from .Interface import Interface from time import sleep import sys import threading import time import math import RNS class KISS(): FEND = 0xC0 FESC = 0xDB TFEND = 0xDC TFESC = 0xDD CMD_UNKNOWN = 0xFE CMD_DATA = 0x00 CMD_FREQUENCY = 0x01 CMD_BANDWIDTH = 0x02 CMD_TXPOWER = 0x03 CMD_SF = 0x04 CMD_CR = 0x05 CMD_RADIO_STATE = 0x06 CMD_RADIO_LOCK = 0x07 CMD_DETECT = 0x08 CMD_READY = 0x0F CMD_STAT_RX = 0x21 CMD_STAT_TX = 0x22 CMD_STAT_RSSI = 0x23 CMD_STAT_SNR = 0x24 CMD_BLINK = 0x30 CMD_RANDOM = 0x40 CMD_PLATFORM = 0x48 CMD_MCU = 0x49 CMD_FW_VERSION = 0x50 CMD_ROM_READ = 0x51 CMD_RESET = 0x55 DETECT_REQ = 0x73 DETECT_RESP = 0x46 RADIO_STATE_OFF = 0x00 RADIO_STATE_ON = 0x01 RADIO_STATE_ASK = 0xFF CMD_ERROR = 0x90 ERROR_INITRADIO = 0x01 ERROR_TXFAILED = 0x02 ERROR_EEPROM_LOCKED = 0x03 PLATFORM_AVR = 0x90 PLATFORM_ESP32 = 0x80 @staticmethod def escape(data): data = data.replace(bytes([0xdb]), bytes([0xdb, 0xdd])) data = data.replace(bytes([0xc0]), bytes([0xdb, 0xdc])) return data class RNodeInterface(Interface): MAX_CHUNK = 32768 owner = None port = None speed = None databits = None parity = None stopbits = None serial = None FREQ_MIN = 137000000 FREQ_MAX = 1020000000 RSSI_OFFSET = 157 CALLSIGN_MAX_LEN = 32 REQUIRED_FW_VER_MAJ = 1 REQUIRED_FW_VER_MIN = 26 def __init__(self, owner, name, port, frequency = None, bandwidth = None, txpower = None, sf = None, cr = None, flow_control = False, id_interval = None, id_callsign = None): import importlib if importlib.util.find_spec('serial') != None: import serial else: RNS.log("Using the RNode interface requires a serial communication module to be installed.", RNS.LOG_CRITICAL) RNS.log("You can install one with the command: python3 -m pip install pyserial", RNS.LOG_CRITICAL) RNS.panic() self.rxb = 0 self.txb = 0 self.pyserial = serial self.serial = None self.owner = owner self.name = name self.port = port self.speed = 115200 self.databits = 8 self.parity = serial.PARITY_NONE self.stopbits = 1 self.timeout = 100 self.online = False self.frequency = frequency self.bandwidth = bandwidth self.txpower = txpower self.sf = sf self.cr = cr self.state = KISS.RADIO_STATE_OFF self.bitrate = 0 self.platform = None self.mcu = None self.detected = False self.firmware_ok = False self.maj_version = 0 self.min_version = 0 self.last_id = 0 self.first_tx = None self.r_frequency = None self.r_bandwidth = None self.r_txpower = None self.r_sf = None self.r_cr = None self.r_state = None self.r_lock = None self.r_stat_rx = None self.r_stat_tx = None self.r_stat_rssi = None self.r_random = None self.packet_queue = [] self.flow_control = flow_control self.interface_ready = False self.validcfg = True if (self.frequency < RNodeInterface.FREQ_MIN or self.frequency > RNodeInterface.FREQ_MAX): RNS.log("Invalid frequency configured for "+str(self), RNS.LOG_ERROR) self.validcfg = False if (self.txpower < 0 or self.txpower > 17): RNS.log("Invalid TX power configured for "+str(self), RNS.LOG_ERROR) self.validcfg = False if (self.bandwidth < 7800 or self.bandwidth > 500000): RNS.log("Invalid bandwidth configured for "+str(self), RNS.LOG_ERROR) self.validcfg = False if (self.sf < 7 or self.sf > 12): RNS.log("Invalid spreading factor configured for "+str(self), RNS.LOG_ERROR) self.validcfg = False if (self.cr < 5 or self.cr > 8): RNS.log("Invalid coding rate configured for "+str(self), RNS.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.encode("utf-8") self.id_interval = id_interval else: RNS.log("The encoded ID callsign for "+str(self)+" exceeds the max length of "+str(RNodeInterface.CALLSIGN_MAX_LEN)+" bytes.", RNS.LOG_ERROR) self.validcfg = False else: self.id_interval = None self.id_callsign = None if (not self.validcfg): raise ValueError("The configuration for "+str(self)+" contains errors, interface is offline") try: self.open_port() except Exception as e: RNS.log("Could not open serial port for interface "+str(self), RNS.LOG_ERROR) raise e if self.serial.is_open: self.configure_device() else: raise IOError("Could not open serial port") def open_port(self): RNS.log("Opening serial port "+self.port+"...") self.serial = self.pyserial.Serial( port = self.port, baudrate = self.speed, bytesize = self.databits, parity = self.parity, stopbits = self.stopbits, xonxoff = False, rtscts = False, timeout = 0, inter_byte_timeout = None, write_timeout = None, dsrdtr = False, ) def configure_device(self): sleep(2.0) thread = threading.Thread(target=self.readLoop) thread.setDaemon(True) thread.start() self.detect() sleep(0.1) if not self.detected: raise IOError("Could not detect device") else: if self.platform == KISS.PLATFORM_ESP32: RNS.log("Resetting ESP32-based device before configuration...", RNS.LOG_VERBOSE) self.hard_reset() self.online = True RNS.log("Serial port "+self.port+" is now open") RNS.log("Configuring RNode interface...", RNS.LOG_VERBOSE) self.initRadio() if (self.validateRadioState()): self.interface_ready = True RNS.log(str(self)+" is configured and powered up") sleep(1.0) else: RNS.log("After configuring "+str(self)+", the reported radio parameters did not match your configuration.", RNS.LOG_ERROR) RNS.log("Make sure that your hardware actually supports the parameters specified in the configuration", RNS.LOG_ERROR) RNS.log("Aborting RNode startup", RNS.LOG_ERROR) self.serial.close() raise IOError("RNode interface did not pass configuration validation") def initRadio(self): self.setFrequency() self.setBandwidth() self.setTXPower() self.setSpreadingFactor() self.setCodingRate() self.setRadioState(KISS.RADIO_STATE_ON) def detect(self): kiss_command = bytes([KISS.FEND, KISS.CMD_DETECT, KISS.DETECT_REQ, KISS.FEND, KISS.CMD_FW_VERSION, 0x00, KISS.FEND, KISS.CMD_PLATFORM, 0x00, KISS.FEND, KISS.CMD_MCU, 0x00, KISS.FEND]) written = self.serial.write(kiss_command) if written != len(kiss_command): raise IOError("An IO error occurred while detecting hardware for "+self(str)) def hard_reset(self): kiss_command = bytes([KISS.FEND, KISS.CMD_RESET, 0xf8, KISS.FEND]) written = self.serial.write(kiss_command) if written != len(kiss_command): raise IOError("An IO error occurred while restarting device") sleep(2.25); def setFrequency(self): c1 = self.frequency >> 24 c2 = self.frequency >> 16 & 0xFF c3 = self.frequency >> 8 & 0xFF c4 = self.frequency & 0xFF data = KISS.escape(bytes([c1])+bytes([c2])+bytes([c3])+bytes([c4])) kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_FREQUENCY])+data+bytes([KISS.FEND]) written = self.serial.write(kiss_command) if written != len(kiss_command): raise IOError("An IO error occurred while configuring frequency for "+self(str)) def setBandwidth(self): c1 = self.bandwidth >> 24 c2 = self.bandwidth >> 16 & 0xFF c3 = self.bandwidth >> 8 & 0xFF c4 = self.bandwidth & 0xFF data = KISS.escape(bytes([c1])+bytes([c2])+bytes([c3])+bytes([c4])) kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_BANDWIDTH])+data+bytes([KISS.FEND]) written = self.serial.write(kiss_command) if written != len(kiss_command): raise IOError("An IO error occurred while configuring bandwidth for "+self(str)) def setTXPower(self): txp = bytes([self.txpower]) kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_TXPOWER])+txp+bytes([KISS.FEND]) written = self.serial.write(kiss_command) if written != len(kiss_command): raise IOError("An IO error occurred while configuring TX power for "+self(str)) def setSpreadingFactor(self): sf = bytes([self.sf]) kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_SF])+sf+bytes([KISS.FEND]) written = self.serial.write(kiss_command) if written != len(kiss_command): raise IOError("An IO error occurred while configuring spreading factor for "+self(str)) def setCodingRate(self): cr = bytes([self.cr]) kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_CR])+cr+bytes([KISS.FEND]) written = self.serial.write(kiss_command) if written != len(kiss_command): raise IOError("An IO error occurred while configuring coding rate for "+self(str)) def setRadioState(self, state): self.state = state kiss_command = bytes([KISS.FEND])+bytes([KISS.CMD_RADIO_STATE])+bytes([state])+bytes([KISS.FEND]) written = self.serial.write(kiss_command) if written != len(kiss_command): raise IOError("An IO error occurred while configuring radio state for "+self(str)) def validate_firmware(self): if (self.maj_version >= RNodeInterface.REQUIRED_FW_VER_MAJ): if (self.min_version >= RNodeInterface.REQUIRED_FW_VER_MIN): self.firmware_ok = True if self.firmware_ok: return RNS.log("The firmware version of the connected RNode is "+str(self.maj_version)+"."+str(self.min_version), RNS.LOG_ERROR) RNS.log("This version of Reticulum requires at least version "+str(RNodeInterface.REQUIRED_FW_VER_MAJ)+"."+str(RNodeInterface.REQUIRED_FW_VER_MIN), RNS.LOG_ERROR) RNS.log("Please update your RNode firmware with rnodeconf (https://github.com/markqvist/rnodeconfigutil/)") RNS.panic() def validateRadioState(self): RNS.log("Wating for radio configuration validation for "+str(self)+"...", RNS.LOG_VERBOSE) sleep(0.25); if (self.frequency != self.r_frequency): RNS.log("Frequency mismatch", RNS.LOG_ERROR) self.validcfg = False if (self.bandwidth != self.r_bandwidth): RNS.log("Bandwidth mismatch", RNS.LOG_ERROR) self.validcfg = False if (self.txpower != self.r_txpower): RNS.log("TX power mismatch", RNS.LOG_ERROR) self.validcfg = False if (self.sf != self.r_sf): RNS.log("Spreading factor mismatch", RNS.LOG_ERROR) self.validcfg = False if (self.state != self.r_state): RNS.log("Radio state mismatch", RNS.LOG_ERROR) self.validcfg = False if (self.validcfg): return True else: return False def updateBitrate(self): try: self.bitrate = self.r_sf * ( (4.0/self.r_cr) / (math.pow(2,self.r_sf)/(self.r_bandwidth/1000)) ) * 1000 self.bitrate_kbps = round(self.bitrate/1000.0, 2) RNS.log(str(self)+" On-air bitrate is now "+str(self.bitrate_kbps)+ " kbps", RNS.LOG_VERBOSE) except: self.bitrate = 0 def processIncoming(self, data): self.rxb += len(data) self.owner.inbound(data, self) self.r_stat_rssi = None self.r_stat_snr = None def processOutgoing(self,data): datalen = len(data) if self.online: if self.interface_ready: if self.flow_control: self.interface_ready = False if data == self.id_callsign: self.first_tx = None else: if self.first_tx == None: self.first_tx = time.time() data = KISS.escape(data) frame = bytes([0xc0])+bytes([0x00])+data+bytes([0xc0]) written = self.serial.write(frame) self.txb += datalen if written != len(frame): raise IOError("Serial interface only wrote "+str(written)+" bytes of "+str(len(data))) else: self.queue(data) def queue(self, data): self.packet_queue.append(data) def process_queue(self): if len(self.packet_queue) > 0: data = self.packet_queue.pop(0) self.interface_ready = True self.processOutgoing(data) elif len(self.packet_queue) == 0: self.interface_ready = True def readLoop(self): try: in_frame = False escape = False command = KISS.CMD_UNKNOWN data_buffer = b"" command_buffer = b"" last_read_ms = int(time.time()*1000) while self.serial.is_open: if self.serial.in_waiting: byte = ord(self.serial.read(1)) last_read_ms = int(time.time()*1000) if (in_frame and byte == KISS.FEND and command == KISS.CMD_DATA): in_frame = False self.processIncoming(data_buffer) data_buffer = b"" command_buffer = b"" elif (byte == KISS.FEND): in_frame = True command = KISS.CMD_UNKNOWN data_buffer = b"" command_buffer = b"" elif (in_frame and len(data_buffer) < RNS.Reticulum.MTU): if (len(data_buffer) == 0 and command == KISS.CMD_UNKNOWN): command = byte elif (command == KISS.CMD_DATA): if (byte == KISS.FESC): escape = True else: if (escape): if (byte == KISS.TFEND): byte = KISS.FEND if (byte == KISS.TFESC): byte = KISS.FESC escape = False data_buffer = data_buffer+bytes([byte]) elif (command == KISS.CMD_FREQUENCY): if (byte == KISS.FESC): escape = True else: if (escape): if (byte == KISS.TFEND): byte = KISS.FEND if (byte == KISS.TFESC): byte = KISS.FESC escape = False command_buffer = command_buffer+bytes([byte]) if (len(command_buffer) == 4): self.r_frequency = command_buffer[0] << 24 | command_buffer[1] << 16 | command_buffer[2] << 8 | command_buffer[3] RNS.log(str(self)+" Radio reporting frequency is "+str(self.r_frequency/1000000.0)+" MHz", RNS.LOG_DEBUG) self.updateBitrate() elif (command == KISS.CMD_BANDWIDTH): if (byte == KISS.FESC): escape = True else: if (escape): if (byte == KISS.TFEND): byte = KISS.FEND if (byte == KISS.TFESC): byte = KISS.FESC escape = False command_buffer = command_buffer+bytes([byte]) if (len(command_buffer) == 4): self.r_bandwidth = command_buffer[0] << 24 | command_buffer[1] << 16 | command_buffer[2] << 8 | command_buffer[3] RNS.log(str(self)+" Radio reporting bandwidth is "+str(self.r_bandwidth/1000.0)+" KHz", RNS.LOG_DEBUG) self.updateBitrate() elif (command == KISS.CMD_TXPOWER): self.r_txpower = byte RNS.log(str(self)+" Radio reporting TX power is "+str(self.r_txpower)+" dBm", RNS.LOG_DEBUG) elif (command == KISS.CMD_SF): self.r_sf = byte RNS.log(str(self)+" Radio reporting spreading factor is "+str(self.r_sf), RNS.LOG_DEBUG) self.updateBitrate() elif (command == KISS.CMD_CR): self.r_cr = byte RNS.log(str(self)+" Radio reporting coding rate is "+str(self.r_cr), RNS.LOG_DEBUG) self.updateBitrate() elif (command == KISS.CMD_RADIO_STATE): self.r_state = byte if self.r_state: pass #RNS.log(str(self)+" Radio reporting state is online", RNS.LOG_DEBUG) else: RNS.log(str(self)+" Radio reporting state is offline", RNS.LOG_DEBUG) elif (command == KISS.CMD_RADIO_LOCK): self.r_lock = byte elif (command == KISS.CMD_FW_VERSION): if (byte == KISS.FESC): escape = True else: if (escape): if (byte == KISS.TFEND): byte = KISS.FEND if (byte == KISS.TFESC): byte = KISS.FESC escape = False command_buffer = command_buffer+bytes([byte]) if (len(command_buffer) == 2): self.maj_version = int(command_buffer[0]) self.min_version = int(command_buffer[1]) self.validate_firmware() elif (command == KISS.CMD_STAT_RX): if (byte == KISS.FESC): escape = True else: if (escape): if (byte == KISS.TFEND): byte = KISS.FEND if (byte == KISS.TFESC): byte = KISS.FESC escape = False command_buffer = command_buffer+bytes([byte]) 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]) elif (command == KISS.CMD_STAT_TX): if (byte == KISS.FESC): escape = True else: if (escape): if (byte == KISS.TFEND): byte = KISS.FEND if (byte == KISS.TFESC): byte = KISS.FESC escape = False command_buffer = command_buffer+bytes([byte]) 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]) elif (command == KISS.CMD_STAT_RSSI): self.r_stat_rssi = byte-RNodeInterface.RSSI_OFFSET elif (command == KISS.CMD_STAT_SNR): 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_PLATFORM): self.platform = byte elif (command == KISS.CMD_MCU): self.mcu = byte elif (command == KISS.CMD_ERROR): if (byte == KISS.ERROR_INITRADIO): RNS.log(str(self)+" hardware initialisation error (code "+RNS.hexrep(byte)+")", RNS.LOG_ERROR) raise IOError("Radio initialisation failure") elif (byte == KISS.ERROR_INITRADIO): RNS.log(str(self)+" hardware TX error (code "+RNS.hexrep(byte)+")", RNS.LOG_ERROR) raise IOError("Hardware transmit failure") else: RNS.log(str(self)+" hardware error (code "+RNS.hexrep(byte)+")", RNS.LOG_ERROR) raise IOError("Unknown hardware failure") elif (command == KISS.CMD_RESET): if (byte == 0xF8): if self.platform == KISS.PLATFORM_ESP32: if self.online: RNS.log("Detected reset while device was online, reinitialising device...", RNS.LOG_ERROR) raise IOError("ESP32 reset") elif (command == KISS.CMD_READY): self.process_queue() elif (command == KISS.CMD_DETECT): if byte == KISS.DETECT_RESP: self.detected = True else: self.detected = False else: time_since_last = int(time.time()*1000) - last_read_ms if len(data_buffer) > 0 and time_since_last > self.timeout: RNS.log(str(self)+" serial read timeout", RNS.LOG_DEBUG) data_buffer = b"" in_frame = False command = KISS.CMD_UNKNOWN escape = False if self.id_interval != None and self.id_callsign != None: if self.first_tx != None: if time.time() > self.first_tx + self.id_interval: RNS.log("Interface "+str(self)+" is transmitting beacon data: "+str(self.id_callsign.decode("utf-8")), RNS.LOG_DEBUG) self.processOutgoing(self.id_callsign) sleep(0.08) except Exception as e: self.online = False RNS.log("A serial port error occurred, the contained exception was: "+str(e), RNS.LOG_ERROR) RNS.log("The interface "+str(self)+" experienced an unrecoverable error and is now offline.", RNS.LOG_ERROR) if RNS.Reticulum.panic_on_interface_error: RNS.panic() RNS.log("Reticulum will attempt to reconnect the interface periodically.", RNS.LOG_ERROR) self.online = False self.serial.close() self.reconnect_port() def reconnect_port(self): while not self.online: try: time.sleep(3.5) RNS.log("Attempting to reconnect serial port "+str(self.port)+" for "+str(self)+"...", RNS.LOG_VERBOSE) self.open_port() if self.serial.is_open: self.configure_device() except Exception as e: RNS.log("Error while reconnecting port, the contained exception was: "+str(e), RNS.LOG_ERROR) RNS.log("Reconnected serial port for "+str(self)) def __str__(self): return "RNodeInterface["+str(self.name)+"]"