94 lines
4.2 KiB
C
94 lines
4.2 KiB
C
|
//******************************************************************************************
|
||
|
|
// File: PS_HX711.h
|
||
|
|
// Authors: Malcolm Dobson + Tim OCallaghan (Based on original programming by Dan G Ogorchock & Daniel J Ogorchock (Father and Son) )
|
||
|
|
//
|
||
|
|
// Summary: PS_HX711 is a class which implements only the SmartThings "Sensor" device capability.
|
||
|
|
// It inherits from the st::PollingSensor class. The current version is made to be used as a framework
|
||
|
|
// for more complicated programming
|
||
|
|
//
|
||
|
|
// Create an instance of this class in your sketch's global variable section
|
||
|
|
// For Example: st::PS_HX711 sensor1(F("weight1"), 120, 0);
|
||
|
|
//
|
||
|
|
// st::PS_HX711() constructor requires the following arguments
|
||
|
|
// - String &name - REQUIRED - the name of the object - must match the Groovy ST_Anything DeviceType tile name
|
||
|
|
// - long interval - REQUIRED - the polling interval in seconds
|
||
|
|
// - long offset - REQUIRED - the polling interval offset in seconds - used to prevent all polling sensors from executing at the same time
|
||
|
|
//
|
||
|
|
// This class supports receiving configuration data from the SmartThings cloud via the ST App. A user preference
|
||
|
|
// can be configured in your phone's ST App, and then the "Configure" tile will send the data for all sensors to
|
||
|
|
// the ST Shield. For PollingSensors, this data is handled in the beSMart() function.
|
||
|
|
//
|
||
|
|
// TODO: Determine a method to persist the ST Cloud's Polling Interval data
|
||
|
|
//
|
||
|
|
// Change History:
|
||
|
|
//
|
||
|
|
// Date Who What
|
||
|
|
// ---- --- ----
|
||
|
|
// 2015-01-03 Dan & Daniel Original Creation
|
||
|
|
// 2017-08-30 Dan Ogorchock Modified comment section above to comply with new Parent/Child Device Handler requirements
|
||
|
|
// 2017-10-20 Allan (vseven) Modified original PS_Illuminance library for use with a generic sensor
|
||
|
|
// 2017-12-28 Dan Ogorchock Fixed bug with improper init() definition
|
||
|
|
// 2021-01-19 Malcolm Dobson Redone to support HX711 weight sensor
|
||
|
|
// 2021-01-23 Tim OCallaghan Pass pins on constructor and add storing of calibration factor in EEPROM and don't tare in init
|
||
|
|
// 2021-01-24 Malcolm Dobson Save the offset also in eeprom and then read and set in init
|
||
|
|
// 2022-02-08 Dan Ogorchock Minor comments clean up
|
||
|
|
//
|
||
|
|
//
|
||
|
|
//******************************************************************************************
|
||
|
|
|
||
|
|
#include "PollingSensor.h"
|
||
|
|
#include <HX711.h>
|
||
|
|
|
||
|
|
namespace st
|
||
|
|
{
|
||
|
|
class PS_HX711: public PollingSensor
|
||
|
|
{
|
||
|
|
private:
|
||
|
|
char m_nSensorValue; //converted to a string so all data can be passed in one call
|
||
|
|
HX711 scale;
|
||
|
|
int calibration_factor = -16900; // Defines factor we'll use for calibrating.
|
||
|
|
int calibration_offset = 0; // Defines zero offset we'll use for calibrating.
|
||
|
|
int lastValue = -1;
|
||
|
|
byte m_n_dout_pin; //esp pin for hx711 dout
|
||
|
|
byte m_n_clk_pin; //esp pin for hx711 clk
|
||
|
|
public:
|
||
|
|
//constructor - called in your sketch's global variable declaration section
|
||
|
|
//this can be modified to accepting more varialbes into it by modifying the
|
||
|
|
//line. For example if you wanted to assign a pin or a variable you could add
|
||
|
|
//a ", int myVariable" after the offset below and then use that within your program.
|
||
|
|
//you would need to also update the associated line in the .cpp file.
|
||
|
|
PS_HX711(const __FlashStringHelper *name, byte dout_pin, byte clk_pin, unsigned int interval, int offset);
|
||
|
|
|
||
|
|
//destructor
|
||
|
|
virtual ~PS_HX711();
|
||
|
|
|
||
|
|
//SmartThings Shield data handler (receives configuration data from ST - polling interval, and adjusts on the fly)
|
||
|
|
virtual void beSmart(const String &str);
|
||
|
|
|
||
|
|
//initialization routine
|
||
|
|
virtual void init();
|
||
|
|
|
||
|
|
//calibrate scale
|
||
|
|
void calibrate(const float weight);
|
||
|
|
|
||
|
|
//reset scale to zero
|
||
|
|
void tare();
|
||
|
|
|
||
|
|
//update device, so next read will publish a new value
|
||
|
|
inline void updated() {lastValue = -1;}
|
||
|
|
|
||
|
|
void WriteEEPROM(int address, int value);
|
||
|
|
|
||
|
|
//function to get data from sensor and queue results for transfer to ST Cloud
|
||
|
|
virtual void getData();
|
||
|
|
|
||
|
|
//gets
|
||
|
|
inline byte getSensorValue() const {return m_nSensorValue;}
|
||
|
|
|
||
|
|
//sets
|
||
|
|
// set a calibration factor so the scale report accurate weight
|
||
|
|
void setCalibration(const int factor) {calibration_factor = factor;}
|
||
|
|
inline void clearLastValue() {lastValue = -1;}
|
||
|
|
};
|
||
|
|
}
|