"""Device test: receive ESP-NOW packets on channel 5 (MicroPython)."""

import espnow
import machine
import network
import ubinascii
import time


CHANNEL = 5
TIMEOUT_MS = 1000
WDT_TIMEOUT_MS = 10000


def _set_channel(channel):
    sta = network.WLAN(network.STA_IF)
    sta.active(True)
    sta.config(pm=network.WLAN.PM_NONE)
    sta.config(channel=channel)


def recv_loop(channel=CHANNEL, timeout_ms=TIMEOUT_MS):
    wdt = machine.WDT(timeout=WDT_TIMEOUT_MS)
    _set_channel(channel)
    e = espnow.ESPNow()
    e.active(True)
    print("recv ready ch", channel)
    while True:
        wdt.feed()
        host, msg = e.recv(timeout_ms)
        if host:
            mac_hex = ubinascii.hexlify(host).decode()
            print("rx", mac_hex, "len", len(msg), "hex", ubinascii.hexlify(msg).decode())
        else:
            print("rx timeout")
        time.sleep_ms(10)


if __name__ == "__main__":
    recv_loop()