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

Version 53.2 by Xiaoling on 2022/06/01 14:36

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6.2	1	(% class="wikigeneratedid" %)
	2	Contents:
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	4	{{toc/}}
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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
41.7	38	== 1.2 Example 2: Connect to Pulse Counter ==
1.1	39
1.2	40	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	41
10.2	42	[[image:image-20220527092058-3.png]]
1.1	43
1.2	44	Connection
1.1	45
1.18	46
41.11	47
10.2	48	[[image:image-20220527092146-4.png]]
1.2	49
	50	Connection
	51
41.12	52
1.2	53	* [[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
	54	* [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
	55
10.2	56	== ==
	57
41.7	58	== 1.3 Example3: Use RS485-LN with energy meters ==
1.2	59
41.7	60	=== 1.3.1 OverView ===
1.2	61
1.5	62	(((
1.6	63	Note：The specifications of each energy meter are different, please refer to your own energy meter specifications.
1.5	64	)))
1.2	65
1.5	66	(((
1.2	67	This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
1.5	68	)))
1.2	69
13.2	70	[[image:image-20220527092419-5.png]]
1.2	71
	72	Connection1
	73
13.2	74
41.13	75
1.19	76	(((
1.2	77	How to connect with Energy Meter：
1.19	78	)))
1.2	79
1.19	80	(((
1.2	81	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	82	)))
1.2	83
1.19	84	(((
1.2	85	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
1.19	86	)))
1.2	87
1.19	88	(((
1.2	89	Power Source VIN to RS485-LN VIN+
1.19	90	)))
1.2	91
1.19	92	(((
1.2	93	Power Source GND to RS485-LN VIN-
1.19	94	)))
1.2	95
1.19	96	(((
1.2	97	Once there is power, the RS485-LN will be on.
1.19	98	)))
1.2	99
13.2	100	[[image:image-20220527092514-6.png]]
1.2	101
	102	Connection2
	103
	104
41.14	105
20.2	106	[[image:image-20220527092555-7.png]]
1.12	107
1.2	108	Connection3
	109
	110
41.7	111	=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
1.2	112
1.7	113	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	114
51.2	115	[[image:image-20220601143257-10.png]]
1.2	116
20.2	117
1.8	118	(% class="box infomessage" %)
	119	(((
20.2	120	Example: AT+COMMAND1=01 03 00 00 00 01 84 0A
1.8	121	)))
1.2	122
	123	* The first byte : slave address code (=001～247)
	124	* The second byte : read register value function code
	125	* 3rd and 4th bytes: start address of register to be read
	126	* 5th and 6th bytes: Number of registers to read
	127	* 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
	128
1.12	129	(((
1.2	130	How to parse the reading of the return command of the parameter：
1.12	131	)))
1.2	132
1.8	133	(% class="box infomessage" %)
	134	(((
20.2	135	Example: RETURN1：01 03 02 08 FD 7E 05
1.8	136	)))
1.2	137
	138	* The first byte ARD: slave address code (=001～254)
	139	* The second byte: Return to read function code
	140	* 3rd byte: total number of bytes
	141	* 4th～5th bytes: register data
	142	* The 6th and 7th bytes: CRC16 checksum
	143	* 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
	144
20.2	145	(% class="wikigeneratedid" %)
	146	(((
	147
	148	)))
	149
41.2	150	=== 1.3.3 How to configure RS485-LN and parse output commands ===
1.2	151
	152	RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
	153
20.2	154
41.2	155	==== 1.3.3.1 via AT COMMAND: ====
1.2	156
1.8	157	First, we can use AT+CFGDEV to get the return value, and we can also judge whether the input parameters are correct.
1.2	158
1.8	159	(((
1.2	160	If the configured parameters and commands are incorrect, the return value is not obtained.
1.8	161	)))
1.2	162
50.2	163	[[image:image-20220601143201-9.png]]
1.2	164
1.12	165	AT COMMAND
1.2	166
20.2	167
1.8	168	(% class="box infomessage" %)
	169	(((
4.2	170	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	171	)))
1.2	172
41.15	173	a: length for the return of AT+COMMAND
1.2	174
41.15	175	b: 1: grab valid value by byte, max 6 bytes; 2: grab valid value by bytes section, max 3 sections.
1.2	176
41.15	177	c: define the position for valid value.
1.2	178
50.2	179	[[image:image-20220601143115-8.png]]
1.2	180
	181	AT COMMAND
	182
20.2	183
41.15	184
1.2	185	PAYLOAD is available after the valid value is intercepted.
	186
1.8	187
48.2	188	[[image:image-20220601143046-7.png]]
1.2	189
	190	AT COMMAND
	191
20.2	192
41.16	193
1.2	194	You can get configured PAYLOAD on TTN.
	195
52.2	196	[[image:image-20220601143519-1.png]]
1.8	197
1.12	198	(((
1.2	199	AT COMMAND
1.12	200	)))
1.2	201
1.12	202	(((
1.13	203
	204	)))
	205
	206	(((
39.4	207	(% style="color:#4f81bd" %)Example:
39.3	208
	209	CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
1.12	210	)))
1.2	211
1.12	212	(((
1.2	213	RETURN1:01 03 02 00 02 39 85 00 00(return data)
1.12	214	)))
1.2	215
1.12	216	(((
1.2	217	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	218
	219
1.12	220	)))
1.2	221
1.12	222	(((
1.2	223	CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
1.12	224	)))
1.2	225
1.12	226	(((
1.2	227	RETURN2:01 03 02 08 DC BE 1D(return data)
1.12	228	)))
1.2	229
1.12	230	(((
1.2	231	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	232
	233
1.12	234	)))
1.2	235
1.12	236	(((
1.2	237	CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
1.12	238	)))
1.2	239
1.12	240	(((
1.2	241	RETURN3:01 03 04 00 00 00 44 FA 00(return data)
1.12	242	)))
1.2	243
1.12	244	(((
1.2	245	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	246	)))
1.2	247
1.12	248	(((
1.2	249	Payload:01 00 02 39 85 08 DC 00 00 00 44
1.12	250	)))
1.2	251
47.2	252	[[image:image-20220601142936-6.png]]
1.2	253
	254	AT COMMAND
	255
20.2	256
21.2	257	(% 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	258
41.17	259
	260
53.2	261	[[image:image-20220601143642-2.png]]
1.8	262
1.2	263	AT COMMAND
	264
	265
41.2	266	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
1.8	267
21.2	268	[[image:image-20220527093358-15.png]]
1.2	269
1.9	270	(((
1.2	271	DOWNLINK
1.9	272	)))
1.2	273
1.9	274	(((
	275
	276	)))
	277
	278	(((
39.4	279	(% style="color:#4f81bd" %)Type Code 0xAF
1.9	280	)))
1.2	281
1.9	282	(((
4.3	283	(% class="box infomessage" %)
	284	(((
1.2	285	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
1.9	286	)))
4.3	287	)))
1.2	288
1.9	289	(((
1.2	290	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
1.9	291	)))
1.2	292
1.9	293	(((
1.2	294	Format: AF MM NN LL XX XX XX XX YY
1.9	295	)))
1.2	296
1.9	297	(((
1.2	298	Where:
1.9	299	)))
1.2	300
1.9	301	(((
1.2	302	MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
1.9	303	)))
1.2	304
1.9	305	(((
1.2	306	NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
1.9	307	)))
1.2	308
1.9	309	(((
1.2	310	LL: The length of AT+COMMAND or AT+DATACUT command
1.9	311	)))
1.2	312
1.9	313	(((
1.2	314	XX XX XX XX: AT+COMMAND or AT+DATACUT command
1.9	315	)))
1.2	316
1.9	317	(((
1.2	318	YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
1.9	319	)))
1.2	320
1.9	321	(((
1.2	322	will execute an uplink after got this command.
1.9	323	)))
1.2	324
1.9	325	(((
41.18	326
	327
39.4	328	(% style="color:#4f81bd" %)Example:
1.9	329	)))
1.2	330
1.9	331	(((
39.4	332	AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
1.9	333	)))
1.2	334
22.2	335	[[image:image-20220527093430-16.png]]
1.2	336
	337	DOWNLINK
	338
1.8	339
41.19	340
24.2	341	[[image:image-20220527093508-17.png]]
1.2	342
	343	DOWNLINK
	344
1.8	345
41.20	346
24.2	347	[[image:image-20220527093530-18.png]]
1.2	348
	349	DOWNLINK
	350
1.8	351
41.21	352
26.2	353	[[image:image-20220527093607-19.png]]
1.2	354
	355	DOWNLINK
	356
1.15	357
41.22	358
46.2	359	[[image:image-20220601142805-5.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
41.23	391
29.2	392	[[image:image-20220527093747-22.png]]
1.2	393
	394	USB
	395
1.13	396
41.24	397
1.13	398	(((
1.2	399	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	400	)))
1.2	401
1.13	402	(((
39.4	403	(% style="color:#4f81bd" %)Example: (%%)input：01 03 00 31 00 02 95 c4
1.13	404	)))
1.2	405
1.13	406	(((
4.6	407	output：01 03 04 00 00 00 42 7A 02
1.13	408	)))
1.2	409
29.2	410	[[image:image-20220527093821-23.png]]
1.2	411
	412	USB
	413
29.2	414
41.2	415	=== 1.3.5 How to configure multiple devices and modify device addresses ===
1.2	416
	417	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.
	418
1.14	419	(((
1.15	420	(((
1.2	421	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
1.14	422	)))
1.15	423	)))
1.2	424
42.2	425	[[image:image-20220601142044-1.png]]
1.2	426
30.2	427
1.16	428	Example:These two meters are examples of setting parameters and device addresses.
1.2	429
31.2	430	[[image:image-20220527093950-25.png]]
1.2	431
32.2	432	[[image:image-20220527094028-26.png]]
1.2	433
1.14	434	(((
1.16	435	(((
1.2	436	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	437	)))
1.16	438	)))
1.2	439
1.14	440	(((
1.16	441	(((
1.2	442	We can use AT+CFGDEV to set the device address.
1.14	443	)))
1.16	444	)))
1.2	445
1.14	446	(((
1.16	447	(((
1.2	448	We modify the device address 01 of the first energy meter to 02.
1.14	449	)))
1.16	450	)))
1.2	451
43.2	452	[[image:image-20220601142354-2.png]]
1.2	453
35.2	454	(% class="box infomessage" %)
	455	(((
	456	AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
	457	)))
1.2	458
	459	* 01:device adaress
	460
	461	* 10:function code
	462
	463	* 00 61：Register address
	464
	465	* 00 01：Number of Registers
	466
	467	* 02：Number of bytes
	468
	469	* 00 02：Modified device address
	470
	471	* 1：Check code
	472
	473	The device address setting of the energy meter is complete.
	474
	475	Another energy meter is a single active energy meter with a floating-point format.
	476
	477	Its default device address is 01, and the following are the parameters for configuring two energy meters.
	478
44.2	479	[[image:image-20220601142452-3.png]]
1.2	480
	481
45.2	482	[[image:image-20220601142607-4.png]]
35.2	483
39.5	484	PAYLOAD:01 08 DF 43 62
1.2	485
	486	* 08 DF is the valid value of the meter with device address 02.
	487	* 43 62 is the valid value of the meter with device address 01.
	488
	489	== 1.4 Example 4: Circuit Breaker Remote Open Close ==
	490
	491	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:
	492
36.2	493	[[image:image-20220527094330-30.png]]
1.2	494
	495	Connection
	496
	497	* [[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
	498
	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
45.2	507
1.2	508	== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
	509
	510	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:
	511
	512	* [[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
	513
45.3	514
1.2	515	== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
	516
38.1	517	[[image:image-20220527094556-31.png]]
1.2	518
	519	Network Structure
	520
	521	* [[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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