMMAND
	259
20.2	260
21.2	261	(% 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	262
41.17	263
	264
53.2	265	[[image:image-20220601143642-2.png]]
1.8	266
1.2	267	AT COMMAND
	268
	269
41.2	270	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	271
21.2	272	[[image:image-20220527093358-15.png]]
1.2	273
1.9	274	(((
1.2	275	DOWNLINK
1.9	276	)))
1.2	277
1.9	278	(((
	279
	280	)))
	281
	282	(((
39.4	283	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	284	)))
1.2	285
1.9	286	(((
4.3	287	(% class="box infomessage" %)
	288	(((
1.2	289	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	290	)))
4.3	291	)))
1.2	292
1.9	293	(((
1.2	294	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	295	)))
1.2	296
1.9	297	(((
1.2	298	Format: AF MM NN LL XX XX XX XX YY
1.9	299	)))
1.2	300
1.9	301	(((
1.2	302	Where:
1.9	303	)))
1.2	304
1.9	305	(((
1.2	306	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	307	)))
1.2	308
1.9	309	(((
1.2	310	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	311	)))
1.2	312
1.9	313	(((
1.2	314	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	315	)))
1.2	316
1.9	317	(((
1.2	318	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	319	)))
1.2	320
1.9	321	(((
1.2	322	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	323	)))
1.2	324
1.9	325	(((
1.2	326	will execute an uplink after got this command.
1.9	327	)))
1.2	328
1.9	329	(((
41.18	330
	331
39.4	332	(% style="color:#4f81bd" %)Example:
1.9	333	)))
1.2	334
1.9	335	(((
39.4	336	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	337	)))
1.2	338
57.2	339	[[image:image-20220601144149-6.png]]
1.2	340
	341	DOWNLINK
	342
1.8	343
41.19	344
54.2	345	[[image:image-20220601143803-3.png]]
1.2	346
	347	DOWNLINK
	348
1.8	349
41.20	350
57.2	351	[[image:image-20220601144053-5.png]]
1.2	352
	353	DOWNLINK
	354
1.8	355
41.21	356
55.2	357	[[image:image-20220601143921-4.png]]
1.2	358
	359	DOWNLINK
	360
1.15	361
41.22	362
46.2	363	[[image:image-20220601142805-5.png]]
1.2	364
	365	DOWNLINK
	366
	367
41.2	368	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	369
1.13	370	(((
1.2	371	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	372	)))
1.2	373
1.13	374	(((
1.2	375	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	376	)))
1.2	377
1.13	378	(((
1.2	379	Open the serial port debugging, set the send and receive to HEX.
1.13	380	)))
1.2	381
1.13	382	(((
1.2	383	Baud rate: 9600
1.13	384	)))
1.2	385
1.13	386	(((
1.2	387	check digit: Even
1.13	388	)))
1.2	389
27.2	390	[[image:image-20220527093708-21.png]]
1.2	391
	392	USB
	393
1.13	394
41.23	395
29.2	396	[[image:image-20220527093747-22.png]]
1.2	397
	398	USB
	399
1.13	400
41.24	401
1.13	402	(((
1.2	403	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.
1.13	404	)))
1.2	405
1.13	406	(((
39.4	407	(% style="color:#4f81bd" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	408	)))
1.2	409
1.13	410	(((
4.6	411	output：01 03 04 00 00 00 42 7A 02
1.13	412	)))
1.2	413
29.2	414	[[image:image-20220527093821-23.png]]
1.2	415
	416	USB
	417
29.2	418
41.2	419	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	420
	421	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.
	422
1.14	423	(((
1.15	424	(((
1.2	425	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	426	)))
1.15	427	)))
1.2	428
42.2	429	[[image:image-20220601142044-1.png]]
1.2	430
30.2	431
1.16	432	Example:These two meters are examples of setting parameters and device addresses.
1.2	433
31.2	434	[[image:image-20220527093950-25.png]]
1.2	435
57.4	436
32.2	437	[[image:image-20220527094028-26.png]]
1.2	438
1.14	439	(((
1.16	440	(((
1.2	441	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	442	)))
1.16	443	)))
1.2	444
1.14	445	(((
1.16	446	(((
1.2	447	We can use AT+CFGDEV to set the device address.
1.14	448	)))
1.16	449	)))
1.2	450
1.14	451	(((
1.16	452	(((
1.2	453	We modify the device address 01 of the first energy meter to 02.
1.14	454	)))
1.16	455	)))
1.2	456
43.2	457	[[image:image-20220601142354-2.png]]
1.2	458
35.2	459	(% class="box infomessage" %)
	460	(((
	461	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	462	)))
1.2	463
	464	* 01:device adaress
	465
	466	* 10:function code
	467
	468	* 00 61：Register address
	469
	470	* 00 01：Number of Registers
	471
	472	* 02：Number of bytes
	473
	474	* 00 02：Modified device address
	475
	476	* 1：Check code
	477
	478	The device address setting of the energy meter is complete.
	479
	480	Another energy meter is a single active energy meter with a floating-point format.
	481
	482	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	483
44.2	484	[[image:image-20220601142452-3.png]]
1.2	485
	486
45.2	487	[[image:image-20220601142607-4.png]]
35.2	488
39.5	489	PAYLOAD:01 08 DF 43 62
1.2	490
	491	* 08 DF is the valid value of the meter with device address 02.
	492	* 43 62 is the valid value of the meter with device address 01.
	493
57.3	494
1.2	495	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	496
	497	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. The structure is like below:
	498
36.2	499	[[image:image-20220527094330-30.png]]
1.2	500
	501	Connection
	502
	503	* [[Circuit Breaker Remote Open Close>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Circuit_Breaker_Remote_Open_Close/]] : Configure Documen
	504
	505	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	506
	507	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:
	508
	509	* [[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]] : Configure Document For RS485-BL
	510
	511	* [[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]] : Configure Document for RS485-LN
	512
	513	== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
	514
	515	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:
	516
	517	* [[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]] : Configure Document For RS485-LN
	518
	519	== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
	520
38.1	521	[[image:image-20220527094556-31.png]]
1.2	522
	523	Network Structure
	524
	525	* [[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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