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

Version 41.14 by Xiaoling on 2022/06/01 14:12

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6.2	1	(% class="wikigeneratedid" %)
	2	Contents:
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	4	{{toc/}}
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41.2	6
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	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
	174	a: length for the return of AT+COMMAND
	175
	176	b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
	177
	178	c: define the position for valid value.
	179
20.2	180	[[image:image-20220527092936-10.png]]
1.2	181
	182	AT COMMAND
	183
20.2	184
1.2	185	PAYLOAD is available after the valid value is intercepted.
	186
1.8	187
20.2	188	[[image:image-20220527093059-11.png]]
1.2	189
	190	AT COMMAND
	191
20.2	192
1.2	193	You can get configured PAYLOAD on TTN.
	194
20.2	195	[[image:image-20220527093133-12.png]]
1.8	196
1.12	197	(((
1.2	198	AT COMMAND
1.12	199	)))
1.2	200
1.12	201	(((
1.13	202
	203	)))
	204
	205	(((
39.4	206	(% style="color:#4f81bd" %)Example:
39.3	207
	208	CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	209	)))
1.2	210
1.12	211	(((
1.2	212	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	213	)))
1.2	214
1.12	215	(((
1.2	216	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	217
	218
1.12	219	)))
1.2	220
1.12	221	(((
1.2	222	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	223	)))
1.2	224
1.12	225	(((
1.2	226	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	227	)))
1.2	228
1.12	229	(((
1.2	230	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	231
	232
1.12	233	)))
1.2	234
1.12	235	(((
1.2	236	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	237	)))
1.2	238
1.12	239	(((
1.2	240	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	241	)))
1.2	242
1.12	243	(((
1.2	244	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	245	)))
1.2	246
1.12	247	(((
1.2	248	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	249	)))
1.2	250
20.2	251	[[image:image-20220527093204-13.png]]
1.2	252
	253	AT COMMAND
	254
20.2	255
21.2	256	(% 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	257
20.2	258	[[image:image-20220527093251-14.png]]
1.8	259
1.2	260	AT COMMAND
	261
	262
41.2	263	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	264
21.2	265	[[image:image-20220527093358-15.png]]
1.2	266
1.9	267	(((
1.2	268	DOWNLINK
1.9	269	)))
1.2	270
1.9	271	(((
	272
	273	)))
	274
	275	(((
39.4	276	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	277	)))
1.2	278
1.9	279	(((
4.3	280	(% class="box infomessage" %)
	281	(((
1.2	282	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	283	)))
4.3	284	)))
1.2	285
1.9	286	(((
1.2	287	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	288	)))
1.2	289
1.9	290	(((
1.2	291	Format: AF MM NN LL XX XX XX XX YY
1.9	292	)))
1.2	293
1.9	294	(((
1.2	295	Where:
1.9	296	)))
1.2	297
1.9	298	(((
1.2	299	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	300	)))
1.2	301
1.9	302	(((
1.2	303	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	304	)))
1.2	305
1.9	306	(((
1.2	307	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	308	)))
1.2	309
1.9	310	(((
1.2	311	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	312	)))
1.2	313
1.9	314	(((
1.2	315	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	316	)))
1.2	317
1.9	318	(((
1.2	319	will execute an uplink after got this command.
1.9	320	)))
1.2	321
1.9	322	(((
39.4	323	(% style="color:#4f81bd" %)Example:
1.9	324	)))
1.2	325
1.9	326	(((
39.4	327	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	328	)))
1.2	329
22.2	330	[[image:image-20220527093430-16.png]]
1.2	331
	332	DOWNLINK
	333
1.8	334
24.2	335	[[image:image-20220527093508-17.png]]
1.2	336
	337	DOWNLINK
	338
1.8	339
24.2	340	[[image:image-20220527093530-18.png]]
1.2	341
	342	DOWNLINK
	343
1.8	344
26.2	345	[[image:image-20220527093607-19.png]]
1.2	346
	347	DOWNLINK
	348
1.15	349
26.2	350	[[image:image-20220527093628-20.png]]
1.2	351
	352	DOWNLINK
	353
	354
41.2	355	=== 1.3.4 How to configure and output commands for RS485 to USB ===
1.2	356
1.13	357	(((
1.2	358	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	359	)))
1.2	360
1.13	361	(((
1.2	362	First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
1.13	363	)))
1.2	364
1.13	365	(((
1.2	366	Open the serial port debugging, set the send and receive to HEX.
1.13	367	)))
1.2	368
1.13	369	(((
1.2	370	Baud rate: 9600
1.13	371	)))
1.2	372
1.13	373	(((
1.2	374	check digit: Even
1.13	375	)))
1.2	376
27.2	377	[[image:image-20220527093708-21.png]]
1.2	378
	379	USB
	380
1.13	381
29.2	382	[[image:image-20220527093747-22.png]]
1.2	383
	384	USB
	385
1.13	386
	387	(((
1.2	388	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	389	)))
1.2	390
1.13	391	(((
39.4	392	(% style="color:#4f81bd" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	393	)))
1.2	394
1.13	395	(((
4.6	396	output：01 03 04 00 00 00 42 7A 02
1.13	397	)))
1.2	398
29.2	399	[[image:image-20220527093821-23.png]]
1.2	400
	401	USB
	402
29.2	403
41.2	404	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	405
	406	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.
	407
1.14	408	(((
1.15	409	(((
1.2	410	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	411	)))
1.15	412	)))
1.2	413
30.2	414	[[image:image-20220527093849-24.png]]
1.2	415
30.2	416
1.16	417	Example:These two meters are examples of setting parameters and device addresses.
1.2	418
31.2	419	[[image:image-20220527093950-25.png]]
1.2	420
32.2	421	[[image:image-20220527094028-26.png]]
1.2	422
1.14	423	(((
1.16	424	(((
1.2	425	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	426	)))
1.16	427	)))
1.2	428
1.14	429	(((
1.16	430	(((
1.2	431	We can use AT+CFGDEV to set the device address.
1.14	432	)))
1.16	433	)))
1.2	434
1.14	435	(((
1.16	436	(((
1.2	437	We modify the device address 01 of the first energy meter to 02.
1.14	438	)))
1.16	439	)))
1.2	440
35.2	441	[[image:image-20220527094100-27.png]]
1.2	442
35.2	443	(% class="box infomessage" %)
	444	(((
	445	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	446	)))
1.2	447
	448	* 01:device adaress
	449
	450	* 10:function code
	451
	452	* 00 61：Register address
	453
	454	* 00 01：Number of Registers
	455
	456	* 02：Number of bytes
	457
	458	* 00 02：Modified device address
	459
	460	* 1：Check code
	461
	462	The device address setting of the energy meter is complete.
	463
	464	Another energy meter is a single active energy meter with a floating-point format.
	465
	466	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	467
35.2	468	[[image:image-20220527094150-28.png]]
1.2	469
	470
35.2	471	[[image:image-20220527094224-29.png]]
	472
39.5	473	PAYLOAD:01 08 DF 43 62
1.2	474
	475	* 08 DF is the valid value of the meter with device address 02.
	476	* 43 62 is the valid value of the meter with device address 01.
	477
39.5	478
1.2	479	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	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 SCHNEIDER SMART and Monitor and control your cabinet remotely with no wires and with Dragino RS485-LN LoRaWAN technology. The structure is like below:
	482
36.2	483	[[image:image-20220527094330-30.png]]
1.2	484
	485	Connection
	486
	487	* [[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
	488
41.9	489
1.2	490	== 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
	491
	492	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:
	493
	494	* [[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
	495
	496	* [[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
	497
	498	== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
	499
	500	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:
	501
	502	* [[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
	503
	504	== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
	505
38.1	506	[[image:image-20220527094556-31.png]]
1.2	507
	508	Network Structure
	509
	510	* [[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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