# Receiving API frames (802.15.4) XBEE3 from Python is too slow

**URL:** <https://forums.digi.com/t/receiving-api-frames-802-15-4-xbee3-from-python-is-too-slow/26611>\
**Category:** XBee - 802.15.4\
**Tags:** xbee-api-mode, python-xbee, 802-15-4, xbee3\
**Created:** [July 22, 2023, 11:38pm UTC](https://forums.digi.com/t/receiving-api-frames-802-15-4-xbee3-from-python-is-too-slow/26611 "2023-07-22T23:38:59Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Ayaz](https://avatars.discourse-cdn.com/v4/letter/a/8e7dd6/32.png) [@Ayaz](https://forums.digi.com/u/Ayaz)\
**Post date:** [July 22, 2023, 11:38pm UTC](https://forums.digi.com/t/receiving-api-frames-802-15-4-xbee3-from-python-is-too-slow/26611/1 "2023-07-22T23:38:59Z")

</div>

Hello,  
I have recently purchased Digi Xbee3 zigbee mesh kit. I am using two of the Xbee devices(Sender and Receiver) with firmware: Digi Xbee3 802.15.4 (latest). Done all initial configuration and checked throughput/range test/sending-receiving API frames from console of XCTU(version 6.5.12) everything is working fine.

Now I want to do some test where I send API frames from Sender to Receiver for 1 minute and get throughput / RSSI / packet lost values. To do so I am trying to use a python script by using python digi xbee libraries.

First, I sent a frame from Sender by using Python, I have confirmed that the frame is correctly received and decoded from the XCTU console (the transfer/receive rate also seems to be fine). I am also able to receive by using Python script.but it is too slow when read\_data() is used to read the data. The transmitter send all frames on time, but receiver is unable to cope up with the rate and does not display the output fast enough.

I am including the Python codes below for transmitter and receiver here. Please let me know if I am doing any mistake / a way to fix this.

**Transmitter**

```auto
import time
from digi.xbee.devices import XBeeDevice, RemoteXBeeDevice, XBee64BitAddress, XBeeMessage

SERIAL_PORT = '/dev/tty.usbserial-AB0OO9Y6'
BAUD_RATE = 9600

transmitter = XBeeDevice(SERIAL_PORT, BAUD_RATE)
# NEW_TIMEOUT_FOR_SYNC_OPERATIONS = 5 # sec
print("Current timeout: %d seconds" %transmitter.get_sync_ops_timeout())

try:
	transmitter.open()
	destination_address = RemoteXBeeDevice(transmitter, XBee64BitAddress.from_hex_string("13A2004201081B"))
	payload_data = b"Hi ! Communicating over 802.15.4"
	transmission_interval = 0.5 # sec

	print("Transmitting data...")
	start_time = time.time()
	transmitted_packets = 0

	while time.time() - start_time < 30:
		transmitter.send_data(destination_address, payload_data)
		print('Message is sent')
		transmitted_packets += 1
		time.sleep(transmission_interval)
	print("Transmission completed.")
	print("Total transmitted packets:", transmitted_packets)

except Exception as e:
	print("Error:", str(e))

finally:
    # Close the connection
    transmitter.close()

```

**Receiver**

```auto
import time
from digi.xbee.devices import XBeeDevice, RemoteXBeeDevice, XBee64BitAddress

SERIAL_PORT = '/dev/tty.usbserial-AB0OPIU8'
BAUD_RATE = 9600

receiver = XBeeDevice(SERIAL_PORT, BAUD_RATE)

try:
	receiver.open()
	payload_size = len(b"Hi ! Communicating over 802.15.4")

	print("Receiving data...")
	start_time = time.time()
	received_packets = 0
	lost_packets = 0
	total_bytes_received = 0

	while time.time() - start_time < 60:
		xbee_message = receiver.read_data(timeout=6)
		# print(xbee_message)

		if xbee_message:
			received_packets += 1

			payload_data = xbee_message.data
			print(payload_data)

finally:
	receiver.close()

```

Thank you  
Ayaz

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<div class="post-metadata">

**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\
**Post date:** [July 24, 2023, 12:19pm UTC](https://forums.digi.com/t/receiving-api-frames-802-15-4-xbee3-from-python-is-too-slow/26611/2 "2023-07-24T12:19:47Z")

</div>

Please contact Digi Support by sending an email to [tech.support@digi.com](mailto:tech.support@digi.com) or going to [my.digi.com](http://my.digi.com) and logging in and submitting a Support case.

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<div class="post-metadata">

**Author:** ![odedtgr](https://avatars.discourse-cdn.com/v4/letter/o/8dc957/32.png) [@odedtgr](https://forums.digi.com/u/odedtgr)\
**Post date:** [December 28, 2024, 11:02pm UTC](https://forums.digi.com/t/receiving-api-frames-802-15-4-xbee3-from-python-is-too-slow/26611/3 "2024-12-28T23:02:20Z")

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> [@Ayaz](#):
>
> `timeout`

Hi, having the same isse. did you find a solution?

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<div class="post-metadata">

**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\
**Post date:** [December 30, 2024, 12:47pm UTC](https://forums.digi.com/t/receiving-api-frames-802-15-4-xbee3-from-python-is-too-slow/26611/4 "2024-12-30T12:47:35Z")

</div>

@odedtgr I would suggest making sure that you are using the current firmware version.