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

Version 30.2 by Xiaoling on 2022/05/27 09:38

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
1.2	31	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	32
1.2	33	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	34
10.2	35	[[image:image-20220527092058-3.png]]
1.1	36
1.2	37	Connection
1.1	38
1.18	39
10.2	40	[[image:image-20220527092146-4.png]]
1.2	41
	42	Connection
	43
	44	* [[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
	45	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	46
10.2	47	== ==
	48
1.2	49	== 1.3 Example3: Use RS485-LN with energy meters ==
	50
	51	=== 1.3.1 OverView ===
	52
1.5	53	(((
1.6	54	Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	55	)))
1.2	56
1.5	57	(((
1.2	58	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	59	)))
1.2	60
13.2	61	[[image:image-20220527092419-5.png]]
1.2	62
	63	Connection1
	64
13.2	65
1.19	66	(((
1.2	67	How to connect with Energy Meter：
1.19	68	)))
1.2	69
1.19	70	(((
1.2	71	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	72	)))
1.2	73
1.19	74	(((
1.2	75	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	76	)))
1.2	77
1.19	78	(((
1.2	79	Power Source VIN to RS485-LN VIN+
1.19	80	)))
1.2	81
1.19	82	(((
1.2	83	Power Source GND to RS485-LN VIN-
1.19	84	)))
1.2	85
1.19	86	(((
1.2	87	Once there is power, the RS485-LN will be on.
1.19	88	)))
1.2	89
13.2	90	[[image:image-20220527092514-6.png]]
1.2	91
	92	Connection2
	93
	94
20.2	95	[[image:image-20220527092555-7.png]]
1.12	96
1.2	97	Connection3
	98
	99
	100	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
	101
1.7	102	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	103
20.2	104	[[image:image-20220527092629-8.png]]
1.2	105
20.2	106
1.8	107	(% class="box infomessage" %)
	108	(((
20.2	109	Example: AT+COMMAND1=01 03 00 00 00 01 84 0A
1.8	110	)))
1.2	111
	112	* The first byte : slave address code (=001～247)
	113	* The second byte : read register value function code
	114	* 3rd and 4th bytes: start address of register to be read
	115	* 5th and 6th bytes: Number of registers to read
	116	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	117
1.12	118	(((
1.2	119	How to parse the reading of the return command of the parameter：
1.12	120	)))
1.2	121
1.8	122	(% class="box infomessage" %)
	123	(((
20.2	124	Example: RETURN1：01 03 02 08 FD 7E 05
1.8	125	)))
1.2	126
	127	* The first byte ARD: slave address code (=001～254)
	128	* The second byte: Return to read function code
	129	* 3rd byte: total number of bytes
	130	* 4th～5th bytes: register data
	131	* The 6th and 7th bytes: CRC16 checksum
	132	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	133
20.2	134	(% class="wikigeneratedid" %)
	135	(((
	136
	137	)))
	138
1.2	139	=== 1.3.3 How to configure RS485-LN and parse output commands ===
	140
	141	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	142
20.2	143
1.8	144	==== 1.3.3.1 via AT COMMAND: ====
1.2	145
1.8	146	First, we can use AT+CFGDEV to get the return value, and we can also judge whether the input parameters are correct.
1.2	147
1.8	148	(((
1.2	149	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	150	)))
1.2	151
20.2	152	[[image:image-20220527092748-9.png]]
1.2	153
1.12	154	AT COMMAND
1.2	155
20.2	156
1.8	157	(% class="box infomessage" %)
	158	(((
4.2	159	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	160	)))
1.2	161
	162	a: length for the return of AT+COMMAND
	163
	164	b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
	165
	166	c: define the position for valid value.
	167
20.2	168	[[image:image-20220527092936-10.png]]
1.2	169
	170	AT COMMAND
	171
20.2	172
1.2	173	PAYLOAD is available after the valid value is intercepted.
	174
1.8	175
20.2	176	[[image:image-20220527093059-11.png]]
1.2	177
	178	AT COMMAND
	179
20.2	180
1.2	181	You can get configured PAYLOAD on TTN.
	182
20.2	183	[[image:image-20220527093133-12.png]]
1.8	184
1.12	185	(((
1.2	186	AT COMMAND
1.12	187	)))
1.2	188
1.12	189	(((
1.13	190
	191	)))
	192
	193	(((
1.8	194	Example: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	195	)))
1.2	196
1.12	197	(((
1.2	198	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	199	)))
1.2	200
1.12	201	(((
1.2	202	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	203	)))
1.2	204
1.12	205	(((
1.2	206	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	207	)))
1.2	208
1.12	209	(((
1.2	210	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	211	)))
1.2	212
1.12	213	(((
1.2	214	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	215	)))
1.2	216
1.12	217	(((
1.2	218	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	219	)))
1.2	220
1.12	221	(((
1.2	222	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	223	)))
1.2	224
1.12	225	(((
1.2	226	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	227	)))
1.2	228
1.12	229	(((
1.2	230	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	231	)))
1.2	232
20.2	233	[[image:image-20220527093204-13.png]]
1.2	234
	235	AT COMMAND
	236
20.2	237
21.2	238	(% 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	239
20.2	240	[[image:image-20220527093251-14.png]]
1.8	241
1.2	242	AT COMMAND
	243
	244
1.8	245	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
	246
21.2	247	[[image:image-20220527093358-15.png]]
1.2	248
1.9	249	(((
1.2	250	DOWNLINK
1.9	251	)))
1.2	252
1.9	253	(((
	254
	255	)))
	256
	257	(((
4.3	258	Type Code 0xAF
1.9	259	)))
1.2	260
1.9	261	(((
4.3	262	(% class="box infomessage" %)
	263	(((
1.2	264	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	265	)))
4.3	266	)))
1.2	267
1.9	268	(((
1.2	269	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	270	)))
1.2	271
1.9	272	(((
1.2	273	Format: AF MM NN LL XX XX XX XX YY
1.9	274	)))
1.2	275
1.9	276	(((
1.2	277	Where:
1.9	278	)))
1.2	279
1.9	280	(((
1.2	281	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	282	)))
1.2	283
1.9	284	(((
1.2	285	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	286	)))
1.2	287
1.9	288	(((
1.2	289	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	290	)))
1.2	291
1.9	292	(((
1.2	293	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	294	)))
1.2	295
1.9	296	(((
1.2	297	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	298	)))
1.2	299
1.9	300	(((
1.2	301	will execute an uplink after got this command.
1.9	302	)))
1.2	303
1.9	304	(((
1.2	305	Example:
1.9	306	)))
1.2	307
1.9	308	(((
1.2	309	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	310	)))
1.2	311
22.2	312	[[image:image-20220527093430-16.png]]
1.2	313
	314	DOWNLINK
	315
1.8	316
24.2	317	[[image:image-20220527093508-17.png]]
1.2	318
	319	DOWNLINK
	320
1.8	321
24.2	322	[[image:image-20220527093530-18.png]]
1.2	323
	324	DOWNLINK
	325
1.8	326
26.2	327	[[image:image-20220527093607-19.png]]
1.2	328
	329	DOWNLINK
	330
1.15	331
26.2	332	[[image:image-20220527093628-20.png]]
1.2	333
	334	DOWNLINK
	335
	336
	337	=== 1.3.4 How to configure and output commands for RS485 to USB ===
	338
1.13	339	(((
1.2	340	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	341	)))
1.2	342
1.13	343	(((
1.2	344	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	345	)))
1.2	346
1.13	347	(((
1.2	348	Open the serial port debugging, set the send and receive to HEX.
1.13	349	)))
1.2	350
1.13	351	(((
1.2	352	Baud rate: 9600
1.13	353	)))
1.2	354
1.13	355	(((
1.2	356	check digit: Even
1.13	357	)))
1.2	358
27.2	359	[[image:image-20220527093708-21.png]]
1.2	360
	361	USB
	362
1.13	363
29.2	364	[[image:image-20220527093747-22.png]]
1.2	365
	366	USB
	367
1.13	368
	369	(((
1.2	370	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	371	)))
1.2	372
1.13	373	(((
	374	Example: input：01 03 00 31 00 02 95 c4
	375	)))
1.2	376
1.13	377	(((
4.6	378	output：01 03 04 00 00 00 42 7A 02
1.13	379	)))
1.2	380
29.2	381	[[image:image-20220527093821-23.png]]
1.2	382
	383	USB
	384
29.2	385
1.2	386	=== 1.3.5 How to configure multiple devices and modify device addresses ===
	387
	388	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.
	389
1.14	390	(((
1.15	391	(((
1.2	392	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	393	)))
1.15	394	)))
1.2	395
30.2	396	[[image:image-20220527093849-24.png]]
1.2	397
30.2	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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