Issue fixes

#475
#484

Author: Makuna

README.md

@@ -213,8 +213,8 @@ Libraries that don't rely on low-level access to AVR registers should work well.
 - [Blynk](https://github.com/blynkkk/blynk-library) - easy IoT framework for Makers (check out the [Kickstarter page](http://tiny.cc/blynk-kick)).
 - [DallasTemperature](https://github.com/milesburton/Arduino-Temperature-Control-Library.git)
 - [DHT11](https://github.com/adafruit/DHT-sensor-library) - Download latest v1.1.0 library and no changes are necessary.  Older versions should initialize DHT as follows: ```DHT dht(DHTPIN, DHTTYPE, 15);```
-- [NeoPixel](https://github.com/adafruit/Adafruit_NeoPixel) - Adafruit's NeoPixel libray, now with support for the ESP8266 (use version 1.0.2 or higher from Arduino's library manager).
-- [NeoPixelBus](https://github.com/Makuna/NeoPixelBus) - Arduino NeoPixel library compatible with esp8266.
+- [NeoPixel](https://github.com/adafruit/Adafruit_NeoPixel) - Adafruit's NeoPixel library, now with support for the ESP8266 (use version 1.0.2 or higher from Arduino's library manager).
+- [NeoPixelBus](https://github.com/Makuna/NeoPixelBus) - Arduino NeoPixel library compatible with esp8266. Use the "NeoPixelAnimator" branch for esp8266 to get HSL color support and more.
 - [PubSubClient](https://github.com/Imroy/pubsubclient) MQTT library by @Imroy.
 - [RTC](https://github.com/Makuna/Rtc) - Arduino Library for Ds1307 & Ds3231 compatible with esp8266.
 - [Souliss, Smart Home](https://github.com/souliss/souliss) - Framework for Smart Home based on Arduino, Android and openHAB.

hardware/esp8266com/esp8266/cores/esp8266/core_esp8266_noniso.c

@@ -149,49 +149,58 @@ char* ultoa(unsigned long value, char* result, int base) {
 
 char * dtostrf(double number, signed char width, unsigned char prec, char *s) {
 
-    if(isnan(number)) {
+    if (isnan(number)) {
         strcpy(s, "nan");
         return s;
     }
-    if(isinf(number)) {
+    if (isinf(number)) {
         strcpy(s, "inf");
         return s;
     }
 
-    if(number > 4294967040.0 || number < -4294967040.0) {
+    if (number > 4294967040.0 || number < -4294967040.0) {
         strcpy(s, "ovf");
         return s;
     }
+
     char* out = s;
+    int signInt_Part = 1;
+
     // Handle negative numbers
-    if(number < 0.0) {
-        *out = '-';
-        ++out;
+    if (number < 0.0) {
+        signInt_Part = -1;
         number = -number;
     }
 
+    // calc left over digits 
+    if (prec > 0)
+    {
+        width -= (prec + 1);
+    }
+
     // Round correctly so that print(1.999, 2) prints as "2.00"
     double rounding = 0.5;
-    for(uint8_t i = 0; i < prec; ++i)
+    for (uint8_t i = 0; i < prec; ++i)
         rounding /= 10.0;
 
     number += rounding;
 
     // Extract the integer part of the number and print it
-    unsigned long int_part = (unsigned long) number;
-    double remainder = number - (double) int_part;
-    out += sprintf(out, "%ld", int_part);
+    unsigned long int_part = (unsigned long)number;
+    double remainder = number - (double)int_part;
+    out += sprintf(out, "%*ld", width, int_part * signInt_Part);
 
     // Print the decimal point, but only if there are digits beyond
-    if(prec > 0) {
+    if (prec > 0) {
         *out = '.';
         ++out;
-    }
 
-    for (unsigned char decShift = prec; decShift > 0; decShift--) {
-        remainder *= 10.0;
+
+        for (unsigned char decShift = prec; decShift > 0; decShift--) {
+            remainder *= 10.0;
+        }
+        sprintf(out, "%0*d", prec, (int)remainder);
     }
-    sprintf(out, "%0*d", prec, (int)remainder);
 
     return s;
 }

hardware/esp8266com/esp8266/cores/esp8266/pgmspace.cpp

@@ -135,6 +135,17 @@ int printf_P(const char* formatP, ...) {
     return ret;
 }
 
+int sprintf_P(char* str, const char* formatP, ...) {
+    int ret;
+    va_list arglist;
+    va_start(arglist, formatP);
+
+    ret = vsnprintf_P(str, SIZE_IRRELEVANT, formatP, arglist);
+
+    va_end(arglist);
+    return ret;
+}
+
 int snprintf_P(char* str, size_t strSize, const char* formatP, ...) {
     int ret;
     va_list arglist;

hardware/esp8266com/esp8266/cores/esp8266/pgmspace.h

@@ -50,7 +50,8 @@ size_t strnlen_P(const char *s, size_t size);
 #define strlen_P(strP)          strnlen_P((strP), SIZE_IRRELEVANT)
 
 int	printf_P(const char *formatP, ...) __attribute__ ((format (printf, 1, 2)));
-int	snprintf_P(char *str, size_t strSize, const char *formatP, ...) __attribute__ ((format (printf, 3, 4)));
+int	sprintf_P(char *str, const char *formatP, ...) __attribute__((format(printf, 2, 3)));
+int	snprintf_P(char *str, size_t strSize, const char *formatP, ...) __attribute__((format(printf, 3, 4)));
 int	vsnprintf_P(char *str, size_t strSize, const char *formatP, va_list ap) __attribute__ ((format (printf, 3, 0)));
 
 // flash memory must be read using 32 bit aligned addresses else a processor