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# Test that ESP-NOW picks up the channel configuration for STA
# mode on ESP32.
#
# Note that setting the channel on a peer in ESP-NOW on modern ESP-IDF only
# checks it against the configured channel, it doesn't ever change the radio
# channel
import sys
import time
try:
import network
import espnow
except ImportError:
print("SKIP")
raise SystemExit
# ESP8266 doesn't support config('channel') on the STA interface,
# and the channel parameter to add_peer doesn't appear to set the
# channel either.
if sys.platform == "esp8266":
print("SKIP")
raise SystemExit
timeout_ms = 1000
default_pmk = b"MicroPyth0nRules"
CHANNEL = 3
WRONG_CHANNEL = 8
def init_sta():
sta = network.WLAN(network.WLAN.IF_STA)
e = espnow.ESPNow()
e.active(True)
sta.active(True)
sta.disconnect() # Force AP disconnect for any saved config, important so the channel doesn't change
sta.config(channel=CHANNEL)
e.set_pmk(default_pmk)
return sta, e
# Receiver
def instance0():
sta, e = init_sta()
multitest.globals(PEER=sta.config("mac"))
multitest.next()
print(sta.config("channel"))
while True:
peer, msg = e.recv(timeout_ms)
if peer is None:
print("Timeout")
break
print(msg)
e.active(False)
# Sender
def instance1():
sta, e = init_sta()
multitest.next()
peer = PEER
# both instances set channel via sta.config(), above
msg = b"sent to right channel 1"
e.add_peer(peer, channel=CHANNEL)
for _ in range(3):
e.send(peer, msg)
e.del_peer(peer)
print(sta.config("channel"))
sta.config(channel=WRONG_CHANNEL)
msg = b"sent to wrong channel"
e.add_peer(peer, channel=WRONG_CHANNEL)
for _ in range(3):
e.send(peer, msg)
e.del_peer(peer)
print(sta.config("channel"))
# switching back to the correct channel should also work
sta.config(channel=CHANNEL)
msg = b"sent to right channel 2"
e.add_peer(peer, channel=CHANNEL)
for _ in range(3):
e.send(peer, msg)
e.del_peer(peer)
print(sta.config("channel"))
e.active(False)
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