# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT

# Example to send a packet periodically between addressed nodes
# Author: Jerry Needell
#
import time

import board
import busio
import digitalio

import adafruit_rfm9x

# Define radio parameters.
RADIO_FREQ_MHZ = 915.0  # Frequency of the radio in Mhz. Must match your
# module! Can be a value like 915.0, 433.0, etc.

# Define pins connected to the chip.
CS = digitalio.DigitalInOut(board.CE1)
RESET = digitalio.DigitalInOut(board.D25)

# Initialize SPI bus.
spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)

# Initialze RFM radio
rfm9x = adafruit_rfm9x.RFM9x(spi, CS, RESET, RADIO_FREQ_MHZ)

# set node addresses
rfm9x.node = 2
rfm9x.destination = 1
# initialize counter
counter = 0
# send a broadcast message from my_node with ID = counter
rfm9x.send(bytes(f"startup message from node {rfm9x.node} ", "UTF-8"))

# Wait to receive packets.
print("Waiting for packets...")
# initialize flag and timer
time_now = time.monotonic()
while True:
    # Look for a new packet: only accept if addresses to my_node
    packet = rfm9x.receive(with_header=True)
    # If no packet was received during the timeout then None is returned.
    if packet is not None:
        # Received a packet!
        # Print out the raw bytes of the packet:
        print("Received (raw header):", [hex(x) for x in packet[0:4]])
        print(f"Received (raw payload): {packet[4:]}")
        print(f"Received RSSI: {rfm9x.last_rssi}")
        # send reading after any packet received
        counter = counter + 1
        # after 10 messages send a response to destination_node from my_node with ID = counter&0xff
        if counter % 10 == 0:
            time.sleep(0.5)  # brief delay before responding
            rfm9x.identifier = counter & 0xFF
            rfm9x.send(
                bytes(
                    f"message number {counter} from node {rfm9x.node} ",
                    "UTF-8",
                ),
                keep_listening=True,
            )
