537 lines
22 KiB
Python
537 lines
22 KiB
Python
# RNode interface class for Python 3
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#
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# MIT License
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#
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# Copyright (c) 2020 Mark Qvist - unsigned.io
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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from time import sleep
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import sys
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import serial
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import threading
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import time
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import math
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class KISS():
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FEND = 0xC0
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FESC = 0xDB
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TFEND = 0xDC
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TFESC = 0xDD
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CMD_UNKNOWN = 0xFE
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CMD_DATA = 0x00
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CMD_FREQUENCY = 0x01
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CMD_BANDWIDTH = 0x02
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CMD_TXPOWER = 0x03
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CMD_SF = 0x04
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CMD_CR = 0x05
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CMD_RADIO_STATE = 0x06
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CMD_RADIO_LOCK = 0x07
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CMD_DETECT = 0x08
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CMD_PROMISC = 0x0E
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CMD_READY = 0x0F
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CMD_STAT_RX = 0x21
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CMD_STAT_TX = 0x22
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CMD_STAT_RSSI = 0x23
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CMD_STAT_SNR = 0x24
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CMD_BLINK = 0x30
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CMD_RANDOM = 0x40
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CMD_FW_VERSION = 0x50
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CMD_ROM_READ = 0x51
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DETECT_REQ = 0x73
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DETECT_RESP = 0x46
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RADIO_STATE_OFF = 0x00
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RADIO_STATE_ON = 0x01
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RADIO_STATE_ASK = 0xFF
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CMD_ERROR = 0x90
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ERROR_INITRADIO = 0x01
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ERROR_TXFAILED = 0x02
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ERROR_EEPROM_LOCKED = 0x03
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@staticmethod
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def escape(data):
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data = data.replace(bytes([0xdb]), bytes([0xdb, 0xdd]))
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data = data.replace(bytes([0xc0]), bytes([0xdb, 0xdc]))
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return data
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class RNodeInterface():
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MTU = 500
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MAX_CHUNK = 32768
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FREQ_MIN = 137000000
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FREQ_MAX = 1020000000
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LOG_CRITICAL = 0
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LOG_ERROR = 1
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LOG_WARNING = 2
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LOG_NOTICE = 3
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LOG_INFO = 4
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LOG_VERBOSE = 5
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LOG_DEBUG = 6
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LOG_EXTREME = 7
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FREQ_MIN = 137000000
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FREQ_MAX = 1020000000
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RSSI_OFFSET = 157
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CALLSIGN_MAX_LEN = 32
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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):
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self.serial = None
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self.loglevel = loglevel
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self.callback = callback
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self.name = name
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self.port = port
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self.speed = 115200
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self.databits = 8
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self.parity = serial.PARITY_NONE
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self.stopbits = 1
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self.timeout = 100
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self.online = False
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self.frequency = frequency
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self.bandwidth = bandwidth
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self.txpower = txpower
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self.sf = sf
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self.cr = cr
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self.state = KISS.RADIO_STATE_OFF
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self.bitrate = 0
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self.last_id = 0
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self.r_frequency = None
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self.r_bandwidth = None
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self.r_txpower = None
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self.r_sf = None
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self.r_cr = None
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self.r_state = None
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self.r_lock = None
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self.r_stat_rx = None
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self.r_stat_tx = None
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self.r_stat_rssi = None
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self.r_stat_snr = None
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self.r_random = None
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self.packet_queue = []
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self.flow_control = flow_control
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self.interface_ready = False
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self.validcfg = True
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if (self.frequency < RNodeInterface.FREQ_MIN or self.frequency > RNodeInterface.FREQ_MAX):
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self.log("Invalid frequency configured for "+str(self), RNodeInterface.LOG_ERROR)
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self.validcfg = False
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if (self.txpower < 0 or self.txpower > 17):
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self.log("Invalid TX power configured for "+str(self), RNodeInterface.LOG_ERROR)
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self.validcfg = False
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if (self.bandwidth < 7800 or self.bandwidth > 500000):
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self.log("Invalid bandwidth configured for "+str(self), RNodeInterface.LOG_ERROR)
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self.validcfg = False
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if (self.sf < 7 or self.sf > 12):
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self.log("Invalid spreading factor configured for "+str(self), RNodeInterface.LOG_ERROR)
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self.validcfg = False
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if (self.cr < 5 or self.cr > 8):
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self.log("Invalid coding rate configured for "+str(self), RNodeInterface.LOG_ERROR)
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self.validcfg = False
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if id_interval != None and id_callsign != None:
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if (len(id_callsign.encode("utf-8")) <= RNodeInterface.CALLSIGN_MAX_LEN):
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self.should_id = True
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self.id_callsign = id_callsign
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self.id_interval = id_interval
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else:
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self.log("The encoded ID callsign for "+str(self)+" exceeds the max length of "+str(RNodeInterface.CALLSIGN_MAX_LEN)+" bytes.", RNodeInterface.LOG_ERROR)
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self.validcfg = False
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else:
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self.id_interval = None
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self.id_callsign = None
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if (not self.validcfg):
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raise ValueError("The configuration for "+str(self)+" contains errors, interface is offline")
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try:
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self.log("Opening serial port "+self.port+"...")
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self.serial = serial.Serial(
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port = self.port,
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baudrate = self.speed,
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bytesize = self.databits,
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parity = self.parity,
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stopbits = self.stopbits,
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xonxoff = False,
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rtscts = False,
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timeout = 0,
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inter_byte_timeout = None,
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write_timeout = None,
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dsrdtr = False,
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)
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except Exception as e:
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self.log("Could not open serial port for interface "+str(self), RNodeInterface.LOG_ERROR)
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raise e
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if self.serial.is_open:
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sleep(2.0)
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thread = threading.Thread(target=self.readLoop)
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thread.setDaemon(True)
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thread.start()
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self.online = True
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self.log("Serial port "+self.port+" is now open")
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self.log("Configuring RNode interface...", RNodeInterface.LOG_VERBOSE)
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self.initRadio()
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if (self.validateRadioState()):
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self.interface_ready = True
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self.log(str(self)+" is configured and powered up")
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sleep(1.0)
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else:
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self.log("After configuring "+str(self)+", the reported radio parameters did not match your configuration.", RNodeInterface.LOG_ERROR)
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self.log("Make sure that your hardware actually supports the parameters specified in the configuration", RNodeInterface.LOG_ERROR)
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self.log("Aborting RNode startup", RNodeInterface.LOG_ERROR)
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self.serial.close()
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raise IOError("RNode interface did not pass validation")
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else:
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raise IOError("Could not open serial port")
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def log(self, message, level):
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pass
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def initRadio(self):
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self.setFrequency()
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self.setBandwidth()
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self.setTXPower()
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self.setSpreadingFactor()
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self.setCodingRate()
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self.setRadioState(KISS.RADIO_STATE_ON)
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def setFrequency(self):
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c1 = self.frequency >> 24
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c2 = self.frequency >> 16 & 0xFF
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c3 = self.frequency >> 8 & 0xFF
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c4 = self.frequency & 0xFF
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data = KISS.escape(bytes([c1])+bytes([c2])+bytes([c3])+bytes([c4]))
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kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_FREQUENCY])+data+bytes([KISS.FEND])
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written = self.serial.write(kiss_command)
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if written != len(kiss_command):
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raise IOError("An IO error occurred while configuring frequency for "+self(str))
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def setBandwidth(self):
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c1 = self.bandwidth >> 24
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c2 = self.bandwidth >> 16 & 0xFF
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c3 = self.bandwidth >> 8 & 0xFF
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c4 = self.bandwidth & 0xFF
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data = KISS.escape(bytes([c1])+bytes([c2])+bytes([c3])+bytes([c4]))
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kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_BANDWIDTH])+data+bytes([KISS.FEND])
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written = self.serial.write(kiss_command)
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if written != len(kiss_command):
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raise IOError("An IO error occurred while configuring bandwidth for "+self(str))
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def setTXPower(self):
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txp = bytes([self.txpower])
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kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_TXPOWER])+txp+bytes([KISS.FEND])
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written = self.serial.write(kiss_command)
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if written != len(kiss_command):
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raise IOError("An IO error occurred while configuring TX power for "+self(str))
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def setSpreadingFactor(self):
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sf = bytes([self.sf])
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kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_SF])+sf+bytes([KISS.FEND])
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written = self.serial.write(kiss_command)
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if written != len(kiss_command):
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raise IOError("An IO error occurred while configuring spreading factor for "+self(str))
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def setCodingRate(self):
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cr = bytes([self.cr])
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kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_CR])+cr+bytes([KISS.FEND])
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written = self.serial.write(kiss_command)
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if written != len(kiss_command):
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raise IOError("An IO error occurred while configuring coding rate for "+self(str))
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def setRadioState(self, state):
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kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_RADIO_STATE])+bytes([state])+bytes([KISS.FEND])
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written = self.serial.write(kiss_command)
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if written != len(kiss_command):
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raise IOError("An IO error occurred while configuring radio state for "+self(str))
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def validateRadioState(self):
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self.log("Validating radio configuration for "+str(self)+"...", RNodeInterface.LOG_VERBOSE)
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sleep(0.25);
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if (self.frequency != self.r_frequency):
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self.log("Frequency mismatch", RNodeInterface.LOG_ERROR)
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self.validcfg = False
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if (self.bandwidth != self.r_bandwidth):
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self.log("Bandwidth mismatch", RNodeInterface.LOG_ERROR)
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self.validcfg = False
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if (self.txpower != self.r_txpower):
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self.log("TX power mismatch", RNodeInterface.LOG_ERROR)
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self.validcfg = False
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if (self.sf != self.r_sf):
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self.log("Spreading factor mismatch", RNodeInterface.LOG_ERROR)
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self.validcfg = False
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if (self.validcfg):
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return True
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else:
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return False
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def setPromiscuousMode(self, state):
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if state == True:
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kiss_command = bytes([KISS.FEND,KISS.CMD_PROMISC, 0x01, KISS.FEND])
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else:
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kiss_command = bytes([KISS.FEND,KISS.CMD_PROMISC, 0x00, KISS.FEND])
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written = self.serial.write(kiss_command)
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if written != len(kiss_command):
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raise IOError("An IO error occurred while configuring promiscuous mode for "+self(str))
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def updateBitrate(self):
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try:
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self.bitrate = self.r_sf * ( (4.0/self.r_cr) / (math.pow(2,self.r_sf)/(self.r_bandwidth/1000)) ) * 1000
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self.bitrate_kbps = round(self.bitrate/1000.0, 2)
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self.log(str(self)+" On-air bitrate is now "+str(self.bitrate_kbps)+ " kbps", RNodeInterface.LOG_DEBUG)
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except:
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self.bitrate = 0
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def processIncoming(self, data):
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self.callback(data, self)
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def send(self, data):
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self.processOutgoing(data)
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def processOutgoing(self,data):
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if self.online:
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if self.interface_ready:
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if self.flow_control:
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self.interface_ready = False
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frame = b""
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if self.id_interval != None and self.id_callsign != None:
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if self.last_id + self.id_interval < time.time():
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self.last_id = time.time()
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frame = bytes([0xc0])+bytes([0x00])+KISS.escape(self.id_callsign.encode("utf-8"))+bytes([0xc0])
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data = KISS.escape(data)
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frame += bytes([0xc0])+bytes([0x00])+data+bytes([0xc0])
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written = self.serial.write(frame)
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if written != len(frame):
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raise IOError("Serial interface only wrote "+str(written)+" bytes of "+str(len(data)))
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else:
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self.queue(data)
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def queue(self, data):
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self.packet_queue.append(data)
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def process_queue(self):
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if len(self.packet_queue) > 0:
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data = self.packet_queue.pop(0)
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self.interface_ready = True
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self.processOutgoing(data)
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elif len(self.packet_queue) == 0:
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self.interface_ready = True
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def readLoop(self):
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try:
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in_frame = False
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escape = False
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command = KISS.CMD_UNKNOWN
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data_buffer = b""
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command_buffer = b""
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last_read_ms = int(time.time()*1000)
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while self.serial.is_open:
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if self.serial.in_waiting:
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byte = ord(self.serial.read(1))
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last_read_ms = int(time.time()*1000)
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if (in_frame and byte == KISS.FEND and command == KISS.CMD_DATA):
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in_frame = False
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self.processIncoming(data_buffer)
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data_buffer = b""
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command_buffer = b""
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elif (byte == KISS.FEND):
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in_frame = True
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command = KISS.CMD_UNKNOWN
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data_buffer = b""
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command_buffer = b""
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elif (in_frame and len(data_buffer) < RNodeInterface.MTU):
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if (len(data_buffer) == 0 and command == KISS.CMD_UNKNOWN):
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command = byte
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elif (command == KISS.CMD_DATA):
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if (byte == KISS.FESC):
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escape = True
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else:
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if (escape):
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if (byte == KISS.TFEND):
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byte = KISS.FEND
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if (byte == KISS.TFESC):
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byte = KISS.FESC
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escape = False
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data_buffer = data_buffer+bytes([byte])
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elif (command == KISS.CMD_FREQUENCY):
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if (byte == KISS.FESC):
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escape = True
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else:
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if (escape):
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if (byte == KISS.TFEND):
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byte = KISS.FEND
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if (byte == KISS.TFESC):
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byte = KISS.FESC
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escape = False
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command_buffer = command_buffer+bytes([byte])
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if (len(command_buffer) == 4):
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self.r_frequency = command_buffer[0] << 24 | command_buffer[1] << 16 | command_buffer[2] << 8 | command_buffer[3]
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self.log(str(self)+" Radio reporting frequency is "+str(self.r_frequency/1000000.0)+" MHz", RNodeInterface.LOG_DEBUG)
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self.updateBitrate()
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elif (command == KISS.CMD_BANDWIDTH):
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if (byte == KISS.FESC):
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escape = True
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else:
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if (escape):
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if (byte == KISS.TFEND):
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byte = KISS.FEND
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if (byte == KISS.TFESC):
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byte = KISS.FESC
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escape = False
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command_buffer = command_buffer+bytes([byte])
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if (len(command_buffer) == 4):
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self.r_bandwidth = command_buffer[0] << 24 | command_buffer[1] << 16 | command_buffer[2] << 8 | command_buffer[3]
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self.log(str(self)+" Radio reporting bandwidth is "+str(self.r_bandwidth/1000.0)+" KHz", RNodeInterface.LOG_DEBUG)
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self.updateBitrate()
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elif (command == KISS.CMD_TXPOWER):
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self.r_txpower = byte
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self.log(str(self)+" Radio reporting TX power is "+str(self.r_txpower)+" dBm", RNodeInterface.LOG_DEBUG)
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elif (command == KISS.CMD_SF):
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self.r_sf = byte
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self.log(str(self)+" Radio reporting spreading factor is "+str(self.r_sf), RNodeInterface.LOG_DEBUG)
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self.updateBitrate()
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elif (command == KISS.CMD_CR):
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self.r_cr = byte
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self.log(str(self)+" Radio reporting coding rate is "+str(self.r_cr), RNodeInterface.LOG_DEBUG)
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self.updateBitrate()
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elif (command == KISS.CMD_RADIO_STATE):
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self.r_state = byte
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elif (command == KISS.CMD_RADIO_LOCK):
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self.r_lock = byte
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elif (command == KISS.CMD_STAT_RX):
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if (byte == KISS.FESC):
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escape = True
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else:
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if (escape):
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if (byte == KISS.TFEND):
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byte = KISS.FEND
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if (byte == KISS.TFESC):
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byte = KISS.FESC
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escape = False
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command_buffer = command_buffer+bytes([byte])
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if (len(command_buffer) == 4):
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self.r_stat_rx = ord(command_buffer[0]) << 24 | ord(command_buffer[1]) << 16 | ord(command_buffer[2]) << 8 | ord(command_buffer[3])
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elif (command == KISS.CMD_STAT_TX):
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if (byte == KISS.FESC):
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escape = True
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else:
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if (escape):
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if (byte == KISS.TFEND):
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byte = KISS.FEND
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if (byte == KISS.TFESC):
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byte = KISS.FESC
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escape = False
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command_buffer = command_buffer+bytes([byte])
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if (len(command_buffer) == 4):
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self.r_stat_tx = ord(command_buffer[0]) << 24 | ord(command_buffer[1]) << 16 | ord(command_buffer[2]) << 8 | ord(command_buffer[3])
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elif (command == KISS.CMD_STAT_RSSI):
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self.r_stat_rssi = byte-RNodeInterface.RSSI_OFFSET
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elif (command == KISS.CMD_STAT_SNR):
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|
self.r_stat_snr = int.from_bytes(bytes([byte]), byteorder="big", signed=True) * 0.25
|
|
elif (command == KISS.CMD_RANDOM):
|
|
self.r_random = byte
|
|
elif (command == KISS.CMD_ERROR):
|
|
if (byte == KISS.ERROR_INITRADIO):
|
|
self.log(str(self)+" hardware initialisation error (code "+RNS.hexrep(byte)+")", RNodeInterface.LOG_ERROR)
|
|
elif (byte == KISS.ERROR_INITRADIO):
|
|
self.log(str(self)+" hardware TX error (code "+RNS.hexrep(byte)+")", RNodeInterface.LOG_ERROR)
|
|
else:
|
|
self.log(str(self)+" hardware error (code "+RNS.hexrep(byte)+")", RNodeInterface.LOG_ERROR)
|
|
elif (command == KISS.CMD_READY):
|
|
self.process_queue()
|
|
|
|
else:
|
|
time_since_last = int(time.time()*1000) - last_read_ms
|
|
if len(data_buffer) > 0 and time_since_last > self.timeout:
|
|
self.log(str(self)+" serial read timeout", RNodeInterface.LOG_DEBUG)
|
|
data_buffer = b""
|
|
in_frame = False
|
|
command = KISS.CMD_UNKNOWN
|
|
escape = False
|
|
sleep(0.08)
|
|
|
|
except Exception as e:
|
|
self.online = False
|
|
self.log("A serial port error occurred, the contained exception was: "+str(e), RNodeInterface.LOG_ERROR)
|
|
self.log("The interface "+str(self.name)+" is now offline.", RNodeInterface.LOG_ERROR)
|
|
|
|
def log(self, msg, level=3):
|
|
logtimefmt = "%Y-%m-%d %H:%M:%S"
|
|
if self.loglevel >= level:
|
|
timestamp = time.time()
|
|
logstring = "["+time.strftime(logtimefmt)+"] ["+self.loglevelname(level)+"] "+msg
|
|
print(logstring)
|
|
|
|
def loglevelname(self, level):
|
|
if (level == RNodeInterface.LOG_CRITICAL):
|
|
return "Critical"
|
|
if (level == RNodeInterface.LOG_ERROR):
|
|
return "Error"
|
|
if (level == RNodeInterface.LOG_WARNING):
|
|
return "Warning"
|
|
if (level == RNodeInterface.LOG_NOTICE):
|
|
return "Notice"
|
|
if (level == RNodeInterface.LOG_INFO):
|
|
return "Info"
|
|
if (level == RNodeInterface.LOG_VERBOSE):
|
|
return "Verbose"
|
|
if (level == RNodeInterface.LOG_DEBUG):
|
|
return "Debug"
|
|
if (level == RNodeInterface.LOG_EXTREME):
|
|
return "Extra"
|
|
|
|
def hexrep(data, delimit=True):
|
|
delimiter = ":"
|
|
if not delimit:
|
|
delimiter = ""
|
|
hexrep = delimiter.join("{:02x}".format(ord(c)) for c in data)
|
|
return hexrep
|
|
|
|
def __str__(self):
|
|
return "RNodeInterface["+self.name+"]"
|
|
|