micropython: loading data from a file in function causing an endless loop - micropython

Question

I am working on a lopy4 from pycom and I have encountered an od problem while loading config data from a txt file:
def loadFromConfigFile():
f= open('config.txt')
for line in f:
if "uuidExpected" in line:
uuidExpected=line[13:len(line)-1].strip()
elif "app_eui" in line:
app_eui = ubinascii.unhexlify((line[8:len(line)-1]).strip())
elif "app_key" in line:
app_key = ubinascii.unhexlify((line[8:len(line)-1]).strip())
elif "syncClockTime" in line:
syncClockTime=float(line[14:len(line)-1].strip())
elif "loraJoinTime" in line:
loraJoinTime=float(line[13:len(line)-1].strip())
elif "bleScanInterval" in line:
bleScanInterval=int(line[16:len(line)-1].strip())
elif "mainLoopWaitTime" in line:
mainLoopWaitTime=int(line[17:len(line)-1].strip())
elif "hbInterval" in line:
hbInterval=int(line[11:len(line)-1].strip())
f.close()
loadFromConfigFile()
When I use this function my programme gets stuck here:
lora.join(activation=LoRa.OTAA, auth=(app_eui, app_key), timeout=0)
while not lora.has_joined():
time.sleep(loraJoinTime)
print('Not yet joined...')
print("joined!")
setClock()
The sleep function doesn't work and the print function spams "Not yet joined..." in the terminal window.
f= open('config.txt')
for line in f:
if "uuidExpected" in line:
uuidExpected=line[13:len(line)-1].strip()
elif "app_eui" in line:
app_eui = ubinascii.unhexlify((line[8:len(line)-1]).strip())
elif "app_key" in line:
app_key = ubinascii.unhexlify((line[8:len(line)-1]).strip())
elif "syncClockTime" in line:
syncClockTime=float(line[14:len(line)-1].strip())
elif "loraJoinTime" in line:
loraJoinTime=float(line[13:len(line)-1].strip())
elif "bleScanInterval" in line:
bleScanInterval=int(line[16:len(line)-1].strip())
elif "mainLoopWaitTime" in line:
mainLoopWaitTime=int(line[17:len(line)-1].strip())
elif "hbInterval" in line:
hbInterval=int(line[11:len(line)-1].strip())
f.close()
When I don't wrap this code into a function everything works. When I write the function after the hardcoded loop everything works as well.

Answer 1

Thanks, to nekomatics comment I solved the issue. I simply wasn't aware of the global keyword in python. To stay with the same logic as before, the code should look like this.
def loadFromConfigFile():
global uuidExpected
global app_eui
global syncClockTime
global loraJoinTime
global bleScanInterval
global mainLoopWaitTime
global hbInterval
f= open('config.txt')
for line in f:
if "uuidExpected" in line:
uuidExpected=line[13:len(line)-1].strip()
elif "app_eui" in line:
app_eui = ubinascii.unhexlify((line[8:len(line)-1]).strip())
elif "app_key" in line:
app_key = ubinascii.unhexlify((line[8:len(line)-1]).strip())
elif "syncClockTime" in line:
syncClockTime=float(line[14:len(line)-1].strip())
elif "loraJoinTime" in line:
loraJoinTime=float(line[13:len(line)-1].strip())
elif "bleScanInterval" in line:
bleScanInterval=int(line[16:len(line)-1].strip())
elif "mainLoopWaitTime" in line:
mainLoopWaitTime=int(line[17:len(line)-1].strip())
elif "hbInterval" in line:
hbInterval=int(line[11:len(line)-1].strip())
f.close()