how to send confirmed data pycom?

[John]

@administrators
@Pycom-Channel-Partners

how to send confirmed data pycom?

my code is

s.setsockopt(socket.SOL_LORA, socket.SO_DR, 3)
s.setblocking(True)
s.setblocking(False) # false로 되어있어야 recv가 가능
time.sleep(5.0)

for i in range (200):
send = s.send(bytes([0x01, 0x02, 0x03]))
print('send_data: ', bytes([0x01, 0x02, 0x03]))
time.sleep(4)
rx = s.recv(64)
if rx:
print('recv_data: ',rx)
time.sleep(6)

but this code is non-confirmed_data...

[jcaron]

@john as described in the docs:

# selecting confirmed type of messages
s.setsockopt(socket.SOL_LORA, socket.SO_CONFIRMED, True)

Note that due to the bands limitations, there are often strict limits on how much confirmed packets you are allowed to send.

[John]

thank you!

I succeeded in sending confirmed data.
but, i don't know ack packet printing.
Do you know printing ack packet as lopy ??
this is my code

---

join process
.
.
.
s = socket.socket(socket.AF_LORA, socket.SOCK_RAW)
s.setsockopt(socket.SOL_LORA, socket.SO_CONFIRMED, True)
print('Sending...')
s.send("send pk #%d" %4)
time.sleep(40)
print(s.recv(12))

but this code no output ..

[jmarcelino]

@john

You need to register a LoRa callback to work with the acknowledgements, i.e.:

lora.callback(LoRa.TX_FAILED_EVENT, handler=YourHandlerFunction, arg=None)

"If the ack is not received LoRa.TX_FAILED_EVENT will be raised after the number of tx_retries configured have been performed."