def AvailableDevices(self, callback=None, force=False):
if self.available_devices is None or force:
if callback is not None:
# Create a thread to do the work and call back when done
thread = Thread(target=self._scan_thread,
kwargs={
'callback': callback,
'force': force
})
thread.start()
# Signal we are waiting for a callback
available = None
else:
# No callback so we have to do it here.
with self.lock:
# Look for any labjacks anywhere
results = ljm.listAllS("ANY", "ANY")
# Becomes a list of found sn's with model and connections
self.available_devices = {}
for index in range(results[0]):
sn = str(results[3][index])
model = results[1][index]
if model in LABJACK_MODELS:
model = LABJACK_MODELS[model]
connection = results[2][index]
if connection in LABJACK_CONNECTIONS:
connection = LABJACK_CONNECTIONS[connection]
# Remove model and connections seen for each serial number
if sn not in self.available_devices:
self.available_devices[sn] = {
'model': model,
'connections': [connection]
}
else:
if connection not in self.available_devices[
sn]['connections']:
self.available_devices[sn][
'connections'].append(connection)
available = self.available_devices
else:
available = self.available_devices
return available
def ld_connect(dt, ct):
"""
function used to detect LabJack device(s) using specific protocol(s)
dt: device type DEVICE and ANY allowed
ct: connection type CT values and ANY allowed
return: list of connection to devices and list of connection information in case of loosing connection for
trying to restore the connection to de device
>>> dev = ld_connect(ANY, ANY) #it will connect to any labjack devices using any protocols
>>> dev = ld_connect(DEVICE_T7, CT[3]) #it will connect to labjack t7 devices using tcp protocols
>>> dev = ld_connect(DEVICE_T7, ANY) #it will connect to labjack t7 devices using any protocols
>>> dev = ld_connect(DEVICE_T7, CT[2]) #it will connect to labjack t7 devices using only wifi
>>> dev = ld_connect(DEVICE_T7, CT[1]) #it will connect to labjack t7 devices using only ethernet
>>> dev = ld_connect(DEVICE_T7, CT[0]) #it will connect to labjack t7 devices using only usb
"""
connection_info = []
handle = []
labjack_devices = ljm.listAllS(dt, ct)
for index in range(labjack_devices[CD_INDEX]):
try:
handle.append(
ljm.open(
labjack_devices[DT_INDEX][index],
labjack_devices[CT_INDEX][index],
labjack_devices[SN_INDEX][index]
)
)
connection_info.append(
[
labjack_devices[DT_INDEX][index],
labjack_devices[CT_INDEX][index],
labjack_devices[SN_INDEX][index]
]
)
except ljm.ljm.LJMError as LjmError:
print(
LjmError._errorString + ": Unable to connect to device " + str(
[
labjack_devices[DT_INDEX][index],
labjack_devices[CT_INDEX][index],
labjack_devices[SN_INDEX][index]
]
)
)
return handle, connection_info
listAllS.
Args:
functionName: The name of the function used
info: tuple returned by listAll or listAllS
"""
print("\n%s found %i LabJacks:\n" % (functionName, info[0]))
fmt = ''.join(["{%i:<18}" % i for i in range(0, 4)])
print(
fmt.format("Device Type", "Connection Type", "Serial Number",
"IP Address"))
for i in range(info[0]):
print(
fmt.format(DEVICE_TYPES.setdefault(info[1][i], str(info[1][i])),
CONN_TYPES.setdefault(info[2][i], str(info[2][i])),
str(info[3][i]), ljm.numberToIP(info[4][i])))
# listAll and listAllS returns the tuple (numFound, aDeviceTypes,
# aConnectionTypes, aSerialNumbers, aIPAddresses)
# Find and display LabJack devices with listAllS.
info = ljm.listAllS("ANY", "ANY")
displayDeviceInfo("listAllS", info)
"""
# Find and display LabJack devices with listAll.
info = ljm.listAll(ljm.constants.ctANY, ljm.constants.ctANY)
displayDeviceInfo("listAll", info)
"""
CONN_TYPES = {ljm.constants.ctUSB: "USB", ljm.constants.ctTCP: "TCP", \
ljm.constants.ctETHERNET: "Ethernet", ljm.constants.ctWIFI: "WiFi"}
#Displays the LabJack devices information from listAll or listAllS.
#functionName: The name of the function used
#info: tuple returned by listAll or listAllS
def displayDeviceInfo(functionName, info):
print("\n%s found %i LabJacks:\n" % (functionName, info[0]))
fmt = ''.join(["{%i:<18}" % i for i in range(0, 4)])
print(fmt.format("Device Type", "Connection Type", "Serial Number", \
"IP Address"))
for i in range(info[0]):
print(fmt.format(DEVICE_TYPES.setdefault(info[1][i], str(info[1][i])), \
CONN_TYPES.setdefault(info[2][i], str(info[2][i])), \
str(info[3][i]), \
ljm.numberToIP(info[4][i])))
#listAll and listAllS returns the tuple (numFound, aDeviceTypes,
#aConnectionTypes, aSerialNumbers, aIPAddresses)
#Find and display LabJack devices with listAllS.
info = ljm.listAllS("ANY", "ANY")
displayDeviceInfo("listAllS", info)
'''
#Find and display LabJack devices with listAll.
info = ljm.listAll(ljm.constants.ctANY, ljm.constants.ctANY)
displayDeviceInfo("listAll", info)
'''