#!/usr/bin/env pybricks-micropython

# Before running this program, make sure the client and server EV3 bricks are
# paired using Bluetooth, but do NOT connect them. The program will take care
# of establishing the connection.

# The server must be started before the client!

from pybricks.messaging import BluetoothMailboxServer, TextMailbox

server = BluetoothMailboxServer()
mbox = TextMailbox("greeting", server)

# The server must be started before the client!
print("waiting for connection...")
server.wait_for_connection()
print("connected!")

# In this program, the server waits for the client to send the first message
# and then sends a reply.
mbox.wait()
print(mbox.read())
mbox.send("hello to you!")