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#include <Arduino.h>
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#include "HX711.h"
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#include "soc/rtc.h"
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// HX711 circuit wiring
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const int LOADCELL_DOUT_PIN = 16;
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const int LOADCELL_SCK_PIN = 4;
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HX711 scale;
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void setup() {
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Serial.begin(115200);
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rtc_cpu_freq_config_t config;
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rtc_clk_cpu_freq_get_config(&config);
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rtc_clk_cpu_freq_mhz_to_config(RTC_XTAL_FREQ_40M, &config);
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rtc_clk_cpu_freq_set_config_fast(&config);
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Serial.println("HX711 Demo");
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Serial.println("Initializing the scale");
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scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
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Serial.println("Before setting up the scale:");
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Serial.print("read: \t\t");
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Serial.println(scale.read()); // print a raw reading from the ADC
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Serial.print("read average: \t\t");
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Serial.println(scale.read_average(20)); // print the average of 20 readings from the ADC
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Serial.print("get value: \t\t");
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Serial.println(scale.get_value(5)); // print the average of 5 readings from the ADC minus the tare weight (not set yet)
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Serial.print("get units: \t\t");
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Serial.println(scale.get_units(5), 1); // print the average of 5 readings from the ADC minus tare weight (not set) divided
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// by the SCALE parameter (not set yet)
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scale.set_scale(388.9); // this value is obtained by calibrating the scale with known weights; see the README for details
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scale.tare(); // reset the scale to 0
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Serial.println("After setting up the scale:");
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Serial.print("read: \t\t");
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Serial.println(scale.read()); // print a raw reading from the ADC
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Serial.print("read average: \t\t");
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Serial.println(scale.read_average(20)); // print the average of 20 readings from the ADC
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Serial.print("get value: \t\t");
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Serial.println(scale.get_value(5)); // print the average of 5 readings from the ADC minus the tare weight, set with tare()
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Serial.print("get units: \t\t");
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Serial.println(scale.get_units(5), 1); // print the average of 5 readings from the ADC minus tare weight, divided
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// by the SCALE parameter set with set_scale
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Serial.println("Readings:");
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}
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void loop() {
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Serial.print("one reading:\t");
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Serial.print(scale.get_units(), 1);
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Serial.print("\t| average:\t");
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Serial.println(scale.get_units(10), 5);
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scale.power_down(); // put the ADC in sleep mode
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delay(5000);
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scale.power_up();
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}
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