pycom.heartbeat(False)
led = pyLED()
print("enabling Lora...")
lora_active = False
while not lora_active:
try:
lora = LoRa(mode=LoRa.LORA, region=LoRa.EU868)
lora_active = True
except Exception as e:
print("DISASTER! exception opening Lora: " + str(e))
time.sleep(2)
print("enabling Pymesh...")
try:
mesh = lora.Mesh()
except Exception as e:
print("DISASTER! exception creating mesh: " + str(e))
sys.exit()
time.sleep(2)
cstate = mesh.state()
while (
cstate < 2
): # exits when either "PYMESH_ROLE_CHILD", "PYMESH_ROLE_ROUTER" or "PYMESH_ROLE_LEADER"
print("%d: looping... [%s]" % (time.time(), PYMESHSTATE[cstate]))
time.sleep(2)
cstate = mesh.state()
led.flashLED("green")
class Loramesh:
""" Class for using Lora Mesh - openThread """
STATE_DISABLED = const(0)
STATE_DETACHED = const(1)
STATE_CHILD = const(2)
STATE_ROUTER = const(3)
STATE_LEADER = const(4)
STATE_LEADER_SINGLE = const(5)
# rgb LED color for each state: disabled, detached, child, router, leader and single leader
#RGBLED = [0x0A0000, 0x0A0000, 0x0A0A0A, 0x000A00, 0x00000A, 0x0A000A]
RGBLED = [0x0A0000, 0x0A0000, 0x0A0A0A, 0x000A00, 0x0A000A, 0x000A0A]
# TTN conf mode
#RGBLED = [0x200505, 0x200505, 0x202020, 0x052005, 0x200020, 0x001818]
# for outside/bright sun
#RGBLED = [0xFF0000, 0xFF0000, 0x808080, 0x00FF00, 0x0000FF, 0xFF00FF]
# mesh node state string
STATE_STRING_LIST = ['Disabled', 'Detached', 'Child', 'Router', 'Leader']
# address to be used for multicasting
MULTICAST_MESH_ALL = 'ff03::1'
MULTICAST_MESH_FTD = 'ff03::2'
MULTICAST_LINK_ALL = 'ff02::1'
MULTICAST_LINK_FTD = 'ff02::2'
# Leader has an unicast IPv6: fdde:ad00:beef:0:0:ff:fe00:fc00
LEADER_DEFAULT_RLOC = 'fc00'
def __init__(self, config):
""" Constructor """
self.config = config
config_lora = config.get('LoRa')
self.lora = LoRa(mode=LoRa.LORA,
region=config_lora.get("region"),
frequency=config_lora.get("freq"),
bandwidth=config_lora.get("bandwidth"),
sf=config_lora.get("sf"))
self.mesh = self.lora.Mesh() #start Mesh
# get Lora MAC address
#self.MAC = str(ubinascii.hexlify(lora.mac()))[2:-1]
self.MAC = int(str(ubinascii.hexlify(self.lora.mac()))[2:-1], 16)
#last 2 letters from MAC, as integer
self.mac_short = self.MAC & 0xFFFF #int(self.MAC[-4:], 16)
print_debug(
5, "LoRa MAC: %s, short: %s" % (hex(self.MAC), self.mac_short))
self.rloc16 = 0
self.rloc = ''
self.net_addr = ''
self.ip_eid = ''
self.ip_link = ''
self.state = STATE_DISABLED
# a dictionary with all direct neighbors
# key is MAC for each neighbor
# value is pair (age, mac, rloc16, role, rssi)
#self.neigh_dict = {}
self.router_data = RouterData()
self.router_data.mac = self.MAC
# a dictionary with all routers direct neighbors
# key is MAC for each router
# value is pair (age, rloc, neigh_num, (age, mac, rloc16, role, rssi))
#self.leader_dict = {}
self.leader_data = LeaderData()
self.leader_data.mac = self.MAC
# set of all MACS from whole current Mesh Network
self.macs = set()
self.macs_ts = -65535 # very old
# list of all pairs (direct radio connections) inside Mesh
self.connections = list()
self.connections_ts = -65535 # very old
# set a new unicast address
self.unique_ip_prefix = "fdde:ad00:beef:0::"
command = "ipaddr add " + self.ip_mac_unique(self.mac_short)
self.mesh.cli(command)
def ip_mac_unique(self, mac):
ip = self.unique_ip_prefix + hex(mac & 0xFFFF)[2:]
return ip
def update_internals(self):
self._state_update()
self._rloc16_update()
self._update_ips()
self._rloc_ip_net_addr()
def _rloc16_update(self):
self.rloc16 = self.mesh.rloc()
return self.rloc16
def _update_ips(self):
""" Updates all the unicast IPv6 of the Thread interface """
ips = self.mesh.ipaddr()
for line in ips:
if line.startswith('fd'):
# Mesh-Local unicast IPv6
try:
addr = int(line.split(':')[-1], 16)
except Exception:
continue
if addr == self.rloc16:
# found RLOC
# RLOC IPv6 has x:x:x:x:0:ff:fe00:RLOC16
self.rloc = line
elif ':0:ff:fe00:' not in line:
# found Mesh-Local EID
self.ip_eid = line
elif line.startswith('fe80'):
# Link-Local
self.ip_link = line
def is_connected(self):
""" Returns true if it is connected if its Child, Router or Leader """
connected = False
if self.state in (STATE_CHILD, STATE_ROUTER, STATE_LEADER,
STATE_LEADER_SINGLE):
connected = True
return connected
def _state_update(self):
""" Returns the Thread role """
self.state = self.mesh.state()
if self.state < 0:
self.state = self.STATE_DISABLED
return self.state
def _rloc_ip_net_addr(self):
""" returns the family part of RLOC IPv6, without last word (2B) """
self.net_addr = ':'.join(self.rloc.split(':')[:-1]) + ':'
return self.net_addr
def state_string(self):
if self.state >= len(self.STATE_STRING_LIST):
return 'none'
return self.STATE_STRING_LIST[self.state]
def led_state(self):
""" Sets the LED according to the Thread role """
if self.state == STATE_LEADER and self.mesh.single():
pycom.rgbled(0x000A0A)
time.sleep(1)
pycom.rgbled(0)
elif self.state == STATE_DETACHED:
pycom.rgbled(0x0A0000)
time.sleep(1)
pycom.rgbled(0)
else:
do_nothing = "yes"
# pycom.rgbled(self.RGBLED[self.state])
def ip(self):
""" Returns the IPv6 RLOC """
return self.rloc
# def parent_ip(self):
# # DEPRECATED, unused
# """ Returns the IP of the parent, if it's child node """
# ip = None
# state = self.state
# if state == STATE_CHILD or state == STATE_ROUTER:
# try:
# ip_words = self.rloc.split(':')
# parent_rloc = int(self.lora.cli('parent').split('\r\n')[1].split(' ')[1], 16)
# ip_words[-1] = hex(parent_rloc)[2:]
# ip = ':'.join(ip_words)
# except Exception:
# pass
# return ip
# def neighbors_ip(self):
# # DEPRECATED, unused
# """ Returns a list with IP of the neighbors (children, parent, other routers) """
# state = self.state
# neigh = []
# if state == STATE_ROUTER or state == STATE_LEADER:
# ip_words = self.rloc.split(':')
# # obtain RLOC16 neighbors
# neighbors = self.lora.cli('neighbor list').split(' ')
# for rloc in neighbors:
# if len(rloc) == 0:
# continue
# try:
# ip_words[-1] = str(rloc[2:])
# nei_ip = ':'.join(ip_words)
# neigh.append(nei_ip)
# except Exception:
# pass
# elif state == STATE_CHILD:
# neigh.append(self.parent_ip())
# return neigh
# def cli(self, command):
# """ Simple wrapper for OpenThread CLI """
# return self.mesh.cli(command)
def ipaddr(self):
""" returns all unicast IPv6 addr """
return self.mesh.ipaddr()
# def ping(self, ip):
# """ Returns ping return time, to an IP """
# res = self.cli('ping ' + str(ip))
# """
# '8 bytes from fdde:ad00:beef:0:0:ff:fe00:e000: icmp_seq=2 hlim=64 time=236ms\r\n'
# 'Error 6: Parse\r\n'
# no answer
# """
# ret_time = -1
# try:
# ret_time = int(res.split('time=')[1].split('ms')[0])
# except Exception:
# pass
# return ret_time
def blink(self, num=3, period=.5, color=None):
""" LED blink """
if color is None:
color = self.RGBLED[self.state]
for _ in range(num):
pycom.rgbled(0)
time.sleep(period)
pycom.rgbled(color)
time.sleep(period)
self.led_state()
def slow_blink():
# supposed to be for continually blink status in a thread till state change
color = self.RGBLED[self.state]
for _ in range(num):
pycom.rgbled(0)
time.sleep(1)
pycom.rgbled(color)
time.sleep(1)
pycom.rgbled(0)
def neighbors_update(self):
""" update neigh_dict from cli:'neighbor table' """
""" >>> print(lora.cli("neighbor table"))
| Role | RLOC16 | Age | Avg RSSI | Last RSSI |R|S|D|N| Extended MAC |
+------+--------+-----+----------+-----------+-+-+-+-+------------------+
| C | 0x2801 | 219 | 0 | 0 |1|1|1|1| 0000000000000005 |
| R | 0x7400 | 9 | 0 | 0 |1|0|1|1| 0000000000000002 |
"""
x = self.mesh.neighbors()
print_debug(3, "Neighbors Table: %s" % x)
if x is None:
# bad read, just keep previous neigbors
return
# clear all pre-existing neigbors
self.router_data = RouterData()
self.router_data.mac = self.MAC
self.router_data.rloc16 = self.rloc16
self.router_data.role = self.state
self.router_data.ts = time.time()
self.router_data.coord = Gps.get_location()
for nei_rec in x:
# nei_rec = (role=3, rloc16=10240, rssi=0, age=28, mac=5)
age = nei_rec.age
if age > 300:
continue # shouln't add neighbors too old
role = nei_rec.role
rloc16 = nei_rec.rloc16
# maybe we shouldn't add Leader (because this info is already available at Leader)
# if rloc16 == self.leader_rloc():
# continue
rssi = nei_rec.rssi
mac = nei_rec.mac
neighbor = NeighborData((
mac,
age,
rloc16,
role,
rssi,
))
self.router_data.add_neighbor(neighbor)
#print("new Neighbor: %s"%(neighbor.to_string()))
#except:
# pass
# add own info in dict
#self.neigh_dict[self.MAC] = (0, self.rloc16, self.state, 0)
print_debug(3, "Neighbors: %s" % (self.router_data.to_string()))
return
def leader_add_own_neigh(self):
""" leader adds its own neighbors in leader_dict """
self.leader_data.add_router(self.router_data)
return
def neighbors_pack(self):
""" packs in a struct all neighbors as (MAC, RLOC16, Role, rssi, age) """
data = self.router_data.pack()
return data
def routers_neigh_update(self, data_pack):
""" unpacks the PACK_ROUTER_NEIGHBORS, adding them in leader_dict """
# key is MAC for each router
# value is pair (age, rloc, neigh_num, (age, mac, rloc16, role, rssi))
router = RouterData(data_pack)
self.leader_data.add_router(router)
return
def leader_dict_cleanup(self):
""" cleanup the leader_dict for old entries """
#print("Leader Data before cleanup: %s"%self.leader_data.to_string())
self.leader_data.cleanup()
print("Leader Data : %s" % self.leader_data.to_string())
def routers_rloc_list(self, age_min, resolve_mac=None):
""" return list of all routers IPv6 RLOC16
if mac parameter is present, then returns just the RLOC16 of that mac, if found
"""
mac_ip = None
data = self.mesh.routers()
print("Routers Table: ", data)
'''>>> print(lora.cli('router table'))
| ID | RLOC16 | Next Hop | Path Cost | LQ In | LQ Out | Age | Extended MAC |
+----+--------+----------+-----------+-------+--------+-----+------------------+
| 12 | 0x3000 | 63 | 0 | 0 | 0 | 0 | 0000000000000002 |'''
if data is None:
# bad read
return ()
net_addr = self.net_addr
routers_list = []
for line in data:
# line = (mac=123456, rloc16=20480, id=20, path_cost=0, age=7)
age = line.age
if age > 300:
continue # shouldn't add/resolve very old Routers
rloc16 = line.rloc16
# check if it's own rloc16
if rloc16 == self.rloc16:
continue
if resolve_mac is not None:
if resolve_mac == line.mac:
mac_ip = rloc16
break
# look for this router in Leader Data
# if doesn't exist, add it to routers_list with max ts
# if it exists, just add it with its ts
last_ts = self.leader_data.get_mac_ts(line.mac)
if time.time() - last_ts < age_min:
continue # shouldn't add/resolve very "recent" Routers
ipv6 = net_addr + hex(rloc16)[2:]
routers_list.append((last_ts, ipv6))
if resolve_mac is not None:
print("Mac found in Router %s" % str(mac_ip))
return mac_ip
# sort the list in the ascending values of timestamp
routers_list.sort()
print("Routers list %s" % str(routers_list))
return routers_list
def leader_data_pack(self):
""" creates packet with all Leader data, leader_dict """
self.leader_data.rloc16 = self.rloc16
data = self.leader_data.pack()
return data
def leader_data_unpack(self, data):
self.leader_data = LeaderData(data)
print("Leader Data : %s" % self.leader_data.to_string())
return self.leader_data.ok
def neighbor_resolve_mac(self, mac):
mac_ip = self.router_data.resolve_mac(mac)
return mac_ip
def resolve_mac_from_leader_data(self, mac):
mac_ip = self.leader_data.resolve_mac(mac)
print("Mac %x found as IP %s" % (mac, str(mac_ip)))
return mac_ip
def macs_get(self):
""" returns the set of the macs, hopefully it was received from Leader """
#print("Macs: %s"%(str(self.macs)))
return (self.macs, self.macs_ts)
def macs_set(self, data):
MACS_FMT = '!H'
field_size = calcsize(MACS_FMT)
#print("Macs pack: %s"%(str(data)))
n, = unpack(MACS_FMT, data)
#print("Macs pack(%d): %s"%(n, str(data)))
index = field_size
self.macs = set()
for _ in range(n):
mac, = unpack(MACS_FMT, data[index:])
self.macs.add(mac)
#print("Macs %d, %d: %s"%(index, mac, str(self.macs)))
index = index + field_size
self.macs_ts = time.time()
pass
def connections_get(self):
""" returns the list of all connections inside Mesh, hopefully it was received from Leader """
return (self.connections, self.connections_ts)
def connections_set(self, data):
CONNECTIONS_FMT = '!HHb'
field_size = calcsize(CONNECTIONS_FMT)
n, = unpack('!H', data)
index = calcsize('!H')
self.connections = list()
for _ in range(n):
#(mac1, mac2, rssi)
record = unpack(CONNECTIONS_FMT, data[index:])
self.connections.append(record)
index = index + field_size
self.connections_ts = time.time()
pass
def node_info_get(self, mac):
""" returns the RouterData or NeighborData for the specified mac """
#try to find it as router or a neighbor of a router
node, role = self.leader_data.node_info_mac(mac)
if node is None:
return {}
# try to create dict for RPC answer
data = {}
data['ip'] = node.rloc16
data['r'] = node.role
if role is self.STATE_CHILD:
data['a'] = node.age
elif role is self.STATE_ROUTER:
data['a'] = time.time() - node.ts
data['l'] = {'lat': node.coord[0], 'lng': node.coord[1]}
data['nn'] = node.neigh_num()
nei_macs = node.get_macs_set()
data['nei'] = list()
for nei_mac in nei_macs:
nei = node.dict[nei_mac]
data['nei'].append(
(nei.mac, nei.rloc16, nei.role, nei.rssi, nei.age))
return data
def node_info_set(self, data):
(role, ) = unpack('!B', data)
if role is self.STATE_ROUTER:
router = RouterData(data[1:])
self.leader_data.add_router(router)
print("Added as router %s" % router.to_string())
elif role is self.STATE_CHILD:
node = NeighborData(data[1:])
router = RouterData(node)
self.leader_data.add_router(router)
print("Added as Router-Neigh %s" % router.to_string())
pass
class Loramesh:
""" Class for using Lora Mesh - openThread """
STATE_DISABLED = const(0)
STATE_DETACHED = const(1)
STATE_CHILD = const(2)
STATE_ROUTER = const(3)
STATE_LEADER = const(4)
STATE_LEADER_SINGLE = const(5)
# rgb LED color for each state: disabled, detached, child, router, leader and single leader
RGBLED = [0x0A0000, 0x0A0000, 0x0A0A0A, 0x000A00, 0x0A000A, 0x000A0A]
# address to be used for multicasting
MULTICAST_MESH_ALL = 'ff03::1'
MULTICAST_MESH_FTD = 'ff03::2'
MULTICAST_LINK_ALL = 'ff02::1'
MULTICAST_LINK_FTD = 'ff02::2'
def __init__(self, lora=None):
""" Constructor """
if lora is None:
self.lora = LoRa(mode=LoRa.LORA,
region=LoRa.EU868,
bandwidth=LoRa.BW_125KHZ,
sf=7)
else:
self.lora = lora
self.mesh = self.lora.Mesh()
self.rloc = ''
self.ip_eid = ''
self.ip_link = ''
self.single = False
self.state = STATE_ROUTER
self.ip_others = []
def _state_update(self):
""" Returns the Thread role """
self.state = self.mesh.state()
if self.state < 0:
self.state = self.STATE_DISABLED
return self.state
def _rloc_ip_net_addr(self):
""" returns the family part of RLOC IPv6, without last word (2B) """
self.net_addr = ':'.join(self.rloc.split(':')[:-1]) + ':'
return self.net_addr
def _update_ips(self):
""" Updates all the unicast IPv6 of the Thread interface """
self.ip_others = []
ips = self.mesh.ipaddr()
self.rloc16 = self.mesh.rloc()
for line in ips:
if line.startswith('fd'):
# Mesh-Local unicast IPv6
try:
addr = int(line.split(':')[-1], 16)
except Exception:
continue
if addr == self.rloc16:
# found RLOC
# RLOC IPv6 has x:x:x:x:0:ff:fe00:RLOC16
self.rloc = line
elif ':0:ff:fe00:' not in line:
# found Mesh-Local EID
self.ip_eid = line
elif line.startswith('fe80'):
# Link-Local
self.ip_link = line
else:
self.ip_others.append(line)
def is_connected(self):
""" Returns true if it is connected as either Child, Router or Leader """
connected = False
self.state = self.mesh.state()
if self.state in (STATE_CHILD, STATE_ROUTER, STATE_LEADER,
STATE_LEADER_SINGLE):
connected = True
return connected
def led_state(self):
""" Sets the LED according to the Thread role """
if self.state == STATE_LEADER and self.mesh.single():
pycom.rgbled(self.RGBLED[self.STATE_LEADER_SINGLE])
else:
pycom.rgbled(self.RGBLED[self.state])
# returns the IP ML-EID or the ip having this prefix
def ip(self, prefix=None):
""" Returns the IPv6 RLOC """
ip = self._update_ips()
if prefix is None:
return self.ip_eid
# we need to check al IPs from self.ip_others that may start with prefix
p = prefix.split("::")[0]
for ip in self.ip_others:
if ip.startswith(p):
return ip
return None
def neighbors(self):
""" Returns a list with all properties of the neighbors """
return self.mesh.neighbors()
def neighbors_ip(self):
""" Returns a list with IPv6 (as strings) of the neighbors """
neighbors = self.neighbors()
nei_list = []
net_ip = self._rloc_ip_net_addr()
if neighbors is not None:
for nei_rec in neighbors:
nei_ip = net_ip + hex(nei_rec.rloc16)[2:]
nei_list.append(nei_ip)
return nei_list
def ipaddr(self):
""" Returns a list with all unicast IPv6 """
return self.mesh.ipaddr()
def cli(self, command):
""" Simple wrapper for OpenThread CLI """
return self.mesh.cli(command)
def ping(self, ip):
""" Returns ping return time, to an IP """
res = self.cli('ping ' + ip)
# '8 bytes from fdde:ad00:beef:0:0:ff:fe00:e000: icmp_seq=2 hlim=64 time=236ms\r\n'
# 'Error 6: Parse\r\n'
# no answer
ret_time = -1
try:
ret_time = int(res.split('time=')[1].split('ms')[0])
except Exception:
pass
return ret_time
def blink(self, num=3, period=.5, color=None):
""" LED blink """
if color is None:
color = self.RGBLED[self.state]
for i in range(0, num):
pycom.rgbled(0)
time.sleep(period)
pycom.rgbled(color)
time.sleep(period)
self.led_state()
