helloworld_tx.py
RPi/pyRF24Network/examples/helloworld_tx.py
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65 | """Simplest possible example of using RF24Network in RX role.
Sends messages from to receiver.
"""
import time
import struct
from RF24 import RF24
from RF24Network import RF24Network, RF24NetworkHeader
########### USER CONFIGURATION ###########
# See https://github.com/TMRh20/RF24/blob/master/pyRF24/readme.md
# Radio CE Pin, CSN Pin, SPI Speed
# CE Pin uses GPIO number with BCM and SPIDEV drivers, other platforms use
# their own pin numbering
# CS Pin addresses the SPI bus number at /dev/spidev<a>.<b>
# ie: RF24 radio(<ce_pin>, <a>*10+<b>); spidev1.0 is 10, spidev1.1 is 11 etc..
# Generic:
radio = RF24(22, 0)
################## Linux (BBB,x86,etc) #########################
# See http://nRF24.github.io/RF24/pages.html for more information on usage
# See http://iotdk.intel.com/docs/master/mraa/ for more information on MRAA
# See https://www.kernel.org/doc/Documentation/spi/spidev for more
# information on SPIDEV
# instantiate the network node using `radio` object
network = RF24Network(radio)
# Address of our node in Octal format (01,021, etc)
this_node = 0o1
# Address of the other node
other_node = 0o0
# How long to wait before sending the next message
interval = 2000 # in milliseconds
# initialize the radio
if not radio.begin():
raise RuntimeError("radio hardware not responding")
radio.channel = 90
# initialize the network node
network.begin(this_node)
# radio.printDetails()
radio.printPrettyDetails()
packets_sent = 0
last_sent = 0
try:
while True:
network.update()
now = int(time.monotonic_ns() / 1000000)
# If it's time to send a message, send it!
if now - last_sent >= interval:
last_sent = now
packets_sent += 1
payload = struct.pack("<LL", now, packets_sent)
ok = network.write(RF24NetworkHeader(other_node), payload)
print(f"Sending {packets_sent}...", "ok." if ok else "failed.")
except KeyboardInterrupt:
print("powering down radio and exiting.")
radio.powerDown()
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