def read_lora_message():
global last_heartbeat
print("Calling receiveLoRaMessage to receive message...")
msg0 = lora_interface.receiveLoRaMessage(receive_timeout)
msg = msg0 # Copy the message safely.
status = lora_interface.getLoRaStatus()
print("Msg: " + msg + ", Status: " + str(status))
write_packet()
gateway_snr = lora_interface.getLoRaSNRValue()
gateway_rssi = lora_interface.getLoRaRSSIValue()
gateway_rssi_packet = lora_interface.getLoRaRSSIpacketValue()
# If no message available, try again.
if len(msg) == 0:
# Send a heartbeat message if it was last sent 10 mins ago.
if (datetime.datetime.now() -
last_heartbeat).total_seconds() < 10 * 60:
return None
last_heartbeat = datetime.datetime.now()
device_state = {
"message": "heartbeat",
"address": gateway_address,
"gateway": gateway_address,
"gateway_snr": gateway_snr,
"gateway_rssi": gateway_rssi,
"gateway_rssi_packet": gateway_rssi_packet
}
return device_state
device_address = lora_interface.getLoRaSender()
recipient_address = lora_interface.getLoRaRecipient()
packet_number = lora_interface.getLoRaPacketNumber()
device_state = {
"address": device_address,
"gateway": recipient_address,
"packet_number": packet_number,
"gateway_snr": gateway_snr,
"gateway_rssi": gateway_rssi,
"gateway_rssi_packet": gateway_rssi_packet
}
try:
# Msg contains an array of sensor data. Convert to dictionary.
msg_split = msg.split("|")
col = 0
for value in msg_split:
key = fields[col]
col = col + 1
value = value.strip()
if value == "":
continue # Allow "||" to denote skipping of fields.
# If field is integer or decimal, convert accordingly.
if key != "timestamp" and value.isdecimal():
if '.' in value: value = float(value)
else: value = int(value)
device_state[key] = value
except Exception as e:
# In case of parse errors e.g. due to Low Data Rate Optimization, record the error and continue.
device_state["error"] = str(e)
return device_state
def read_lora_message():
global last_heartbeat
print("Calling receiveLoRaMessage to receive message...")
msg0 = lora_interface.receiveLoRaMessage(receive_timeout)
msg = msg0 # Copy the message safely.
status = lora_interface.getLoRaStatus()
print("Msg: " + msg + ", Status: " + str(status))
write_packet()
gateway_snr = lora_interface.getLoRaSNRValue()
gateway_rssi = lora_interface.getLoRaRSSIValue()
gateway_rssi_packet = lora_interface.getLoRaRSSIpacketValue()
# If no message available, try again.
if len(msg) == 0:
# Send a heartbeat message if it was last sent 10 mins ago.
if (datetime.datetime.now() - last_heartbeat).total_seconds() < 10 * 60:
return None
last_heartbeat = datetime.datetime.now()
device_state = {
"message": "heartbeat",
"address": gateway_address,
"gateway": gateway_address,
"gateway_snr": gateway_snr,
"gateway_rssi": gateway_rssi,
"gateway_rssi_packet": gateway_rssi_packet
}
return device_state
device_address = lora_interface.getLoRaSender()
recipient_address = lora_interface.getLoRaRecipient()
packet_number = lora_interface.getLoRaPacketNumber()
device_state = {
"address": device_address,
"gateway": recipient_address,
"packet_number": packet_number,
"gateway_snr": gateway_snr,
"gateway_rssi": gateway_rssi,
"gateway_rssi_packet": gateway_rssi_packet
}
try:
# Msg contains an array of sensor data. Convert to dictionary.
msg_split = msg.split("|")
col = 0
for value in msg_split:
key = fields[col]
col = col + 1
value = value.strip()
if value == "": continue # Allow "||" to denote skipping of fields.
# If field is integer or decimal, convert accordingly.
if key != "timestamp" and value.isdecimal():
if '.' in value: value = float(value)
else: value = int(value)
device_state[key] = value
except Exception as e:
# In case of parse errors e.g. due to Low Data Rate Optimization, record the error and continue.
device_state["error"] = str(e)
return device_state
while True:
try:
# Wait a while to receive a message.
print("Calling receiveLoRaMessage to receive message...")
msg = lora_interface.receiveLoRaMessage(receive_timeout)
status = lora_interface.getLoRaStatus()
print("Msg: " + msg + ", Status: " + str(status))
# Read the LoRa counters.
status = lora_interface.getLoRaStatus()
setup_done = lora_interface.getLoRaSetupDone()
send_count = lora_interface.getLoRaSendCount()
receive_count = lora_interface.getLoRaReceiveCount()
snr = lora_interface.getLoRaSNRValue()
rssi = lora_interface.getLoRaRSSIValue()
rssi_packet = lora_interface.getLoRaRSSIpacketValue()
timestamp = datetime.datetime.now().isoformat()
msg = str(device_address) + "|" + \
str(gateway_address) + "|" + \
str(status) + "|" + \
str(setup_done) + "|" + \
str(send_count) + "|" + \
str(receive_count) + "|" + \
str(snr) + "|" + \
str(rssi) + "|" + \
str(rssi_packet) + "|" + \
str(timestamp)
print("Calling sendLoRaMessage to send device state to LoRa gateway " + str(gateway_address) + "...\n" + msg)
status = lora_interface.sendLoRaMessage(gateway_address, msg)
print("Status: " + str(status))