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

Version 41.9 by Xiaoling on 2022/05/31 09:39

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6.2	1	(% class="wikigeneratedid" %)
	2	Contents:
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	4	{{toc/}}
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41.2	6
	7
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	9
	10
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
41.7	38	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	39
1.2	40	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	41
10.2	42	[[image:image-20220527092058-3.png]]
1.1	43
1.2	44	Connection
1.1	45
1.18	46
10.2	47	[[image:image-20220527092146-4.png]]
1.2	48
	49	Connection
	50
	51	* [[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
	52	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	53
10.2	54	== ==
	55
41.7	56	== 1.3 Example3: Use RS485-LN with energy meters ==
1.2	57
41.7	58	=== 1.3.1 OverView ===
1.2	59
1.5	60	(((
1.6	61	Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	62	)))
1.2	63
1.5	64	(((
1.2	65	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	66	)))
1.2	67
13.2	68	[[image:image-20220527092419-5.png]]
1.2	69
	70	Connection1
	71
13.2	72
1.19	73	(((
1.2	74	How to connect with Energy Meter：
1.19	75	)))
1.2	76
1.19	77	(((
1.2	78	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	79	)))
1.2	80
1.19	81	(((
1.2	82	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	83	)))
1.2	84
1.19	85	(((
1.2	86	Power Source VIN to RS485-LN VIN+
1.19	87	)))
1.2	88
1.19	89	(((
1.2	90	Power Source GND to RS485-LN VIN-
1.19	91	)))
1.2	92
1.19	93	(((
1.2	94	Once there is power, the RS485-LN will be on.
1.19	95	)))
1.2	96
13.2	97	[[image:image-20220527092514-6.png]]
1.2	98
	99	Connection2
	100
	101
20.2	102	[[image:image-20220527092555-7.png]]
1.12	103
1.2	104	Connection3
	105
	106
41.7	107	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	108
1.7	109	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	110
20.2	111	[[image:image-20220527092629-8.png]]
1.2	112
20.2	113
1.8	114	(% class="box infomessage" %)
	115	(((
20.2	116	Example: AT+COMMAND1=01 03 00 00 00 01 84 0A
1.8	117	)))
1.2	118
	119	* The first byte : slave address code (=001～247)
	120	* The second byte : read register value function code
	121	* 3rd and 4th bytes: start address of register to be read
	122	* 5th and 6th bytes: Number of registers to read
	123	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	124
1.12	125	(((
1.2	126	How to parse the reading of the return command of the parameter：
1.12	127	)))
1.2	128
1.8	129	(% class="box infomessage" %)
	130	(((
20.2	131	Example: RETURN1：01 03 02 08 FD 7E 05
1.8	132	)))
1.2	133
	134	* The first byte ARD: slave address code (=001～254)
	135	* The second byte: Return to read function code
	136	* 3rd byte: total number of bytes
	137	* 4th～5th bytes: register data
	138	* The 6th and 7th bytes: CRC16 checksum
	139	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	140
20.2	141	(% class="wikigeneratedid" %)
	142	(((
	143
	144	)))
	145
41.2	146	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	147
	148	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	149
20.2	150
41.2	151	==== 1.3.3.1 via AT COMMAND: ====
1.2	152
1.8	153	First, we can use AT+CFGDEV to get the return value, and we can also judge whether the input parameters are correct.
1.2	154
1.8	155	(((
1.2	156	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	157	)))
1.2	158
20.2	159	[[image:image-20220527092748-9.png]]
1.2	160
1.12	161	AT COMMAND
1.2	162
20.2	163
1.8	164	(% class="box infomessage" %)
	165	(((
4.2	166	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	167	)))
1.2	168
	169	a: length for the return of AT+COMMAND
	170
	171	b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
	172
	173	c: define the position for valid value.
	174
20.2	175	[[image:image-20220527092936-10.png]]
1.2	176
	177	AT COMMAND
	178
20.2	179
1.2	180	PAYLOAD is available after the valid value is intercepted.
	181
1.8	182
20.2	183	[[image:image-20220527093059-11.png]]
1.2	184
	185	AT COMMAND
	186
20.2	187
1.2	188	You can get configured PAYLOAD on TTN.
	189
20.2	190	[[image:image-20220527093133-12.png]]
1.8	191
1.12	192	(((
1.2	193	AT COMMAND
1.12	194	)))
1.2	195
1.12	196	(((
1.13	197
	198	)))
	199
	200	(((
39.4	201	(% style="color:#4f81bd" %)Example:
39.3	202
	203	CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	204	)))
1.2	205
1.12	206	(((
1.2	207	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	208	)))
1.2	209
1.12	210	(((
1.2	211	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	212
	213
1.12	214	)))
1.2	215
1.12	216	(((
1.2	217	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	218	)))
1.2	219
1.12	220	(((
1.2	221	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	222	)))
1.2	223
1.12	224	(((
1.2	225	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	226
	227
1.12	228	)))
1.2	229
1.12	230	(((
1.2	231	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	232	)))
1.2	233
1.12	234	(((
1.2	235	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	236	)))
1.2	237
1.12	238	(((
1.2	239	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	240	)))
1.2	241
1.12	242	(((
1.2	243	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	244	)))
1.2	245
20.2	246	[[image:image-20220527093204-13.png]]
1.2	247
	248	AT COMMAND
	249
20.2	250
21.2	251	(% 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	252
20.2	253	[[image:image-20220527093251-14.png]]
1.8	254
1.2	255	AT COMMAND
	256
	257
41.2	258	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	259
21.2	260	[[image:image-20220527093358-15.png]]
1.2	261
1.9	262	(((
1.2	263	DOWNLINK
1.9	264	)))
1.2	265
1.9	266	(((
	267
	268	)))
	269
	270	(((
39.4	271	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	272	)))
1.2	273
1.9	274	(((
4.3	275	(% class="box infomessage" %)
	276	(((
1.2	277	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	278	)))
4.3	279	)))
1.2	280
1.9	281	(((
1.2	282	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	283	)))
1.2	284
1.9	285	(((
1.2	286	Format: AF MM NN LL XX XX XX XX YY
1.9	287	)))
1.2	288
1.9	289	(((
1.2	290	Where:
1.9	291	)))
1.2	292
1.9	293	(((
1.2	294	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	295	)))
1.2	296
1.9	297	(((
1.2	298	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	299	)))
1.2	300
1.9	301	(((
1.2	302	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	303	)))
1.2	304
1.9	305	(((
1.2	306	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	307	)))
1.2	308
1.9	309	(((
1.2	310	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	311	)))
1.2	312
1.9	313	(((
1.2	314	will execute an uplink after got this command.
1.9	315	)))
1.2	316
1.9	317	(((
39.4	318	(% style="color:#4f81bd" %)Example:
1.9	319	)))
1.2	320
1.9	321	(((
39.4	322	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	323	)))
1.2	324
22.2	325	[[image:image-20220527093430-16.png]]
1.2	326
	327	DOWNLINK
	328
1.8	329
24.2	330	[[image:image-20220527093508-17.png]]
1.2	331
	332	DOWNLINK
	333
1.8	334
24.2	335	[[image:image-20220527093530-18.png]]
1.2	336
	337	DOWNLINK
	338
1.8	339
26.2	340	[[image:image-20220527093607-19.png]]
1.2	341
	342	DOWNLINK
	343
1.15	344
26.2	345	[[image:image-20220527093628-20.png]]
1.2	346
	347	DOWNLINK
	348
	349
41.2	350	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	351
1.13	352	(((
1.2	353	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	354	)))
1.2	355
1.13	356	(((
1.2	357	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	358	)))
1.2	359
1.13	360	(((
1.2	361	Open the serial port debugging, set the send and receive to HEX.
1.13	362	)))
1.2	363
1.13	364	(((
1.2	365	Baud rate: 9600
1.13	366	)))
1.2	367
1.13	368	(((
1.2	369	check digit: Even
1.13	370	)))
1.2	371
27.2	372	[[image:image-20220527093708-21.png]]
1.2	373
	374	USB
	375
1.13	376
29.2	377	[[image:image-20220527093747-22.png]]
1.2	378
	379	USB
	380
1.13	381
	382	(((
1.2	383	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	384	)))
1.2	385
1.13	386	(((
39.4	387	(% style="color:#4f81bd" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	388	)))
1.2	389
1.13	390	(((
4.6	391	output：01 03 04 00 00 00 42 7A 02
1.13	392	)))
1.2	393
29.2	394	[[image:image-20220527093821-23.png]]
1.2	395
	396	USB
	397
29.2	398
41.2	399	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	400
	401	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.
	402
1.14	403	(((
1.15	404	(((
1.2	405	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	406	)))
1.15	407	)))
1.2	408
30.2	409	[[image:image-20220527093849-24.png]]
1.2	410
30.2	411
1.16	412	Example:These two meters are examples of setting parameters and device addresses.
1.2	413
31.2	414	[[image:image-20220527093950-25.png]]
1.2	415
32.2	416	[[image:image-20220527094028-26.png]]
1.2	417
1.14	418	(((
1.16	419	(((
1.2	420	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	421	)))
1.16	422	)))
1.2	423
1.14	424	(((
1.16	425	(((
1.2	426	We can use AT+CFGDEV to set the device address.
1.14	427	)))
1.16	428	)))
1.2	429
1.14	430	(((
1.16	431	(((
1.2	432	We modify the device address 01 of the first energy meter to 02.
1.14	433	)))
1.16	434	)))
1.2	435
35.2	436	[[image:image-20220527094100-27.png]]
1.2	437
35.2	438	(% class="box infomessage" %)
	439	(((
	440	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	441	)))
1.2	442
	443	* 01:device adaress
	444
	445	* 10:function code
	446
	447	* 00 61：Register address
	448
	449	* 00 01：Number of Registers
	450
	451	* 02：Number of bytes
	452
	453	* 00 02：Modified device address
	454
	455	* 1：Check code
	456
	457	The device address setting of the energy meter is complete.
	458
	459	Another energy meter is a single active energy meter with a floating-point format.
	460
	461	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	462
35.2	463	[[image:image-20220527094150-28.png]]
1.2	464
	465
35.2	466	[[image:image-20220527094224-29.png]]
	467
39.5	468	PAYLOAD:01 08 DF 43 62
1.2	469
	470	* 08 DF is the valid value of the meter with device address 02.
	471	* 43 62 is the valid value of the meter with device address 01.
	472
39.5	473
41.8	474
1.2	475	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	476
	477	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:
	478
36.2	479	[[image:image-20220527094330-30.png]]
1.2	480
	481	Connection
	482
	483	* [[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
	484
41.9	485
	486
1.2	487	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	488
	489	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:
	490
	491	* [[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
	492
	493	* [[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
	494
	495	== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
	496
	497	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:
	498
	499	* [[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
	500
	501	== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
	502
38.1	503	[[image:image-20220527094556-31.png]]
1.2	504
	505	Network Structure
	506
	507	* [[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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