bool EspDrv::wifiConnect(char* ssid, const char *passphrase)
{
LOGDEBUG(F("> wifiConnect"));
// TODO
// Escape character syntax is needed if "SSID" or "password" contains
// any special characters (',', '"' and '/')
// connect to access point
int ret = sendCmd(F("AT+CWJAP_CUR=\"%s\",\"%s\""), 20000, ssid, passphrase);
if (ret==TAG_OK)
{
LOGINFO1(F("Connected to"), ssid);
return true;
}
LOGWARN1(F("Failed to connected to"), ssid);
// clean additional messages logged after the FAIL tag
delay(1000);
espEmptyBuf(false);
return false;
}
void EspDrv::reset()
{
LOGDEBUG(F("> reset"));
sendCmd(F("AT+RST"));
delay(3000);
espEmptyBuf(false); // empty dirty characters from the buffer
// disable echo of commands
sendCmd(F("ATE0"));
// set station mode
sendCmd(F("AT+CWMODE=1"));
// set multiple connections mode
sendCmd(F("AT+CIPMUX=1"));
// Show remote IP and port with "+IPD"
sendCmd(F("AT+CIPDINFO=1"));
// Disable autoconnect
// Automatic connection can create problems during initialization phase at next boot
sendCmd(F("AT+CWAUTOCONN=0"));
// enable DHCP
sendCmd(F("AT+CWDHCP=1,1"));
}
/*
* Sends the AT command and stops if any of the TAGS is found.
* Extract the string enclosed in the passed tags and returns it in the outStr buffer.
* Returns true if the string is extracted, false if tags are not found of timed out.
*/
bool EspDrv::sendCmdGet(const __FlashStringHelper* cmd, const char* startTag, const char* endTag, char* outStr, int outStrLen)
{
int idx;
bool ret = false;
outStr[0] = 0;
espEmptyBuf();
LOGDEBUG(F("----------------------------------------------"));
LOGDEBUG1(F(">>"), cmd);
// send AT command to ESP
espSerial->println(cmd);
// read result until the startTag is found
idx = readUntil(1000, startTag);
if(idx==NUMESPTAGS)
{
// clean the buffer to get a clean string
ringBuf.init();
// start tag found, search the endTag
idx = readUntil(500, endTag);
if(idx==NUMESPTAGS)
{
// end tag found
// copy result to output buffer avoiding overflow
ringBuf.getStrN(outStr, strlen(endTag), outStrLen-1);
// read the remaining part of the response
readUntil(2000);
ret = true;
}
else
{
LOGWARN(F("End tag not found"));
}
}
else if(idx>=0 and idx<NUMESPTAGS)
{
// the command has returned but no start tag is found
LOGDEBUG1(F("No start tag found:"), idx);
}
else
{
// the command has returned but no tag is found
LOGWARN(F("No tag found"));
}
LOGDEBUG1(F("---------------------------------------------- >"), outStr);
LOGDEBUG();
return ret;
}
uint8_t EspDrv::getScanNetworks()
{
uint8_t ssidListNum = 0;
int idx;
bool ret = false;
espEmptyBuf();
LOGDEBUG(F("----------------------------------------------"));
LOGDEBUG(F(">> AT+CWLAP"));
espSerial->println(F("AT+CWLAP"));
char buf[100];
idx = readUntil(10000, "+CWLAP:(");
while (idx == NUMESPTAGS)
{
_networkEncr[ssidListNum] = espSerial->parseInt();
//LOGDEBUG1("enc:", _networkEncr[ssidListNum]);
// discard , and " characters
readUntil(1000, "\"");
idx = readUntil(1000, "\"", false);
if(idx==NUMESPTAGS)
{
ringBuf.getStr(_networkSsid[ssidListNum], 1); // 1 = strlen ("\"")
}
//LOGDEBUG1("ssid:", _networkSsid[ssidListNum]);
// discard , character
readUntil(1000, ",");
_networkRssi[ssidListNum] = espSerial->parseInt();
//LOGDEBUG1("rssi:", _networkRssi[ssidListNum]);
idx = readUntil(1000, "+CWLAP:(");
if(ssidListNum==WL_NETWORKS_LIST_MAXNUM-1)
break;
ssidListNum++;
}
if (idx==-1)
return -1;
LOGDEBUG1(F("---------------------------------------------- >"), ssidListNum);
LOGDEBUG();
return ssidListNum;
}
int8_t EspDrv::disconnect()
{
LOGDEBUG(F("> disconnect"));
if(sendCmd(F("AT+CWQAP"))==TAG_OK)
return WL_DISCONNECTED;
// wait and clear any additional message
delay(2000);
espEmptyBuf(false);
return WL_DISCONNECTED;
}
/*
* Sends the AT command and returns the id of the TAG.
* Return -1 if no tag is found.
*/
int EspDrv::sendCmd(const __FlashStringHelper* cmd, int timeout)
{
espEmptyBuf();
LOGDEBUG(F("----------------------------------------------"));
LOGDEBUG1(F(">>"), cmd);
espSerial->println(cmd);
int idx = readUntil(timeout);
LOGDEBUG1(F("---------------------------------------------- >"), idx);
LOGDEBUG();
return idx;
}
void EspDrv::reset()
{
LOGDEBUG(F("> reset"));
sendCmd(F("AT+RST"));
delay(3000);
espEmptyBuf(false); // empty dirty characters from the buffer
// disable echo of commands
sendCmd(F("ATE0"));
// set station mode
sendCmd(F("AT+CWMODE=1"));
// set multiple connections mode
sendCmd(F("AT+CIPMUX=1"));
// enable DHCP
sendCmd(F("AT+CWDHCP=1,1"));
}
/*
* Sends the AT command and returns the id of the TAG.
* The additional arguments are formatted into the command using sprintf.
* Return -1 if no tag is found.
*/
int EspDrv::sendCmd(const __FlashStringHelper* cmd, int timeout, ...)
{
char cmdBuf[CMD_BUFFER_SIZE];
va_list args;
va_start (args, timeout);
vsnprintf_P (cmdBuf, CMD_BUFFER_SIZE, (char*)cmd, args);
va_end (args);
espEmptyBuf();
LOGDEBUG(F("----------------------------------------------"));
LOGDEBUG1(F(">>"), cmdBuf);
espSerial->println(cmdBuf);
int idx = readUntil(timeout);
LOGDEBUG1(F("---------------------------------------------- >"), idx);
LOGDEBUG();
return idx;
}