Transmit Failing

Question

I have three devices set up in XCTU, COORD, END1 and END2. They are all on the same network. In XCTU when I discover nodes in the same network they all show up in each others radio networks.

My code however will only send to one of them. Can anyone tell me why? Also I set up END1, created a profile. Loaded that profile onto END2 and changed the name to ensure they would all be on the same network.

import xbee
from machine import ADC
import time

print(" +

---

+")
print(" | XBee MicroPython Network Discovery Sample |")
print(" +

---

+\n")

ADC_PIN_ID = "D3"
adc_pin = ADC(ADC_PIN_ID)

print("Discovering network devices...\n")

network_devices = list(xbee.discover())
print("Found {0} devices.".format(len(network_devices)))

while True:
adc_value = adc_pin.read()
print("- ADC value:", adc_value)
for device in network_devices:
addr16 = device
addr64 = device

value_sent = False
try:
# Some protocols do not have 16-bit address. In those cases, use the 64-bit one.
xbee.transmit(addr16 if addr16 else addr64, str(adc_value))
value_sent = True
except Exception as e:
value_sent = False

if value_sent:
print("Sent data to: " + device)
print(device)
else:
print("Data not sent to: " + device)
print(device)
time.sleep(5)

Answer 1

Try the following sample code:

# Copyright (c) 2019, Digi International, Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

import sys
import xbee


# TODO: replace with the node identifier of your target device.
TARGET_NODE_ID = "RECEIVER"
MESSAGE = "Hello XBee!"


def find_device(node_id):
"""
Finds the XBee device with the given node identifier in the network and
returns it.

:param node_id: Node identifier of the XBee device to find.

:return: The XBee device with the given node identifier or ``None`` if it
could not be found.
"""
for dev in xbee.discover():
if dev == node_id:
return dev
return None


print(" +

---

+")
print(" | XBee MicroPython Transmit Data (NI) Sample |")
print(" +

---

+\n")

# Find the device with the configure node identifier.
device = find_device(TARGET_NODE_ID)
if not device:
print("Could not find the device with node identifier '%s'" % TARGET_NODE_ID)
sys.exit(-1)

addr16 = device
addr64 = device

print("Sending data to %s >> %s" % (TARGET_NODE_ID, MESSAGE))

try:
# Some protocols do not have 16-bit address. In those cases, use the 64-bit one.
xbee.transmit(addr16 if addr16 else addr64, MESSAGE)
print("Data sent successfully")
except Exception as e:
print("Transmit failure: %s" % str(e))