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

Version 1.18 by Xiaoling on 2022/05/12 10:26

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