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# espnow module for MicroPython on ESP8266
# MIT license; Copyright (c) 2022 Glenn Moloney @glenn20
from _espnow import *
from select import poll, POLLIN
class ESPNow(ESPNowBase):
# Static buffers for alloc free receipt of messages with ESPNow.irecv().
_data = [bytearray(ADDR_LEN), bytearray(MAX_DATA_LEN)]
_none_tuple = (None, None)
def __init__(self):
super().__init__()
self._poll = poll() # For any() method below...
self._poll.register(self, POLLIN)
def irecv(self, timeout_ms=None):
n = self.recvinto(self._data, timeout_ms)
return self._data if n else self._none_tuple
def recv(self, timeout_ms=None):
n = self.recvinto(self._data, timeout_ms)
return [bytes(x) for x in self._data] if n else self._none_tuple
def __iter__(self):
return self
def __next__(self):
return self.irecv() # Use alloc free irecv() method
def any(self): # For the ESP8266 which does not have ESPNow.any()
try:
next(self._poll.ipoll(0))
return True
except StopIteration:
return False
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