WiFiThermostat/src/WiFiThermostat/logging.ino

void sendLog(const char *msg, uint8_t loglevel)
{
    char buf[101];
    char buf2[121];
    static char tbuf[20];
    bool timeIsValid=false;
    strlcpy(buf, msg, sizeof(buf));

    if (confTime.ntpEnable)
    {
        updateTime();
        if(lt.tm_year > 70) { // lt.tm_year = years since 1900, before NTP is synced = 70
            //strftime(tbuf, sizeof(tbuf), "%Y-%m-%d %H:%M:%S", &lt);
            strftime(tbuf, sizeof(tbuf), "%H:%M:%S", &lt);
            sprintf(buf2, "[%s] %s\r\n", tbuf, buf);
            timeIsValid = true;
        }
    }

    if(!timeIsValid)
    {
        //unsigned long tmpMillis;
        unsigned long tmpSecs;
        //unsigned int restMillis;
        //tmpMillis = millis();
        //tmpSecs = tmpMillis / 1000;
        //restMillis = tmpMillis - (tmpSecs * 1000);
        tmpSecs = millis() / 1000;
        
        //sprintf(buf2, "[%u.%u] %s\r\n", tmpSecs, restMillis, buf);
        sprintf(buf2, "[%07lu] %s\r\n", tmpSecs, buf);
    }

    if(loglevel <= confLog.logLevelSerial) Serial.print(buf2);

    if (confMqtt.mqtt_enable && mqttclient.state() == 0)
    {
        if(loglevel <= confLog.logLevelMqtt) mqttclient.publish(confMqtt.mqtt_topic_out, buf, confMqtt.mqtt_outRetain);
    }
    yield();

    if (confWeb.enableConsole && webSocket.connectedClients() > 0)
    {
        if(loglevel <= confLog.logLevelWeb) webSocket.broadcastTXT(buf2);
    }
}

void sendLog(const __FlashStringHelper *msg, uint8_t loglevel)
{
    char buf[501];
    PGM_P p = reinterpret_cast<PGM_P>(msg);
    size_t n = 0;
    while (1)
    {
        unsigned char c = pgm_read_byte(p++);
        if (c == 0) {
            buf[n] = c;
            break;
        }
        else if (n >= sizeof(buf)-1) {
            break;
        }
        else {
            buf[n] = c;
            n++;
        }
    }
    sendLog(buf, loglevel);
}