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Python library to Python 3

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This commit is contained in:
Mark Qvist 2020-05-27 16:45:51 +02:00
parent 02525cee55
commit 7a5d687f0e
2 changed files with 118 additions and 79 deletions
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18
Libraries/Example.py
View File

@ -1,19 +1,23 @@
# This is a short example program that # This is a short example program that
# demonstrates the bare minimum of using # demonstrates the bare minimum of using
# RNode in a Python program. First we'll # RNode in a Python program.
# import the RNodeInterface class. #
# The example and the RNode.py library is
# written for Python 3, so be sure to run
# it with: python3 Example.py
# First we'll import the RNodeInterface class.
from RNode import RNodeInterface from RNode import RNodeInterface
# We'll also define which serial port the # We'll also define which serial port the
# RNode is attached to. # RNode is attached to.
serialPort = "/dev/ttyUSB0" serialPort = "/dev/ttyUSB0"
# TODO: Remove
serialPort = "/dev/tty.usbserial-DN03E0FQ"
# This function gets called every time a # This function gets called every time a
# packet is received # packet is received
def gotPacket(data, rnode): def gotPacket(data, rnode):
print("Received a packet: "+data) message = data.decode("utf-8")
print("Received a packet: "+message)
print("RSSI: "+str(rnode.r_stat_rssi)+" dBm") print("RSSI: "+str(rnode.r_stat_rssi)+" dBm")
print("SNR: "+str(rnode.r_stat_snr)+" dB") print("SNR: "+str(rnode.r_stat_snr)+" dB")
@ -35,7 +39,9 @@ try:
print("Waiting for packets, hit enter to send a packet, Ctrl-C to exit") print("Waiting for packets, hit enter to send a packet, Ctrl-C to exit")
while True: while True:
input() input()
rnode.send("Hello World!") message = "Hello World!"
data = message.encode("utf-8")
rnode.send(data)
except KeyboardInterrupt as e: except KeyboardInterrupt as e:
print("") print("")
exit() exit()

179
Libraries/RNode.py
View File

@ -1,3 +1,28 @@
# RNode interface class for Python 3
#
# MIT License
#
# Copyright (c) 2020 Mark Qvist - unsigned.io
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
from time import sleep from time import sleep
import sys import sys
import serial import serial
@ -38,10 +63,10 @@ class KISS():
RADIO_STATE_ON = 0x01 RADIO_STATE_ON = 0x01
RADIO_STATE_ASK = 0xFF RADIO_STATE_ASK = 0xFF
CMD_ERROR = chr0x90 CMD_ERROR = 0x90
ERROR_INITRADIO = chr0x01 ERROR_INITRADIO = 0x01
ERROR_TXFAILED = chr0x02 ERROR_TXFAILED = 0x02
ERROR_EEPROM_LOCKED = chr0x03 ERROR_EEPROM_LOCKED = 0x03
@staticmethod @staticmethod
def escape(data): def escape(data):
@ -51,7 +76,7 @@ class KISS():
class RNodeInterface(): class RNodeInterface():
MTU = 500 MTU = 500
MAX_CHUNK = 32768 MAX_CHUNK = 32768
FREQ_MIN = 137000000 FREQ_MIN = 137000000
FREQ_MAX = 1020000000 FREQ_MAX = 1020000000
@ -65,10 +90,14 @@ class RNodeInterface():
LOG_DEBUG = 6 LOG_DEBUG = 6
LOG_EXTREME = 7 LOG_EXTREME = 7
RSSI_OFFSET = 157 FREQ_MIN = 137000000
SNR_OFFSET = 128 FREQ_MAX = 1020000000
def __init__(self, callback, name, port, frequency = None, bandwidth = None, txpower = None, sf = None, cr = None, loglevel = -1, flow_control = True): RSSI_OFFSET = 157
CALLSIGN_MAX_LEN = 32
def __init__(self, callback, name, port, frequency = None, bandwidth = None, txpower = None, sf = None, cr = None, loglevel = LOG_NOTICE, flow_control = False, id_interval = None, id_callsign = None):
self.serial = None self.serial = None
self.loglevel = loglevel self.loglevel = loglevel
self.callback = callback self.callback = callback
@ -89,6 +118,8 @@ class RNodeInterface():
self.state = KISS.RADIO_STATE_OFF self.state = KISS.RADIO_STATE_OFF
self.bitrate = 0 self.bitrate = 0
self.last_id = 0
self.r_frequency = None self.r_frequency = None
self.r_bandwidth = None self.r_bandwidth = None
self.r_txpower = None self.r_txpower = None
@ -123,6 +154,22 @@ class RNodeInterface():
self.log("Invalid spreading factor configured for "+str(self), RNodeInterface.LOG_ERROR) self.log("Invalid spreading factor configured for "+str(self), RNodeInterface.LOG_ERROR)
self.validcfg = False self.validcfg = False
if (self.cr < 5 or self.cr > 8):
self.log("Invalid coding rate configured for "+str(self), RNodeInterface.LOG_ERROR)
self.validcfg = False
if id_interval != None and id_callsign != None:
if (len(id_callsign.encode("utf-8")) <= RNodeInterface.CALLSIGN_MAX_LEN):
self.should_id = True
self.id_callsign = id_callsign
self.id_interval = id_interval
else:
self.log("The encoded ID callsign for "+str(self)+" exceeds the max length of "+str(RNodeInterface.CALLSIGN_MAX_LEN)+" bytes.", RNodeInterface.LOG_ERROR)
self.validcfg = False
else:
self.id_interval = None
self.id_callsign = None
if (not self.validcfg): if (not self.validcfg):
raise ValueError("The configuration for "+str(self)+" contains errors, interface is offline") raise ValueError("The configuration for "+str(self)+" contains errors, interface is offline")
@ -159,7 +206,7 @@ class RNodeInterface():
self.log(str(self)+" is configured and powered up") self.log(str(self)+" is configured and powered up")
sleep(1.0) sleep(1.0)
else: else:
self.log("After configuring "+str(self)+", the actual radio parameters did not match your configuration.", RNodeInterface.LOG_ERROR) self.log("After configuring "+str(self)+", the reported radio parameters did not match your configuration.", RNodeInterface.LOG_ERROR)
self.log("Make sure that your hardware actually supports the parameters specified in the configuration", RNodeInterface.LOG_ERROR) self.log("Make sure that your hardware actually supports the parameters specified in the configuration", RNodeInterface.LOG_ERROR)
self.log("Aborting RNode startup", RNodeInterface.LOG_ERROR) self.log("Aborting RNode startup", RNodeInterface.LOG_ERROR)
self.serial.close() self.serial.close()
@ -175,6 +222,7 @@ class RNodeInterface():
self.setBandwidth() self.setBandwidth()
self.setTXPower() self.setTXPower()
self.setSpreadingFactor() self.setSpreadingFactor()
self.setCodingRate()
self.setRadioState(KISS.RADIO_STATE_ON) self.setRadioState(KISS.RADIO_STATE_ON)
def setFrequency(self): def setFrequency(self):
@ -182,9 +230,9 @@ class RNodeInterface():
c2 = self.frequency >> 16 & 0xFF c2 = self.frequency >> 16 & 0xFF
c3 = self.frequency >> 8 & 0xFF c3 = self.frequency >> 8 & 0xFF
c4 = self.frequency & 0xFF c4 = self.frequency & 0xFF
data = KISS.escape(chr(c1)+chr(c2)+chr(c3)+chr(c4)) data = KISS.escape(bytes([c1])+bytes([c2])+bytes([c3])+bytes([c4]))
kiss_command = KISS.FEND+KISS.CMD_FREQUENCY+data+KISS.FEND kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_FREQUENCY])+data+bytes([KISS.FEND])
written = self.serial.write(kiss_command) written = self.serial.write(kiss_command)
if written != len(kiss_command): if written != len(kiss_command):
raise IOError("An IO error occurred while configuring frequency for "+self(str)) raise IOError("An IO error occurred while configuring frequency for "+self(str))
@ -194,36 +242,36 @@ class RNodeInterface():
c2 = self.bandwidth >> 16 & 0xFF c2 = self.bandwidth >> 16 & 0xFF
c3 = self.bandwidth >> 8 & 0xFF c3 = self.bandwidth >> 8 & 0xFF
c4 = self.bandwidth & 0xFF c4 = self.bandwidth & 0xFF
data = KISS.escape(chr(c1)+chr(c2)+chr(c3)+chr(c4)) data = KISS.escape(bytes([c1])+bytes([c2])+bytes([c3])+bytes([c4]))
kiss_command = KISS.FEND+KISS.CMD_BANDWIDTH+data+KISS.FEND kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_BANDWIDTH])+data+bytes([KISS.FEND])
written = self.serial.write(kiss_command) written = self.serial.write(kiss_command)
if written != len(kiss_command): if written != len(kiss_command):
raise IOError("An IO error occurred while configuring bandwidth for "+self(str)) raise IOError("An IO error occurred while configuring bandwidth for "+self(str))
def setTXPower(self): def setTXPower(self):
txp = chr(self.txpower) txp = bytes([self.txpower])
kiss_command = KISS.FEND+KISS.CMD_TXPOWER+txp+KISS.FEND kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_TXPOWER])+txp+bytes([KISS.FEND])
written = self.serial.write(kiss_command) written = self.serial.write(kiss_command)
if written != len(kiss_command): if written != len(kiss_command):
raise IOError("An IO error occurred while configuring TX power for "+self(str)) raise IOError("An IO error occurred while configuring TX power for "+self(str))
def setSpreadingFactor(self): def setSpreadingFactor(self):
sf = chr(self.sf) sf = bytes([self.sf])
kiss_command = KISS.FEND+KISS.CMD_SF+sf+KISS.FEND kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_SF])+sf+bytes([KISS.FEND])
written = self.serial.write(kiss_command) written = self.serial.write(kiss_command)
if written != len(kiss_command): if written != len(kiss_command):
raise IOError("An IO error occurred while configuring spreading factor for "+self(str)) raise IOError("An IO error occurred while configuring spreading factor for "+self(str))
def setCodingRate(self): def setCodingRate(self):
cr = chr(self.cr) cr = bytes([self.cr])
kiss_command = KISS.FEND+KISS.CMD_CR+cr+KISS.FEND kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_CR])+cr+bytes([KISS.FEND])
written = self.serial.write(kiss_command) written = self.serial.write(kiss_command)
if written != len(kiss_command): if written != len(kiss_command):
raise IOError("An IO error occurred while configuring coding rate for "+self(str)) raise IOError("An IO error occurred while configuring coding rate for "+self(str))
def setRadioState(self, state): def setRadioState(self, state):
kiss_command = KISS.FEND+KISS.CMD_RADIO_STATE+state+KISS.FEND kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_RADIO_STATE])+bytes([state])+bytes([KISS.FEND])
written = self.serial.write(kiss_command) written = self.serial.write(kiss_command)
if written != len(kiss_command): if written != len(kiss_command):
raise IOError("An IO error occurred while configuring radio state for "+self(str)) raise IOError("An IO error occurred while configuring radio state for "+self(str))
@ -251,9 +299,9 @@ class RNodeInterface():
def setPromiscuousMode(self, state): def setPromiscuousMode(self, state):
if state == True: if state == True:
kiss_command = KISS.FEND+KISS.CMD_PROMISC+chr(0x01)+KISS.FEND kiss_command = bytes([KISS.FEND,KISS.CMD_PROMISC, 0x01, KISS.FEND])
else: else:
kiss_command = KISS.FEND+KISS.CMD_PROMISC+chr(0x00)+KISS.FEND kiss_command = bytes([KISS.FEND,KISS.CMD_PROMISC, 0x00, KISS.FEND])
written = self.serial.write(kiss_command) written = self.serial.write(kiss_command)
if written != len(kiss_command): if written != len(kiss_command):
@ -280,9 +328,17 @@ class RNodeInterface():
if self.flow_control: if self.flow_control:
self.interface_ready = False self.interface_ready = False
data = KISS.escape(data) frame = b""
frame = chr(0xc0)+chr(0x00)+data+chr(0xc0)
if self.id_interval != None and self.id_callsign != None:
if self.last_id + self.id_interval < time.time():
self.last_id = time.time()
frame = bytes([0xc0])+bytes([0x00])+KISS.escape(self.id_callsign.encode("utf-8"))+bytes([0xc0])
data = KISS.escape(data)
frame += bytes([0xc0])+bytes([0x00])+data+bytes([0xc0])
written = self.serial.write(frame) written = self.serial.write(frame)
if written != len(frame): if written != len(frame):
raise IOError("Serial interface only wrote "+str(written)+" bytes of "+str(len(data))) raise IOError("Serial interface only wrote "+str(written)+" bytes of "+str(len(data)))
else: else:
@ -304,26 +360,25 @@ class RNodeInterface():
in_frame = False in_frame = False
escape = False escape = False
command = KISS.CMD_UNKNOWN command = KISS.CMD_UNKNOWN
data_buffer = "" data_buffer = b""
command_buffer = "" command_buffer = b""
last_read_ms = int(time.time()*1000) last_read_ms = int(time.time()*1000)
while self.serial.is_open: while self.serial.is_open:
if self.serial.in_waiting: if self.serial.in_waiting:
byte = self.serial.read(1) byte = ord(self.serial.read(1))
last_read_ms = int(time.time()*1000) last_read_ms = int(time.time()*1000)
if (in_frame and byte == KISS.FEND and command == KISS.CMD_DATA): if (in_frame and byte == KISS.FEND and command == KISS.CMD_DATA):
in_frame = False in_frame = False
self.processIncoming(data_buffer) self.processIncoming(data_buffer)
data_buffer = "" data_buffer = b""
command_buffer = "" command_buffer = b""
elif (byte == KISS.FEND): elif (byte == KISS.FEND):
in_frame = True in_frame = True
command = KISS.CMD_UNKNOWN command = KISS.CMD_UNKNOWN
data_buffer = "" data_buffer = b""
command_buffer = "" command_buffer = b""
elif (in_frame and len(data_buffer) < RNodeInterface.MTU): elif (in_frame and len(data_buffer) < RNodeInterface.MTU):
if (len(data_buffer) == 0 and command == KISS.CMD_UNKNOWN): if (len(data_buffer) == 0 and command == KISS.CMD_UNKNOWN):
command = byte command = byte
@ -337,7 +392,7 @@ class RNodeInterface():
if (byte == KISS.TFESC): if (byte == KISS.TFESC):
byte = KISS.FESC byte = KISS.FESC
escape = False escape = False
data_buffer = data_buffer+byte data_buffer = data_buffer+bytes([byte])
elif (command == KISS.CMD_FREQUENCY): elif (command == KISS.CMD_FREQUENCY):
if (byte == KISS.FESC): if (byte == KISS.FESC):
escape = True escape = True
@ -348,9 +403,9 @@ class RNodeInterface():
if (byte == KISS.TFESC): if (byte == KISS.TFESC):
byte = KISS.FESC byte = KISS.FESC
escape = False escape = False
command_buffer = command_buffer+byte command_buffer = command_buffer+bytes([byte])
if (len(command_buffer) == 4): if (len(command_buffer) == 4):
self.r_frequency = ord(command_buffer[0]) << 24 | ord(command_buffer[1]) << 16 | ord(command_buffer[2]) << 8 | ord(command_buffer[3]) self.r_frequency = command_buffer[0] << 24 | command_buffer[1] << 16 | command_buffer[2] << 8 | command_buffer[3]
self.log(str(self)+" Radio reporting frequency is "+str(self.r_frequency/1000000.0)+" MHz", RNodeInterface.LOG_DEBUG) self.log(str(self)+" Radio reporting frequency is "+str(self.r_frequency/1000000.0)+" MHz", RNodeInterface.LOG_DEBUG)
self.updateBitrate() self.updateBitrate()
@ -364,27 +419,27 @@ class RNodeInterface():
if (byte == KISS.TFESC): if (byte == KISS.TFESC):
byte = KISS.FESC byte = KISS.FESC
escape = False escape = False
command_buffer = command_buffer+byte command_buffer = command_buffer+bytes([byte])
if (len(command_buffer) == 4): if (len(command_buffer) == 4):
self.r_bandwidth = ord(command_buffer[0]) << 24 | ord(command_buffer[1]) << 16 | ord(command_buffer[2]) << 8 | ord(command_buffer[3]) self.r_bandwidth = command_buffer[0] << 24 | command_buffer[1] << 16 | command_buffer[2] << 8 | command_buffer[3]
self.log(str(self)+" Radio reporting bandwidth is "+str(self.r_bandwidth/1000.0)+" KHz", RNodeInterface.LOG_DEBUG) self.log(str(self)+" Radio reporting bandwidth is "+str(self.r_bandwidth/1000.0)+" KHz", RNodeInterface.LOG_DEBUG)
self.updateBitrate() self.updateBitrate()
elif (command == KISS.CMD_TXPOWER): elif (command == KISS.CMD_TXPOWER):
self.r_txpower = ord(byte) self.r_txpower = byte
self.log(str(self)+" Radio reporting TX power is "+str(self.r_txpower)+" dBm", RNodeInterface.LOG_DEBUG) self.log(str(self)+" Radio reporting TX power is "+str(self.r_txpower)+" dBm", RNodeInterface.LOG_DEBUG)
elif (command == KISS.CMD_SF): elif (command == KISS.CMD_SF):
self.r_sf = ord(byte) self.r_sf = byte
self.log(str(self)+" Radio reporting spreading factor is "+str(self.r_sf), RNodeInterface.LOG_DEBUG) self.log(str(self)+" Radio reporting spreading factor is "+str(self.r_sf), RNodeInterface.LOG_DEBUG)
self.updateBitrate() self.updateBitrate()
elif (command == KISS.CMD_CR): elif (command == KISS.CMD_CR):
self.r_cr = ord(byte) self.r_cr = byte
self.log(str(self)+" Radio reporting coding rate is "+str(self.r_cr), RNodeInterface.LOG_DEBUG) self.log(str(self)+" Radio reporting coding rate is "+str(self.r_cr), RNodeInterface.LOG_DEBUG)
self.updateBitrate() self.updateBitrate()
elif (command == KISS.CMD_RADIO_STATE): elif (command == KISS.CMD_RADIO_STATE):
self.r_state = ord(byte) self.r_state = byte
elif (command == KISS.CMD_RADIO_LOCK): elif (command == KISS.CMD_RADIO_LOCK):
self.r_lock = ord(byte) self.r_lock = byte
elif (command == KISS.CMD_STAT_RX): elif (command == KISS.CMD_STAT_RX):
if (byte == KISS.FESC): if (byte == KISS.FESC):
escape = True escape = True
@ -395,7 +450,7 @@ class RNodeInterface():
if (byte == KISS.TFESC): if (byte == KISS.TFESC):
byte = KISS.FESC byte = KISS.FESC
escape = False escape = False
command_buffer = command_buffer+byte command_buffer = command_buffer+bytes([byte])
if (len(command_buffer) == 4): if (len(command_buffer) == 4):
self.r_stat_rx = ord(command_buffer[0]) << 24 | ord(command_buffer[1]) << 16 | ord(command_buffer[2]) << 8 | ord(command_buffer[3]) self.r_stat_rx = ord(command_buffer[0]) << 24 | ord(command_buffer[1]) << 16 | ord(command_buffer[2]) << 8 | ord(command_buffer[3])
@ -409,53 +464,31 @@ class RNodeInterface():
if (byte == KISS.TFESC): if (byte == KISS.TFESC):
byte = KISS.FESC byte = KISS.FESC
escape = False escape = False
command_buffer = command_buffer+byte command_buffer = command_buffer+bytes([byte])
if (len(command_buffer) == 4): if (len(command_buffer) == 4):
self.r_stat_tx = ord(command_buffer[0]) << 24 | ord(command_buffer[1]) << 16 | ord(command_buffer[2]) << 8 | ord(command_buffer[3]) self.r_stat_tx = ord(command_buffer[0]) << 24 | ord(command_buffer[1]) << 16 | ord(command_buffer[2]) << 8 | ord(command_buffer[3])
elif (command == KISS.CMD_STAT_RSSI): elif (command == KISS.CMD_STAT_RSSI):
if (byte == KISS.FESC): self.r_stat_rssi = byte-RNodeInterface.RSSI_OFFSET
escape = True
else:
if (escape):
if (byte == KISS.TFEND):
byte = KISS.FEND
if (byte == KISS.TFESC):
byte = KISS.FESC
escape = False
self.r_stat_rssi = ord(byte)-self.RSSI_OFFSET
elif (command == KISS.CMD_STAT_SNR): elif (command == KISS.CMD_STAT_SNR):
if (byte == KISS.FESC): self.r_stat_snr = int.from_bytes(bytes([byte]), byteorder="big", signed=True) * 0.25
escape = True
else:
if (escape):
if (byte == KISS.TFEND):
byte = KISS.FEND
if (byte == KISS.TFESC):
byte = KISS.FESC
escape = False
self.r_stat_snr = ord(byte)-self.SNR_OFFSET
elif (command == KISS.CMD_RANDOM): elif (command == KISS.CMD_RANDOM):
self.r_random = ord(byte) self.r_random = byte
elif (command == KISS.CMD_ERROR): elif (command == KISS.CMD_ERROR):
if (byte == KISS.ERROR_INITRADIO): if (byte == KISS.ERROR_INITRADIO):
self.log(str(self)+" hardware initialisation error (code "+self.hexrep(byte)+")", RNodeInterface.LOG_ERROR) self.log(str(self)+" hardware initialisation error (code "+RNS.hexrep(byte)+")", RNodeInterface.LOG_ERROR)
elif (byte == KISS.ERROR_INITRADIO): elif (byte == KISS.ERROR_INITRADIO):
self.log(str(self)+" hardware TX error (code "+self.hexrep(byte)+")", RNodeInterface.LOG_ERROR) self.log(str(self)+" hardware TX error (code "+RNS.hexrep(byte)+")", RNodeInterface.LOG_ERROR)
else: else:
self.log(str(self)+" hardware error (code "+self.hexrep(byte)+")", RNodeInterface.LOG_ERROR) self.log(str(self)+" hardware error (code "+RNS.hexrep(byte)+")", RNodeInterface.LOG_ERROR)
elif (command == KISS.CMD_READY): elif (command == KISS.CMD_READY):
# TODO: add timeout and reset if ready
# command never arrives
self.process_queue() self.process_queue()
else: else:
time_since_last = int(time.time()*1000) - last_read_ms time_since_last = int(time.time()*1000) - last_read_ms
if len(data_buffer) > 0 and time_since_last > self.timeout: if len(data_buffer) > 0 and time_since_last > self.timeout:
self.log(str(self)+" serial read timeout", RNodeInterface.LOG_DEBUG) self.log(str(self)+" serial read timeout", RNodeInterface.LOG_DEBUG)
data_buffer = "" data_buffer = b""
in_frame = False in_frame = False
command = KISS.CMD_UNKNOWN command = KISS.CMD_UNKNOWN
escape = False escape = False