How do pys60 received data continuously?

[william.xiamen]

My platform is nokia n85, s60, 3rd edition.

I tried to build an application, I build a bluetooh serial port communication. When mobile phone receive a data, let's say "THT", the application will pop up a note "receive data: THT".

I use, socket module, socket.recv() to receive the data. It seems it is working.

I need to receive the data all the time. Means when the client send a data, mobile phone should pop up the note.

The problem A is I can not always run socket.recv() cause I have other functions. Problem B is when socket.recv() is always running, it halt when pys60 doesn't receive the data.

import appuifw
import e32
import btsocket as socket

appuifw.app.screen = "normal"


#define a bluetooth connection
def bt_connect():
global sock
sock=socket.socket(socket.AF_BT,socket.SOCK_STREAM)
target=''
if not target:
address,services=socket.bt_discover()
print "Discovered: %s, %s"%(address,services)
if len(services)>1:
import appuifw
choices=services.keys()
choices.sort()
choice=appuifw.popup_menu([unicode(services[x])+": "+x
for x in choices],u'Choose port:')
target=(address,services[choices[choice]])
else:
target=(address,services.values()[0])
print "Connecting to "+str(target)
sock.connect(target)
print "OK."

def otherfunction():
appuifw.note(u"Other function is running", "info")

#difine exit function
def exit_key_handler():
sock.close()
app_lock.signal()

# create an Active Object
app_lock = e32.Ao_lock()

# set the title of the script
appuifw.app.title = u'BLUE CONTROLL'



appuifw.app.exit_key_handler = exit_key_handler

bt_connect()

#this section to receive the data, all the time
while 1:
# problem a
data_recv = sock.recv(4)
#problem B
if data_recv=="THT":
appuifw.note(u"receive data:"+str(data_recv), "info")

#this function has no chance to run when problem a is not solved
otherfunction()

app_lock.wait()


So, my questions,
how pys60 knows when mobile receive a data?
how to receive data continuslly when other functions are running, means without run socket.recv() all the time?

many thanks in advance.

[william.xiamen]

anyone who need this code, I can send by email. tks

[marcelobarrosalmeida]

I can see at least two approachs.

1) You can add multitask capabilities to your program
2) You can use non blocking sockets (single thread pragram). Using non blocking socket mode it is possible to pool the socket and check if some data has arrived or not. In this case, your loop could be something like:

def run():
    sock.setblocking(0)
    while running:
        # allows S60 execution
        e32.ao_yield()
        # check your sockets below
        try:
            data = sock.recv(1024)
        except:
            # do something, check exception type ...
            pass
        else:
            # some data arrived, do something
            pass

Some tips about
multitask in S60