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

Version 41.15 by Xiaoling on 2022/06/01 14:14

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6.2	1	(% class="wikigeneratedid" %)
	2	Contents:
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	4	{{toc/}}
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41.2	6
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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
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
41.14	106
20.2	107	[[image:image-20220527092555-7.png]]
1.12	108
1.2	109	Connection3
	110
	111
41.7	112	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	113
1.7	114	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	115
20.2	116	[[image:image-20220527092629-8.png]]
1.2	117
20.2	118
1.8	119	(% class="box infomessage" %)
	120	(((
20.2	121	Example: AT+COMMAND1=01 03 00 00 00 01 84 0A
1.8	122	)))
1.2	123
	124	* The first byte : slave address code (=001～247)
	125	* The second byte : read register value function code
	126	* 3rd and 4th bytes: start address of register to be read
	127	* 5th and 6th bytes: Number of registers to read
	128	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	129
1.12	130	(((
1.2	131	How to parse the reading of the return command of the parameter：
1.12	132	)))
1.2	133
1.8	134	(% class="box infomessage" %)
	135	(((
20.2	136	Example: RETURN1：01 03 02 08 FD 7E 05
1.8	137	)))
1.2	138
	139	* The first byte ARD: slave address code (=001～254)
	140	* The second byte: Return to read function code
	141	* 3rd byte: total number of bytes
	142	* 4th～5th bytes: register data
	143	* The 6th and 7th bytes: CRC16 checksum
	144	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	145
20.2	146	(% class="wikigeneratedid" %)
	147	(((
	148
	149	)))
	150
41.2	151	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	152
	153	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	154
20.2	155
41.2	156	==== 1.3.3.1 via AT COMMAND: ====
1.2	157
1.8	158	First, we can use AT+CFGDEV to get the return value, and we can also judge whether the input parameters are correct.
1.2	159
1.8	160	(((
1.2	161	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	162	)))
1.2	163
20.2	164	[[image:image-20220527092748-9.png]]
1.2	165
1.12	166	AT COMMAND
1.2	167
20.2	168
1.8	169	(% class="box infomessage" %)
	170	(((
4.2	171	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	172	)))
1.2	173
41.15	174	a: length for the return of AT+COMMAND
1.2	175
41.15	176	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	177
41.15	178	c: define the position for valid value.
1.2	179
20.2	180	[[image:image-20220527092936-10.png]]
1.2	181
	182	AT COMMAND
	183
20.2	184
41.15	185
1.2	186	PAYLOAD is available after the valid value is intercepted.
	187
1.8	188
20.2	189	[[image:image-20220527093059-11.png]]
1.2	190
	191	AT COMMAND
	192
20.2	193
1.2	194	You can get configured PAYLOAD on TTN.
	195
20.2	196	[[image:image-20220527093133-12.png]]
1.8	197
1.12	198	(((
1.2	199	AT COMMAND
1.12	200	)))
1.2	201
1.12	202	(((
1.13	203
	204	)))
	205
	206	(((
39.4	207	(% style="color:#4f81bd" %)Example:
39.3	208
	209	CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	210	)))
1.2	211
1.12	212	(((
1.2	213	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	214	)))
1.2	215
1.12	216	(((
1.2	217	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	218
	219
1.12	220	)))
1.2	221
1.12	222	(((
1.2	223	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	224	)))
1.2	225
1.12	226	(((
1.2	227	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	228	)))
1.2	229
1.12	230	(((
1.2	231	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	232
	233
1.12	234	)))
1.2	235
1.12	236	(((
1.2	237	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	238	)))
1.2	239
1.12	240	(((
1.2	241	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	242	)))
1.2	243
1.12	244	(((
1.2	245	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	246	)))
1.2	247
1.12	248	(((
1.2	249	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	250	)))
1.2	251
20.2	252	[[image:image-20220527093204-13.png]]
1.2	253
	254	AT COMMAND
	255
20.2	256
21.2	257	(% 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	258
20.2	259	[[image:image-20220527093251-14.png]]
1.8	260
1.2	261	AT COMMAND
	262
	263
41.2	264	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	265
21.2	266	[[image:image-20220527093358-15.png]]
1.2	267
1.9	268	(((
1.2	269	DOWNLINK
1.9	270	)))
1.2	271
1.9	272	(((
	273
	274	)))
	275
	276	(((
39.4	277	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	278	)))
1.2	279
1.9	280	(((
4.3	281	(% class="box infomessage" %)
	282	(((
1.2	283	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	284	)))
4.3	285	)))
1.2	286
1.9	287	(((
1.2	288	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	289	)))
1.2	290
1.9	291	(((
1.2	292	Format: AF MM NN LL XX XX XX XX YY
1.9	293	)))
1.2	294
1.9	295	(((
1.2	296	Where:
1.9	297	)))
1.2	298
1.9	299	(((
1.2	300	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	301	)))
1.2	302
1.9	303	(((
1.2	304	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	305	)))
1.2	306
1.9	307	(((
1.2	308	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	309	)))
1.2	310
1.9	311	(((
1.2	312	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	313	)))
1.2	314
1.9	315	(((
1.2	316	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	317	)))
1.2	318
1.9	319	(((
1.2	320	will execute an uplink after got this command.
1.9	321	)))
1.2	322
1.9	323	(((
39.4	324	(% style="color:#4f81bd" %)Example:
1.9	325	)))
1.2	326
1.9	327	(((
39.4	328	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	329	)))
1.2	330
22.2	331	[[image:image-20220527093430-16.png]]
1.2	332
	333	DOWNLINK
	334
1.8	335
24.2	336	[[image:image-20220527093508-17.png]]
1.2	337
	338	DOWNLINK
	339
1.8	340
24.2	341	[[image:image-20220527093530-18.png]]
1.2	342
	343	DOWNLINK
	344
1.8	345
26.2	346	[[image:image-20220527093607-19.png]]
1.2	347
	348	DOWNLINK
	349
1.15	350
26.2	351	[[image:image-20220527093628-20.png]]
1.2	352
	353	DOWNLINK
	354
	355
41.2	356	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	357
1.13	358	(((
1.2	359	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	360	)))
1.2	361
1.13	362	(((
1.2	363	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	364	)))
1.2	365
1.13	366	(((
1.2	367	Open the serial port debugging, set the send and receive to HEX.
1.13	368	)))
1.2	369
1.13	370	(((
1.2	371	Baud rate: 9600
1.13	372	)))
1.2	373
1.13	374	(((
1.2	375	check digit: Even
1.13	376	)))
1.2	377
27.2	378	[[image:image-20220527093708-21.png]]
1.2	379
	380	USB
	381
1.13	382
29.2	383	[[image:image-20220527093747-22.png]]
1.2	384
	385	USB
	386
1.13	387
	388	(((
1.2	389	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	390	)))
1.2	391
1.13	392	(((
39.4	393	(% style="color:#4f81bd" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	394	)))
1.2	395
1.13	396	(((
4.6	397	output：01 03 04 00 00 00 42 7A 02
1.13	398	)))
1.2	399
29.2	400	[[image:image-20220527093821-23.png]]
1.2	401
	402	USB
	403
29.2	404
41.2	405	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	406
	407	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.
	408
1.14	409	(((
1.15	410	(((
1.2	411	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	412	)))
1.15	413	)))
1.2	414
30.2	415	[[image:image-20220527093849-24.png]]
1.2	416
30.2	417
1.16	418	Example:These two meters are examples of setting parameters and device addresses.
1.2	419
31.2	420	[[image:image-20220527093950-25.png]]
1.2	421
32.2	422	[[image:image-20220527094028-26.png]]
1.2	423
1.14	424	(((
1.16	425	(((
1.2	426	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	427	)))
1.16	428	)))
1.2	429
1.14	430	(((
1.16	431	(((
1.2	432	We can use AT+CFGDEV to set the device address.
1.14	433	)))
1.16	434	)))
1.2	435
1.14	436	(((
1.16	437	(((
1.2	438	We modify the device address 01 of the first energy meter to 02.
1.14	439	)))
1.16	440	)))
1.2	441
35.2	442	[[image:image-20220527094100-27.png]]
1.2	443
35.2	444	(% class="box infomessage" %)
	445	(((
	446	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	447	)))
1.2	448
	449	* 01:device adaress
	450
	451	* 10:function code
	452
	453	* 00 61：Register address
	454
	455	* 00 01：Number of Registers
	456
	457	* 02：Number of bytes
	458
	459	* 00 02：Modified device address
	460
	461	* 1：Check code
	462
	463	The device address setting of the energy meter is complete.
	464
	465	Another energy meter is a single active energy meter with a floating-point format.
	466
	467	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	468
35.2	469	[[image:image-20220527094150-28.png]]
1.2	470
	471
35.2	472	[[image:image-20220527094224-29.png]]
	473
39.5	474	PAYLOAD:01 08 DF 43 62
1.2	475
	476	* 08 DF is the valid value of the meter with device address 02.
	477	* 43 62 is the valid value of the meter with device address 01.
	478
39.5	479
1.2	480	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	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-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:
	483
36.2	484	[[image:image-20220527094330-30.png]]
1.2	485
	486	Connection
	487
	488	* [[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
	489
41.9	490
1.2	491	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	492
	493	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:
	494
	495	* [[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
	496
	497	* [[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
	498
	499	== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
	500
	501	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:
	502
	503	* [[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
	504
	505	== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
	506
38.1	507	[[image:image-20220527094556-31.png]]
1.2	508
	509	Network Structure
	510
	511	* [[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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