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

Version 41.13 by Xiaoling on 2022/06/01 14:12

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6.2	1	(% class="wikigeneratedid" %)
	2	Contents:
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	4	{{toc/}}
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41.2	6
	7
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	9
	10
41.7	11	= 1. Introduction =
1.1	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
1.2	18	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	19
10.2	20	[[image:image-20220527091852-1.png]]
1.1	21
1.2	22	Connection
1.1	23
1.18	24
1.1	25
10.2	26	[[image:image-20220527091942-2.png]](% style="display:none" %)
	27
1.2	28	Connection
1.1	29
10.2	30
1.2	31	Related documents:
1.1	32
1.2	33	* [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
	34	* [[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.
	35	* [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
1.1	36
41.6	37
41.10	38
41.7	39	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	40
1.2	41	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	42
10.2	43	[[image:image-20220527092058-3.png]]
1.1	44
1.2	45	Connection
1.1	46
1.18	47
41.11	48
10.2	49	[[image:image-20220527092146-4.png]]
1.2	50
	51	Connection
	52
41.12	53
1.2	54	* [[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
	55	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	56
10.2	57	== ==
	58
41.7	59	== 1.3 Example3: Use RS485-LN with energy meters ==
1.2	60
41.7	61	=== 1.3.1 OverView ===
1.2	62
1.5	63	(((
1.6	64	Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	65	)))
1.2	66
1.5	67	(((
1.2	68	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	69	)))
1.2	70
13.2	71	[[image:image-20220527092419-5.png]]
1.2	72
	73	Connection1
	74
13.2	75
41.13	76
1.19	77	(((
1.2	78	How to connect with Energy Meter：
1.19	79	)))
1.2	80
1.19	81	(((
1.2	82	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	83	)))
1.2	84
1.19	85	(((
1.2	86	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	87	)))
1.2	88
1.19	89	(((
1.2	90	Power Source VIN to RS485-LN VIN+
1.19	91	)))
1.2	92
1.19	93	(((
1.2	94	Power Source GND to RS485-LN VIN-
1.19	95	)))
1.2	96
1.19	97	(((
1.2	98	Once there is power, the RS485-LN will be on.
1.19	99	)))
1.2	100
13.2	101	[[image:image-20220527092514-6.png]]
1.2	102
	103	Connection2
	104
	105
20.2	106	[[image:image-20220527092555-7.png]]
1.12	107
1.2	108	Connection3
	109
	110
41.7	111	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	112
1.7	113	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	114
20.2	115	[[image:image-20220527092629-8.png]]
1.2	116
20.2	117
1.8	118	(% class="box infomessage" %)
	119	(((
20.2	120	Example: AT+COMMAND1=01 03 00 00 00 01 84 0A
1.8	121	)))
1.2	122
	123	* The first byte : slave address code (=001～247)
	124	* The second byte : read register value function code
	125	* 3rd and 4th bytes: start address of register to be read
	126	* 5th and 6th bytes: Number of registers to read
	127	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	128
1.12	129	(((
1.2	130	How to parse the reading of the return command of the parameter：
1.12	131	)))
1.2	132
1.8	133	(% class="box infomessage" %)
	134	(((
20.2	135	Example: RETURN1：01 03 02 08 FD 7E 05
1.8	136	)))
1.2	137
	138	* The first byte ARD: slave address code (=001～254)
	139	* The second byte: Return to read function code
	140	* 3rd byte: total number of bytes
	141	* 4th～5th bytes: register data
	142	* The 6th and 7th bytes: CRC16 checksum
	143	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	144
20.2	145	(% class="wikigeneratedid" %)
	146	(((
	147
	148	)))
	149
41.2	150	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	151
	152	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	153
20.2	154
41.2	155	==== 1.3.3.1 via AT COMMAND: ====
1.2	156
1.8	157	First, we can use AT+CFGDEV to get the return value, and we can also judge whether the input parameters are correct.
1.2	158
1.8	159	(((
1.2	160	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	161	)))
1.2	162
20.2	163	[[image:image-20220527092748-9.png]]
1.2	164
1.12	165	AT COMMAND
1.2	166
20.2	167
1.8	168	(% class="box infomessage" %)
	169	(((
4.2	170	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	171	)))
1.2	172
	173	a: length for the return of AT+COMMAND
	174
	175	b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
	176
	177	c: define the position for valid value.
	178
20.2	179	[[image:image-20220527092936-10.png]]
1.2	180
	181	AT COMMAND
	182
20.2	183
1.2	184	PAYLOAD is available after the valid value is intercepted.
	185
1.8	186
20.2	187	[[image:image-20220527093059-11.png]]
1.2	188
	189	AT COMMAND
	190
20.2	191
1.2	192	You can get configured PAYLOAD on TTN.
	193
20.2	194	[[image:image-20220527093133-12.png]]
1.8	195
1.12	196	(((
1.2	197	AT COMMAND
1.12	198	)))
1.2	199
1.12	200	(((
1.13	201
	202	)))
	203
	204	(((
39.4	205	(% style="color:#4f81bd" %)Example:
39.3	206
	207	CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	208	)))
1.2	209
1.12	210	(((
1.2	211	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	212	)))
1.2	213
1.12	214	(((
1.2	215	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	216
	217
1.12	218	)))
1.2	219
1.12	220	(((
1.2	221	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	222	)))
1.2	223
1.12	224	(((
1.2	225	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	226	)))
1.2	227
1.12	228	(((
1.2	229	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	230
	231
1.12	232	)))
1.2	233
1.12	234	(((
1.2	235	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	236	)))
1.2	237
1.12	238	(((
1.2	239	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	240	)))
1.2	241
1.12	242	(((
1.2	243	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	244	)))
1.2	245
1.12	246	(((
1.2	247	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	248	)))
1.2	249
20.2	250	[[image:image-20220527093204-13.png]]
1.2	251
	252	AT COMMAND
	253
20.2	254
21.2	255	(% 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	256
20.2	257	[[image:image-20220527093251-14.png]]
1.8	258
1.2	259	AT COMMAND
	260
	261
41.2	262	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	263
21.2	264	[[image:image-20220527093358-15.png]]
1.2	265
1.9	266	(((
1.2	267	DOWNLINK
1.9	268	)))
1.2	269
1.9	270	(((
	271
	272	)))
	273
	274	(((
39.4	275	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	276	)))
1.2	277
1.9	278	(((
4.3	279	(% class="box infomessage" %)
	280	(((
1.2	281	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	282	)))
4.3	283	)))
1.2	284
1.9	285	(((
1.2	286	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	287	)))
1.2	288
1.9	289	(((
1.2	290	Format: AF MM NN LL XX XX XX XX YY
1.9	291	)))
1.2	292
1.9	293	(((
1.2	294	Where:
1.9	295	)))
1.2	296
1.9	297	(((
1.2	298	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	299	)))
1.2	300
1.9	301	(((
1.2	302	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	303	)))
1.2	304
1.9	305	(((
1.2	306	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	307	)))
1.2	308
1.9	309	(((
1.2	310	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	311	)))
1.2	312
1.9	313	(((
1.2	314	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	315	)))
1.2	316
1.9	317	(((
1.2	318	will execute an uplink after got this command.
1.9	319	)))
1.2	320
1.9	321	(((
39.4	322	(% style="color:#4f81bd" %)Example:
1.9	323	)))
1.2	324
1.9	325	(((
39.4	326	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	327	)))
1.2	328
22.2	329	[[image:image-20220527093430-16.png]]
1.2	330
	331	DOWNLINK
	332
1.8	333
24.2	334	[[image:image-20220527093508-17.png]]
1.2	335
	336	DOWNLINK
	337
1.8	338
24.2	339	[[image:image-20220527093530-18.png]]
1.2	340
	341	DOWNLINK
	342
1.8	343
26.2	344	[[image:image-20220527093607-19.png]]
1.2	345
	346	DOWNLINK
	347
1.15	348
26.2	349	[[image:image-20220527093628-20.png]]
1.2	350
	351	DOWNLINK
	352
	353
41.2	354	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	355
1.13	356	(((
1.2	357	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	358	)))
1.2	359
1.13	360	(((
1.2	361	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	362	)))
1.2	363
1.13	364	(((
1.2	365	Open the serial port debugging, set the send and receive to HEX.
1.13	366	)))
1.2	367
1.13	368	(((
1.2	369	Baud rate: 9600
1.13	370	)))
1.2	371
1.13	372	(((
1.2	373	check digit: Even
1.13	374	)))
1.2	375
27.2	376	[[image:image-20220527093708-21.png]]
1.2	377
	378	USB
	379
1.13	380
29.2	381	[[image:image-20220527093747-22.png]]
1.2	382
	383	USB
	384
1.13	385
	386	(((
1.2	387	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	388	)))
1.2	389
1.13	390	(((
39.4	391	(% style="color:#4f81bd" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	392	)))
1.2	393
1.13	394	(((
4.6	395	output：01 03 04 00 00 00 42 7A 02
1.13	396	)))
1.2	397
29.2	398	[[image:image-20220527093821-23.png]]
1.2	399
	400	USB
	401
29.2	402
41.2	403	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	404
	405	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.
	406
1.14	407	(((
1.15	408	(((
1.2	409	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	410	)))
1.15	411	)))
1.2	412
30.2	413	[[image:image-20220527093849-24.png]]
1.2	414
30.2	415
1.16	416	Example:These two meters are examples of setting parameters and device addresses.
1.2	417
31.2	418	[[image:image-20220527093950-25.png]]
1.2	419
32.2	420	[[image:image-20220527094028-26.png]]
1.2	421
1.14	422	(((
1.16	423	(((
1.2	424	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	425	)))
1.16	426	)))
1.2	427
1.14	428	(((
1.16	429	(((
1.2	430	We can use AT+CFGDEV to set the device address.
1.14	431	)))
1.16	432	)))
1.2	433
1.14	434	(((
1.16	435	(((
1.2	436	We modify the device address 01 of the first energy meter to 02.
1.14	437	)))
1.16	438	)))
1.2	439
35.2	440	[[image:image-20220527094100-27.png]]
1.2	441
35.2	442	(% class="box infomessage" %)
	443	(((
	444	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	445	)))
1.2	446
	447	* 01:device adaress
	448
	449	* 10:function code
	450
	451	* 00 61：Register address
	452
	453	* 00 01：Number of Registers
	454
	455	* 02：Number of bytes
	456
	457	* 00 02：Modified device address
	458
	459	* 1：Check code
	460
	461	The device address setting of the energy meter is complete.
	462
	463	Another energy meter is a single active energy meter with a floating-point format.
	464
	465	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	466
35.2	467	[[image:image-20220527094150-28.png]]
1.2	468
	469
35.2	470	[[image:image-20220527094224-29.png]]
	471
39.5	472	PAYLOAD:01 08 DF 43 62
1.2	473
	474	* 08 DF is the valid value of the meter with device address 02.
	475	* 43 62 is the valid value of the meter with device address 01.
	476
39.5	477
1.2	478	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	479
	480	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:
	481
36.2	482	[[image:image-20220527094330-30.png]]
1.2	483
	484	Connection
	485
	486	* [[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
	487
41.9	488
1.2	489	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	490
	491	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:
	492
	493	* [[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
	494
	495	* [[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
	496
	497	== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
	498
	499	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:
	500
	501	* [[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
	502
	503	== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
	504
38.1	505	[[image:image-20220527094556-31.png]]
1.2	506
	507	Network Structure
	508
	509	* [[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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