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

Version 41.21 by Xiaoling on 2022/06/01 14:16

version	line-number	content
6.2	1	(% class="wikigeneratedid" %)
	2	Contents:
	3
	4	{{toc/}}
	5
41.2	6
	7
	8
	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
41.13	76
1.19	77	(((
1.2	78	How to connect with Energy Meter：
1.19	79	)))
1.2	80
1.19	81	(((
1.2	82	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	83	)))
1.2	84
1.19	85	(((
1.2	86	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	87	)))
1.2	88
1.19	89	(((
1.2	90	Power Source VIN to RS485-LN VIN+
1.19	91	)))
1.2	92
1.19	93	(((
1.2	94	Power Source GND to RS485-LN VIN-
1.19	95	)))
1.2	96
1.19	97	(((
1.2	98	Once there is power, the RS485-LN will be on.
1.19	99	)))
1.2	100
13.2	101	[[image:image-20220527092514-6.png]]
1.2	102
	103	Connection2
	104
	105
41.14	106
20.2	107	[[image:image-20220527092555-7.png]]
1.12	108
1.2	109	Connection3
	110
	111
41.7	112	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	113
1.7	114	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	115
20.2	116	[[image:image-20220527092629-8.png]]
1.2	117
20.2	118
1.8	119	(% class="box infomessage" %)
	120	(((
20.2	121	Example: AT+COMMAND1=01 03 00 00 00 01 84 0A
1.8	122	)))
1.2	123
	124	* The first byte : slave address code (=001～247)
	125	* The second byte : read register value function code
	126	* 3rd and 4th bytes: start address of register to be read
	127	* 5th and 6th bytes: Number of registers to read
	128	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	129
1.12	130	(((
1.2	131	How to parse the reading of the return command of the parameter：
1.12	132	)))
1.2	133
1.8	134	(% class="box infomessage" %)
	135	(((
20.2	136	Example: RETURN1：01 03 02 08 FD 7E 05
1.8	137	)))
1.2	138
	139	* The first byte ARD: slave address code (=001～254)
	140	* The second byte: Return to read function code
	141	* 3rd byte: total number of bytes
	142	* 4th～5th bytes: register data
	143	* The 6th and 7th bytes: CRC16 checksum
	144	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	145
20.2	146	(% class="wikigeneratedid" %)
	147	(((
	148
	149	)))
	150
41.2	151	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	152
	153	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	154
20.2	155
41.2	156	==== 1.3.3.1 via AT COMMAND: ====
1.2	157
1.8	158	First, we can use AT+CFGDEV to get the return value, and we can also judge whether the input parameters are correct.
1.2	159
1.8	160	(((
1.2	161	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	162	)))
1.2	163
20.2	164	[[image:image-20220527092748-9.png]]
1.2	165
1.12	166	AT COMMAND
1.2	167
20.2	168
1.8	169	(% class="box infomessage" %)
	170	(((
4.2	171	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	172	)))
1.2	173
41.15	174	a: length for the return of AT+COMMAND
1.2	175
41.15	176	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	177
41.15	178	c: define the position for valid value.
1.2	179
20.2	180	[[image:image-20220527092936-10.png]]
1.2	181
	182	AT COMMAND
	183
20.2	184
41.15	185
1.2	186	PAYLOAD is available after the valid value is intercepted.
	187
1.8	188
20.2	189	[[image:image-20220527093059-11.png]]
1.2	190
	191	AT COMMAND
	192
20.2	193
41.16	194
1.2	195	You can get configured PAYLOAD on TTN.
	196
20.2	197	[[image:image-20220527093133-12.png]]
1.8	198
1.12	199	(((
1.2	200	AT COMMAND
1.12	201	)))
1.2	202
1.12	203	(((
1.13	204
	205	)))
	206
	207	(((
39.4	208	(% style="color:#4f81bd" %)Example:
39.3	209
	210	CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	211	)))
1.2	212
1.12	213	(((
1.2	214	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	215	)))
1.2	216
1.12	217	(((
1.2	218	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	219
	220
1.12	221	)))
1.2	222
1.12	223	(((
1.2	224	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	225	)))
1.2	226
1.12	227	(((
1.2	228	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	229	)))
1.2	230
1.12	231	(((
1.2	232	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	233
	234
1.12	235	)))
1.2	236
1.12	237	(((
1.2	238	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	239	)))
1.2	240
1.12	241	(((
1.2	242	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	243	)))
1.2	244
1.12	245	(((
1.2	246	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	247	)))
1.2	248
1.12	249	(((
1.2	250	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	251	)))
1.2	252
20.2	253	[[image:image-20220527093204-13.png]]
1.2	254
	255	AT COMMAND
	256
20.2	257
21.2	258	(% 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	259
41.17	260
	261
20.2	262	[[image:image-20220527093251-14.png]]
1.8	263
1.2	264	AT COMMAND
	265
	266
41.2	267	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	268
21.2	269	[[image:image-20220527093358-15.png]]
1.2	270
1.9	271	(((
1.2	272	DOWNLINK
1.9	273	)))
1.2	274
1.9	275	(((
	276
	277	)))
	278
	279	(((
39.4	280	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	281	)))
1.2	282
1.9	283	(((
4.3	284	(% class="box infomessage" %)
	285	(((
1.2	286	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	287	)))
4.3	288	)))
1.2	289
1.9	290	(((
1.2	291	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	292	)))
1.2	293
1.9	294	(((
1.2	295	Format: AF MM NN LL XX XX XX XX YY
1.9	296	)))
1.2	297
1.9	298	(((
1.2	299	Where:
1.9	300	)))
1.2	301
1.9	302	(((
1.2	303	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	304	)))
1.2	305
1.9	306	(((
1.2	307	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	308	)))
1.2	309
1.9	310	(((
1.2	311	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	312	)))
1.2	313
1.9	314	(((
1.2	315	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	316	)))
1.2	317
1.9	318	(((
1.2	319	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	320	)))
1.2	321
1.9	322	(((
1.2	323	will execute an uplink after got this command.
1.9	324	)))
1.2	325
1.9	326	(((
41.18	327
	328
39.4	329	(% style="color:#4f81bd" %)Example:
1.9	330	)))
1.2	331
1.9	332	(((
39.4	333	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	334	)))
1.2	335
22.2	336	[[image:image-20220527093430-16.png]]
1.2	337
	338	DOWNLINK
	339
1.8	340
41.19	341
24.2	342	[[image:image-20220527093508-17.png]]
1.2	343
	344	DOWNLINK
	345
1.8	346
41.20	347
24.2	348	[[image:image-20220527093530-18.png]]
1.2	349
	350	DOWNLINK
	351
1.8	352
41.21	353
26.2	354	[[image:image-20220527093607-19.png]]
1.2	355
	356	DOWNLINK
	357
1.15	358
26.2	359	[[image:image-20220527093628-20.png]]
1.2	360
	361	DOWNLINK
	362
	363
41.2	364	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	365
1.13	366	(((
1.2	367	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	368	)))
1.2	369
1.13	370	(((
1.2	371	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	372	)))
1.2	373
1.13	374	(((
1.2	375	Open the serial port debugging, set the send and receive to HEX.
1.13	376	)))
1.2	377
1.13	378	(((
1.2	379	Baud rate: 9600
1.13	380	)))
1.2	381
1.13	382	(((
1.2	383	check digit: Even
1.13	384	)))
1.2	385
27.2	386	[[image:image-20220527093708-21.png]]
1.2	387
	388	USB
	389
1.13	390
29.2	391	[[image:image-20220527093747-22.png]]
1.2	392
	393	USB
	394
1.13	395
	396	(((
1.2	397	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	398	)))
1.2	399
1.13	400	(((
39.4	401	(% style="color:#4f81bd" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	402	)))
1.2	403
1.13	404	(((
4.6	405	output：01 03 04 00 00 00 42 7A 02
1.13	406	)))
1.2	407
29.2	408	[[image:image-20220527093821-23.png]]
1.2	409
	410	USB
	411
29.2	412
41.2	413	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	414
	415	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.
	416
1.14	417	(((
1.15	418	(((
1.2	419	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	420	)))
1.15	421	)))
1.2	422
30.2	423	[[image:image-20220527093849-24.png]]
1.2	424
30.2	425
1.16	426	Example:These two meters are examples of setting parameters and device addresses.
1.2	427
31.2	428	[[image:image-20220527093950-25.png]]
1.2	429
32.2	430	[[image:image-20220527094028-26.png]]
1.2	431
1.14	432	(((
1.16	433	(((
1.2	434	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	435	)))
1.16	436	)))
1.2	437
1.14	438	(((
1.16	439	(((
1.2	440	We can use AT+CFGDEV to set the device address.
1.14	441	)))
1.16	442	)))
1.2	443
1.14	444	(((
1.16	445	(((
1.2	446	We modify the device address 01 of the first energy meter to 02.
1.14	447	)))
1.16	448	)))
1.2	449
35.2	450	[[image:image-20220527094100-27.png]]
1.2	451
35.2	452	(% class="box infomessage" %)
	453	(((
	454	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	455	)))
1.2	456
	457	* 01:device adaress
	458
	459	* 10:function code
	460
	461	* 00 61：Register address
	462
	463	* 00 01：Number of Registers
	464
	465	* 02：Number of bytes
	466
	467	* 00 02：Modified device address
	468
	469	* 1：Check code
	470
	471	The device address setting of the energy meter is complete.
	472
	473	Another energy meter is a single active energy meter with a floating-point format.
	474
	475	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	476
35.2	477	[[image:image-20220527094150-28.png]]
1.2	478
	479
35.2	480	[[image:image-20220527094224-29.png]]
	481
39.5	482	PAYLOAD:01 08 DF 43 62
1.2	483
	484	* 08 DF is the valid value of the meter with device address 02.
	485	* 43 62 is the valid value of the meter with device address 01.
	486
39.5	487
1.2	488	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	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-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:
	491
36.2	492	[[image:image-20220527094330-30.png]]
1.2	493
	494	Connection
	495
	496	* [[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
	497
41.9	498
1.2	499	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	500
	501	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:
	502
	503	* [[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
	504
	505	* [[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
	506
	507	== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
	508
	509	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:
	510
	511	* [[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
	512
	513	== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
	514
38.1	515	[[image:image-20220527094556-31.png]]
1.2	516
	517	Network Structure
	518
	519	* [[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

Applications

Navigation