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

Version 41.6 by Xiaoling on 2022/05/30 11:26

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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
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
41.6	37
	38
1.2	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
10.2	48	[[image:image-20220527092146-4.png]]
1.2	49
	50	Connection
	51
	52	* [[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
	53	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	54
10.2	55	== ==
	56
1.2	57	== 1.3 Example3: Use RS485-LN with energy meters ==
	58
	59	=== 1.3.1 OverView ===
	60
1.5	61	(((
1.6	62	Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	63	)))
1.2	64
1.5	65	(((
1.2	66	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	67	)))
1.2	68
13.2	69	[[image:image-20220527092419-5.png]]
1.2	70
	71	Connection1
	72
13.2	73
1.19	74	(((
1.2	75	How to connect with Energy Meter：
1.19	76	)))
1.2	77
1.19	78	(((
1.2	79	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	80	)))
1.2	81
1.19	82	(((
1.2	83	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	84	)))
1.2	85
1.19	86	(((
1.2	87	Power Source VIN to RS485-LN VIN+
1.19	88	)))
1.2	89
1.19	90	(((
1.2	91	Power Source GND to RS485-LN VIN-
1.19	92	)))
1.2	93
1.19	94	(((
1.2	95	Once there is power, the RS485-LN will be on.
1.19	96	)))
1.2	97
13.2	98	[[image:image-20220527092514-6.png]]
1.2	99
	100	Connection2
	101
	102
20.2	103	[[image:image-20220527092555-7.png]]
1.12	104
1.2	105	Connection3
	106
	107
	108	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
	109
1.7	110	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	111
20.2	112	[[image:image-20220527092629-8.png]]
1.2	113
20.2	114
1.8	115	(% class="box infomessage" %)
	116	(((
20.2	117	Example: AT+COMMAND1=01 03 00 00 00 01 84 0A
1.8	118	)))
1.2	119
	120	* The first byte : slave address code (=001～247)
	121	* The second byte : read register value function code
	122	* 3rd and 4th bytes: start address of register to be read
	123	* 5th and 6th bytes: Number of registers to read
	124	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	125
1.12	126	(((
1.2	127	How to parse the reading of the return command of the parameter：
1.12	128	)))
1.2	129
1.8	130	(% class="box infomessage" %)
	131	(((
20.2	132	Example: RETURN1：01 03 02 08 FD 7E 05
1.8	133	)))
1.2	134
	135	* The first byte ARD: slave address code (=001～254)
	136	* The second byte: Return to read function code
	137	* 3rd byte: total number of bytes
	138	* 4th～5th bytes: register data
	139	* The 6th and 7th bytes: CRC16 checksum
	140	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	141
20.2	142	(% class="wikigeneratedid" %)
	143	(((
	144
	145	)))
	146
41.2	147	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	148
	149	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	150
20.2	151
41.2	152	==== 1.3.3.1 via AT COMMAND: ====
1.2	153
1.8	154	First, we can use AT+CFGDEV to get the return value, and we can also judge whether the input parameters are correct.
1.2	155
1.8	156	(((
1.2	157	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	158	)))
1.2	159
20.2	160	[[image:image-20220527092748-9.png]]
1.2	161
1.12	162	AT COMMAND
1.2	163
20.2	164
1.8	165	(% class="box infomessage" %)
	166	(((
4.2	167	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	168	)))
1.2	169
	170	a: length for the return of AT+COMMAND
	171
	172	b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
	173
	174	c: define the position for valid value.
	175
20.2	176	[[image:image-20220527092936-10.png]]
1.2	177
	178	AT COMMAND
	179
20.2	180
1.2	181	PAYLOAD is available after the valid value is intercepted.
	182
1.8	183
20.2	184	[[image:image-20220527093059-11.png]]
1.2	185
	186	AT COMMAND
	187
20.2	188
1.2	189	You can get configured PAYLOAD on TTN.
	190
20.2	191	[[image:image-20220527093133-12.png]]
1.8	192
1.12	193	(((
1.2	194	AT COMMAND
1.12	195	)))
1.2	196
1.12	197	(((
1.13	198
	199	)))
	200
	201	(((
39.4	202	(% style="color:#4f81bd" %)Example:
39.3	203
	204	CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	205	)))
1.2	206
1.12	207	(((
1.2	208	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	209	)))
1.2	210
1.12	211	(((
1.2	212	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	213
	214
1.12	215	)))
1.2	216
1.12	217	(((
1.2	218	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	219	)))
1.2	220
1.12	221	(((
1.2	222	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	223	)))
1.2	224
1.12	225	(((
1.2	226	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	227
	228
1.12	229	)))
1.2	230
1.12	231	(((
1.2	232	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	233	)))
1.2	234
1.12	235	(((
1.2	236	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	237	)))
1.2	238
1.12	239	(((
1.2	240	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	241	)))
1.2	242
1.12	243	(((
1.2	244	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	245	)))
1.2	246
20.2	247	[[image:image-20220527093204-13.png]]
1.2	248
	249	AT COMMAND
	250
20.2	251
21.2	252	(% 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	253
20.2	254	[[image:image-20220527093251-14.png]]
1.8	255
1.2	256	AT COMMAND
	257
	258
41.2	259	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	260
21.2	261	[[image:image-20220527093358-15.png]]
1.2	262
1.9	263	(((
1.2	264	DOWNLINK
1.9	265	)))
1.2	266
1.9	267	(((
	268
	269	)))
	270
	271	(((
39.4	272	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	273	)))
1.2	274
1.9	275	(((
4.3	276	(% class="box infomessage" %)
	277	(((
1.2	278	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	279	)))
4.3	280	)))
1.2	281
1.9	282	(((
1.2	283	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	284	)))
1.2	285
1.9	286	(((
1.2	287	Format: AF MM NN LL XX XX XX XX YY
1.9	288	)))
1.2	289
1.9	290	(((
1.2	291	Where:
1.9	292	)))
1.2	293
1.9	294	(((
1.2	295	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	296	)))
1.2	297
1.9	298	(((
1.2	299	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	300	)))
1.2	301
1.9	302	(((
1.2	303	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	304	)))
1.2	305
1.9	306	(((
1.2	307	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	308	)))
1.2	309
1.9	310	(((
1.2	311	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	312	)))
1.2	313
1.9	314	(((
1.2	315	will execute an uplink after got this command.
1.9	316	)))
1.2	317
1.9	318	(((
39.4	319	(% style="color:#4f81bd" %)Example:
1.9	320	)))
1.2	321
1.9	322	(((
39.4	323	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	324	)))
1.2	325
22.2	326	[[image:image-20220527093430-16.png]]
1.2	327
	328	DOWNLINK
	329
1.8	330
24.2	331	[[image:image-20220527093508-17.png]]
1.2	332
	333	DOWNLINK
	334
1.8	335
24.2	336	[[image:image-20220527093530-18.png]]
1.2	337
	338	DOWNLINK
	339
1.8	340
26.2	341	[[image:image-20220527093607-19.png]]
1.2	342
	343	DOWNLINK
	344
1.15	345
26.2	346	[[image:image-20220527093628-20.png]]
1.2	347
	348	DOWNLINK
	349
	350
41.2	351	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	352
1.13	353	(((
1.2	354	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	355	)))
1.2	356
1.13	357	(((
1.2	358	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	359	)))
1.2	360
1.13	361	(((
1.2	362	Open the serial port debugging, set the send and receive to HEX.
1.13	363	)))
1.2	364
1.13	365	(((
1.2	366	Baud rate: 9600
1.13	367	)))
1.2	368
1.13	369	(((
1.2	370	check digit: Even
1.13	371	)))
1.2	372
27.2	373	[[image:image-20220527093708-21.png]]
1.2	374
	375	USB
	376
1.13	377
29.2	378	[[image:image-20220527093747-22.png]]
1.2	379
	380	USB
	381
1.13	382
	383	(((
1.2	384	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	385	)))
1.2	386
1.13	387	(((
39.4	388	(% style="color:#4f81bd" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	389	)))
1.2	390
1.13	391	(((
4.6	392	output：01 03 04 00 00 00 42 7A 02
1.13	393	)))
1.2	394
29.2	395	[[image:image-20220527093821-23.png]]
1.2	396
	397	USB
	398
29.2	399
41.2	400	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	401
	402	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.
	403
1.14	404	(((
1.15	405	(((
1.2	406	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	407	)))
1.15	408	)))
1.2	409
30.2	410	[[image:image-20220527093849-24.png]]
1.2	411
30.2	412
1.16	413	Example:These two meters are examples of setting parameters and device addresses.
1.2	414
31.2	415	[[image:image-20220527093950-25.png]]
1.2	416
32.2	417	[[image:image-20220527094028-26.png]]
1.2	418
1.14	419	(((
1.16	420	(((
1.2	421	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	422	)))
1.16	423	)))
1.2	424
1.14	425	(((
1.16	426	(((
1.2	427	We can use AT+CFGDEV to set the device address.
1.14	428	)))
1.16	429	)))
1.2	430
1.14	431	(((
1.16	432	(((
1.2	433	We modify the device address 01 of the first energy meter to 02.
1.14	434	)))
1.16	435	)))
1.2	436
35.2	437	[[image:image-20220527094100-27.png]]
1.2	438
35.2	439	(% class="box infomessage" %)
	440	(((
	441	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	442	)))
1.2	443
	444	* 01:device adaress
	445
	446	* 10:function code
	447
	448	* 00 61：Register address
	449
	450	* 00 01：Number of Registers
	451
	452	* 02：Number of bytes
	453
	454	* 00 02：Modified device address
	455
	456	* 1：Check code
	457
	458	The device address setting of the energy meter is complete.
	459
	460	Another energy meter is a single active energy meter with a floating-point format.
	461
	462	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	463
35.2	464	[[image:image-20220527094150-28.png]]
1.2	465
	466
35.2	467	[[image:image-20220527094224-29.png]]
	468
39.5	469	PAYLOAD:01 08 DF 43 62
1.2	470
	471	* 08 DF is the valid value of the meter with device address 02.
	472	* 43 62 is the valid value of the meter with device address 01.
	473
39.5	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
39.6	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
1.2	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
41.4	501
1.2	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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