You can read values directly from dvb...
import sys
import time
import fcntl
import ctypes
_IOC_NRBITS = 8
_IOC_TYPEBITS = 8
_IOC_SIZEBITS = 14
_IOC_DIRBITS = 2
_IOC_NRSHIFT = 0
_IOC_TYPESHIFT = _IOC_NRSHIFT + _IOC_NRBITS
_IOC_SIZESHIFT = _IOC_TYPESHIFT + _IOC_TYPEBITS
_IOC_DIRSHIFT = _IOC_SIZESHIFT + _IOC_SIZEBITS
_IOC_NONE = 0
_IOC_WRITE = 1
_IOC_READ = 2
def _IOC(dir_, type_, nr, size):
return (
ctypes.c_int32(dir_ << _IOC_DIRSHIFT).value |
ctypes.c_int32(ord(type_) << _IOC_TYPESHIFT).value |
ctypes.c_int32(nr << _IOC_NRSHIFT).value |
ctypes.c_int32(size << _IOC_SIZESHIFT).value)
def _IOC_TYPECHECK(t):
return ctypes.sizeof(t)
def _IO(type_, nr):
return _IOC(_IOC_NONE, type_, nr, 0)
def _IOW(type_, nr, size):
return _IOC(_IOC_WRITE, type_, nr, _IOC_TYPECHECK(size))
def _IOR(type_, nr, size):
return _IOC(_IOC_READ, type_, nr, _IOC_TYPECHECK(size))
def _IOWR(type_, nr, size):
return _IOC(_IOC_READ | _IOC_WRITE, type_, nr, _IOC_TYPECHECK(size))
enum = ctypes.c_uint
fe_status_t = enum
FE_HAS_SIGNAL = 0x01
FE_HAS_CARRIER = 0x02
FE_HAS_VITERBI = 0x04
FE_HAS_SYNC = 0x08
FE_HAS_LOCK = 0x10
FE_TIMEDOUT = 0x20
FE_REINIT = 0x40
FE_READ_STATUS = _IOR('o', 69, fe_status_t)
FE_READ_BER = _IOR('o', 70, ctypes.c_uint32)
FE_READ_SIGNAL_STRENGTH = _IOR('o', 71, ctypes.c_uint16)
FE_READ_SNR = _IOR('o', 72, ctypes.c_uint16)
FE_READ_UNCORRECTED_BLOCKS = _IOR('o', 73, ctypes.c_uint32)
class Frontend(object):
def __init__(self, fd):
self._fd = fd
def _ioctlGet(self, query, c_type):
result = c_type()
try:
fcntl.ioctl(self._fd, query, result)
except:
print "exception using %s" % query
return result
def getStatus(self):
return self._ioctlGet(FE_READ_STATUS, fe_status_t).value
def getBitErrorRate(self):
return self._ioctlGet(FE_READ_BER, ctypes.c_uint32).value
def getSignalNoiseRatio(self):
return self._ioctlGet(FE_READ_SNR, ctypes.c_uint16).value
def getSignalStrength(self):
return self._ioctlGet(FE_READ_SIGNAL_STRENGTH, ctypes.c_uint16).value
def getUncorrectedBlockCount(self):
return self._ioctlGet(FE_READ_UNCORRECTED_BLOCKS, ctypes.c_uint32).value
dev = "/dev/dvb/adapter0/frontend1"
fe = Frontend(open(dev, 'r'))
sys.stdout.write("EPOCH;BER;STATUS;SNR;SIGNAL\n")
for x in range(10):
sys.stdout.write("%d;%d;%d;%d;%d\n" % (time.time(), fe.getBitErrorRate(), fe.getStatus(), fe.getSignalNoiseRatio(), fe.getSignalStrength()))
time.sleep(1)
python dvbcsv.py
EPOCH;BER;STATUS;SNR;SIGNAL
1592339481;0;31;29520;100
1592339482;0;31;29520;100
1592339483;0;31;29520;100
1592339484;0;31;29520;100
1592339485;0;31;29520;100
1592339486;0;31;29520;100
1592339487;0;31;29520;100
1592339488;0;31;29360;100
1592339489;0;31;29360;100
1592339490;0;31;29520;100
Above code uses parts of: https://pypi.org/project/linuxdvb/
So only DVB API v3. In case you need DVB API v5 you need to create the required ioctl's.
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Unamed: 13E Quattro - 9E Quattro on IKUSI MS-0916
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