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WifiModem.ino
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WifiModem.ino
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// -----------------------------------------------------------------------------
// WiFi Modem and Telnet Server
// Copyright (C) 2018 David Hansel
// Copyright (C) 2020 Marco Maccaferri
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
// -----------------------------------------------------------------------------
#include <ESP8266WiFi.h>
#include <WiFiUdp.h>
#include <EEPROM.h>
WiFiServer server(23);
WiFiClient modemClient;
WiFiClient telnetClient;
WiFiUDP udp;
int udpPort;
IPAddress udpAddr;
char packetBuffer[UDP_TX_PACKET_MAX_SIZE];
unsigned long lastConnectCheck = 0;
unsigned long prevCharTime = 0;
unsigned long prevRingTime = 0;
uint8_t modemEscapeState = 0, modemExtCodes = 0, modemReg[255];
bool modemCommandMode = true, modemEcho = true, modemQuiet = false, modemVerbose = true;
static int linespeeds[] = {0, 75, 110, 300, 600, 1200, 2400, 4800, 7200, 9600, 12000, 14400};
#define NSPEEDS (sizeof(linespeeds)/sizeof(int))
#define LED_PIN 2
#define DCD_PIN 2
#define REG_ESC 2
#define REG_CR 3
#define REG_LF 4
#define REG_BSP 5
#define REG_GUARDTIME 12
#define REG_TELNET 15
#define REG_LINESPEED 37
#define REG_CURLINESPEED 43
#define RING_MILLIS 4500
enum
{
E_OK = 0,
E_CONNECT,
E_RING,
E_NOCARRIER,
E_ERROR,
E_CONNECT1200,
E_NODIALTONE,
E_BUSY,
E_NOANSWER,
E_CONNECT600,
E_CONNECT2400,
E_CONNECT4800,
E_CONNECT9600,
E_CONNECT14400,
E_CONNECT19200
};
struct TelnetStateStruct
{
uint8_t cmdLen;
uint8_t cmd[4];
bool sendBinary;
bool receiveBinary;
bool receivedCR;
bool subnegotiation;
} modemTelnetState, clientTelnetState;
#define MAGICVAL 0xF0E1D2C3B4A59687
struct ModemDataStruct
{
uint64_t magic;
uint32_t baud;
byte bits;
byte parity;
byte stopbits;
byte silent;
byte unused;
char telnetTerminalType[32];
uint8_t reg[256];
} ModemData;
SerialConfig GetSerialConfig()
{
if( ModemData.bits==5 && ModemData.parity==0 && ModemData.stopbits==1 )
return SERIAL_5N1;
else if( ModemData.bits==5 && ModemData.parity==0 && ModemData.stopbits==2 )
return SERIAL_5N2;
else if( ModemData.bits==5 && ModemData.parity==1 && ModemData.stopbits==1 )
return SERIAL_5E1;
else if( ModemData.bits==5 && ModemData.parity==1 && ModemData.stopbits==2 )
return SERIAL_5E2;
else if( ModemData.bits==5 && ModemData.parity==2 && ModemData.stopbits==1 )
return SERIAL_5O1;
else if( ModemData.bits==5 && ModemData.parity==2 && ModemData.stopbits==2 )
return SERIAL_5O2;
else if( ModemData.bits==6 && ModemData.parity==0 && ModemData.stopbits==1 )
return SERIAL_6N1;
else if( ModemData.bits==6 && ModemData.parity==0 && ModemData.stopbits==2 )
return SERIAL_6N2;
else if( ModemData.bits==6 && ModemData.parity==1 && ModemData.stopbits==1 )
return SERIAL_6E1;
else if( ModemData.bits==6 && ModemData.parity==1 && ModemData.stopbits==2 )
return SERIAL_6E2;
else if( ModemData.bits==6 && ModemData.parity==2 && ModemData.stopbits==1 )
return SERIAL_6O1;
else if( ModemData.bits==6 && ModemData.parity==2 && ModemData.stopbits==2 )
return SERIAL_6O2;
else if( ModemData.bits==7 && ModemData.parity==0 && ModemData.stopbits==1 )
return SERIAL_7N1;
else if( ModemData.bits==7 && ModemData.parity==0 && ModemData.stopbits==2 )
return SERIAL_7N2;
else if( ModemData.bits==7 && ModemData.parity==1 && ModemData.stopbits==1 )
return SERIAL_7E1;
else if( ModemData.bits==7 && ModemData.parity==1 && ModemData.stopbits==2 )
return SERIAL_7E2;
else if( ModemData.bits==7 && ModemData.parity==2 && ModemData.stopbits==1 )
return SERIAL_7O1;
else if( ModemData.bits==7 && ModemData.parity==2 && ModemData.stopbits==2 )
return SERIAL_7O2;
else if( ModemData.bits==8 && ModemData.parity==0 && ModemData.stopbits==1 )
return SERIAL_8N1;
else if( ModemData.bits==8 && ModemData.parity==0 && ModemData.stopbits==2 )
return SERIAL_8N2;
else if( ModemData.bits==8 && ModemData.parity==1 && ModemData.stopbits==1 )
return SERIAL_8E1;
else if( ModemData.bits==8 && ModemData.parity==1 && ModemData.stopbits==2 )
return SERIAL_8E2;
else if( ModemData.bits==8 && ModemData.parity==2 && ModemData.stopbits==1 )
return SERIAL_8O1;
else if( ModemData.bits==8 && ModemData.parity==2 && ModemData.stopbits==2 )
return SERIAL_8O2;
else
return SERIAL_8N1;
}
void applySerialSettings()
{
Serial.flush();
Serial.end();
delay(100);
Serial.begin(ModemData.baud, GetSerialConfig());
}
void clearSerialBuffer()
{
// empty the serial buffer
delay(100);
while( Serial.available()>0 ) { Serial.read(); delay(10); }
}
void setup()
{
pinMode(LED_PIN, OUTPUT);
digitalWrite(LED_PIN, HIGH);
pinMode(DCD_PIN, OUTPUT);
digitalWrite(DCD_PIN, HIGH);
// read serial info
EEPROM.begin(1024);
EEPROM.get(0, ModemData);
if( ModemData.magic != MAGICVAL )
{
// use default settings
memset(&ModemData, 0, sizeof(ModemData));
ModemData.magic = MAGICVAL;
ModemData.baud = 9600;
ModemData.bits = 8;
ModemData.parity = 0;
ModemData.stopbits = 1;
ModemData.silent = false;
strcpy(ModemData.telnetTerminalType, "vt100");
EEPROM.put(0, ModemData);
EEPROM.commit();
}
// start serial interface
Serial.begin(ModemData.baud);
// set sdk parameters
if (!WiFi.getAutoConnect() ) WiFi.setAutoConnect(true);
if (!WiFi.getAutoReconnect() ) WiFi.setAutoReconnect(true);
if (!WiFi.getPersistent() ) WiFi.persistent(true);
// start WiFi interface
WiFi.mode(WIFI_STA);
WiFi.begin();
lastConnectCheck = millis();
server.begin();
server.setNoDelay(true);
resetModemState();
// flush serial input buffer
while( Serial.available() ) Serial.read();
}
void resetTelnetState(struct TelnetStateStruct &s)
{
s.cmdLen = 0;
s.sendBinary = false;
s.receiveBinary = false;
s.receivedCR = false;
s.subnegotiation = false;
}
void resetModemState()
{
const uint8_t regDefaults[] = {2, '+',
3, '\r',
4, '\n',
5, 8,
6, 2,
7, 50,
8, 2,
9, 6,
10, 14,
11, 95,
12, 50,
25, 5,
38, 20};
for(int i=0; i<256; i++) modemReg[i] = 0;
for(int i=0; i<sizeof(regDefaults); i+=2) modemReg[regDefaults[i]] = regDefaults[i+1];
modemEscapeState = 0;
modemExtCodes = 0;
modemCommandMode = true;
modemEcho = true;
modemQuiet = false;
modemVerbose = true;
if( modemClient.connected() )
{
modemClient.stop();
digitalWrite(DCD_PIN, HIGH);
}
if( telnetClient.connected() )
{
telnetClient.stop();
digitalWrite(DCD_PIN, HIGH);
}
}
void printModemCR()
{
Serial.print(char(modemReg[REG_CR]));
if( modemVerbose ) Serial.print(char(modemReg[REG_LF]));
}
void printModemResult(byte code)
{
if( !modemQuiet )
{
if( modemVerbose )
{
printModemCR();
switch( code )
{
case E_OK : Serial.print("OK"); break;
case E_CONNECT : Serial.print("CONNECT"); break;
case E_RING : Serial.print("RING"); break;
case E_NOCARRIER : Serial.print("NO CARRIER"); break;
case E_ERROR : Serial.print("ERROR"); break;
case E_CONNECT1200 : Serial.print("CONNECT 1200"); break;
case E_NODIALTONE : Serial.print("NO DIALTONE"); break;
case E_BUSY : Serial.print("BUSY"); break;
case E_NOANSWER : Serial.print("NO ANSWER"); break;
case E_CONNECT600 : Serial.print("CONNECT 600"); break;
case E_CONNECT2400 : Serial.print("CONNECT 2400"); break;
case E_CONNECT4800 : Serial.print("CONNECT 4800"); break;
case E_CONNECT9600 : Serial.print("CONNECT 9600"); break;
case E_CONNECT14400 : Serial.print("CONNECT 14400"); break;
default:
{
char buf[20];
sprintf(buf, "ERROR%i", code);
Serial.print(buf);
break;
}
}
}
else
Serial.print(code);
printModemCR();
}
}
long getCmdParam(char *cmd, int &ptr)
{
long res = 0;
ptr++;
while( isdigit(cmd[ptr]) )
{
res = (res * 10) + (cmd[ptr] - '0');
ptr++;
}
return res;
}
void getCmdParam(char *cmd, char *res, int &ptr)
{
ptr++;
if( cmd[ptr]=='"' )
{
ptr++;
while( cmd[ptr]!=0 && cmd[ptr]!='"' )
{
*res++ = cmd[ptr++];
}
if( cmd[ptr]=='"' )
ptr++;
}
*res = 0;
}
// returns TRUE if input byte "b" is part of a telnet protocol sequence and should
// NOT be passed through to the serial interface
bool handleTelnetProtocol(uint8_t b, WiFiClient &client, struct TelnetStateStruct &state)
{
#define T_SE 240 // 0xf0
#define T_NOP 241 // 0xf1
#define T_BREAK 243 // 0xf3
#define T_GOAHEAD 249 // 0xf9
#define T_SB 250 // 0xfa
#define T_WILL 251 // 0xfb
#define T_WONT 252 // 0xfc
#define T_DO 253 // 0xfd
#define T_DONT 254 // 0xfe
#define T_IAC 255 // 0xff
#define TO_SEND_BINARY 0
#define TO_ECHO 1
#define TO_SUPPRESS_GO_AHEAD 3
#define TO_TERMINAL_TYPE 24
// if not handling telnet protocol then just return
if( !modemReg[REG_TELNET] ) return false;
// ---- handle incoming sub-negotiation sequences
if( state.subnegotiation )
{
if( modemReg[REG_TELNET]>1 ) {Serial.print('<'); Serial.print(b, HEX);}
if( state.cmdLen==0 && b == T_IAC )
state.cmdLen = 1;
else if( state.cmdLen==1 && b == T_SE )
{
state.subnegotiation = false;
state.cmdLen = 0;
}
else
state.cmdLen = 0;
return true;
}
// ---- handle CR-NUL sequences
if( state.receivedCR )
{
state.receivedCR = false;
if( b==0 )
{
// CR->NUL => CR (i.e. ignore the NUL)
if( modemReg[REG_TELNET]>1 ) Serial.print("<0d<00");
return true;
}
}
else if( b == 0x0d && state.cmdLen==0 && !state.receiveBinary )
{
// received CR while not in binary mode => remember but pass through
state.receivedCR = true;
return false;
}
// ---- handle IAC sequences
if( state.cmdLen==0 )
{
// waiting for IAC byte
if( b == T_IAC )
{
state.cmdLen = 1;
state.cmd[0] = T_IAC;
if( modemReg[REG_TELNET]>1 ) {Serial.print('<'); Serial.print(b, HEX);}
return true;
}
}
else if( state.cmdLen==1 )
{
if( modemReg[REG_TELNET]>1 ) {Serial.print('<'); Serial.print(b, HEX);}
// received second byte of IAC sequence
if( b == T_IAC )
{
// IAC->IAC sequence means regular 0xff data value
state.cmdLen = 0;
// we already skipped the first IAC (0xff), so just return 'false' to pass this one through
return false;
}
else if( b == T_NOP || b == T_BREAK || b == T_GOAHEAD )
{
// NOP, BREAK, GOAHEAD => do nothing and skip
state.cmdLen = 0;
return true;
}
else if( b == T_SB )
{
// start of sub-negotiation
state.subnegotiation = true;
state.cmdLen = 0;
return true;
}
else
{
// record second byte of sequence
state.cmdLen = 2;
state.cmd[1] = b;
return true;
}
}
else if( state.cmdLen==2 )
{
// received third (i.e. last) byte of IAC sequence
if( modemReg[REG_TELNET]>1 ) {Serial.print('<'); Serial.print(b, HEX);}
state.cmd[2] = b;
bool reply = true;
if( state.cmd[1] == T_WILL )
{
switch( state.cmd[2] )
{
case TO_SEND_BINARY: state.cmd[1] = T_DO; state.receiveBinary = true; break;
case TO_ECHO: state.cmd[1] = T_DO; break;
case TO_SUPPRESS_GO_AHEAD: state.cmd[1] = T_DO; break;
default: state.cmd[1] = T_DONT; break;
}
}
else if( state.cmd[1] == T_WONT )
{
switch( state.cmd[2] )
{
case TO_SEND_BINARY: state.cmd[1] = T_DO; state.receiveBinary = false; break;
}
state.cmd[1] = T_DONT;
}
else if( state.cmd[1] == T_DO )
{
switch( state.cmd[2] )
{
case TO_SEND_BINARY: state.cmd[1] = T_WILL; state.sendBinary = true; break;
case TO_SUPPRESS_GO_AHEAD: state.cmd[1] = T_WILL; break;
case TO_TERMINAL_TYPE: state.cmd[1] = ModemData.telnetTerminalType[0]==0 ? T_WONT : T_WILL; break;
default: state.cmd[1] = T_WONT; break;
}
}
else if( state.cmd[1] == T_DONT )
{
switch( state.cmd[2] )
{
case TO_SEND_BINARY: state.cmd[1] = T_WILL; state.sendBinary = false; break;
}
state.cmd[1] = T_WONT;
}
else
reply = false;
// send reply if necessary
if( reply )
{
if( modemReg[REG_TELNET]>1 )
for(int k=0; k<3; k++) {Serial.print('>'); Serial.print(state.cmd[k], HEX);}
client.write(state.cmd, 3);
if( state.cmd[1] == T_WILL && state.cmd[2] == TO_TERMINAL_TYPE )
{
// send terminal-type subnegoatiation sequence
uint8_t buf[110], i, n=0;
buf[n++] = T_IAC;
buf[n++] = T_SB;
buf[n++] = TO_TERMINAL_TYPE;
buf[n++] = 0; // IS
for(i=0; i<100 && ModemData.telnetTerminalType[i]>=32 && ModemData.telnetTerminalType[i]<127; i++)
buf[n++] = ModemData.telnetTerminalType[i];
buf[n++] = T_IAC;
buf[n++] = T_SE;
client.write(buf, n);
if( modemReg[REG_TELNET]>1 )
for(int k=0; k<n; k++) {Serial.print('>'); Serial.print(buf[k], HEX);}
}
}
// start over
state.cmdLen = 0;
return true;
}
else
{
// invalid state (should never happen) => just reset
state.cmdLen = 0;
}
return false;
}
int strncmpi(const char *s1, const char *s2, size_t cchars)
{
char c1, c2;
if ( s1==s2 )
return 0;
if ( s1==0 )
return -1;
if ( s2==0 )
return 1;
if ( cchars==0 )
return 0;
do {
c1 = toupper(*s1);
c2 = toupper(*s2);
s1++;
s2++;
cchars--;
} while ( (c1 != 0) && (c1 == c2) && (cchars>0) );
return (int)(c1 - c2);
}
int getConnectStatus()
{
int res;
if( modemReg[REG_LINESPEED]==0 )
{
int i = 0;
while( i<NSPEEDS && linespeeds[i]<ModemData.baud ) i++;
if( i==NSPEEDS )
modemReg[REG_CURLINESPEED] = 255;
else if( linespeeds[i]==ModemData.baud )
modemReg[REG_CURLINESPEED] = i;
else
modemReg[REG_CURLINESPEED] = i-1;
}
else if( modemReg[REG_LINESPEED] < NSPEEDS )
modemReg[REG_CURLINESPEED] = min(modemReg[REG_LINESPEED], byte(NSPEEDS-1));
if( modemExtCodes==0 )
{
res = E_CONNECT;
}
else
{
switch( modemReg[REG_CURLINESPEED] )
{
case 3: res = E_CONNECT; break;
case 4: res = E_CONNECT600; break;
case 5: res = E_CONNECT1200; break;
case 6: res = E_CONNECT2400; break;
case 7: res = E_CONNECT4800; break;
case 9: res = E_CONNECT9600; break;
default: res = E_CONNECT; break;
}
}
return res;
}
void handleModemCommand()
{
// check if a modem AT command was received
static int cmdLen = 0, prevCmdLen = 0;
static char cmd[81];
char c = 0;
if( Serial.available() )
{
c = Serial.read() & 0x7f;
if( cmdLen<80 && c>32 )
cmd[cmdLen++] = c;
else if( cmdLen>0 && c == modemReg[REG_BSP] )
cmdLen--;
if( modemEcho )
{
if( c == modemReg[REG_BSP] )
{ Serial.print(char(8)); Serial.print(' '); Serial.print(char(8)); }
else
Serial.print(c);
}
prevCharTime = millis();
}
if( cmdLen==2 && toupper(cmd[0])=='A' && cmd[1]=='/' )
{
c = modemReg[REG_CR];
cmd[1] = 'T';
cmdLen = prevCmdLen;
}
if( c == modemReg[REG_CR] )
{
while( (millis()-prevCharTime)<100 )
{
if( Serial.available() )
{
Serial.read();
break;
}
}
prevCmdLen = cmdLen;
if( cmdLen>=2 && toupper(cmd[0])=='A' && toupper(cmd[1])=='T' )
{
cmd[cmdLen]=0;
int ptr = 2;
bool connecting = false;
int status = E_OK;
while( status!=E_ERROR && ptr<cmdLen )
{
if( toupper(cmd[ptr])=='D' )
{
unsigned long t = millis();
// if we are already connected then disconnect first
if( modemClient.connected() )
{
modemClient.stop();
modemReg[REG_CURLINESPEED] = 0;
digitalWrite(DCD_PIN, HIGH);
}
ptr++;
if( toupper(cmd[ptr])=='T' || toupper(cmd[ptr])=='P' )
{
ptr++;
}
bool haveAlpha = false;
int numSep = 0;
for(int j=ptr; j<cmdLen && !haveAlpha; j++)
{
if( isalpha(cmd[j]) )
haveAlpha = true;
else if( !isdigit(cmd[j]) )
{
numSep++;
while( j<cmdLen && !isdigit(cmd[j]) ) j++;
}
}
byte n[4];
IPAddress addr;
int port = 23;
if( haveAlpha )
{
int p = ptr;
while( cmd[p]!=':' && p<cmdLen ) p++;
char c = cmd[p];
cmd[p] = 0;
if( WiFi.hostByName(cmd+ptr, addr, 5000) )
{
if( p+1<cmdLen ) port = atoi(cmd+p+1);
}
else
status = E_NOCARRIER;
cmd[p] = c;
}
else if( numSep==0 )
{
if( (cmdLen-ptr==12) || (cmdLen-ptr==16) )
{
for(int j=0; j<12; j+=3)
{
char c = cmd[ptr+j+3];
cmd[ptr+j+3] = 0;
n[j/3] = atoi(cmd+ptr+j);
cmd[ptr+j+3] = c;
}
addr = IPAddress(n);
if( cmdLen-ptr==16 ) port = atoi(cmd+ptr+12);
}
else
status = E_ERROR;
ptr = cmdLen;
}
else if( numSep==3 || numSep==4 )
{
for(int j=0; j<4; j++)
{
int p = ptr;
while( isdigit(cmd[ptr]) && ptr<cmdLen ) ptr++;
char c = cmd[ptr];
cmd[ptr] = 0;
n[j] = atoi(cmd+p);
cmd[ptr] = c;
while( !isdigit(cmd[ptr]) && ptr<cmdLen ) ptr++;
}
addr = IPAddress(n);
if( numSep==4 ) port = atoi(cmd+ptr);
}
else
status = E_ERROR;
if( status==E_OK )
{
if( modemClient.connect(addr, port) )
{
modemCommandMode = false;
modemEscapeState = 0;
resetTelnetState(modemTelnetState);
status = getConnectStatus();
connecting = true;
digitalWrite(DCD_PIN, LOW);
}
else if( modemExtCodes==0 )
status = E_NOCARRIER;
else if( WiFi.status() != WL_CONNECTED )
status = E_NODIALTONE;
else
status = E_NOANSWER;
// force at least 1 second delay between receiving
// the dial command and responding to it
if( millis()-t<1000 ) delay(1000-(millis()-t));
}
// ATD can not be followed by other commands
ptr = cmdLen;
}
else if( toupper(cmd[ptr])=='A' )
{
// force at least 1 second before responding
delay(1000);
if( server.hasClient() )
{
telnetClient = server.available();
status = getConnectStatus();
digitalWrite(DCD_PIN, LOW);
resetTelnetState(clientTelnetState);
modemCommandMode = false;
modemEscapeState=0;
}
else
status = E_NOCARRIER;
// ATA can not be followed by other commands
ptr = cmdLen;
}
else if( toupper(cmd[ptr])=='H' )
{
if( cmdLen-ptr==1 || toupper(cmd[ptr+1])=='0' )
{
// hang up
if( modemClient && modemClient.connected() )
{
modemClient.stop();
digitalWrite(DCD_PIN, HIGH);
}
if( telnetClient && telnetClient.connected() )
{
telnetClient.stop();
digitalWrite(DCD_PIN, HIGH);
}
modemReg[REG_CURLINESPEED] = 0;
}
ptr += 2;
}
else if( toupper(cmd[ptr])=='O' )
{
getCmdParam(cmd, ptr);
if( modemClient && modemClient.connected() )
{
modemCommandMode = false;
modemEscapeState = 0;
break;
}
if( telnetClient && telnetClient.connected() )
{
modemCommandMode = false;
modemEscapeState = 0;
break;
}
}
else if( toupper(cmd[ptr])=='E' )
modemEcho = getCmdParam(cmd, ptr)!=0;
else if( toupper(cmd[ptr])=='Q' )
modemQuiet = getCmdParam(cmd, ptr)!=0;
else if( toupper(cmd[ptr])=='V' )
modemVerbose = getCmdParam(cmd, ptr)!=0;
else if( toupper(cmd[ptr])=='X' )
modemExtCodes = getCmdParam(cmd, ptr);
else if( toupper(cmd[ptr])=='Z' )
{
// reset serial settings to saved value
EEPROM.get(0, ModemData);
applySerialSettings();
// reset parameters (ignore command parameter)
getCmdParam(cmd, ptr);
resetModemState();
// ATZ can not be followed by other commands
ptr = cmdLen;
}
else if( toupper(cmd[ptr])=='S' )
{
static uint8_t currentReg = 0;
int p = ptr;
int reg = getCmdParam(cmd, ptr);
if( ptr==p+1 ) reg = currentReg;
currentReg = reg;
if( cmd[ptr]=='?' )
{
ptr++;
byte v = modemReg[reg];
if( modemVerbose ) printModemCR();
if( v<100 ) Serial.print('0');
if( v<10 ) Serial.print('0');
Serial.print(v);
printModemCR();
}
else if( cmd[ptr]=='=' )
{
byte v = getCmdParam(cmd, ptr);
if( reg != REG_CURLINESPEED )
{
modemReg[reg] = v;
}
}
}
else if( toupper(cmd[ptr])=='I' )
{
byte n = getCmdParam(cmd, ptr);
if( n == 0 )
{
printModemCR();
Serial.print("WiFi Modem 1.0");
printModemCR();
Serial.print("SSID=");
Serial.print(WiFi.SSID());
printModemCR();
Serial.print("IP=");
Serial.print(WiFi.localIP());
printModemCR();
Serial.print("MAC=");
Serial.print(WiFi.macAddress());
}
else if( n == 1 || n == 5 )
{
bool showAll = (n == 5);
printModemCR();
Serial.print("AT");
Serial.print(modemEcho ? "E1" : "E0");
if( modemQuiet )
{
Serial.print("Q1");
if( showAll )
{
Serial.print(modemVerbose ? "V1" : "V0");
Serial.print(modemExtCodes ? "X1" : "X0");
}
}
else
{
Serial.print("Q0");
Serial.print(modemVerbose ? "V1" : "V0");
Serial.print(modemExtCodes ? "X1" : "X0");
}
Serial.print("S0=");
Serial.print(modemReg[0]);
if( modemReg[REG_ESC] != '+' || showAll )
{
Serial.print("S2=");
Serial.print(modemReg[REG_ESC]);
}
if( modemReg[REG_CR] != 13 || showAll )
{
Serial.print("S3=");
Serial.print(modemReg[REG_CR]);
}
if( modemReg[REG_LF] != 10 || showAll )
{
Serial.print("S4=");
Serial.print(modemReg[REG_LF]);
}
if( modemReg[REG_BSP] != 8 || showAll )
{
Serial.print("S5=");
Serial.print(modemReg[REG_BSP]);
}
if( modemReg[REG_TELNET] != 0 || showAll )
{
Serial.print("S15=");
Serial.print(modemReg[REG_TELNET]);
}
}
else if( n == 2 )
{
printModemCR();
Serial.print(WiFi.localIP());
}
else if( n == 3 )
{
printModemCR();
Serial.print(WiFi.SSID());
}
else if( n == 4 )
{
printModemCR();
Serial.print("1.0");
}
else if( n == 6 )
{
printModemCR();
Serial.print(WiFi.macAddress());
}
else
status = E_ERROR;
}
else if( toupper(cmd[ptr])=='M' || toupper(cmd[ptr])=='L' || toupper(cmd[ptr])=='P' || toupper(cmd[ptr])=='T' )
{
// ignore speaker settings, answer requests, pulse/tone dial settings
getCmdParam(cmd, ptr);
}
else if( cmd[ptr]=='&' )
{
ptr++;
if( toupper(cmd[ptr])=='W' )
{
getCmdParam(cmd, ptr);
EEPROM.put(0, ModemData);
EEPROM.commit();
}
else if( toupper(cmd[ptr])=='F')
{
ModemData.baud = 9600;
ModemData.bits = 8;
ModemData.parity = 0;
ModemData.stopbits = 1;
ModemData.silent = false;
strcpy(ModemData.telnetTerminalType, "vt100");