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

Version 38.2 by Xiaoling on 2022/05/27 09:47

version	line-number	content
6.2	1	(% class="wikigeneratedid" %)
	2	Contents:
	3
	4	{{toc/}}
	5
1.2	6	= 1. Introduction =
1.1	7
1.2	8	This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
1.1	9
38.2	10
1.2	11	== 1.1 Example 1: Connect to Leak relay and VFD ==
1.1	12
1.2	13	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	14
10.2	15	[[image:image-20220527091852-1.png]]
1.1	16
1.2	17	Connection
1.1	18
1.18	19
1.1	20
10.2	21	[[image:image-20220527091942-2.png]](% style="display:none" %)
	22
1.2	23	Connection
1.1	24
10.2	25
1.2	26	Related documents:
1.1	27
1.2	28	* [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
	29	* [[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.
	30	* [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
1.1	31
1.2	32	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	33
1.2	34	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	35
10.2	36	[[image:image-20220527092058-3.png]]
1.1	37
1.2	38	Connection
1.1	39
1.18	40
10.2	41	[[image:image-20220527092146-4.png]]
1.2	42
	43	Connection
	44
	45	* [[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
	46	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	47
10.2	48	== ==
	49
1.2	50	== 1.3 Example3: Use RS485-LN with energy meters ==
	51
	52	=== 1.3.1 OverView ===
	53
1.5	54	(((
1.6	55	Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	56	)))
1.2	57
1.5	58	(((
1.2	59	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	60	)))
1.2	61
13.2	62	[[image:image-20220527092419-5.png]]
1.2	63
	64	Connection1
	65
13.2	66
1.19	67	(((
1.2	68	How to connect with Energy Meter：
1.19	69	)))
1.2	70
1.19	71	(((
1.2	72	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	73	)))
1.2	74
1.19	75	(((
1.2	76	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	77	)))
1.2	78
1.19	79	(((
1.2	80	Power Source VIN to RS485-LN VIN+
1.19	81	)))
1.2	82
1.19	83	(((
1.2	84	Power Source GND to RS485-LN VIN-
1.19	85	)))
1.2	86
1.19	87	(((
1.2	88	Once there is power, the RS485-LN will be on.
1.19	89	)))
1.2	90
13.2	91	[[image:image-20220527092514-6.png]]
1.2	92
	93	Connection2
	94
	95
20.2	96	[[image:image-20220527092555-7.png]]
1.12	97
1.2	98	Connection3
	99
	100
	101	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
	102
1.7	103	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	104
20.2	105	[[image:image-20220527092629-8.png]]
1.2	106
20.2	107
1.8	108	(% class="box infomessage" %)
	109	(((
20.2	110	Example: AT+COMMAND1=01 03 00 00 00 01 84 0A
1.8	111	)))
1.2	112
	113	* The first byte : slave address code (=001～247)
	114	* The second byte : read register value function code
	115	* 3rd and 4th bytes: start address of register to be read
	116	* 5th and 6th bytes: Number of registers to read
	117	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	118
1.12	119	(((
1.2	120	How to parse the reading of the return command of the parameter：
1.12	121	)))
1.2	122
1.8	123	(% class="box infomessage" %)
	124	(((
20.2	125	Example: RETURN1：01 03 02 08 FD 7E 05
1.8	126	)))
1.2	127
	128	* The first byte ARD: slave address code (=001～254)
	129	* The second byte: Return to read function code
	130	* 3rd byte: total number of bytes
	131	* 4th～5th bytes: register data
	132	* The 6th and 7th bytes: CRC16 checksum
	133	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	134
20.2	135	(% class="wikigeneratedid" %)
	136	(((
	137
	138	)))
	139
1.2	140	=== 1.3.3 How to configure RS485-LN and parse output commands ===
	141
	142	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	143
20.2	144
1.8	145	==== 1.3.3.1 via AT COMMAND: ====
1.2	146
1.8	147	First, we can use AT+CFGDEV to get the return value, and we can also judge whether the input parameters are correct.
1.2	148
1.8	149	(((
1.2	150	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	151	)))
1.2	152
20.2	153	[[image:image-20220527092748-9.png]]
1.2	154
1.12	155	AT COMMAND
1.2	156
20.2	157
1.8	158	(% class="box infomessage" %)
	159	(((
4.2	160	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	161	)))
1.2	162
	163	a: length for the return of AT+COMMAND
	164
	165	b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
	166
	167	c: define the position for valid value.
	168
20.2	169	[[image:image-20220527092936-10.png]]
1.2	170
	171	AT COMMAND
	172
20.2	173
1.2	174	PAYLOAD is available after the valid value is intercepted.
	175
1.8	176
20.2	177	[[image:image-20220527093059-11.png]]
1.2	178
	179	AT COMMAND
	180
20.2	181
1.2	182	You can get configured PAYLOAD on TTN.
	183
20.2	184	[[image:image-20220527093133-12.png]]
1.8	185
1.12	186	(((
1.2	187	AT COMMAND
1.12	188	)))
1.2	189
1.12	190	(((
1.13	191
	192	)))
	193
	194	(((
1.8	195	Example: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	196	)))
1.2	197
1.12	198	(((
1.2	199	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	200	)))
1.2	201
1.12	202	(((
1.2	203	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.
1.12	204	)))
1.2	205
1.12	206	(((
1.2	207	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	208	)))
1.2	209
1.12	210	(((
1.2	211	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	212	)))
1.2	213
1.12	214	(((
1.2	215	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.
1.12	216	)))
1.2	217
1.12	218	(((
1.2	219	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	220	)))
1.2	221
1.12	222	(((
1.2	223	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	224	)))
1.2	225
1.12	226	(((
1.2	227	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	228	)))
1.2	229
1.12	230	(((
1.2	231	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	232	)))
1.2	233
20.2	234	[[image:image-20220527093204-13.png]]
1.2	235
	236	AT COMMAND
	237
20.2	238
21.2	239	(% 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	240
20.2	241	[[image:image-20220527093251-14.png]]
1.8	242
1.2	243	AT COMMAND
	244
	245
1.8	246	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
	247
21.2	248	[[image:image-20220527093358-15.png]]
1.2	249
1.9	250	(((
1.2	251	DOWNLINK
1.9	252	)))
1.2	253
1.9	254	(((
	255
	256	)))
	257
	258	(((
4.3	259	Type Code 0xAF
1.9	260	)))
1.2	261
1.9	262	(((
4.3	263	(% class="box infomessage" %)
	264	(((
1.2	265	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	266	)))
4.3	267	)))
1.2	268
1.9	269	(((
1.2	270	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	271	)))
1.2	272
1.9	273	(((
1.2	274	Format: AF MM NN LL XX XX XX XX YY
1.9	275	)))
1.2	276
1.9	277	(((
1.2	278	Where:
1.9	279	)))
1.2	280
1.9	281	(((
1.2	282	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	283	)))
1.2	284
1.9	285	(((
1.2	286	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	287	)))
1.2	288
1.9	289	(((
1.2	290	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	291	)))
1.2	292
1.9	293	(((
1.2	294	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	295	)))
1.2	296
1.9	297	(((
1.2	298	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	299	)))
1.2	300
1.9	301	(((
1.2	302	will execute an uplink after got this command.
1.9	303	)))
1.2	304
1.9	305	(((
1.2	306	Example:
1.9	307	)))
1.2	308
1.9	309	(((
1.2	310	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	311	)))
1.2	312
22.2	313	[[image:image-20220527093430-16.png]]
1.2	314
	315	DOWNLINK
	316
1.8	317
24.2	318	[[image:image-20220527093508-17.png]]
1.2	319
	320	DOWNLINK
	321
1.8	322
24.2	323	[[image:image-20220527093530-18.png]]
1.2	324
	325	DOWNLINK
	326
1.8	327
26.2	328	[[image:image-20220527093607-19.png]]
1.2	329
	330	DOWNLINK
	331
1.15	332
26.2	333	[[image:image-20220527093628-20.png]]
1.2	334
	335	DOWNLINK
	336
	337
	338	=== 1.3.4 How to configure and output commands for RS485 to USB ===
	339
1.13	340	(((
1.2	341	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	342	)))
1.2	343
1.13	344	(((
1.2	345	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	346	)))
1.2	347
1.13	348	(((
1.2	349	Open the serial port debugging, set the send and receive to HEX.
1.13	350	)))
1.2	351
1.13	352	(((
1.2	353	Baud rate: 9600
1.13	354	)))
1.2	355
1.13	356	(((
1.2	357	check digit: Even
1.13	358	)))
1.2	359
27.2	360	[[image:image-20220527093708-21.png]]
1.2	361
	362	USB
	363
1.13	364
29.2	365	[[image:image-20220527093747-22.png]]
1.2	366
	367	USB
	368
1.13	369
	370	(((
1.2	371	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	372	)))
1.2	373
1.13	374	(((
	375	Example: input：01 03 00 31 00 02 95 c4
	376	)))
1.2	377
1.13	378	(((
4.6	379	output：01 03 04 00 00 00 42 7A 02
1.13	380	)))
1.2	381
29.2	382	[[image:image-20220527093821-23.png]]
1.2	383
	384	USB
	385
29.2	386
1.2	387	=== 1.3.5 How to configure multiple devices and modify device addresses ===
	388
	389	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.
	390
1.14	391	(((
1.15	392	(((
1.2	393	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	394	)))
1.15	395	)))
1.2	396
30.2	397	[[image:image-20220527093849-24.png]]
1.2	398
30.2	399
1.16	400	Example:These two meters are examples of setting parameters and device addresses.
1.2	401
31.2	402	[[image:image-20220527093950-25.png]]
1.2	403
32.2	404	[[image:image-20220527094028-26.png]]
1.2	405
1.14	406	(((
1.16	407	(((
1.2	408	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	409	)))
1.16	410	)))
1.2	411
1.14	412	(((
1.16	413	(((
1.2	414	We can use AT+CFGDEV to set the device address.
1.14	415	)))
1.16	416	)))
1.2	417
1.14	418	(((
1.16	419	(((
1.2	420	We modify the device address 01 of the first energy meter to 02.
1.14	421	)))
1.16	422	)))
1.2	423
35.2	424	[[image:image-20220527094100-27.png]]
1.2	425
35.2	426	(% class="box infomessage" %)
	427	(((
	428	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	429	)))
1.2	430
	431	* 01:device adaress
	432
	433	* 10:function code
	434
	435	* 00 61：Register address
	436
	437	* 00 01：Number of Registers
	438
	439	* 02：Number of bytes
	440
	441	* 00 02：Modified device address
	442
	443	* 1：Check code
	444
	445	The device address setting of the energy meter is complete.
	446
	447	Another energy meter is a single active energy meter with a floating-point format.
	448
	449	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	450
35.2	451	[[image:image-20220527094150-28.png]]
1.2	452
	453
35.2	454	[[image:image-20220527094224-29.png]]
	455
1.2	456	PAYLOAD:01 08 DF 43 62
	457
	458	* 08 DF is the valid value of the meter with device address 02.
	459	* 43 62 is the valid value of the meter with device address 01.
	460
	461	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	462
	463	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:
	464
36.2	465	[[image:image-20220527094330-30.png]]
1.2	466
	467	Connection
	468
	469	* [[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
	470
	471	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	472
	473	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:
	474
	475	* [[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
	476
	477	* [[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
	478
	479	== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
	480
	481	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:
	482
	483	* [[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
	484
	485	== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
	486
38.1	487	[[image:image-20220527094556-31.png]]
1.2	488
	489	Network Structure
	490
	491	* [[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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