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

Version 1.16 by Xiaoling on 2022/05/12 10:19

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