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

Version 41.12 by Xiaoling on 2022/06/01 14:12

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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
41.10	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
1.19	76	(((
1.2	77	How to connect with Energy Meter：
1.19	78	)))
1.2	79
1.19	80	(((
1.2	81	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	82	)))
1.2	83
1.19	84	(((
1.2	85	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	86	)))
1.2	87
1.19	88	(((
1.2	89	Power Source VIN to RS485-LN VIN+
1.19	90	)))
1.2	91
1.19	92	(((
1.2	93	Power Source GND to RS485-LN VIN-
1.19	94	)))
1.2	95
1.19	96	(((
1.2	97	Once there is power, the RS485-LN will be on.
1.19	98	)))
1.2	99
13.2	100	[[image:image-20220527092514-6.png]]
1.2	101
	102	Connection2
	103
	104
20.2	105	[[image:image-20220527092555-7.png]]
1.12	106
1.2	107	Connection3
	108
	109
41.7	110	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	111
1.7	112	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	113
20.2	114	[[image:image-20220527092629-8.png]]
1.2	115
20.2	116
1.8	117	(% class="box infomessage" %)
	118	(((
20.2	119	Example: AT+COMMAND1=01 03 00 00 00 01 84 0A
1.8	120	)))
1.2	121
	122	* The first byte : slave address code (=001～247)
	123	* The second byte : read register value function code
	124	* 3rd and 4th bytes: start address of register to be read
	125	* 5th and 6th bytes: Number of registers to read
	126	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	127
1.12	128	(((
1.2	129	How to parse the reading of the return command of the parameter：
1.12	130	)))
1.2	131
1.8	132	(% class="box infomessage" %)
	133	(((
20.2	134	Example: RETURN1：01 03 02 08 FD 7E 05
1.8	135	)))
1.2	136
	137	* The first byte ARD: slave address code (=001～254)
	138	* The second byte: Return to read function code
	139	* 3rd byte: total number of bytes
	140	* 4th～5th bytes: register data
	141	* The 6th and 7th bytes: CRC16 checksum
	142	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	143
20.2	144	(% class="wikigeneratedid" %)
	145	(((
	146
	147	)))
	148
41.2	149	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	150
	151	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	152
20.2	153
41.2	154	==== 1.3.3.1 via AT COMMAND: ====
1.2	155
1.8	156	First, we can use AT+CFGDEV to get the return value, and we can also judge whether the input parameters are correct.
1.2	157
1.8	158	(((
1.2	159	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	160	)))
1.2	161
20.2	162	[[image:image-20220527092748-9.png]]
1.2	163
1.12	164	AT COMMAND
1.2	165
20.2	166
1.8	167	(% class="box infomessage" %)
	168	(((
4.2	169	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	170	)))
1.2	171
	172	a: length for the return of AT+COMMAND
	173
	174	b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
	175
	176	c: define the position for valid value.
	177
20.2	178	[[image:image-20220527092936-10.png]]
1.2	179
	180	AT COMMAND
	181
20.2	182
1.2	183	PAYLOAD is available after the valid value is intercepted.
	184
1.8	185
20.2	186	[[image:image-20220527093059-11.png]]
1.2	187
	188	AT COMMAND
	189
20.2	190
1.2	191	You can get configured PAYLOAD on TTN.
	192
20.2	193	[[image:image-20220527093133-12.png]]
1.8	194
1.12	195	(((
1.2	196	AT COMMAND
1.12	197	)))
1.2	198
1.12	199	(((
1.13	200
	201	)))
	202
	203	(((
39.4	204	(% style="color:#4f81bd" %)Example:
39.3	205
	206	CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	207	)))
1.2	208
1.12	209	(((
1.2	210	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	211	)))
1.2	212
1.12	213	(((
1.2	214	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	215
	216
1.12	217	)))
1.2	218
1.12	219	(((
1.2	220	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	221	)))
1.2	222
1.12	223	(((
1.2	224	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	225	)))
1.2	226
1.12	227	(((
1.2	228	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	229
	230
1.12	231	)))
1.2	232
1.12	233	(((
1.2	234	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	235	)))
1.2	236
1.12	237	(((
1.2	238	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	239	)))
1.2	240
1.12	241	(((
1.2	242	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	243	)))
1.2	244
1.12	245	(((
1.2	246	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	247	)))
1.2	248
20.2	249	[[image:image-20220527093204-13.png]]
1.2	250
	251	AT COMMAND
	252
20.2	253
21.2	254	(% 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	255
20.2	256	[[image:image-20220527093251-14.png]]
1.8	257
1.2	258	AT COMMAND
	259
	260
41.2	261	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	262
21.2	263	[[image:image-20220527093358-15.png]]
1.2	264
1.9	265	(((
1.2	266	DOWNLINK
1.9	267	)))
1.2	268
1.9	269	(((
	270
	271	)))
	272
	273	(((
39.4	274	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	275	)))
1.2	276
1.9	277	(((
4.3	278	(% class="box infomessage" %)
	279	(((
1.2	280	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	281	)))
4.3	282	)))
1.2	283
1.9	284	(((
1.2	285	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	286	)))
1.2	287
1.9	288	(((
1.2	289	Format: AF MM NN LL XX XX XX XX YY
1.9	290	)))
1.2	291
1.9	292	(((
1.2	293	Where:
1.9	294	)))
1.2	295
1.9	296	(((
1.2	297	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	298	)))
1.2	299
1.9	300	(((
1.2	301	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	302	)))
1.2	303
1.9	304	(((
1.2	305	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	306	)))
1.2	307
1.9	308	(((
1.2	309	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	310	)))
1.2	311
1.9	312	(((
1.2	313	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	314	)))
1.2	315
1.9	316	(((
1.2	317	will execute an uplink after got this command.
1.9	318	)))
1.2	319
1.9	320	(((
39.4	321	(% style="color:#4f81bd" %)Example:
1.9	322	)))
1.2	323
1.9	324	(((
39.4	325	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	326	)))
1.2	327
22.2	328	[[image:image-20220527093430-16.png]]
1.2	329
	330	DOWNLINK
	331
1.8	332
24.2	333	[[image:image-20220527093508-17.png]]
1.2	334
	335	DOWNLINK
	336
1.8	337
24.2	338	[[image:image-20220527093530-18.png]]
1.2	339
	340	DOWNLINK
	341
1.8	342
26.2	343	[[image:image-20220527093607-19.png]]
1.2	344
	345	DOWNLINK
	346
1.15	347
26.2	348	[[image:image-20220527093628-20.png]]
1.2	349
	350	DOWNLINK
	351
	352
41.2	353	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	354
1.13	355	(((
1.2	356	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	357	)))
1.2	358
1.13	359	(((
1.2	360	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	361	)))
1.2	362
1.13	363	(((
1.2	364	Open the serial port debugging, set the send and receive to HEX.
1.13	365	)))
1.2	366
1.13	367	(((
1.2	368	Baud rate: 9600
1.13	369	)))
1.2	370
1.13	371	(((
1.2	372	check digit: Even
1.13	373	)))
1.2	374
27.2	375	[[image:image-20220527093708-21.png]]
1.2	376
	377	USB
	378
1.13	379
29.2	380	[[image:image-20220527093747-22.png]]
1.2	381
	382	USB
	383
1.13	384
	385	(((
1.2	386	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	387	)))
1.2	388
1.13	389	(((
39.4	390	(% style="color:#4f81bd" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	391	)))
1.2	392
1.13	393	(((
4.6	394	output：01 03 04 00 00 00 42 7A 02
1.13	395	)))
1.2	396
29.2	397	[[image:image-20220527093821-23.png]]
1.2	398
	399	USB
	400
29.2	401
41.2	402	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	403
	404	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.
	405
1.14	406	(((
1.15	407	(((
1.2	408	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	409	)))
1.15	410	)))
1.2	411
30.2	412	[[image:image-20220527093849-24.png]]
1.2	413
30.2	414
1.16	415	Example:These two meters are examples of setting parameters and device addresses.
1.2	416
31.2	417	[[image:image-20220527093950-25.png]]
1.2	418
32.2	419	[[image:image-20220527094028-26.png]]
1.2	420
1.14	421	(((
1.16	422	(((
1.2	423	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	424	)))
1.16	425	)))
1.2	426
1.14	427	(((
1.16	428	(((
1.2	429	We can use AT+CFGDEV to set the device address.
1.14	430	)))
1.16	431	)))
1.2	432
1.14	433	(((
1.16	434	(((
1.2	435	We modify the device address 01 of the first energy meter to 02.
1.14	436	)))
1.16	437	)))
1.2	438
35.2	439	[[image:image-20220527094100-27.png]]
1.2	440
35.2	441	(% class="box infomessage" %)
	442	(((
	443	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	444	)))
1.2	445
	446	* 01:device adaress
	447
	448	* 10:function code
	449
	450	* 00 61：Register address
	451
	452	* 00 01：Number of Registers
	453
	454	* 02：Number of bytes
	455
	456	* 00 02：Modified device address
	457
	458	* 1：Check code
	459
	460	The device address setting of the energy meter is complete.
	461
	462	Another energy meter is a single active energy meter with a floating-point format.
	463
	464	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	465
35.2	466	[[image:image-20220527094150-28.png]]
1.2	467
	468
35.2	469	[[image:image-20220527094224-29.png]]
	470
39.5	471	PAYLOAD:01 08 DF 43 62
1.2	472
	473	* 08 DF is the valid value of the meter with device address 02.
	474	* 43 62 is the valid value of the meter with device address 01.
	475
39.5	476
1.2	477	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	478
	479	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:
	480
36.2	481	[[image:image-20220527094330-30.png]]
1.2	482
	483	Connection
	484
	485	* [[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
	486
41.9	487
1.2	488	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	489
	490	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:
	491
	492	* [[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
	493
	494	* [[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
	495
	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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