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

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