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main og.py
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main og.py
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from network import LoRa
import socket
import time
import pycom
from machine import Timer
import crypto
from network import WLAN
from network import Bluetooth
import machine
######### Initialize the device #######################
lora = LoRa(mode=LoRa.LORA,power_mode=LoRa.ALWAYS_ON,region=LoRa.EU868)
s = socket.socket(socket.AF_LORA, socket.SOCK_RAW)
s.setblocking(False)
pycom.heartbeat(False)
wlan = WLAN()
wlan.deinit()
bluetooth = Bluetooth()
bluetooth.deinit()
######### Own node's information #####################
my_number=2
source_address='Mac'+str(my_number)
number_of_neighbours=3
######### Initialize the timers #######################
chrono = Timer.Chrono()
chrono1=Timer.Chrono()
chrono2=Timer.Chrono()
chrono3=Timer.Chrono()
############ Configurable Parameters #################
wakeup_interval=20
fast_sleep_threshold=2.5
transmission_type='Broadcast'#Unicast or Broadcast
num_of_packets=4
pll_threshold=7
cca_duration=0.08
cca_interval=0.4
rssi_threshold=100
packet_size=255
############ Configuring the device ####################
packet_number=1
transmissions=0
alive_time=0
phase_lock_time_saving=0
saved_transmissions=0
failed_attempts=0
phase_lock_cca_fails=0
Awake_instance=0
broadcast_time_save=0
fast_sleep_time_save=0
Full_send_time=0
Tx_time=0
Rx_time=0
ack=False
only_listen=False
noise_detected_counter=0
ack_data_packets=[]
cca_list=[]
received_time=[]
received_full_data=[]
phase_lock_optimization={}
phase_lock_optimization_time={}
max_wait_time=1*wakeup_interval
lora_off_time=0.6
packet_gap_interval=0.5
pll_activation=2.0
sleep_in_pll=1.9
transmission_in_pll=1.8
############## Delay to avoid CCA overalap ############
number2=(wakeup_interval-2)/10
print((my_number-1)*number2)
time.sleep((my_number-1)*number2)
############## Random number generation ################
def Random():
r = crypto.getrandbits(32)
return ((r[0]<<24)+(r[1]<<16)+(r[2]<<8)+r[3])/4294967295.0
def RandomRange(rfrom, rto):
return Random()*(rto-rfrom)+rfrom
############## Random packet generation ################
def packet_check(s=Awake_instance,g=packet_number,h=source_address,f=num_of_packets):
number=int(RandomRange(1, 30))
if packet_number<num_of_packets and 4<number<20:
return True
else:
return False
############## Clear Channel Assessment ################
def cca(x=packet_gap_interval,f=lora_off_time,c=cca_list,d=chrono,l=lora,h=cca_duration,m=rssi_threshold,n=cca_interval):
chrono1.start()
while chrono1.read()<cca_duration:
c.append(str(lora.ischannel_free(-rssi_threshold)))
chrono1.stop()
chrono1.reset()
chrono.stop()
if 'False' in cca_list:
return False
else:
chrono1.start()
while chrono1.read()<cca_interval:
l = LoRa(power_mode=LoRa.SLEEP,region=LoRa.EU868)
l = LoRa(power_mode=LoRa.ALWAYS_ON,region=LoRa.EU868)
chrono1.stop()
chrono1.reset()
chrono.start()
chrono1.start()
while chrono1.read()<cca_duration:
c.append(str(lora.ischannel_free(-rssi_threshold)))
chrono1.stop()
chrono1.reset()
if 'False' in cca_list:
return False
else:
return True
############# Neighbor Discovery #########################
neighbour_discover=False
neighbor_adresses=[]
while not neighbour_discover:
number=int(RandomRange(1, 2))
if number!=my_number:
neighbor='Mac'+str(number)
#if neighbor not in neighbor_adresses
neighbor_adresses.append(neighbor)
if len(neighbor_adresses)==number_of_neighbours:
break
print(neighbor_adresses)
Broadcast_address='All'
neighbor=0
############# Contiki MAC #########################
while True:
chrono.start()
chrono3.start()
channel_status=cca(chrono,cca_list)
channel_status = True
packet_status=packet_check(Awake_instance,packet_number)
lora = LoRa(power_mode=LoRa.ALWAYS_ON,region=LoRa.EU868)
while len(s.recv(packet_size))>0:
ss=s.recv(packet_size)
events=lora.events()
if channel_status and packet_status and not only_listen:
########### Transmit Data ##########################
lora = LoRa(power_mode=LoRa.ALWAYS_ON,region=LoRa.EU868)
print('Sending Data')
send_time=0
data = ' Data '
cca_time=chrono.read()
cca_list.clear()
if transmission_type=='Unicast':
########### Unicast Transmission ##########################
send_time_updated=False
if ack:
neighbor+=1
if neighbor>= len(neighbor_adresses):
neighbor=0
destination_address=neighbor_adresses[neighbor]
safe_time=packet_gap_interval+0.2
channel_checked=True
ack=False
Phase_Lock_channel_check=False
phase_lock_transmissions=0
if destination_address in phase_lock_optimization_time and float(phase_lock_optimization_time.get(destination_address))>=pll_activation :
########### PLL optimization ##########################
while float(phase_lock_optimization_time.get(destination_address))-sleep_in_pll > chrono.read():
lora = LoRa(power_mode=LoRa.SLEEP,region=LoRa.EU868)
while not ack and chrono.read()< max_wait_time:
if float(phase_lock_optimization_time.get(destination_address))-transmission_in_pll <= chrono.read() and phase_lock_transmissions<pll_threshold:
########### Transmission with PLL ##########################
if channel_checked:
phase_lock_time_saving=phase_lock_time_saving+chrono.read()-cca_time
channel_checked= False
lora = LoRa(power_mode=LoRa.ALWAYS_ON,region=LoRa.EU868)
if cca():
########### Chaneel is free and transmission with PLL starts ##########################
packet1=source_address+' ' +' '+ destination_address+' ' + data + str(packet_number) +' '+str(send_time)+' '+str(chrono.read())+' '
padding=packet_size-len(packet1)
zero_padding='0'*padding
packet=packet1+zero_padding
s.send(packet)
transmissions+=1
phase_lock_transmissions+=1
print(packet1)
else:
########### Channel is busy ##########################
phase_lock_cca_fails+=1
Phase_Lock_channel_check=True
break
else:
packet1=source_address+' ' +' '+ destination_address+' ' + data + str(packet_number) +' '+str(send_time)+' '+str(chrono.read())+' '
padding=packet_size-len(packet1)
zero_padding='0'*padding
packet=packet1+zero_padding
s.send(packet)
transmissions+=1
phase_lock_transmissions+=1
print(packet1)
elif phase_lock_transmissions >= pll_threshold:
########### If neighbour is not responding remove neighbour from PLL ##########################
phase_lock_optimization.pop(destination_address)
print(phase_lock_optimization)
phase_lock_optimization_time.pop(destination_address)
print(phase_lock_optimization_time)
break
else:
saved_transmissions+=1
if not send_time_updated and chrono.read()> wakeup_interval-safe_time:
send_time_updated=True
Full_send_time=send_time-1
print(Full_send_time)
########### Receiving the Acknowledgement ##########################
time.sleep(packet_gap_interval)
rcv_packet1=str(s.recv(packet_size))
rcv_packet1=rcv_packet1[2:-1]
decode_packet=rcv_packet1.split()
if len(decode_packet)>=5:
if decode_packet[3]==str(packet_number) and decode_packet[1]==source_address:
if send_time_updated:
period=int(decode_packet[4])//Full_send_time
phase_lock_optimization[decode_packet[0]]=int(decode_packet[4])-(Full_send_time+3)*period
else:
phase_lock_optimization[decode_packet[0]]=decode_packet[4]
phase_lock_optimization_time[decode_packet[0]]=decode_packet[5]
print(phase_lock_optimization)
print(phase_lock_optimization_time)
print('Ack received for packet {}'.format (packet_number))
ack_data_packets.append(rcv_packet1)
print(len(ack_data_packets))
packet_number+=1
ack=True
send_time+=1
else:
########### Transmission without PLL ##########################
while not ack and chrono.read()< max_wait_time:
########### Transmission continue until the acknowledgement ##########################
packet1=source_address+' ' +' '+ destination_address+' ' + data + str(packet_number) +' '+str(send_time)+' '+str(chrono.read())+' '
padding=packet_size-len(packet1)
zero_padding='0'*padding
packet=packet1+zero_padding
s.send(packet)
print(packet1)
transmissions+=1
if not send_time_updated and chrono.read()> wakeup_interval-safe_time:
send_time_updated=True
Full_send_time=send_time-1
print(Full_send_time)
########### Receiving the Acknowledgement ##########################
time.sleep(packet_gap_interval)
rcv_packet1=str(s.recv(packet_size))
rcv_packet1=rcv_packet1[2:-1]
decode_packet=rcv_packet1.split()
if len(decode_packet)>=5:
if decode_packet[3]==str(packet_number) and decode_packet[1]==source_address:
if send_time_updated:
period=int(decode_packet[4])//Full_send_time
phase_lock_optimization[decode_packet[0]]=int(decode_packet[4])-(Full_send_time+3)*period
else:
phase_lock_optimization[decode_packet[0]]=decode_packet[4]
phase_lock_optimization_time[decode_packet[0]]=decode_packet[5]
print(phase_lock_optimization)
print(phase_lock_optimization_time)
print('Ack received for packet {}'.format (packet_number))
ack_data_packets.append(rcv_packet1)
print(len(ack_data_packets))
packet_number+=1
ack=True
send_time+=1
if chrono.read()>= max_wait_time:
########### Remove not responding neighbours ##########################
neighbor_adresses.remove(destination_address)
print(neighbor_adresses)
if len(neighbor_adresses)==0:
########### If there are no neighbours only perform packet reception ##########################
only_listen=True
if not ack and destination_address !=Broadcast_address and not Phase_Lock_channel_check:
########### Identify transmission failures ##########################
failed_attempts+=1
alive_time+=chrono.read()
print('Awake_instance {}'.format (Awake_instance))
print('Packets {}'.format (packet_number))
print('Duty_Cycle {}'.format ((alive_time/3600)*100))
time_left=wakeup_interval-(chrono3.read()%wakeup_interval)
chrono.stop()
chrono.reset()
chrono.start()
while chrono.read()<time_left:
lora = LoRa(power_mode=LoRa.SLEEP,region=LoRa.EU868)
pycom.rgbled(0x7f0000)
pass
lora = LoRa(power_mode=LoRa.ALWAYS_ON,region=LoRa.EU868)
chrono.stop()
chrono.reset()
print(chrono3.read())
if chrono3.read()>wakeup_interval:
insatnce=chrono3.read()//wakeup_interval
Awake_instance+=insatnce
else:
Awake_instance+=1
chrono3.stop()
chrono3.reset()
print(' ')
else:
########### Broadcast Transmission ##########################
print('Awake_instance {}'.format (Awake_instance))
print('Source_address {}'.format (source_address))
print('Packets {}'.format (packet_number))
destination_address=Broadcast_address
safe_time=packet_gap_interval+lora_off_time
########### Broadcast Transmission continue during full wake up interval ##########################
while chrono.read()< wakeup_interval-safe_time:
print('Broadcast loop', chrono.read(), wakeup_interval-safe_time)
data = ' Data '
packet1=source_address+' ' +' '+ destination_address+' ' + data + str(packet_number) +' '+str(send_time)+' '
padding=packet_size-len(packet1)
zero_padding='0'*padding
packet=packet1+zero_padding
lora = LoRa(power_mode=LoRa.ALWAYS_ON,region=LoRa.EU868)
s.send(packet)
print(packet1)
chrono2.start()
while chrono2.read()<packet_gap_interval:
lora = LoRa(power_mode=LoRa.SLEEP,region=LoRa.EU868)
chrono2.stop()
chrono2.reset()
transmissions+=1
broadcast_time_save+=packet_gap_interval
send_time+=1
packet_number+=1
alive_time+=chrono.read()
Awake_instance+=1
time_left= wakeup_interval-chrono3.read()
chrono.stop()
chrono.reset()
chrono.start()
while chrono.read()<time_left:
lora = LoRa(power_mode=LoRa.SLEEP,region=LoRa.EU868)
pycom.rgbled(0x7f0000)
pass
lora = LoRa(power_mode=LoRa.ALWAYS_ON,region=LoRa.EU868)
pycom.rgbled(0x007f00)
chrono.stop()
chrono.reset()
print(chrono3.read())
chrono3.stop()
chrono3.reset()
print(' ')
elif not channel_status :
########### Packet transmission detected and set to receive moode ##########################
noise_found=True
print('Receiving Data')
time_now=chrono3.read()
########### Fast sleep optimization ##########################
while chrono3.read()<(packet_gap_interval*1.1+time_now):
cca_list.append(str(lora.ischannel_free(-100)))
if cca_list.count('True')<=10 and chrono3.read()>(packet_gap_interval+time_now):
print(cca_list.count('True'))
print(chrono3.read())
noise_found=False
print('Noise Detected')
noise_detected_counter+=1
break
lora = LoRa(power_mode=LoRa.ALWAYS_ON,region=LoRa.EU868)
cca_list.clear()
event=0
while event !=1 and noise_found:
event=lora.events()
if chrono3.read() >= fast_sleep_threshold:
fast_sleep_time_save+=wakeup_interval-fast_sleep_threshold
break
########### Packet reception ##########################
rcv_packet=str(s.recv(packet_size))
rcv_packet=rcv_packet[2:-1]
decode_packet=rcv_packet.split()
if len(decode_packet)>=6:
receiving_data= decode_packet[0] + ' '+decode_packet[2] +' '+decode_packet[3]
if decode_packet[1]== source_address:
########### Unicast packet reception ##########################
received_full_data.append(receiving_data)
ack_packet= decode_packet[1] +' '+decode_packet[0]+ ' Ack ' + decode_packet[3]+' '+decode_packet[4]+' '+decode_packet[5]
print('sending ack')
print(ack_packet)
s.send(ack_packet)
elif decode_packet[1]== Broadcast_address:
########### Broadcast packet reception ##########################
received_full_data.append(receiving_data)
else:
print('Not For me')
else:
print('Unexpected Packet')
pass
########### Information about received packets ##########################
print(len(received_full_data))
alive_time+=chrono.read()
print('Awake_instance {}'.format (Awake_instance))
print('Source_address {}'.format (source_address))
print('Alive_time {}'.format (alive_time))
print('Packets {}'.format (packet_number))
print('Duty_Cycle {}'.format ((alive_time/3600)*100))
if transmission_type=='Unicast':
########### Unicast Information ##########################
print('Packets_Received {}'.format (len(received_full_data)))
print('failed_attempts {}'.format (failed_attempts))
print('phase_lock_time_saving {}'.format (phase_lock_time_saving))
print('phase_lock_cca_fails {}'.format (phase_lock_cca_fails))
print('Optimized_Duty_Cycle_Unicast {}'.format (((alive_time-phase_lock_time_saving)/3600)*100))
print('Transmissions {}'.format (transmissions+saved_transmissions))
print('Optimized_Transmissions {}'.format (transmissions))
else:
########### Broadcast Information ##########################
print('Optimized_Duty_Cycle_broadcast {}'.format (((alive_time-broadcast_time_save)/3600)*100))
print('Packets_Received {}'.format (len(received_full_data)))
print('Transmissions {}'.format (transmissions))
print('noise_detected_counter {}'.format (noise_detected_counter))
print('fast_sleep_time_save {}'.format (fast_sleep_time_save))
time_left= wakeup_interval-chrono3.read()
chrono.stop()
chrono.reset()
chrono.start()
Awake_instance+=1
while chrono.read()< time_left:
pycom.rgbled(0x7f0000)
lora = LoRa(power_mode=LoRa.SLEEP,region=LoRa.EU868)
pass
lora = LoRa(power_mode=LoRa.ALWAYS_ON,region=LoRa.EU868)
pycom.rgbled(0x007f00)
chrono.stop()
chrono.reset()
print(chrono3.read())
chrono3.stop()
chrono3.reset()
print(' ')
else:
########### No Packet to transmit so going back to sleep mode ##########################
print('Going back to Sleep')
print('Awake_instance {}'.format (Awake_instance))
print('Source_address {}'.format (source_address))
cca_list.clear()
alive_time+=chrono.read()
print('Alive_time {}'.format (alive_time))
print('Packets {}'.format (packet_number))
print('Duty_Cycle {}'.format ((alive_time/3600)*100))
if transmission_type=='Unicast':
########### Unicast Information ##########################
print('Packets_Received {}'.format (len(received_full_data)))
print('failed_attempts {}'.format (failed_attempts))
print('phase_lock_time_saving {}'.format (phase_lock_time_saving))
print('phase_lock_cca_fails {}'.format (phase_lock_cca_fails))
print('Optimized_Duty_Cycle_Unicast {}'.format (((alive_time-phase_lock_time_saving)/3600)*100))
print('Transmissions {}'.format (transmissions+saved_transmissions))
print('Optimized_Transmissions {}'.format (transmissions))
else:
########### Broadcast Information ##########################
print('Optimized_Duty_Cycle_broadcast {}'.format (((alive_time-broadcast_time_save)/3600)*100))
print('Packets_Received {}'.format (len(received_full_data)))
print('Transmissions {}'.format (transmissions))
print('noise_detected_counter {}'.format (noise_detected_counter))
print('fast_sleep_time_save {}'.format (fast_sleep_time_save))
Awake_instance+=1
while chrono3.read()< wakeup_interval:
lora = LoRa(power_mode=LoRa.SLEEP,region=LoRa.EU868)
pycom.rgbled(0x7f0000)
pass
lora = LoRa(power_mode=LoRa.ALWAYS_ON,region=LoRa.EU868)
pycom.rgbled(0x007f00)
chrono.stop()
chrono.reset()
print(chrono3.read())
chrono3.stop()
chrono3.reset()
print(' ')