'''
CYD (Cheap Yellow Display)
ESP32 receiver showing remote BME280 values

Communication Method: ESPNOW

external libraries:
https://github.com/rdagger/micropython-ili9341

2026-01-26 mchris
'''

import network
import espnow
import struct
from ili9341 import Display, color565
import esp32
from machine import Pin, SPI
import time

display_spi = SPI(1, baudrate=80000000, sck=Pin(14), mosi=Pin(13))
# The library needs a reset pin, which does not exist on this board
display = Display(display_spi, dc=Pin(2), cs=Pin(15), rst=Pin(15),rotation=90)

# Turn on display backlight
backlight = Pin(21, Pin.OUT)
backlight.on()

DARKGRAY=color565(80, 80, 80)
BLUE=color565(0, 0, 255)
GREEN=color565(0, 255, 0)
WHITE=color565(255, 255, 255)
YELLOW=color565(0, 255, 255)
BLACK=color565(0, 0, 0)

display.clear(DARKGRAY)

x=10;y=20
display.draw_text8x8(x, y, "REMOTE BME280", YELLOW,  background=BLACK, rotate=0)

# A WLAN interface must be active to send()/recv()
sta = network.WLAN(network.WLAN.IF_STA)
sta.active(True)
sta.disconnect()   # Because ESP8266 auto-connects to last Access Point
print('MAC:', ':'.join(['%02x' % b for b in sta.config('mac')]))

e = espnow.ESPNow()
e.active(True)

while True:
    host, msg = e.recv()
    if msg:
        if msg == b'end':
            print('End received')
            break
        if len(msg) == 20:  # 5 floats * 4 bytes
            floats = struct.unpack('<5f', msg)
            print('Received floats:', floats)
            temperature=floats[0]
            pressure=floats[1]
            display.draw_text8x8(10,52, 'remote temperature: ', WHITE, background=BLACK)
            display.draw_text8x8(180,52, str(temperature), WHITE, background=BLUE)
            
            display.draw_text8x8(10,68, 'remote pressure: ', WHITE, background=BLACK)
            display.draw_text8x8(180,68, str(pressure), WHITE, background=BLUE)