Changes for page Application Note : Communicate with Different Sensors ----- RS485-LN / RS485-BL

Last modified by Karry Zhuang on 2024/07/11 11:58

From version < 1.11 >

edited by Xiaoling
on 2022/05/12 10:07

To version < 1.15 >

edited by Xiaoling
on 2022/05/12 10:19

Change comment: There is no comment for this version

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@@ -67,8 +67,9 @@
  Connection2
--[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="800" width="600"]]
++[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="712" width="534"]]
++
  Connection3
@@ -89,7 +89,9 @@
  * 5th and 6th bytes: Number of registers to read
  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
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  How to parse the reading of the return command of the parameter：
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  (% class="box infomessage" %)
  (((
@@ -117,7 +117,7 @@
  [[image:https://wiki.dragino.com/images/b/bc/AT_COMMAND1.png||height="358" width="456"]]
--**AT COMMAND**
++AT COMMAND
  (% class="box infomessage" %)
  (((
@@ -146,27 +146,53 @@
  [[image:https://wiki.dragino.com/images/thumb/c/c2/AT_COMMAND3.png/600px-AT_COMMAND3.png||height="138" width="600"]]
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  AT COMMAND
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++
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++
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  **Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
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  RETURN1:01 03 02 00 02 39 85 00 00(return data)
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  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.
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  CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
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  RETURN2:01 03 02 08 DC BE 1D(return data)
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  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.
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  CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
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  RETURN3:01 03 04 00 00 00 44 FA 00(return data)
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  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.
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  Payload:01 00 02 39 85 08 DC 00 00 00 44
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  [[image:https://wiki.dragino.com/images/thumb/9/9b/AT_COMMAND10.png/600px-AT_COMMAND10.png||height="278" width="600"]]
@@ -263,6 +263,7 @@
  DOWNLINK
++
  [[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png||height="365" width="600"]]
  DOWNLINK
@@ -270,30 +270,47 @@
  === 1.3.4 How to configure and output commands for RS485 to USB ===
++(((
  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.
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  First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
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  Open the serial port debugging, set the send and receive to HEX.
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  Baud rate: 9600
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  check digit: Even
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--[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="800" width="600"]]
++[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="725" width="544"]]
  USB
--[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="800" width="600"]]
++[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="728" width="546"]]
++
  USB
++
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  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.
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--Example:input：01 03 00 31 00 02 95 c4
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++**Example:**  input：01 03 00 31 00 02 95 c4
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--{{{      output:01 03 04 00 00 00 42 7A 02
--}}}
++(((
++                 output:01 03 04 00 00 00 42 7A 02
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  [[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]
@@ -303,7 +303,11 @@
  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.
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  Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
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  [[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png||alt="Double meter3.png" height="83" width="600"]]
@@ -311,13 +311,19 @@
  [[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="800" width="600"]]
--[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="800" width="600"]]
++[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="733" width="550"]]
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  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.
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  We can use AT+CFGDEV to set the device address.
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  We modify the device address 01 of the first energy meter to 02.
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  [[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]

Changes for page Application Note : Communicate with Different Sensors ----- RS485-LN / RS485-BL

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