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

Version 41.16 by Xiaoling on 2022/06/01 14:15

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
20.2	260	[[image:image-20220527093251-14.png]]
1.8	261
1.2	262	AT COMMAND
	263
	264
41.2	265	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	266
21.2	267	[[image:image-20220527093358-15.png]]
1.2	268
1.9	269	(((
1.2	270	DOWNLINK
1.9	271	)))
1.2	272
1.9	273	(((
	274
	275	)))
	276
	277	(((
39.4	278	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	279	)))
1.2	280
1.9	281	(((
4.3	282	(% class="box infomessage" %)
	283	(((
1.2	284	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	285	)))
4.3	286	)))
1.2	287
1.9	288	(((
1.2	289	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	290	)))
1.2	291
1.9	292	(((
1.2	293	Format: AF MM NN LL XX XX XX XX YY
1.9	294	)))
1.2	295
1.9	296	(((
1.2	297	Where:
1.9	298	)))
1.2	299
1.9	300	(((
1.2	301	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	302	)))
1.2	303
1.9	304	(((
1.2	305	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	306	)))
1.2	307
1.9	308	(((
1.2	309	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	310	)))
1.2	311
1.9	312	(((
1.2	313	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	314	)))
1.2	315
1.9	316	(((
1.2	317	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	318	)))
1.2	319
1.9	320	(((
1.2	321	will execute an uplink after got this command.
1.9	322	)))
1.2	323
1.9	324	(((
39.4	325	(% style="color:#4f81bd" %)Example:
1.9	326	)))
1.2	327
1.9	328	(((
39.4	329	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	330	)))
1.2	331
22.2	332	[[image:image-20220527093430-16.png]]
1.2	333
	334	DOWNLINK
	335
1.8	336
24.2	337	[[image:image-20220527093508-17.png]]
1.2	338
	339	DOWNLINK
	340
1.8	341
24.2	342	[[image:image-20220527093530-18.png]]
1.2	343
	344	DOWNLINK
	345
1.8	346
26.2	347	[[image:image-20220527093607-19.png]]
1.2	348
	349	DOWNLINK
	350
1.15	351
26.2	352	[[image:image-20220527093628-20.png]]
1.2	353
	354	DOWNLINK
	355
	356
41.2	357	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	358
1.13	359	(((
1.2	360	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	361	)))
1.2	362
1.13	363	(((
1.2	364	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	365	)))
1.2	366
1.13	367	(((
1.2	368	Open the serial port debugging, set the send and receive to HEX.
1.13	369	)))
1.2	370
1.13	371	(((
1.2	372	Baud rate: 9600
1.13	373	)))
1.2	374
1.13	375	(((
1.2	376	check digit: Even
1.13	377	)))
1.2	378
27.2	379	[[image:image-20220527093708-21.png]]
1.2	380
	381	USB
	382
1.13	383
29.2	384	[[image:image-20220527093747-22.png]]
1.2	385
	386	USB
	387
1.13	388
	389	(((
1.2	390	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	391	)))
1.2	392
1.13	393	(((
39.4	394	(% style="color:#4f81bd" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	395	)))
1.2	396
1.13	397	(((
4.6	398	output：01 03 04 00 00 00 42 7A 02
1.13	399	)))
1.2	400
29.2	401	[[image:image-20220527093821-23.png]]
1.2	402
	403	USB
	404
29.2	405
41.2	406	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	407
	408	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.
	409
1.14	410	(((
1.15	411	(((
1.2	412	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	413	)))
1.15	414	)))
1.2	415
30.2	416	[[image:image-20220527093849-24.png]]
1.2	417
30.2	418
1.16	419	Example:These two meters are examples of setting parameters and device addresses.
1.2	420
31.2	421	[[image:image-20220527093950-25.png]]
1.2	422
32.2	423	[[image:image-20220527094028-26.png]]
1.2	424
1.14	425	(((
1.16	426	(((
1.2	427	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	428	)))
1.16	429	)))
1.2	430
1.14	431	(((
1.16	432	(((
1.2	433	We can use AT+CFGDEV to set the device address.
1.14	434	)))
1.16	435	)))
1.2	436
1.14	437	(((
1.16	438	(((
1.2	439	We modify the device address 01 of the first energy meter to 02.
1.14	440	)))
1.16	441	)))
1.2	442
35.2	443	[[image:image-20220527094100-27.png]]
1.2	444
35.2	445	(% class="box infomessage" %)
	446	(((
	447	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	448	)))
1.2	449
	450	* 01:device adaress
	451
	452	* 10:function code
	453
	454	* 00 61：Register address
	455
	456	* 00 01：Number of Registers
	457
	458	* 02：Number of bytes
	459
	460	* 00 02：Modified device address
	461
	462	* 1：Check code
	463
	464	The device address setting of the energy meter is complete.
	465
	466	Another energy meter is a single active energy meter with a floating-point format.
	467
	468	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	469
35.2	470	[[image:image-20220527094150-28.png]]
1.2	471
	472
35.2	473	[[image:image-20220527094224-29.png]]
	474
39.5	475	PAYLOAD:01 08 DF 43 62
1.2	476
	477	* 08 DF is the valid value of the meter with device address 02.
	478	* 43 62 is the valid value of the meter with device address 01.
	479
39.5	480
1.2	481	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	482
	483	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:
	484
36.2	485	[[image:image-20220527094330-30.png]]
1.2	486
	487	Connection
	488
	489	* [[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
	490
41.9	491
1.2	492	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	493
	494	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:
	495
	496	* [[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
	497
	498	* [[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
	499
	500	== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
	501
	502	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:
	503
	504	* [[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
	505
	506	== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
	507
38.1	508	[[image:image-20220527094556-31.png]]
1.2	509
	510	Network Structure
	511
	512	* [[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