#!/usr/bin/env python3
"""
Serial receive test – single file. Run on Pico (RX side).
Wire: ESP32 TX (GPIO17) → Pico RX (GPIO1); GND ↔ GND. Run send test on ESP32.
  mpremote run pico/test/test_serial_receive.py
"""
import time
import sys
from machine import UART, Pin

if "esp32" in sys.platform:
    UART_ID, TX_PIN, RX_PIN, BAUD = 1, 17, 18, 115200
else:
    UART_ID, TX_PIN, RX_PIN, BAUD = 0, 0, 1, 115200

print("UART receive: %s UART%d TX=%s RX=%s %d baud (10 s)" % (sys.platform, UART_ID, TX_PIN, RX_PIN, BAUD))
uart = UART(UART_ID, baudrate=BAUD, tx=Pin(TX_PIN, Pin.OUT), rx=Pin(RX_PIN, Pin.IN))
buf = bytearray()
deadline = time.ticks_add(time.ticks_ms(), 10000)
while time.ticks_diff(deadline, time.ticks_ms()) > 0:
    n = uart.any()
    if n:
        buf.extend(uart.read(n))
    while b"\n" in buf:
        idx = buf.index(b"\n")
        line = bytes(buf[:idx]).strip()
        buf = buf[idx + 1:]
        if line:
            print("rx:", line.decode("utf-8", "replace"))
    time.sleep_ms(10)
uart.deinit()
print("Receive test done.")