I've successfully read data from EKM metering by using Python as in http://forum.ekmmetering.com/viewtopic.php?f=4&t=3472 link.

Rs485 Connector
Rs485 Serial Connection
Rs485 Serial Pinout

Yes the data is unique to every device. There is no standard format, speed, or serial port data format. All devices pick and choose so you cannot assume code from device A would have any hope of working with device B from a different manufacturer. As was mentioned RS-485 defines the electrical communication. This repository is a basic example of serial port communication with Qt(C). SerialPort communication example with Qt (including RS232) Resources. Situation: I'm writing a Qt program to connect and get data from a device. The device uses Modbus-RTU protocol with baudrates 9600, Even Parity, 8 databits, 1 stopbit to transfer data on RS-485. My Qt program use QSerialPort class to communicate with the device. ., read sensors via TTL R4AVA07 7 Channel RS485 analog voltage sampler - Read 7 voltages vis RS485 PZEM-016 power sensor - Read mains voltage and current consumption vis RS485 Pelco-d PTZ control - Control pan tilt zoom via RS485 Huawei E3372 modem - Send sms via USB virtual serial port STM32 series WT Servo 16 - 16 channels servo motor. Serial Interfaces (RS232 and RS485) PCI Serial Interfaces 4-Port, RS-485. Qt 778981-01 NI PCI-8431/4 (RS485) 2 - 5 $ 495.00 Step 2: Select Optional Accessories.

But before that I've tried to use C++ for a long time but it is unsuccessful. I follow this document http://www.chemie.fu-berlin.de/chemnet/ ... tml#SEC237, the below is my codeThe result is

pi@raspberrypi:~/solarD/src $ ./solar.out
Send result [17]
Read result [0]
pi@raspberrypi:~/solarD/src $ ./solar.out
Send result [17]
Read result [2] 30 30

But when I change code for canonical mode of POSIX There are not thing display because program is waiting data from serial port
And when I dump serial port, it show me that there are something has received as below

pi@raspberrypi:~ $ tail -f /dev/ttyUSB0
00000001766100000000000000000000000000000000000000000000000000000000000000000000000000000002320000000000000000000000000000000000000000000000000000C000C000C0000000000011512080313555702000000000000000000000000000000000000000000000000000000000000!
=00000001766100000000000000000000000000000000000000000000000000000000000000000000000000000002324000000000000000000000000000000000000000000000000000C000C000C0000000000011512080313560302000000000000000000000000000000000000000000000000000000000000!

Anyone can suggest me how can I fix it.

The perfect combination of sophisticated hardware and software analysis

for analysis and optimizing of all RS232 and RS422/485 field-bus connections. It gathers exact information about every line change with up to 10 nanosecond precision – indispensable for each analysis of time depending protocols like Modbus RTU, Profibus or similiar. Read more about the Special Analyzer Design!

Concurrent analysis from the physical tri-state signal to the top-most levels.
All layers are only a click away. Check the data signal behind a telegram or measure the time between bits, bytes or sequences.
Synchronize the display of different layers. Let the tri-state view follow the data or telegrams and vice versa.

Using a powerful protocol template script engine the analyzer is able to parse all thinkable fieldbus protocols. And together with an unique box model it allows the user to format and summarize the telegram output in an extremely wide range.

The unerring eye

into your transmission.

OS independent time resolution of 10ns
Detects invalid/undriven signal levels
Shows the correct time relationship between all lines
Tri-State display of the data signal
Automatic detection of the data direction

Prepared for the unexpected

Baud rate and data format recognition
Supports any baud rate from 1...20MBaud
9 data bits protocol support
Detects breaks, frame and parity errors
Individual protocols by Lua templates
Supports logic signal levels *1
Program versions for
+

Rs485 Connector

Autonoum USB device

Powered and controlled via PC/USB
Signal/data processing in hardware
Easy adaptable to various bus systems
PC independent timestamps on bit level
Updatable and maintained firmware
OSI level real-time data access by PC
Several analyzer synchronizable

Processing of logic signal levels (TTL), optional interactive switching, inverting, rerouting off all signal in- and outputs

Detection of data direction also with half-duplex (2-wire) systems, bus splitting for separate watching of certain bus participants

Don't miss anything when you are going to analyse RS232 or RS485 connections! All necessary tools in a small case and with a special price!

FPGA powered signal processing

MSB-RS232 Measurement
Baud Rates	Any baud rate between 1Baud...1MBaud
Data Format	5...9 Data bits, none, even, odd, mark, space parity, any stop bits
Logical Linestates	Detection and display of logical linestates: 1 (V+), 0 (V-), invalid (-1.3V < IN < +1.3V
Time resolution	1µsec for all line change events (hardware based, OS independent)
MSB-RS232 Connectivity
Signal input	RS232 standard level, ±7V to ±12V, ESD protected inputs 5kΩ
Bus connectors	Standard D-Sub 9pin connectors, male and female, linked through high speed and via software switchable RS232 buffers
Logic Mode	All RS232 inputs are adjustable as logic inputs with trigger level 1.3V, 5kΩ
Device-PC	Standard USB cable included

MSB-RS485-PLUS Measurement
Baud Rates	Any baud rate between 1Baud...20 MBps
Data Format	5...9 Data bits, none, even, odd, mark, space parity, any stop bits
Logical Linestates	Detection and display of logical linestates: 1 (V+), 0 (V-), undriven (-0.7V < IN < +0.7V
Time resolution	10nsec for all line change events (hardware based, OS independent)
MSB-RS485-PLUS Connectivity
Signal input	RS422/485 standard level, ±7V to ±12V, ESD protected inputs 12kΩ
Bus connectors	2 Phoenix MC 1.5/6ST-3.81 with 2mm screw connectors, 6 pins each. Linked through high speed transceivers with automatic direction switch. Via software switchable bus terminators.
Auxiliary I/Os	Two additional terminals individual usable as input or output
Device-PC	Standard USB cable included

Recording
Principle	The analyzer marks every event (data byte, signal alternation) with a time stamp in 1µs resolution (independent of the PC) and send the information via USB to the connected PC
Featuring	Real time analysing and simultaneous access/display of different record parts even during an active recording
Capacity	4GByte max. record file size on PC for real time analysing. Unlimited (or free hard disk space) records when using the special command line API for long time recordings
Record time	The record time depends on the selected kind of events and data rate of the connection

Protocols
Ready to use	Predefined protocol templates for: 3964, 3964R, BACnet, Common 9-Bit, DF-1, DIN 19244, DNP3, IEC60870-5-101, IEC60870-5-103, MDB/IPC, Modbus, P-Net, Profibus, SAE-J1578, SAE-J1922,SMA Net, USS,... More are in preparation. See also protocol templates
Write your own	The analyzer is able to parse almost all thinkable RS232 and RS485 fieldbus protocols. With the integrated Lua protocol template editor it is easy to adapt or write a template for your very own protocol.
Interactive	Interactive change/modification of protocol specifications with automatic p

Qt Serial Port Rs485