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import os
import subprocess
import signal
import serial
import select
from time import sleep
BluetoothProcess = subprocess.Popen(["python", "-u", "bt.py"], stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE, text=True)
# Waiting on connection
print(BluetoothProcess.stdout.readline().strip())
# Connected?
# Bluetooth output
bto = BluetoothProcess.stdout.readline().strip()
print(bto)
newCommand = False
rightTurnIndex = 5
rightTurn = 0
leftTurnIndex = 2
leftTurn = 0
if bto.find("Connected") != -1:
# Open serial port to Arduino Nano
NANO = serial.Serial('/dev/ttyUSB0', 9600, timeout=1)
# LIDAR Process Code
LIDARProcess = subprocess.Popen(["./LIDARProg", "--channel", "--serial", "/dev/ttyUSB1", "460800"], stdout=open(os.devnull, 'wb'))
print(f"LIDAR PID: {LIDARProcess.pid}")
# DWM Process Code
DWMProcess = subprocess.Popen(["python", "DWM.py"], stdout=open(os.devnull, 'wb'))
print(f"DWM PID: {DWMProcess.pid}")
while bto != "1000":
ready, _, _ = select.select([BluetoothProcess.stdout], [], [], 0.01)
if ready:
bto = BluetoothProcess.stdout.readline().strip()
newCommand = True
else:
newCommand = False
# Send commands to Arduino based on bto
if rightTurn > 0:
NANO.write(b"Right\n")
rightTurn = rightTurn - 1
if rightTurn == 0:
NANO.write(b"00")
if leftTurn > 0:
NANO.write(b"Left\n")
leftTurn = leftTurn - 1
if leftTurn == 0:
NANO.write(b"00")
if newCommand:
if bto == "11":
NANO.write(b"Forward\n")
elif bto == "22":
NANO.write(b"Backward\n")
elif bto == "33":
# NANO.write(b"Right\n")
rightTurn = rightTurnIndex
leftTurn = 0
elif bto == "44":
# NANO.write(b"Left\n")
leftTurn = leftTurnIndex
rightTurn = 0
elif bto == "0":
NANO.write(b"Stop\n")
print("Terminating Serial port to Arduino Nano")
NANO.write(b"Stop\n")
print("Terminating LIDAR process")
os.kill(LIDARProcess.pid, signal.SIGINT)
print("Terminating DWM Process")
os.kill(DWMProcess.pid, signal.SIGINT)
print("Terminating Bluetooth Process")
os.kill(BluetoothProcess.pid, signal.SIGINT)
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