#!/usr/bin/env python3
import time, serial

ZED_PORT  = "/dev/serial/by-id/usb-u-blox_AG_-_www.u-blox.com_u-blox_GNSS_receiver-if00"
ZED_BAUD  = 115200

LORA_PORT = "/dev/serial/by-id/usb-1a86_USB_Serial-if00-port0"
LORA_BAUD = 9600

READ_CHUNK = 4096

def main():
    zed  = serial.Serial(ZED_PORT,  ZED_BAUD,  timeout=0.2)
    lora = serial.Serial(LORA_PORT, LORA_BAUD, timeout=0.2)
    try:
        last = time.time()
        n_in = 0
        while True:
            data = zed.read(READ_CHUNK)
            if data:
                lora.write(data)
                n_in += len(data)
            else:
                time.sleep(0.005)

            # einfache Durchsatzanzeige alle 5s
            now = time.time()
            if now - last >= 5:
                print(f"rtcm forwarded: {n_in/ (now-last):.0f} B/s")
                last = now
                n_in = 0
    finally:
        try: zed.close()
        except: pass
        try: lora.close()
        except: pass

if __name__ == "__main__":
    main()