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alias wrote: At the beginning of this thread there's some sample code in C# and VB.Net.
If that doesn't help you out, I can have a look at your Python code if you like?

import exceptions
import serial

class Error(exceptions.BaseException):
    pass

def readmeter(portname):
    s = serial.Serial(portname, baudrate = 300, bytesize = 7, parity = 'E', stopbits = 1)
    s.timeout = 1.5

    # Send ident message
    s.write('/?!\r\n')

    rtn = s.readline()
    if len(rtn) < 6 or rtn[0] != '/' or rtn[-1] != '\n' or rtn[-2] != '\r':
        raise Error('Invalid line "%s"' % (rtn))

    # ACK meter and ask for data
    s.write('\x06000\x0d\x0a')
    s.timeout = 2

    lines = []
    cksum = 0

    line = s.readline()
    if len(line) == 0 or line[0] != '\x02':
        raise Error('No reply to query or invalid reply \"%s\"' % (line))
    else:
        cksum ^= reduce(lambda x, y: x ^ y, map(ord, line[1:]))
        lines.append(line[1:].strip())
    while True:
        line = s.readline()
        cksum ^= reduce(lambda x, y: x ^ y, map(ord, line))
        line = line.strip()
        if len(line) == 0:
            raise Error('Timeout during message')
        if line == '!':
            break
        lines.append(line)
    fin = s.read(2)
    if len(fin) != 2:
        raise Error('Timeout reading trailer')
    if fin[0] != '\x03':
        raise Error('Trailer malformed, expected 0x03, got 0x%02x' % (ord(fin[0])))

    cksum ^= ord(fin[0])
    if cksum != ord(fin[1]):
        raise Error('Checksum mismatch, expected 0x%02x, got 0x%02x' % (cksum, ord(fin[1])))
    return lines

In [26]: iec1107.readmeter('/dev/cu.usbserial-AM01Z7UC')
Out[26]:
['C.1(12880041.0(09:04 20-11-13)',
 '1.8.1(0000000597*Wh)',
 '1.8.2(0000000000*Wh)',
 '1.8.3(0000281053*Wh)',
 '1.8.0(0000281650*Wh)',
 '2.8.0(0000535712*Wh)']

dutchandre wrote:No one reads this but I'll just try it once more
I've bought the Volkszaehler usb head and installed it's driver on my laptop with XP.
With the iec1107 test programm I can let my Ampy 5227 respond, just like with the above pcb.
This program doesn't see the data the Ampy sends out with it's red led.
Using Hterminal just like Puffin I send a textfile with /?! and 000 in it but the terminal doesn't get any useful data back.
I suppose the Hterminal only has to be set to 300baud, 7 bits and even parity.
When I use a blank sheet of paper the tekst is echoed back so the usb head seems to work fine.
What's going wrong here, the usb head responds when I send codes with an ir remote but it doesn't see the Ampy

Darius wrote:

dutchandre wrote:No one reads this but I'll just try it once more
I've bought the Volkszaehler usb head and installed it's driver on my laptop with XP.
With the iec1107 test programm I can let my Ampy 5227 respond, just like with the above pcb.
This program doesn't see the data the Ampy sends out with it's red led.
Using Hterminal just like Puffin I send a textfile with /?! and 000 in it but the terminal doesn't get any useful data back.
I suppose the Hterminal only has to be set to 300baud, 7 bits and even parity.
When I use a blank sheet of paper the tekst is echoed back so the usb head seems to work fine.
What's going wrong here, the usb head responds when I send codes with an ir remote but it doesn't see the Ampy

What do you mean exactly? Does the test1107.exe program read anything out at all? Can you post the log from it?

I believe that the communications is done at infrared, so you won't actually see it. The meter I have does flash a red LED every Watt hour, but that is separate to the IR part.