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

Version 2.1 by Xiaoling on 2022/05/12 10:42

version	line-number	content
1.2	1	= 1. Introduction =
1.1	2
1.2	3	This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
1.1	4
1.2	5	== 1.1 Example 1: Connect to Leak relay and VFD ==
1.1	6
1.2	7	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	8
1.3	9	[[image:https://wiki.dragino.com/images/thumb/5/5c/RS485_01.png/600px-RS485_01.png\|\|height="297" width="534"]]
1.1	10
1.2	11	Connection
1.1	12
1.18	13
1.3	14	[[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	15
1.2	16	Connection
1.1	17
1.2	18	Related documents:
1.1	19
1.2	20	* [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
	21	* [[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.
	22	* [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
1.1	23
1.2	24	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	25
1.2	26	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	27
1.2	28	[[image:https://wiki.dragino.com/images/thumb/3/34/RS485_02_1.png/600px-RS485_02_1.png\|\|height="364" width="600"]]
1.1	29
1.2	30	Connection
1.1	31
1.18	32
1.2	33	[[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png\|\|height="337" width="600"]]
	34
	35	Connection
	36
	37	* [[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
	38	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	39
	40	== 1.3 Example3: Use RS485-LN with energy meters ==
	41
	42	=== 1.3.1 OverView ===
	43
1.5	44	(((
1.6	45	Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	46	)))
1.2	47
1.5	48	(((
1.2	49	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	50	)))
1.2	51
1.11	52	[[image:https://wiki.dragino.com/images/thumb/f/f4/Meter1.jpg/600px-Meter1.jpg\|\|height="726" width="545"]]
1.2	53
	54	Connection1
	55
1.19	56	(((
1.2	57	How to connect with Energy Meter：
1.19	58	)))
1.2	59
1.19	60	(((
1.2	61	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	62	)))
1.2	63
1.19	64	(((
1.2	65	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	66	)))
1.2	67
1.19	68	(((
1.2	69	Power Source VIN to RS485-LN VIN+
1.19	70	)))
1.2	71
1.19	72	(((
1.2	73	Power Source GND to RS485-LN VIN-
1.19	74	)))
1.2	75
1.19	76	(((
1.2	77	Once there is power, the RS485-LN will be on.
1.19	78	)))
1.2	79
1.11	80	[[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg\|\|height="433" width="577"]]
1.2	81
	82	Connection2
	83
	84
1.15	85	[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg\|\|height="712" width="534"]]
1.12	86
1.2	87	Connection3
	88
	89
	90	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
	91
1.7	92	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	93
	94	[[image:https://wiki.dragino.com/images/thumb/3/35/Meter4.png/600px-Meter4.png\|\|alt="Meter4.png" height="193" width="600"]]
	95
1.8	96	(% class="box infomessage" %)
	97	(((
1.2	98	Example:AT+COMMAND1=01 03 00 00 00 01 84 0A
1.8	99	)))
1.2	100
	101	* The first byte : slave address code (=001～247)
	102	* The second byte : read register value function code
	103	* 3rd and 4th bytes: start address of register to be read
	104	* 5th and 6th bytes: Number of registers to read
	105	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	106
1.12	107	(((
1.2	108	How to parse the reading of the return command of the parameter：
1.12	109	)))
1.2	110
1.8	111	(% class="box infomessage" %)
	112	(((
1.2	113	Example:RETURN1：01 03 02 08 FD 7E 05
1.8	114	)))
1.2	115
	116	* The first byte ARD: slave address code (=001～254)
	117	* The second byte: Return to read function code
	118	* 3rd byte: total number of bytes
	119	* 4th～5th bytes: register data
	120	* The 6th and 7th bytes: CRC16 checksum
	121	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	122
	123	=== 1.3.3 How to configure RS485-LN and parse output commands ===
	124
	125	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	126
1.8	127	==== 1.3.3.1 via AT COMMAND: ====
1.2	128
1.8	129	First, we can use AT+CFGDEV to get the return value, and we can also judge whether the input parameters are correct.
1.2	130
1.8	131	(((
1.2	132	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	133	)))
1.2	134
	135	[[image:https://wiki.dragino.com/images/b/bc/AT_COMMAND1.png\|\|height="358" width="456"]]
	136
1.12	137	AT COMMAND
1.2	138
1.8	139	(% class="box infomessage" %)
	140	(((
1.21	141	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	142	)))
1.2	143
	144	a: length for the return of AT+COMMAND
	145
	146	b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
	147
	148	c: define the position for valid value.
	149
	150	[[image:https://wiki.dragino.com/images/7/7d/AT_COMMAND2.png\|\|height="278" width="477"]]
	151
	152	AT COMMAND
	153
	154	PAYLOAD is available after the valid value is intercepted.
	155
1.8	156
1.2	157	[[image:https://wiki.dragino.com/images/3/3a/AT_COMMAND4.png\|\|height="219" width="576"]]
	158
	159	AT COMMAND
	160
	161	You can get configured PAYLOAD on TTN.
	162
1.8	163
1.2	164	[[image:https://wiki.dragino.com/images/thumb/c/c2/AT_COMMAND3.png/600px-AT_COMMAND3.png\|\|height="138" width="600"]]
	165
1.12	166	(((
1.2	167	AT COMMAND
1.12	168	)))
1.2	169
1.12	170	(((
1.13	171
	172	)))
	173
	174	(((
1.8	175	Example: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	176	)))
1.2	177
1.12	178	(((
1.2	179	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	180	)))
1.2	181
1.12	182	(((
1.2	183	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	184	)))
1.2	185
1.12	186	(((
1.2	187	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	188	)))
1.2	189
1.12	190	(((
1.2	191	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	192	)))
1.2	193
1.12	194	(((
1.2	195	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	196	)))
1.2	197
1.12	198	(((
1.2	199	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	200	)))
1.2	201
1.12	202	(((
1.2	203	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	204	)))
1.2	205
1.12	206	(((
1.2	207	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	208	)))
1.2	209
1.12	210	(((
1.2	211	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	212	)))
1.2	213
	214	[[image:https://wiki.dragino.com/images/thumb/9/9b/AT_COMMAND10.png/600px-AT_COMMAND10.png\|\|height="278" width="600"]]
	215
	216	AT COMMAND
	217
	218	01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.
	219
1.8	220
1.2	221	[[~[~[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]]
	222
	223	AT COMMAND
	224
	225
1.8	226	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
	227
1.2	228	[[image:https://wiki.dragino.com/images/thumb/f/fc/DOWNLINK_METER1.png/600px-DOWNLINK_METER1.png\|\|height="423" width="600"]]
	229
1.9	230	(((
1.2	231	DOWNLINK
1.9	232	)))
1.2	233
1.9	234	(((
	235
	236	)))
	237
	238	(((
1.2	239	Type Code 0xAF
1.9	240	)))
1.2	241
1.9	242	(((
1.2	243	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	244	)))
1.2	245
1.9	246	(((
1.2	247	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	248	)))
1.2	249
1.9	250	(((
1.2	251	Format: AF MM NN LL XX XX XX XX YY
1.9	252	)))
1.2	253
1.9	254	(((
1.2	255	Where:
1.9	256	)))
1.2	257
1.9	258	(((
1.2	259	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	260	)))
1.2	261
1.9	262	(((
1.2	263	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	264	)))
1.2	265
1.9	266	(((
1.2	267	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	268	)))
1.2	269
1.9	270	(((
1.2	271	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	272	)))
1.2	273
1.9	274	(((
1.2	275	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	276	)))
1.2	277
1.9	278	(((
1.2	279	will execute an uplink after got this command.
1.9	280	)))
1.2	281
1.9	282	(((
1.2	283	Example:
1.9	284	)))
1.2	285
1.9	286	(((
1.2	287	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	288	)))
1.2	289
	290	[[image:https://wiki.dragino.com/images/thumb/4/45/DOWNLINK_METER2.png/600px-DOWNLINK_METER2.png\|\|height="208" width="600"]]
	291
	292	DOWNLINK
	293
1.8	294
1.2	295	[[~[~[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]]
	296
	297	DOWNLINK
	298
1.8	299
1.2	300	[[image:https://wiki.dragino.com/images/thumb/2/27/DOWNLINK_METER4.png/600px-DOWNLINK_METER4.png\|\|height="210" width="600"]]
	301
	302	DOWNLINK
	303
1.8	304
1.2	305	[[~[~[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]]
	306
	307	DOWNLINK
	308
1.15	309
1.2	310	[[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png\|\|height="365" width="600"]]
	311
	312	DOWNLINK
	313
	314
	315	=== 1.3.4 How to configure and output commands for RS485 to USB ===
	316
1.13	317	(((
1.2	318	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	319	)))
1.2	320
1.13	321	(((
1.2	322	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	323	)))
1.2	324
1.13	325	(((
1.2	326	Open the serial port debugging, set the send and receive to HEX.
1.13	327	)))
1.2	328
1.13	329	(((
1.2	330	Baud rate: 9600
1.13	331	)))
1.2	332
1.13	333	(((
1.2	334	check digit: Even
1.13	335	)))
1.2	336
1.15	337	[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg\|\|height="725" width="544"]]
1.2	338
	339	USB
	340
1.13	341
1.15	342	[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg\|\|height="728" width="546"]]
1.2	343
	344	USB
	345
1.13	346
	347	(((
1.2	348	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	349	)))
1.2	350
1.13	351	(((
	352	Example: input：01 03 00 31 00 02 95 c4
	353	)))
1.2	354
1.13	355	(((
	356	output:01 03 04 00 00 00 42 7A 02
	357	)))
1.2	358
	359	[[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg\|\|height="466" width="600"]]
	360
	361	USB
	362
	363	=== 1.3.5 How to configure multiple devices and modify device addresses ===
	364
	365	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.
	366
1.14	367	(((
1.15	368	(((
1.2	369	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	370	)))
1.15	371	)))
1.2	372
	373	[[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png\|\|alt="Double meter3.png" height="83" width="600"]]
	374
1.16	375	Example:These two meters are examples of setting parameters and device addresses.
1.2	376
1.16	377	[[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	378
1.14	379	[[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	380
1.14	381	(((
1.16	382	(((
1.2	383	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	384	)))
1.16	385	)))
1.2	386
1.14	387	(((
1.16	388	(((
1.2	389	We can use AT+CFGDEV to set the device address.
1.14	390	)))
1.16	391	)))
1.2	392
1.14	393	(((
1.16	394	(((
1.2	395	We modify the device address 01 of the first energy meter to 02.
1.14	396	)))
1.16	397	)))
1.2	398
	399	[[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png\|\|alt="Double meter4.png" height="141" width="456"]]
	400
	401	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	402
	403	* 01:device adaress
	404
	405	* 10:function code
	406
	407	* 00 61：Register address
	408
	409	* 00 01：Number of Registers
	410
	411	* 02：Number of bytes
	412
	413	* 00 02：Modified device address
	414
	415	* 1：Check code
	416
	417	The device address setting of the energy meter is complete.
	418
	419	Another energy meter is a single active energy meter with a floating-point format.
	420
	421	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	422
	423	[[image:https://wiki.dragino.com/images/1/13/Meter11.png\|\|alt="Meter11.png" height="576" width="379"]]
	424
	425	[[image:https://wiki.dragino.com/images/thumb/7/7e/Meter12.png/600px-Meter12.png\|\|alt="Meter12.png" height="262" width="600"]]
	426
	427	PAYLOAD:01 08 DF 43 62
	428
	429	* 08 DF is the valid value of the meter with device address 02.
	430	* 43 62 is the valid value of the meter with device address 01.
	431
	432	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	433
	434	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:
	435
	436	[[image:https://wiki.dragino.com/images/thumb/f/fa/RS485_04_2.png/600px-RS485_04_2.png\|\|height="336" width="600"]]
	437
	438	Connection
	439
	440	* [[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
	441
	442	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	443
	444	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:
	445
	446	* [[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
	447
	448	* [[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
	449
	450	== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with 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-LN to connect to CEM C31 485-T1-MID and send the data for remote minitor. The structure is like below:
	453
	454	* [[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
	455
	456	== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
	457
	458	[[image:https://wiki.dragino.com/images/thumb/9/97/PLC_M221.png/600px-PLC_M221.png\|\|height="353" width="600"]]
	459
	460	Network Structure
	461
	462	* [[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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