About Modbus and Intel Edison Protocol
Modbus is a well-known communication protocol that has found application in industry and in amateur projects. At the physical level, communication between devices using this protocol can use serial interfaces (RS232 or RS485) or Ethernet (TCP or UDP protocols are involved here). Today we will talk about how to organize the interaction of Intel Edison with other devices using Modbus.
There are quite a few Linux libraries that allow you to use Modbus. Among them are the following:
The installation procedure depends on the selected library. Consider the installation for the three libraries mentioned above.
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For the tests, we use pymodbus , which comes with examples of client and server code.
First you need to install an additional package, "pyserial". You can do this with the following command:
In order to test communication over the serial interface, we use two Intel Edison Arduino switching cards. Which TX and RX are cross connected, that is, the IO-output 0 of the first board is connected to the IO-output 1 of the second board and vice versa. In order to test this construction, we use a slightly modified example code “ synchronous server ” on one board, and on the other - the code from the example “ synchronous client ”.
Here are the changes made to the server code.
And here is our client code:
The serial port is initialized by MRAA. After that, Modbus can work with "/ dev / ttyMFD1 ".
If everything is configured correctly, it will be possible to see Modbus messages coming from the client on the server.
In order to test the interaction via the modbus protocol via Ethernet, we used the examples “ asynchronous server ” and “ asynchronous client ”, slightly editing their code again.
The server is assigned an IPv4 address xxx.xxx.xxx.xxx and a port (5020 in our case).
But similar client settings:
If everything, again, is configured correctly, you can see the messages from the client part of the system, coming to the server. For example, they might look like this:
The example given here will allow for modbus communication between Intel Edison and various devices, using serial interfaces or Ethernet as the transmission medium. This solution is very popular and universal, therefore, we are sure you will find useful applications for it.
Libraries
There are quite a few Linux libraries that allow you to use Modbus. Among them are the following:
- C / C ++, for example, libmodbus.
- Node, for example, “modbus” is a wrapper for libmodbus.
- Python, for example, pymodbus
Installation
The installation procedure depends on the selected library. Consider the installation for the three libraries mentioned above.
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- Libmodbus. It is necessary either to build the library from source, or to install the package, for example, with repo.opkg.net using the “opkg install libmodbus” command.
- To install node modbus, you will need the “npm install modbus” command.
- For pymodbus, the command “pip install pymodbus”. Pip can be taken, for example, from repo.opkg.net .
Testing
For the tests, we use pymodbus , which comes with examples of client and server code.
Testing using a serial interface
First you need to install an additional package, "pyserial". You can do this with the following command:
pip install pyserial In order to test communication over the serial interface, we use two Intel Edison Arduino switching cards. Which TX and RX are cross connected, that is, the IO-output 0 of the first board is connected to the IO-output 1 of the second board and vice versa. In order to test this construction, we use a slightly modified example code “ synchronous server ” on one board, and on the other - the code from the example “ synchronous client ”.
Here are the changes made to the server code.
# # ---------------- # Tcp: # StartTcpServer(context, identity=identity, address=("localhost", 5020)) # Udp: # StartUdpServer(context, identity=identity, address=("localhost", 502)) # Ascii: # StartSerialServer(context, identity=identity, port='/dev/pts/3', timeout=1) # RTU: import mraa, serial as s mraa.Uart(0) StartSerialServer(context, identity, port='/dev/ttyMFD1', stopbits=s.STOPBITS_ONE, bytesize=s.EIGHTBITS, baudrate=115200, parity=s.PARITY_NONE) And here is our client code:
[...] # client = ModbusClient('localhost', retries=3, retry_on_empty=True) # ---------------------------------------------------------------------------# # client = ModbusClient('localhost', port=502) # client = ModbusClient(method='ascii', port='/dev/pts/2', timeout=1) # client = ModbusClient(method='rtu', port='/dev/pts/2', timeout=1) import mraa, serial as s mraa.Uart(0) client = ModbusClient(method='rtu', port='/dev/ttyMFD1', stopbits=1, bytesize=8, baudrate=115200, parity=s.PARITY_NONE) client.connect() [...] The serial port is initialized by MRAA. After that, Modbus can work with "/ dev / ttyMFD1 ".
If everything is configured correctly, it will be possible to see Modbus messages coming from the client on the server.
TCP / IP over Ethernet (for example, WiFi)
In order to test the interaction via the modbus protocol via Ethernet, we used the examples “ asynchronous server ” and “ asynchronous client ”, slightly editing their code again.
The server is assigned an IPv4 address xxx.xxx.xxx.xxx and a port (5020 in our case).
[...] StartTcpServer(context, identity=identity, address=("xxx.xxx.xxx.xxx", 5020)) But similar client settings:
[...] #---------------------------------------------------------------------------# defer = protocol.ClientCreator(reactor, ModbusClientProtocol ).connectTCP("xxx.xxx.xxx.xxx", 5020) defer.addCallback(beginAsynchronousTest) reactor.run() If everything, again, is configured correctly, you can see the messages from the client part of the system, coming to the server. For example, they might look like this:
# python AsynchronousServerExample.py INFO:pymodbus.server.async:Starting Modbus TCP Server on 192.168.178.72:5020 DEBUG:pymodbus.server.async:Client Connected [IPv4Address(TCP, '192.168.178.72', 5020)] DEBUG:pymodbus.server.async:0x0 0x1 0x0 0x0 0x0 0x6 0x0 0x5 0x0 0x1 0xff 0x0 0x0 0x2 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x1 0x0 0x3 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0xff 0x0 0x4 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x8 0x0 0x5 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0x0 0x0 0x6 0x0 0x0 0x0 0x6 0x0 0x2 0x0 0x1 0x0 0x8 0x0 0x7 0x0 0x0 0x0 0x6 0x0 0x6 0x0 0x1 0x0 0xa 0x0 0x8 0x0 0x0 0x0 0x6 0x0 0x3 0x0 0x1 0x0 0x1 0x0 0x9 0x0 0x0 0x0 0x17 0x0 0x10 0x0 0x1 0x0 0x8 0x10 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 0x0 0xb 0x0 0x0 0x0 0x1b 0x0 0x17 0x0 0x1 0x0 0x8 0x0 0x1 0x0 0x8 0x10 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0xc 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 DEBUG:pymodbus.transaction:0x0 0x1 0x0 0x0 0x0 0x6 0x0 0x5 0x0 0x1 0xff 0x0 0x0 0x2 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x1 0x0 0x3 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0xff 0x0 0x4 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x8 0x0 0x5 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0x0 0x0 0x6 0x0 0x0 0x0 0x6 0x0 0x2 0x0 0x1 0x0 0x8 0x0 0x7 0x0 0x0 0x0 0x6 0x0 0x6 0x0 0x1 0x0 0xa 0x0 0x8 0x0 0x0 0x0 0x6 0x0 0x3 0x0 0x1 0x0 0x1 0x0 0x9 0x0 0x0 0x0 0x17 0x0 0x10 0x0 0x1 0x0 0x8 0x10 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 0x0 0xb 0x0 0x0 0x0 0x1b 0x0 0x17 0x0 0x1 0x0 0x8 0x0 0x1 0x0 0x8 0x10 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0xc 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 DEBUG:pymodbus.factory:Factory Request[5] DEBUG:pymodbus.datastore.context:validate[5] 2:1 DEBUG:pymodbus.datastore.context:setValues[5] 2:1 DEBUG:pymodbus.datastore.context:getValues[5] 2:1 DEBUG:pymodbus.server.async:send: 00010000000600050001ff00 DEBUG:pymodbus.factory:Factory Request[1] DEBUG:pymodbus.datastore.context:validate[1] 2:1 DEBUG:pymodbus.datastore.context:getValues[1] 2:1 DEBUG:pymodbus.server.async:send: 00020000000400010101 0x0 0x5 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0x0 0x0 0x6 0x0 0x0 0x0 0x6 0x0 0x2 0x0 0x1 0x0 0x8 0x0 0x7 0x0 0x0 0x0 0x6 0x0 0x6 0x0 0x1 0x0 0xa 0x0 0x8 0x0 0x0 # python AsynchronousServerExample.py INFO:pymodbus.server.async:Starting Modbus TCP Server on 192.168.178.72:5020 DEBUG:pymodbus.server.async:Client Connected [IPv4Address(TCP, '192.168.178.72', 5020)] DEBUG:pymodbus.server.async:0x0 0x1 0x0 0x0 0x0 0x6 0x0 0x5 0x0 0x1 0xff 0x0 0x0 0x2 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x1 0x0 0x3 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0xff 0x0 0x4 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x8 0x0 0x5 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0x0 0x0 0x6 0x0 0x0 0x0 0x6 0x0 0x2 0x0 0x1 0x0 0x8 0x0 0x7 0x0 0x0 0x0 0x6 0x0 0x6 0x0 0x1 0x0 0xa 0x0 0x8 0x0 0x0 0x0 0x6 0x0 0x3 0x0 0x1 0x0 0x1 0x0 0x9 0x0 0x0 0x0 0x17 0x0 0x10 0x0 0x1 0x0 0x8 0x10 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 0x0 0xb 0x0 0x0 0x0 0x1b 0x0 0x17 0x0 0x1 0x0 0x8 0x0 0x1 0x0 0x8 0x10 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0xc 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 DEBUG:pymodbus.transaction:0x0 0x1 0x0 0x0 0x0 0x6 0x0 0x5 0x0 0x1 0xff 0x0 0x0 0x2 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x1 0x0 0x3 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0xff 0x0 0x4 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x8 0x0 0x5 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0x0 0x0 0x6 0x0 0x0 0x0 0x6 0x0 0x2 0x0 0x1 0x0 0x8 0x0 0x7 0x0 0x0 0x0 0x6 0x0 0x6 0x0 0x1 0x0 0xa 0x0 0x8 0x0 0x0 0x0 0x6 0x0 0x3 0x0 0x1 0x0 0x1 0x0 0x9 0x0 0x0 0x0 0x17 0x0 0x10 0x0 0x1 0x0 0x8 0x10 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 0x0 0xb 0x0 0x0 0x0 0x1b 0x0 0x17 0x0 0x1 0x0 0x8 0x0 0x1 0x0 0x8 0x10 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0xc 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 DEBUG:pymodbus.factory:Factory Request[5] DEBUG:pymodbus.datastore.context:validate[5] 2:1 DEBUG:pymodbus.datastore.context:setValues[5] 2:1 DEBUG:pymodbus.datastore.context:getValues[5] 2:1 DEBUG:pymodbus.server.async:send: 00010000000600050001ff00 DEBUG:pymodbus.factory:Factory Request[1] DEBUG:pymodbus.datastore.context:validate[1] 2:1 DEBUG:pymodbus.datastore.context:getValues[1] 2:1 DEBUG:pymodbus.server.async:send: 00020000000400010101 0x0 0x9 0x0 0x0 0x0 0x17 0x0 0x10 0x0 0x1 0x0 0x8 0x10 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 0x0 # python AsynchronousServerExample.py INFO:pymodbus.server.async:Starting Modbus TCP Server on 192.168.178.72:5020 DEBUG:pymodbus.server.async:Client Connected [IPv4Address(TCP, '192.168.178.72', 5020)] DEBUG:pymodbus.server.async:0x0 0x1 0x0 0x0 0x0 0x6 0x0 0x5 0x0 0x1 0xff 0x0 0x0 0x2 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x1 0x0 0x3 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0xff 0x0 0x4 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x8 0x0 0x5 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0x0 0x0 0x6 0x0 0x0 0x0 0x6 0x0 0x2 0x0 0x1 0x0 0x8 0x0 0x7 0x0 0x0 0x0 0x6 0x0 0x6 0x0 0x1 0x0 0xa 0x0 0x8 0x0 0x0 0x0 0x6 0x0 0x3 0x0 0x1 0x0 0x1 0x0 0x9 0x0 0x0 0x0 0x17 0x0 0x10 0x0 0x1 0x0 0x8 0x10 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 0x0 0xb 0x0 0x0 0x0 0x1b 0x0 0x17 0x0 0x1 0x0 0x8 0x0 0x1 0x0 0x8 0x10 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0xc 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 DEBUG:pymodbus.transaction:0x0 0x1 0x0 0x0 0x0 0x6 0x0 0x5 0x0 0x1 0xff 0x0 0x0 0x2 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x1 0x0 0x3 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0xff 0x0 0x4 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x8 0x0 0x5 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0x0 0x0 0x6 0x0 0x0 0x0 0x6 0x0 0x2 0x0 0x1 0x0 0x8 0x0 0x7 0x0 0x0 0x0 0x6 0x0 0x6 0x0 0x1 0x0 0xa 0x0 0x8 0x0 0x0 0x0 0x6 0x0 0x3 0x0 0x1 0x0 0x1 0x0 0x9 0x0 0x0 0x0 0x17 0x0 0x10 0x0 0x1 0x0 0x8 0x10 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 0x0 0xb 0x0 0x0 0x0 0x1b 0x0 0x17 0x0 0x1 0x0 0x8 0x0 0x1 0x0 0x8 0x10 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0xc 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 DEBUG:pymodbus.factory:Factory Request[5] DEBUG:pymodbus.datastore.context:validate[5] 2:1 DEBUG:pymodbus.datastore.context:setValues[5] 2:1 DEBUG:pymodbus.datastore.context:getValues[5] 2:1 DEBUG:pymodbus.server.async:send: 00010000000600050001ff00 DEBUG:pymodbus.factory:Factory Request[1] DEBUG:pymodbus.datastore.context:validate[1] 2:1 DEBUG:pymodbus.datastore.context:getValues[1] 2:1 DEBUG:pymodbus.server.async:send: 00020000000400010101 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0x0 0x0 0x6 0x0 0x0 0x0 0x6 0x0 0x2 0x0 0x1 0x0 0x8 0x0 0x7 0x0 0x0 0x0 0x6 0x0 0x6 0x0 0x1 0x0 0xa 0x0 0x8 0x0 0x0 0x0 0x6 # python AsynchronousServerExample.py INFO:pymodbus.server.async:Starting Modbus TCP Server on 192.168.178.72:5020 DEBUG:pymodbus.server.async:Client Connected [IPv4Address(TCP, '192.168.178.72', 5020)] DEBUG:pymodbus.server.async:0x0 0x1 0x0 0x0 0x0 0x6 0x0 0x5 0x0 0x1 0xff 0x0 0x0 0x2 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x1 0x0 0x3 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0xff 0x0 0x4 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x8 0x0 0x5 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0x0 0x0 0x6 0x0 0x0 0x0 0x6 0x0 0x2 0x0 0x1 0x0 0x8 0x0 0x7 0x0 0x0 0x0 0x6 0x0 0x6 0x0 0x1 0x0 0xa 0x0 0x8 0x0 0x0 0x0 0x6 0x0 0x3 0x0 0x1 0x0 0x1 0x0 0x9 0x0 0x0 0x0 0x17 0x0 0x10 0x0 0x1 0x0 0x8 0x10 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 0x0 0xb 0x0 0x0 0x0 0x1b 0x0 0x17 0x0 0x1 0x0 0x8 0x0 0x1 0x0 0x8 0x10 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0xc 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 DEBUG:pymodbus.transaction:0x0 0x1 0x0 0x0 0x0 0x6 0x0 0x5 0x0 0x1 0xff 0x0 0x0 0x2 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x1 0x0 0x3 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0xff 0x0 0x4 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x8 0x0 0x5 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0x0 0x0 0x6 0x0 0x0 0x0 0x6 0x0 0x2 0x0 0x1 0x0 0x8 0x0 0x7 0x0 0x0 0x0 0x6 0x0 0x6 0x0 0x1 0x0 0xa 0x0 0x8 0x0 0x0 0x0 0x6 0x0 0x3 0x0 0x1 0x0 0x1 0x0 0x9 0x0 0x0 0x0 0x17 0x0 0x10 0x0 0x1 0x0 0x8 0x10 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 0x0 0xb 0x0 0x0 0x0 0x1b 0x0 0x17 0x0 0x1 0x0 0x8 0x0 0x1 0x0 0x8 0x10 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0xc 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 DEBUG:pymodbus.factory:Factory Request[5] DEBUG:pymodbus.datastore.context:validate[5] 2:1 DEBUG:pymodbus.datastore.context:setValues[5] 2:1 DEBUG:pymodbus.datastore.context:getValues[5] 2:1 DEBUG:pymodbus.server.async:send: 00010000000600050001ff00 DEBUG:pymodbus.factory:Factory Request[1] DEBUG:pymodbus.datastore.context:validate[1] 2:1 DEBUG:pymodbus.datastore.context:getValues[1] 2:1 DEBUG:pymodbus.server.async:send: 00020000000400010101 0x0 0x0 0x0 0x17 0x0 0x10 0x0 0x1 0x0 0x8 0x10 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 0x0 0xb 0x0 # python AsynchronousServerExample.py INFO:pymodbus.server.async:Starting Modbus TCP Server on 192.168.178.72:5020 DEBUG:pymodbus.server.async:Client Connected [IPv4Address(TCP, '192.168.178.72', 5020)] DEBUG:pymodbus.server.async:0x0 0x1 0x0 0x0 0x0 0x6 0x0 0x5 0x0 0x1 0xff 0x0 0x0 0x2 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x1 0x0 0x3 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0xff 0x0 0x4 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x8 0x0 0x5 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0x0 0x0 0x6 0x0 0x0 0x0 0x6 0x0 0x2 0x0 0x1 0x0 0x8 0x0 0x7 0x0 0x0 0x0 0x6 0x0 0x6 0x0 0x1 0x0 0xa 0x0 0x8 0x0 0x0 0x0 0x6 0x0 0x3 0x0 0x1 0x0 0x1 0x0 0x9 0x0 0x0 0x0 0x17 0x0 0x10 0x0 0x1 0x0 0x8 0x10 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 0x0 0xb 0x0 0x0 0x0 0x1b 0x0 0x17 0x0 0x1 0x0 0x8 0x0 0x1 0x0 0x8 0x10 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0xc 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 DEBUG:pymodbus.transaction:0x0 0x1 0x0 0x0 0x0 0x6 0x0 0x5 0x0 0x1 0xff 0x0 0x0 0x2 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x1 0x0 0x3 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0xff 0x0 0x4 0x0 0x0 0x0 0x6 0x0 0x1 0x0 0x1 0x0 0x8 0x0 0x5 0x0 0x0 0x0 0x8 0x0 0xf 0x0 0x1 0x0 0x8 0x1 0x0 0x0 0x6 0x0 0x0 0x0 0x6 0x0 0x2 0x0 0x1 0x0 0x8 0x0 0x7 0x0 0x0 0x0 0x6 0x0 0x6 0x0 0x1 0x0 0xa 0x0 0x8 0x0 0x0 0x0 0x6 0x0 0x3 0x0 0x1 0x0 0x1 0x0 0x9 0x0 0x0 0x0 0x17 0x0 0x10 0x0 0x1 0x0 0x8 0x10 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0xa 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 0x0 0xb 0x0 0x0 0x0 0x1b 0x0 0x17 0x0 0x1 0x0 0x8 0x0 0x1 0x0 0x8 0x10 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0x14 0x0 0xc 0x0 0x0 0x0 0x6 0x0 0x4 0x0 0x1 0x0 0x8 DEBUG:pymodbus.factory:Factory Request[5] DEBUG:pymodbus.datastore.context:validate[5] 2:1 DEBUG:pymodbus.datastore.context:setValues[5] 2:1 DEBUG:pymodbus.datastore.context:getValues[5] 2:1 DEBUG:pymodbus.server.async:send: 00010000000600050001ff00 DEBUG:pymodbus.factory:Factory Request[1] DEBUG:pymodbus.datastore.context:validate[1] 2:1 DEBUG:pymodbus.datastore.context:getValues[1] 2:1 DEBUG:pymodbus.server.async:send: 00020000000400010101 Results
The example given here will allow for modbus communication between Intel Edison and various devices, using serial interfaces or Ethernet as the transmission medium. This solution is very popular and universal, therefore, we are sure you will find useful applications for it.
Source: https://habr.com/ru/post/282926/
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