more stability for ESP8266

HX711.cpp

@@ -1,14 +1,18 @@
 #include <Arduino.h>
 #include <HX711.h>
 
-#if ARDUINO_VERSION <= 106
+#ifndef ESP8266
+	#if ARDUINO_VERSION <= 106 
     // "yield" is not implemented as noop in older Arduino Core releases, so let's define it.
     // See also: https://stackoverflow.com/questions/34497758/what-is-the-secret-of-the-arduino-yieldfunction/34498165#34498165
-    void yield(void) {};
+   	void yield(void) {};
+	#endif
 #endif
 
 HX711::HX711(byte dout, byte pd_sck, byte gain) {
+	#ifndef ESP8266
 	begin(dout, pd_sck, gain);
+	#endif
 }
 
 HX711::HX711() {

examples/HX711ESP8266/HX711ESP8266.ino

@@ -0,0 +1,58 @@
+#include "HX711.h"
+
+// HX711.DOUT	- pin #D2
+// HX711.PD_SCK	- pin #D3
+
+HX711 scale(D2, D3);		// parameter "gain" is ommited; the default value 128 is used by the library
+
+void setup() {
+  Serial.begin(38400);
+  // usually the begin method is called by the class builder but in case of esp8266 must be called explicitly in the setup
+  scale.begin(D2,D3); //esp specific statment 
+  Serial.println("HX711 Demo");
+
+  Serial.println("Before setting up the scale:");
+  Serial.print("read: \t\t");
+  Serial.println(scale.read());			// print a raw reading from the ADC
+
+  Serial.print("read average: \t\t");
+  Serial.println(scale.read_average(20));  	// print the average of 20 readings from the ADC
+
+  Serial.print("get value: \t\t");
+  Serial.println(scale.get_value(5));		// print the average of 5 readings from the ADC minus the tare weight (not set yet)
+
+  Serial.print("get units: \t\t");
+  Serial.println(scale.get_units(5), 1);	// print the average of 5 readings from the ADC minus tare weight (not set) divided 
+						// by the SCALE parameter (not set yet)  
+
+  scale.set_scale(2280.f);                      // this value is obtained by calibrating the scale with known weights; see the README for details
+  scale.tare();				        // reset the scale to 0
+
+  Serial.println("After setting up the scale:");
+
+  Serial.print("read: \t\t");
+  Serial.println(scale.read());                 // print a raw reading from the ADC
+
+  Serial.print("read average: \t\t");
+  Serial.println(scale.read_average(20));       // print the average of 20 readings from the ADC
+
+  Serial.print("get value: \t\t");
+  Serial.println(scale.get_value(5));		// print the average of 5 readings from the ADC minus the tare weight, set with tare()
+
+  Serial.print("get units: \t\t");
+  Serial.println(scale.get_units(5), 1);        // print the average of 5 readings from the ADC minus tare weight, divided 
+						// by the SCALE parameter set with set_scale
+
+  Serial.println("Readings:");
+}
+
+void loop() {
+  Serial.print("one reading:\t");
+  Serial.print(scale.get_units(), 1);
+  Serial.print("\t| average:\t");
+  Serial.println(scale.get_units(10), 1);
+
+  scale.power_down();			        // put the ADC in sleep mode
+  delay(5000);
+  scale.power_up();
+}

keywords.txt

@@ -0,0 +1,30 @@
+#######################################
+# HX711
+#######################################
+
+#######################################
+# Datatypes (KEYWORD1)
+#######################################
+
+HX711	KEYWORD1
+
+#######################################
+# Methods and Functions (KEYWORD2)
+#######################################
+
+is_ready	KEYWORD2
+set_gain	KEYWORD2
+read_average	KEYWORD2
+get_value	KEYWORD2
+get_units	KEYWORD2
+tare	KEYWORD2
+set_scale	KEYWORD2
+get_scale	KEYWORD2
+set_offset	KEYWORD2
+get_offset	KEYWORD2
+power_down	KEYWORD2
+power_up	KEYWORD2
+
+#######################################
+# Constants (LITERAL1)
+#######################################