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

Version 40.2 by Xiaoling on 2022/05/27 09:55

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
38.2	10
1.2	11	== 1.1 Example 1: Connect to Leak relay and VFD ==
1.1	12
1.2	13	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	14
10.2	15	[[image:image-20220527091852-1.png]]
1.1	16
1.2	17	Connection
1.1	18
1.18	19
1.1	20
10.2	21	[[image:image-20220527091942-2.png]](% style="display:none" %)
	22
1.2	23	Connection
1.1	24
10.2	25
1.2	26	Related documents:
1.1	27
1.2	28	* [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
	29	* [[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.
	30	* [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
1.1	31
40.2	32
1.2	33	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	34
1.2	35	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	36
10.2	37	[[image:image-20220527092058-3.png]]
1.1	38
1.2	39	Connection
1.1	40
1.18	41
10.2	42	[[image:image-20220527092146-4.png]]
1.2	43
	44	Connection
	45
	46	* [[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
	47	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	48
10.2	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	(((
39.4	196	(% style="color:#4f81bd" %)Example:
39.3	197
	198	CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	199	)))
1.2	200
1.12	201	(((
1.2	202	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	203	)))
1.2	204
1.12	205	(((
1.2	206	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	207
	208
1.12	209	)))
1.2	210
1.12	211	(((
1.2	212	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	213	)))
1.2	214
1.12	215	(((
1.2	216	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	217	)))
1.2	218
1.12	219	(((
1.2	220	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	221
	222
1.12	223	)))
1.2	224
1.12	225	(((
1.2	226	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	227	)))
1.2	228
1.12	229	(((
1.2	230	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	231	)))
1.2	232
1.12	233	(((
1.2	234	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	235	)))
1.2	236
1.12	237	(((
1.2	238	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	239	)))
1.2	240
20.2	241	[[image:image-20220527093204-13.png]]
1.2	242
	243	AT COMMAND
	244
20.2	245
21.2	246	(% 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	247
20.2	248	[[image:image-20220527093251-14.png]]
1.8	249
1.2	250	AT COMMAND
	251
	252
1.8	253	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
	254
21.2	255	[[image:image-20220527093358-15.png]]
1.2	256
1.9	257	(((
1.2	258	DOWNLINK
1.9	259	)))
1.2	260
1.9	261	(((
	262
	263	)))
	264
	265	(((
39.4	266	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	267	)))
1.2	268
1.9	269	(((
4.3	270	(% class="box infomessage" %)
	271	(((
1.2	272	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	273	)))
4.3	274	)))
1.2	275
1.9	276	(((
1.2	277	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	278	)))
1.2	279
1.9	280	(((
1.2	281	Format: AF MM NN LL XX XX XX XX YY
1.9	282	)))
1.2	283
1.9	284	(((
1.2	285	Where:
1.9	286	)))
1.2	287
1.9	288	(((
1.2	289	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	290	)))
1.2	291
1.9	292	(((
1.2	293	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	294	)))
1.2	295
1.9	296	(((
1.2	297	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	298	)))
1.2	299
1.9	300	(((
1.2	301	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	302	)))
1.2	303
1.9	304	(((
1.2	305	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	306	)))
1.2	307
1.9	308	(((
1.2	309	will execute an uplink after got this command.
1.9	310	)))
1.2	311
1.9	312	(((
39.4	313	(% style="color:#4f81bd" %)Example:
1.9	314	)))
1.2	315
1.9	316	(((
39.4	317	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	318	)))
1.2	319
22.2	320	[[image:image-20220527093430-16.png]]
1.2	321
	322	DOWNLINK
	323
1.8	324
24.2	325	[[image:image-20220527093508-17.png]]
1.2	326
	327	DOWNLINK
	328
1.8	329
24.2	330	[[image:image-20220527093530-18.png]]
1.2	331
	332	DOWNLINK
	333
1.8	334
26.2	335	[[image:image-20220527093607-19.png]]
1.2	336
	337	DOWNLINK
	338
1.15	339
26.2	340	[[image:image-20220527093628-20.png]]
1.2	341
	342	DOWNLINK
	343
	344
	345	=== 1.3.4 How to configure and output commands for RS485 to USB ===
	346
1.13	347	(((
1.2	348	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	349	)))
1.2	350
1.13	351	(((
1.2	352	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	353	)))
1.2	354
1.13	355	(((
1.2	356	Open the serial port debugging, set the send and receive to HEX.
1.13	357	)))
1.2	358
1.13	359	(((
1.2	360	Baud rate: 9600
1.13	361	)))
1.2	362
1.13	363	(((
1.2	364	check digit: Even
1.13	365	)))
1.2	366
27.2	367	[[image:image-20220527093708-21.png]]
1.2	368
	369	USB
	370
1.13	371
29.2	372	[[image:image-20220527093747-22.png]]
1.2	373
	374	USB
	375
1.13	376
	377	(((
1.2	378	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	379	)))
1.2	380
1.13	381	(((
39.4	382	(% style="color:#4f81bd" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	383	)))
1.2	384
1.13	385	(((
4.6	386	output：01 03 04 00 00 00 42 7A 02
1.13	387	)))
1.2	388
29.2	389	[[image:image-20220527093821-23.png]]
1.2	390
	391	USB
	392
29.2	393
1.2	394	=== 1.3.5 How to configure multiple devices and modify device addresses ===
	395
	396	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.
	397
1.14	398	(((
1.15	399	(((
1.2	400	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	401	)))
1.15	402	)))
1.2	403
30.2	404	[[image:image-20220527093849-24.png]]
1.2	405
30.2	406
1.16	407	Example:These two meters are examples of setting parameters and device addresses.
1.2	408
31.2	409	[[image:image-20220527093950-25.png]]
1.2	410
32.2	411	[[image:image-20220527094028-26.png]]
1.2	412
1.14	413	(((
1.16	414	(((
1.2	415	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	416	)))
1.16	417	)))
1.2	418
1.14	419	(((
1.16	420	(((
1.2	421	We can use AT+CFGDEV to set the device address.
1.14	422	)))
1.16	423	)))
1.2	424
1.14	425	(((
1.16	426	(((
1.2	427	We modify the device address 01 of the first energy meter to 02.
1.14	428	)))
1.16	429	)))
1.2	430
35.2	431	[[image:image-20220527094100-27.png]]
1.2	432
35.2	433	(% class="box infomessage" %)
	434	(((
	435	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	436	)))
1.2	437
	438	* 01:device adaress
	439
	440	* 10:function code
	441
	442	* 00 61：Register address
	443
	444	* 00 01：Number of Registers
	445
	446	* 02：Number of bytes
	447
	448	* 00 02：Modified device address
	449
	450	* 1：Check code
	451
	452	The device address setting of the energy meter is complete.
	453
	454	Another energy meter is a single active energy meter with a floating-point format.
	455
	456	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	457
35.2	458	[[image:image-20220527094150-28.png]]
1.2	459
	460
35.2	461	[[image:image-20220527094224-29.png]]
	462
39.5	463	PAYLOAD:01 08 DF 43 62
1.2	464
	465	* 08 DF is the valid value of the meter with device address 02.
	466	* 43 62 is the valid value of the meter with device address 01.
	467
39.5	468
1.2	469	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	470
	471	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:
	472
36.2	473	[[image:image-20220527094330-30.png]]
1.2	474
	475	Connection
	476
	477	* [[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
	478
39.6	479
1.2	480	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	481
	482	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:
	483
	484	* [[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
	485
	486	* [[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
	487
39.6	488
1.2	489	== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with 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-LN to connect to CEM C31 485-T1-MID and send the data for remote minitor. The structure is like below:
	492
	493	* [[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
	494
39.7	495
1.2	496	== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
	497
38.1	498	[[image:image-20220527094556-31.png]]
1.2	499
	500	Network Structure
	501
	502	* [[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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