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

Version 20.2 by Xiaoling on 2022/05/27 09:32

version	line-number	content
6.2	1	(% class="wikigeneratedid" %)
	2	Contents:
	3
	4	{{toc/}}
	5
1.2	6	= 1. Introduction =
1.1	7
1.2	8	This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
1.1	9
1.2	10	== 1.1 Example 1: Connect to Leak relay and VFD ==
1.1	11
1.2	12	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	13
10.2	14	[[image:image-20220527091852-1.png]]
1.1	15
1.2	16	Connection
1.1	17
1.18	18
1.1	19
10.2	20	[[image:image-20220527091942-2.png]](% style="display:none" %)
	21
1.2	22	Connection
1.1	23
10.2	24
1.2	25	Related documents:
1.1	26
1.2	27	* [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
	28	* [[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.
	29	* [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
1.1	30
10.2	31
1.2	32	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	33
1.2	34	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	35
10.2	36	[[image:image-20220527092058-3.png]]
1.1	37
1.2	38	Connection
1.1	39
1.18	40
10.2	41	[[image:image-20220527092146-4.png]]
1.2	42
	43	Connection
	44
	45	* [[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
	46	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	47
10.2	48	(% class="wikigeneratedid" %)
	49	== ==
	50
1.2	51	== 1.3 Example3: Use RS485-LN with energy meters ==
	52
	53	=== 1.3.1 OverView ===
	54
1.5	55	(((
1.6	56	Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	57	)))
1.2	58
1.5	59	(((
1.2	60	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	61	)))
1.2	62
13.2	63	[[image:image-20220527092419-5.png]]
1.2	64
	65	Connection1
	66
13.2	67
1.19	68	(((
1.2	69	How to connect with Energy Meter：
1.19	70	)))
1.2	71
1.19	72	(((
1.2	73	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	74	)))
1.2	75
1.19	76	(((
1.2	77	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	78	)))
1.2	79
1.19	80	(((
1.2	81	Power Source VIN to RS485-LN VIN+
1.19	82	)))
1.2	83
1.19	84	(((
1.2	85	Power Source GND to RS485-LN VIN-
1.19	86	)))
1.2	87
1.19	88	(((
1.2	89	Once there is power, the RS485-LN will be on.
1.19	90	)))
1.2	91
13.2	92	[[image:image-20220527092514-6.png]]
1.2	93
	94	Connection2
	95
	96
20.2	97	[[image:image-20220527092555-7.png]]
1.12	98
1.2	99	Connection3
	100
	101
	102	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
	103
1.7	104	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	105
20.2	106	[[image:image-20220527092629-8.png]]
1.2	107
20.2	108
1.8	109	(% class="box infomessage" %)
	110	(((
20.2	111	Example: AT+COMMAND1=01 03 00 00 00 01 84 0A
1.8	112	)))
1.2	113
	114	* The first byte : slave address code (=001～247)
	115	* The second byte : read register value function code
	116	* 3rd and 4th bytes: start address of register to be read
	117	* 5th and 6th bytes: Number of registers to read
	118	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	119
1.12	120	(((
1.2	121	How to parse the reading of the return command of the parameter：
1.12	122	)))
1.2	123
1.8	124	(% class="box infomessage" %)
	125	(((
20.2	126	Example: RETURN1：01 03 02 08 FD 7E 05
1.8	127	)))
1.2	128
	129	* The first byte ARD: slave address code (=001～254)
	130	* The second byte: Return to read function code
	131	* 3rd byte: total number of bytes
	132	* 4th～5th bytes: register data
	133	* The 6th and 7th bytes: CRC16 checksum
	134	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	135
20.2	136	(% class="wikigeneratedid" %)
	137	(((
	138
	139	)))
	140
1.2	141	=== 1.3.3 How to configure RS485-LN and parse output commands ===
	142
	143	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	144
20.2	145
1.8	146	==== 1.3.3.1 via AT COMMAND: ====
1.2	147
1.8	148	First, we can use AT+CFGDEV to get the return value, and we can also judge whether the input parameters are correct.
1.2	149
1.8	150	(((
1.2	151	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	152	)))
1.2	153
20.2	154	[[image:image-20220527092748-9.png]]
1.2	155
1.12	156	AT COMMAND
1.2	157
20.2	158
1.8	159	(% class="box infomessage" %)
	160	(((
4.2	161	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	162	)))
1.2	163
	164	a: length for the return of AT+COMMAND
	165
	166	b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
	167
	168	c: define the position for valid value.
	169
20.2	170	[[image:image-20220527092936-10.png]]
1.2	171
	172	AT COMMAND
	173
20.2	174
1.2	175	PAYLOAD is available after the valid value is intercepted.
	176
1.8	177
20.2	178	[[image:image-20220527093059-11.png]]
1.2	179
	180	AT COMMAND
	181
20.2	182
1.2	183	You can get configured PAYLOAD on TTN.
	184
20.2	185	[[image:image-20220527093133-12.png]]
1.8	186
1.12	187	(((
1.2	188	AT COMMAND
1.12	189	)))
1.2	190
1.12	191	(((
1.13	192
	193	)))
	194
	195	(((
1.8	196	Example: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	197	)))
1.2	198
1.12	199	(((
1.2	200	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	201	)))
1.2	202
1.12	203	(((
1.2	204	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.
1.12	205	)))
1.2	206
1.12	207	(((
1.2	208	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	209	)))
1.2	210
1.12	211	(((
1.2	212	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	213	)))
1.2	214
1.12	215	(((
1.2	216	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.
1.12	217	)))
1.2	218
1.12	219	(((
1.2	220	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	221	)))
1.2	222
1.12	223	(((
1.2	224	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	225	)))
1.2	226
1.12	227	(((
1.2	228	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	229	)))
1.2	230
1.12	231	(((
1.2	232	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	233	)))
1.2	234
20.2	235	[[image:image-20220527093204-13.png]]
1.2	236
	237	AT COMMAND
	238
20.2	239
1.2	240	01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.
	241
20.2	242	[[image:image-20220527093251-14.png]]
1.8	243
1.2	244	AT COMMAND
	245
	246
1.8	247	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
	248
4.2	249	[[image:image-20220512104358-3.png]]
1.2	250
1.9	251	(((
1.2	252	DOWNLINK
1.9	253	)))
1.2	254
1.9	255	(((
	256
	257	)))
	258
	259	(((
4.3	260	Type Code 0xAF
1.9	261	)))
1.2	262
1.9	263	(((
4.3	264	(% class="box infomessage" %)
	265	(((
1.2	266	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	267	)))
4.3	268	)))
1.2	269
1.9	270	(((
1.2	271	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	272	)))
1.2	273
1.9	274	(((
1.2	275	Format: AF MM NN LL XX XX XX XX YY
1.9	276	)))
1.2	277
1.9	278	(((
1.2	279	Where:
1.9	280	)))
1.2	281
1.9	282	(((
1.2	283	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	284	)))
1.2	285
1.9	286	(((
1.2	287	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	288	)))
1.2	289
1.9	290	(((
1.2	291	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	292	)))
1.2	293
1.9	294	(((
1.2	295	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	296	)))
1.2	297
1.9	298	(((
1.2	299	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	300	)))
1.2	301
1.9	302	(((
1.2	303	will execute an uplink after got this command.
1.9	304	)))
1.2	305
1.9	306	(((
1.2	307	Example:
1.9	308	)))
1.2	309
1.9	310	(((
1.2	311	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	312	)))
1.2	313
	314	[[image:https://wiki.dragino.com/images/thumb/4/45/DOWNLINK_METER2.png/600px-DOWNLINK_METER2.png\|\|height="208" width="600"]]
	315
	316	DOWNLINK
	317
1.8	318
1.2	319	[[~[~[image:https://wiki.dragino.com/images/thumb/2/20/DOWNLINK_METER3.png/600px-DOWNLINK_METER3.png~\|~\|height="105" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:DOWNLINK_METER3.png]]
	320
	321	DOWNLINK
	322
1.8	323
1.2	324	[[image:https://wiki.dragino.com/images/thumb/2/27/DOWNLINK_METER4.png/600px-DOWNLINK_METER4.png\|\|height="210" width="600"]]
	325
	326	DOWNLINK
	327
1.8	328
1.2	329	[[~[~[image:https://wiki.dragino.com/images/thumb/3/39/DOWNLINK_METER5.png/600px-DOWNLINK_METER5.png~\|~\|height="176" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:DOWNLINK_METER5.png]]
	330
	331	DOWNLINK
	332
1.15	333
1.2	334	[[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png\|\|height="365" width="600"]]
	335
	336	DOWNLINK
	337
	338
	339	=== 1.3.4 How to configure and output commands for RS485 to USB ===
	340
1.13	341	(((
1.2	342	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	343	)))
1.2	344
1.13	345	(((
1.2	346	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	347	)))
1.2	348
1.13	349	(((
1.2	350	Open the serial port debugging, set the send and receive to HEX.
1.13	351	)))
1.2	352
1.13	353	(((
1.2	354	Baud rate: 9600
1.13	355	)))
1.2	356
1.13	357	(((
1.2	358	check digit: Even
1.13	359	)))
1.2	360
1.15	361	[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg\|\|height="725" width="544"]]
1.2	362
	363	USB
	364
1.13	365
1.15	366	[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg\|\|height="728" width="546"]]
1.2	367
	368	USB
	369
1.13	370
	371	(((
1.2	372	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	373	)))
1.2	374
1.13	375	(((
	376	Example: input：01 03 00 31 00 02 95 c4
	377	)))
1.2	378
1.13	379	(((
4.6	380	output：01 03 04 00 00 00 42 7A 02
1.13	381	)))
1.2	382
	383	[[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg\|\|height="466" width="600"]]
	384
	385	USB
	386
	387	=== 1.3.5 How to configure multiple devices and modify device addresses ===
	388
	389	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.
	390
1.14	391	(((
1.15	392	(((
1.2	393	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	394	)))
1.15	395	)))
1.2	396
	397	[[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png\|\|alt="Double meter3.png" height="83" width="600"]]
	398
1.16	399	Example:These two meters are examples of setting parameters and device addresses.
1.2	400
1.16	401	[[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg\|\|alt="Double meter1.jpg" height="737" width="553"]]
1.2	402
1.14	403	[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg\|\|alt="Double meter2.jpg" height="733" width="550"]]
1.2	404
1.14	405	(((
1.16	406	(((
1.2	407	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	408	)))
1.16	409	)))
1.2	410
1.14	411	(((
1.16	412	(((
1.2	413	We can use AT+CFGDEV to set the device address.
1.14	414	)))
1.16	415	)))
1.2	416
1.14	417	(((
1.16	418	(((
1.2	419	We modify the device address 01 of the first energy meter to 02.
1.14	420	)))
1.16	421	)))
1.2	422
	423	[[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png\|\|alt="Double meter4.png" height="141" width="456"]]
	424
	425	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	426
	427	* 01:device adaress
	428
	429	* 10:function code
	430
	431	* 00 61：Register address
	432
	433	* 00 01：Number of Registers
	434
	435	* 02：Number of bytes
	436
	437	* 00 02：Modified device address
	438
	439	* 1：Check code
	440
	441	The device address setting of the energy meter is complete.
	442
	443	Another energy meter is a single active energy meter with a floating-point format.
	444
	445	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	446
	447	[[image:https://wiki.dragino.com/images/1/13/Meter11.png\|\|alt="Meter11.png" height="576" width="379"]]
	448
	449	[[image:https://wiki.dragino.com/images/thumb/7/7e/Meter12.png/600px-Meter12.png\|\|alt="Meter12.png" height="262" width="600"]]
	450
	451	PAYLOAD:01 08 DF 43 62
	452
	453	* 08 DF is the valid value of the meter with device address 02.
	454	* 43 62 is the valid value of the meter with device address 01.
	455
	456	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	457
	458	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:
	459
	460	[[image:https://wiki.dragino.com/images/thumb/f/fa/RS485_04_2.png/600px-RS485_04_2.png\|\|height="336" width="600"]]
	461
	462	Connection
	463
	464	* [[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
	465
	466	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	467
	468	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:
	469
	470	* [[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
	471
	472	* [[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
	473
	474	== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
	475
	476	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:
	477
	478	* [[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
	479
	480	== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
	481
	482	[[image:https://wiki.dragino.com/images/thumb/9/97/PLC_M221.png/600px-PLC_M221.png\|\|height="353" width="600"]]
	483
	484	Network Structure
	485
	486	* [[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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