Lopy to Raspberry pie 3 via serial

[MusteDaniel]

Hello! Can anyone help me please? I want to send data from lopy to raspberry pie 3...I follow the instructions from other topics but I can t figure it out! Thank you!

lopy code:

import machine, time, pycom
pycom.heartbeat(False)
pycom.rgbled(0x000000)
#uart1 = UART(1, 115200, pins=("P3", "P4"))
uart1 = UART(1, 115300, bits=8, parity=None, stop=1)
uart1.init(baudrate=115200, bits=8, parity=None, stop=1)

while True:
uart1.write(b'send')
time.sleep(1)

raspberry code:

import serial
with serial.Serial('/dev/ttyS0', 115200, timeout=10) as ser:
print(ser.read(4))