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

Version 41.3 by Xiaoling on 2022/05/30 11:24

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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
	10
1.2	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
1.2	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
1.2	37	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	38
1.2	39	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	40
10.2	41	[[image:image-20220527092058-3.png]]
1.1	42
1.2	43	Connection
1.1	44
1.18	45
10.2	46	[[image:image-20220527092146-4.png]]
1.2	47
	48	Connection
	49
	50	* [[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
	51	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	52
10.2	53	== ==
	54
1.2	55	== 1.3 Example3: Use RS485-LN with energy meters ==
	56
	57	=== 1.3.1 OverView ===
	58
1.5	59	(((
1.6	60	Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	61	)))
1.2	62
1.5	63	(((
1.2	64	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	65	)))
1.2	66
13.2	67	[[image:image-20220527092419-5.png]]
1.2	68
	69	Connection1
	70
13.2	71
1.19	72	(((
1.2	73	How to connect with Energy Meter：
1.19	74	)))
1.2	75
1.19	76	(((
1.2	77	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	78	)))
1.2	79
1.19	80	(((
1.2	81	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	82	)))
1.2	83
1.19	84	(((
1.2	85	Power Source VIN to RS485-LN VIN+
1.19	86	)))
1.2	87
1.19	88	(((
1.2	89	Power Source GND to RS485-LN VIN-
1.19	90	)))
1.2	91
1.19	92	(((
1.2	93	Once there is power, the RS485-LN will be on.
1.19	94	)))
1.2	95
13.2	96	[[image:image-20220527092514-6.png]]
1.2	97
	98	Connection2
	99
	100
20.2	101	[[image:image-20220527092555-7.png]]
1.12	102
1.2	103	Connection3
	104
	105
	106	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
	107
1.7	108	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	109
20.2	110	[[image:image-20220527092629-8.png]]
1.2	111
20.2	112
1.8	113	(% class="box infomessage" %)
	114	(((
20.2	115	Example: AT+COMMAND1=01 03 00 00 00 01 84 0A
1.8	116	)))
1.2	117
	118	* The first byte : slave address code (=001～247)
	119	* The second byte : read register value function code
	120	* 3rd and 4th bytes: start address of register to be read
	121	* 5th and 6th bytes: Number of registers to read
	122	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	123
1.12	124	(((
1.2	125	How to parse the reading of the return command of the parameter：
1.12	126	)))
1.2	127
1.8	128	(% class="box infomessage" %)
	129	(((
20.2	130	Example: RETURN1：01 03 02 08 FD 7E 05
1.8	131	)))
1.2	132
	133	* The first byte ARD: slave address code (=001～254)
	134	* The second byte: Return to read function code
	135	* 3rd byte: total number of bytes
	136	* 4th～5th bytes: register data
	137	* The 6th and 7th bytes: CRC16 checksum
	138	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	139
20.2	140	(% class="wikigeneratedid" %)
	141	(((
	142
	143	)))
	144
41.2	145	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	146
	147	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	148
20.2	149
41.2	150	==== 1.3.3.1 via AT COMMAND: ====
1.2	151
1.8	152	First, we can use AT+CFGDEV to get the return value, and we can also judge whether the input parameters are correct.
1.2	153
1.8	154	(((
1.2	155	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	156	)))
1.2	157
20.2	158	[[image:image-20220527092748-9.png]]
1.2	159
1.12	160	AT COMMAND
1.2	161
20.2	162
1.8	163	(% class="box infomessage" %)
	164	(((
4.2	165	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	166	)))
1.2	167
	168	a: length for the return of AT+COMMAND
	169
	170	b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
	171
	172	c: define the position for valid value.
	173
20.2	174	[[image:image-20220527092936-10.png]]
1.2	175
	176	AT COMMAND
	177
20.2	178
1.2	179	PAYLOAD is available after the valid value is intercepted.
	180
1.8	181
20.2	182	[[image:image-20220527093059-11.png]]
1.2	183
	184	AT COMMAND
	185
20.2	186
1.2	187	You can get configured PAYLOAD on TTN.
	188
20.2	189	[[image:image-20220527093133-12.png]]
1.8	190
1.12	191	(((
1.2	192	AT COMMAND
1.12	193	)))
1.2	194
1.12	195	(((
1.13	196
	197	)))
	198
	199	(((
39.4	200	(% style="color:#4f81bd" %)Example:
39.3	201
	202	CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	203	)))
1.2	204
1.12	205	(((
1.2	206	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	207	)))
1.2	208
1.12	209	(((
1.2	210	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	211
	212
1.12	213	)))
1.2	214
1.12	215	(((
1.2	216	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	217	)))
1.2	218
1.12	219	(((
1.2	220	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	221	)))
1.2	222
1.12	223	(((
1.2	224	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	225
	226
1.12	227	)))
1.2	228
1.12	229	(((
1.2	230	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	231	)))
1.2	232
1.12	233	(((
1.2	234	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	235	)))
1.2	236
1.12	237	(((
1.2	238	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	239	)))
1.2	240
1.12	241	(((
1.2	242	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	243	)))
1.2	244
20.2	245	[[image:image-20220527093204-13.png]]
1.2	246
	247	AT COMMAND
	248
20.2	249
21.2	250	(% 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	251
20.2	252	[[image:image-20220527093251-14.png]]
1.8	253
1.2	254	AT COMMAND
	255
	256
41.2	257	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	258
21.2	259	[[image:image-20220527093358-15.png]]
1.2	260
1.9	261	(((
1.2	262	DOWNLINK
1.9	263	)))
1.2	264
1.9	265	(((
	266
	267	)))
	268
	269	(((
39.4	270	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	271	)))
1.2	272
1.9	273	(((
4.3	274	(% class="box infomessage" %)
	275	(((
1.2	276	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	277	)))
4.3	278	)))
1.2	279
1.9	280	(((
1.2	281	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	282	)))
1.2	283
1.9	284	(((
1.2	285	Format: AF MM NN LL XX XX XX XX YY
1.9	286	)))
1.2	287
1.9	288	(((
1.2	289	Where:
1.9	290	)))
1.2	291
1.9	292	(((
1.2	293	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	294	)))
1.2	295
1.9	296	(((
1.2	297	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	298	)))
1.2	299
1.9	300	(((
1.2	301	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	302	)))
1.2	303
1.9	304	(((
1.2	305	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	306	)))
1.2	307
1.9	308	(((
1.2	309	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	310	)))
1.2	311
1.9	312	(((
1.2	313	will execute an uplink after got this command.
1.9	314	)))
1.2	315
1.9	316	(((
39.4	317	(% style="color:#4f81bd" %)Example:
1.9	318	)))
1.2	319
1.9	320	(((
39.4	321	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	322	)))
1.2	323
22.2	324	[[image:image-20220527093430-16.png]]
1.2	325
	326	DOWNLINK
	327
1.8	328
24.2	329	[[image:image-20220527093508-17.png]]
1.2	330
	331	DOWNLINK
	332
1.8	333
24.2	334	[[image:image-20220527093530-18.png]]
1.2	335
	336	DOWNLINK
	337
1.8	338
26.2	339	[[image:image-20220527093607-19.png]]
1.2	340
	341	DOWNLINK
	342
1.15	343
26.2	344	[[image:image-20220527093628-20.png]]
1.2	345
	346	DOWNLINK
	347
	348
41.2	349	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	350
1.13	351	(((
1.2	352	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	353	)))
1.2	354
1.13	355	(((
1.2	356	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	357	)))
1.2	358
1.13	359	(((
1.2	360	Open the serial port debugging, set the send and receive to HEX.
1.13	361	)))
1.2	362
1.13	363	(((
1.2	364	Baud rate: 9600
1.13	365	)))
1.2	366
1.13	367	(((
1.2	368	check digit: Even
1.13	369	)))
1.2	370
27.2	371	[[image:image-20220527093708-21.png]]
1.2	372
	373	USB
	374
1.13	375
29.2	376	[[image:image-20220527093747-22.png]]
1.2	377
	378	USB
	379
1.13	380
	381	(((
1.2	382	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	383	)))
1.2	384
1.13	385	(((
39.4	386	(% style="color:#4f81bd" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	387	)))
1.2	388
1.13	389	(((
4.6	390	output：01 03 04 00 00 00 42 7A 02
1.13	391	)))
1.2	392
29.2	393	[[image:image-20220527093821-23.png]]
1.2	394
	395	USB
	396
29.2	397
41.2	398	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	399
	400	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.
	401
1.14	402	(((
1.15	403	(((
1.2	404	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	405	)))
1.15	406	)))
1.2	407
30.2	408	[[image:image-20220527093849-24.png]]
1.2	409
30.2	410
1.16	411	Example:These two meters are examples of setting parameters and device addresses.
1.2	412
31.2	413	[[image:image-20220527093950-25.png]]
1.2	414
32.2	415	[[image:image-20220527094028-26.png]]
1.2	416
1.14	417	(((
1.16	418	(((
1.2	419	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	420	)))
1.16	421	)))
1.2	422
1.14	423	(((
1.16	424	(((
1.2	425	We can use AT+CFGDEV to set the device address.
1.14	426	)))
1.16	427	)))
1.2	428
1.14	429	(((
1.16	430	(((
1.2	431	We modify the device address 01 of the first energy meter to 02.
1.14	432	)))
1.16	433	)))
1.2	434
35.2	435	[[image:image-20220527094100-27.png]]
1.2	436
35.2	437	(% class="box infomessage" %)
	438	(((
	439	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	440	)))
1.2	441
	442	* 01:device adaress
	443
	444	* 10:function code
	445
	446	* 00 61：Register address
	447
	448	* 00 01：Number of Registers
	449
	450	* 02：Number of bytes
	451
	452	* 00 02：Modified device address
	453
	454	* 1：Check code
	455
	456	The device address setting of the energy meter is complete.
	457
	458	Another energy meter is a single active energy meter with a floating-point format.
	459
	460	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	461
35.2	462	[[image:image-20220527094150-28.png]]
1.2	463
	464
35.2	465	[[image:image-20220527094224-29.png]]
	466
39.5	467	PAYLOAD:01 08 DF 43 62
1.2	468
	469	* 08 DF is the valid value of the meter with device address 02.
	470	* 43 62 is the valid value of the meter with device address 01.
	471
39.5	472
41.2	473
1.2	474	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	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 SCHNEIDER SMART and Monitor and control your cabinet remotely with no wires and with Dragino RS485-LN LoRaWAN technology. The structure is like below:
	477
36.2	478	[[image:image-20220527094330-30.png]]
1.2	479
	480	Connection
	481
	482	* [[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
	483
39.6	484
41.2	485
1.2	486	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	487
	488	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:
	489
	490	* [[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
	491
	492	* [[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
	493
41.3	494
	495
1.2	496	== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
	497
	498	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:
	499
	500	* [[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
	501
	502	== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
	503
38.1	504	[[image:image-20220527094556-31.png]]
1.2	505
	506	Network Structure
	507
	508	* [[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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