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

Version 8.1 by Xiaoling on 2022/05/27 09:19

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
1.2	10	== 1.1 Example 1: Connect to Leak relay and VFD ==
1.1	11
1.2	12	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	13
1.3	14	[[image:https://wiki.dragino.com/images/thumb/5/5c/RS485_01.png/600px-RS485_01.png\|\|height="297" width="534"]]
1.1	15
1.2	16	Connection
1.1	17
1.18	18
1.3	19	[[image:https://wiki.dragino.com/images/thumb/f/f2/RS485_02.png/600px-RS485_02.png\|\|height="743" width="528"]](% style="display:none" %)
1.1	20
1.2	21	Connection
1.1	22
1.2	23	Related documents:
1.1	24
1.2	25	* [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
	26	* [[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.
	27	* [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
1.1	28
1.2	29	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	30
1.2	31	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	32
1.2	33	[[image:https://wiki.dragino.com/images/thumb/3/34/RS485_02_1.png/600px-RS485_02_1.png\|\|height="364" width="600"]]
1.1	34
1.2	35	Connection
1.1	36
1.18	37
1.2	38	[[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png\|\|height="337" width="600"]]
	39
	40	Connection
	41
	42	* [[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
	43	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	44
	45	== 1.3 Example3: Use RS485-LN with energy meters ==
	46
	47	=== 1.3.1 OverView ===
	48
1.5	49	(((
1.6	50	Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	51	)))
1.2	52
1.5	53	(((
1.2	54	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	55	)))
1.2	56
1.11	57	[[image:https://wiki.dragino.com/images/thumb/f/f4/Meter1.jpg/600px-Meter1.jpg\|\|height="726" width="545"]]
1.2	58
	59	Connection1
	60
1.19	61	(((
1.2	62	How to connect with Energy Meter：
1.19	63	)))
1.2	64
1.19	65	(((
1.2	66	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	67	)))
1.2	68
1.19	69	(((
1.2	70	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	71	)))
1.2	72
1.19	73	(((
1.2	74	Power Source VIN to RS485-LN VIN+
1.19	75	)))
1.2	76
1.19	77	(((
1.2	78	Power Source GND to RS485-LN VIN-
1.19	79	)))
1.2	80
1.19	81	(((
1.2	82	Once there is power, the RS485-LN will be on.
1.19	83	)))
1.2	84
1.11	85	[[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg\|\|height="433" width="577"]]
1.2	86
	87	Connection2
	88
	89
1.15	90	[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg\|\|height="712" width="534"]]
1.12	91
1.2	92	Connection3
	93
	94
	95	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
	96
1.7	97	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	98
	99	[[image:https://wiki.dragino.com/images/thumb/3/35/Meter4.png/600px-Meter4.png\|\|alt="Meter4.png" height="193" width="600"]]
	100
1.8	101	(% class="box infomessage" %)
	102	(((
1.2	103	Example:AT+COMMAND1=01 03 00 00 00 01 84 0A
1.8	104	)))
1.2	105
	106	* The first byte : slave address code (=001～247)
	107	* The second byte : read register value function code
	108	* 3rd and 4th bytes: start address of register to be read
	109	* 5th and 6th bytes: Number of registers to read
	110	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	111
1.12	112	(((
1.2	113	How to parse the reading of the return command of the parameter：
1.12	114	)))
1.2	115
1.8	116	(% class="box infomessage" %)
	117	(((
1.2	118	Example:RETURN1：01 03 02 08 FD 7E 05
1.8	119	)))
1.2	120
	121	* The first byte ARD: slave address code (=001～254)
	122	* The second byte: Return to read function code
	123	* 3rd byte: total number of bytes
	124	* 4th～5th bytes: register data
	125	* The 6th and 7th bytes: CRC16 checksum
	126	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	127
	128	=== 1.3.3 How to configure RS485-LN and parse output commands ===
	129
	130	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	131
1.8	132	==== 1.3.3.1 via AT COMMAND: ====
1.2	133
1.8	134	First, we can use AT+CFGDEV to get the return value, and we can also judge whether the input parameters are correct.
1.2	135
1.8	136	(((
1.2	137	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	138	)))
1.2	139
	140	[[image:https://wiki.dragino.com/images/b/bc/AT_COMMAND1.png\|\|height="358" width="456"]]
	141
1.12	142	AT COMMAND
1.2	143
1.8	144	(% class="box infomessage" %)
	145	(((
4.2	146	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	147	)))
1.2	148
	149	a: length for the return of AT+COMMAND
	150
	151	b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
	152
	153	c: define the position for valid value.
	154
	155	[[image:https://wiki.dragino.com/images/7/7d/AT_COMMAND2.png\|\|height="278" width="477"]]
	156
	157	AT COMMAND
	158
	159	PAYLOAD is available after the valid value is intercepted.
	160
1.8	161
1.2	162	[[image:https://wiki.dragino.com/images/3/3a/AT_COMMAND4.png\|\|height="219" width="576"]]
	163
	164	AT COMMAND
	165
	166	You can get configured PAYLOAD on TTN.
	167
1.8	168
1.2	169	[[image:https://wiki.dragino.com/images/thumb/c/c2/AT_COMMAND3.png/600px-AT_COMMAND3.png\|\|height="138" width="600"]]
	170
1.12	171	(((
1.2	172	AT COMMAND
1.12	173	)))
1.2	174
1.12	175	(((
1.13	176
	177	)))
	178
	179	(((
1.8	180	Example: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	181	)))
1.2	182
1.12	183	(((
1.2	184	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	185	)))
1.2	186
1.12	187	(((
1.2	188	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	189	)))
1.2	190
1.12	191	(((
1.2	192	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	193	)))
1.2	194
1.12	195	(((
1.2	196	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	197	)))
1.2	198
1.12	199	(((
1.2	200	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	201	)))
1.2	202
1.12	203	(((
1.2	204	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	205	)))
1.2	206
1.12	207	(((
1.2	208	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	209	)))
1.2	210
1.12	211	(((
1.2	212	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	213	)))
1.2	214
1.12	215	(((
1.2	216	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	217	)))
1.2	218
	219	[[image:https://wiki.dragino.com/images/thumb/9/9b/AT_COMMAND10.png/600px-AT_COMMAND10.png\|\|height="278" width="600"]]
	220
	221	AT COMMAND
	222
	223	01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.
	224
1.8	225
1.2	226	[[~[~[image:https://wiki.dragino.com/images/thumb/b/b8/AT_COMMAND11.png/600px-AT_COMMAND11.png~\|~\|height="271" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:AT_COMMAND11.png]]
	227
	228	AT COMMAND
	229
	230
1.8	231	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
	232
4.2	233	[[image:image-20220512104358-3.png]]
1.2	234
1.9	235	(((
1.2	236	DOWNLINK
1.9	237	)))
1.2	238
1.9	239	(((
	240
	241	)))
	242
	243	(((
4.3	244	Type Code 0xAF
1.9	245	)))
1.2	246
1.9	247	(((
4.3	248	(% class="box infomessage" %)
	249	(((
1.2	250	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	251	)))
4.3	252	)))
1.2	253
1.9	254	(((
1.2	255	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	256	)))
1.2	257
1.9	258	(((
1.2	259	Format: AF MM NN LL XX XX XX XX YY
1.9	260	)))
1.2	261
1.9	262	(((
1.2	263	Where:
1.9	264	)))
1.2	265
1.9	266	(((
1.2	267	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	268	)))
1.2	269
1.9	270	(((
1.2	271	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	272	)))
1.2	273
1.9	274	(((
1.2	275	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	276	)))
1.2	277
1.9	278	(((
1.2	279	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	280	)))
1.2	281
1.9	282	(((
1.2	283	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	284	)))
1.2	285
1.9	286	(((
1.2	287	will execute an uplink after got this command.
1.9	288	)))
1.2	289
1.9	290	(((
1.2	291	Example:
1.9	292	)))
1.2	293
1.9	294	(((
1.2	295	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	296	)))
1.2	297
	298	[[image:https://wiki.dragino.com/images/thumb/4/45/DOWNLINK_METER2.png/600px-DOWNLINK_METER2.png\|\|height="208" width="600"]]
	299
	300	DOWNLINK
	301
1.8	302
1.2	303	[[~[~[image:https://wiki.dragino.com/images/thumb/2/20/DOWNLINK_METER3.png/600px-DOWNLINK_METER3.png~\|~\|height="105" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:DOWNLINK_METER3.png]]
	304
	305	DOWNLINK
	306
1.8	307
1.2	308	[[image:https://wiki.dragino.com/images/thumb/2/27/DOWNLINK_METER4.png/600px-DOWNLINK_METER4.png\|\|height="210" width="600"]]
	309
	310	DOWNLINK
	311
1.8	312
1.2	313	[[~[~[image:https://wiki.dragino.com/images/thumb/3/39/DOWNLINK_METER5.png/600px-DOWNLINK_METER5.png~\|~\|height="176" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:DOWNLINK_METER5.png]]
	314
	315	DOWNLINK
	316
1.15	317
1.2	318	[[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png\|\|height="365" width="600"]]
	319
	320	DOWNLINK
	321
	322
	323	=== 1.3.4 How to configure and output commands for RS485 to USB ===
	324
1.13	325	(((
1.2	326	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	327	)))
1.2	328
1.13	329	(((
1.2	330	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	331	)))
1.2	332
1.13	333	(((
1.2	334	Open the serial port debugging, set the send and receive to HEX.
1.13	335	)))
1.2	336
1.13	337	(((
1.2	338	Baud rate: 9600
1.13	339	)))
1.2	340
1.13	341	(((
1.2	342	check digit: Even
1.13	343	)))
1.2	344
1.15	345	[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg\|\|height="725" width="544"]]
1.2	346
	347	USB
	348
1.13	349
1.15	350	[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg\|\|height="728" width="546"]]
1.2	351
	352	USB
	353
1.13	354
	355	(((
1.2	356	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	357	)))
1.2	358
1.13	359	(((
	360	Example: input：01 03 00 31 00 02 95 c4
	361	)))
1.2	362
1.13	363	(((
4.6	364	output：01 03 04 00 00 00 42 7A 02
1.13	365	)))
1.2	366
	367	[[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg\|\|height="466" width="600"]]
	368
	369	USB
	370
	371	=== 1.3.5 How to configure multiple devices and modify device addresses ===
	372
	373	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.
	374
1.14	375	(((
1.15	376	(((
1.2	377	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	378	)))
1.15	379	)))
1.2	380
	381	[[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png\|\|alt="Double meter3.png" height="83" width="600"]]
	382
1.16	383	Example:These two meters are examples of setting parameters and device addresses.
1.2	384
1.16	385	[[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg\|\|alt="Double meter1.jpg" height="737" width="553"]]
1.2	386
1.14	387	[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg\|\|alt="Double meter2.jpg" height="733" width="550"]]
1.2	388
1.14	389	(((
1.16	390	(((
1.2	391	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	392	)))
1.16	393	)))
1.2	394
1.14	395	(((
1.16	396	(((
1.2	397	We can use AT+CFGDEV to set the device address.
1.14	398	)))
1.16	399	)))
1.2	400
1.14	401	(((
1.16	402	(((
1.2	403	We modify the device address 01 of the first energy meter to 02.
1.14	404	)))
1.16	405	)))
1.2	406
	407	[[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png\|\|alt="Double meter4.png" height="141" width="456"]]
	408
	409	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	410
	411	* 01:device adaress
	412
	413	* 10:function code
	414
	415	* 00 61：Register address
	416
	417	* 00 01：Number of Registers
	418
	419	* 02：Number of bytes
	420
	421	* 00 02：Modified device address
	422
	423	* 1：Check code
	424
	425	The device address setting of the energy meter is complete.
	426
	427	Another energy meter is a single active energy meter with a floating-point format.
	428
	429	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	430
	431	[[image:https://wiki.dragino.com/images/1/13/Meter11.png\|\|alt="Meter11.png" height="576" width="379"]]
	432
	433	[[image:https://wiki.dragino.com/images/thumb/7/7e/Meter12.png/600px-Meter12.png\|\|alt="Meter12.png" height="262" width="600"]]
	434
	435	PAYLOAD:01 08 DF 43 62
	436
	437	* 08 DF is the valid value of the meter with device address 02.
	438	* 43 62 is the valid value of the meter with device address 01.
	439
	440	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	441
	442	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:
	443
	444	[[image:https://wiki.dragino.com/images/thumb/f/fa/RS485_04_2.png/600px-RS485_04_2.png\|\|height="336" width="600"]]
	445
	446	Connection
	447
	448	* [[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
	449
	450	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	451
	452	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:
	453
	454	* [[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
	455
	456	* [[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
	457
	458	== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
	459
	460	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:
	461
	462	* [[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
	463
	464	== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
	465
	466	[[image:https://wiki.dragino.com/images/thumb/9/97/PLC_M221.png/600px-PLC_M221.png\|\|height="353" width="600"]]
	467
	468	Network Structure
	469
	470	* [[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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