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added class variables for radio parameters (frequency, spreading factor, ...) and nice output for recv() function

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This commit is contained in:
Simon Pirkelmann 2019-11-21 16:38:49 +01:00
parent 23a63cac12
commit 88c6d94a78
1 changed files with 18 additions and 5 deletions
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23
micropython/lora_transceiver.py
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@ -20,30 +20,35 @@ class LoRaTransceiver:
""" set spreading factor
possible values are 7-12
"""
self.spreadingfactor = spreadingfactor
self.lora.setSpreadingFactor(spreadingfactor)
def setFrequency(self, frequency):
""" set frequency (= channel used)
for now only 868 Mhz and 868.1 MHz are supported
"""
self.frequency = frequency
self.lora.setFrequency(frequency)
def setSignalBandwidth(self, bandwidth):
""" set the bandwidth
possible values should be 125 kHz or 250 kHz according to EU 868 frequency plan
"""
self.bandwidth = bandwidth
self.lora.setSignalBandwidth(bandwidth)
def setSyncWord(self, syncword):
""" set the sync word
should be 0x12 for plain LoRa and 0x34 for LoRaWAN
"""
self.syncword = syncword
self.lora.setSyncWord(syncword)
def send(self, data):
""" send raw data
"""
print("Sending {}".format(data))
data_hex = " ".join(list(map(lambda x: "{0:02x}".format(x), data))).upper()
print("Sending data {}".format(data_hex))
self.lora.println_raw(data)
if self.display is not None:
@ -53,7 +58,7 @@ class LoRaTransceiver:
""" send a message
message should be a string
"""
print("Sending {}".format(message))
print("Sending string {}".format(message))
self.lora.println(message)
if self.display is not None:
@ -61,18 +66,26 @@ class LoRaTransceiver:
def recv(self):
""" start listening for messages and output them on the console """
print("Receiving at frequency {} with spreading factor {} ...".format(self.frequency, self.spreadingfactor))
if self.display is not None:
self.display.show_text_wrap("Receiving ...")
self.display.show_text_wrap("Receiving at frequency {} with spreading factor {} ...".format(self.frequency, self.spreadingfactor))
while True:
# check for new message
if self.lora.receivedPacket():
self.lora.blink_led()
print(" got packet: ")
try:
payload = self.lora.read_payload()
payload_bytes = bytes(self.lora.read_payload_raw())
payload_hex = " ".join(list(map(lambda x: "{0:02x}".format(x), payload_bytes))).upper()
payload_string = self.lora.read_payload_raw()
print(" length : {0}".format(len(payload_bytes)))
print(" hex : {0}".format(payload_hex))
print(" bytes : {0}".format(payload_bytes))
print(" RSSI : {0}\n".format(self.lora.packetRssi()))
if self.display is not None:
self.display.show_text_wrap("Received: {0} RSSI: {1}".format(payload.decode(), lora.packetRssi()))
self.display.show_text_wrap("Received: {0} RSSI: {1}".format(payload_bytes, self.lora.packetRssi()))
except Exception as e:
print(e)