You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
212 lines
5.5 KiB
212 lines
5.5 KiB
// -----------------------------------------------------------------------------
|
|
// EZO™ pH Circuit from Atlas Scientific
|
|
//
|
|
// Uses SoftwareSerial library
|
|
// Copyright (C) 2018 by Rui Marinho <ruipmarinho at gmail dot com>
|
|
// -----------------------------------------------------------------------------
|
|
|
|
#if SENSOR_SUPPORT && EZOPH_SUPPORT
|
|
|
|
#pragma once
|
|
|
|
#include "Arduino.h"
|
|
#include "BaseSensor.h"
|
|
#include <SoftwareSerial.h>
|
|
|
|
class EZOPHSensor : public BaseSensor {
|
|
|
|
public:
|
|
|
|
// ---------------------------------------------------------------------
|
|
// Public
|
|
// ---------------------------------------------------------------------
|
|
|
|
EZOPHSensor(): BaseSensor() {
|
|
_count = 1;
|
|
_sensor_id = SENSOR_EZOPH_ID;
|
|
}
|
|
|
|
~EZOPHSensor() {
|
|
if (_serial) delete _serial;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------
|
|
|
|
void setRX(unsigned char pin_rx) {
|
|
if (_pin_rx == pin_rx) return;
|
|
_pin_rx = pin_rx;
|
|
_dirty = true;
|
|
}
|
|
|
|
void setTX(unsigned char pin_tx) {
|
|
if (_pin_tx == pin_tx) return;
|
|
_pin_tx = pin_tx;
|
|
_dirty = true;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------
|
|
|
|
unsigned char getRX() {
|
|
return _pin_rx;
|
|
}
|
|
|
|
unsigned char getTX() {
|
|
return _pin_tx;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------
|
|
// Sensor API
|
|
// ---------------------------------------------------------------------
|
|
|
|
// Initialization method, must be idempotent
|
|
void begin() {
|
|
if (!_dirty) return;
|
|
|
|
if (_serial) delete _serial;
|
|
|
|
_serial = new SoftwareSerial(_pin_rx, _pin_tx);
|
|
_serial->enableIntTx(false);
|
|
_serial->begin(9600);
|
|
|
|
_ready = true;
|
|
_dirty = false;
|
|
}
|
|
|
|
// Descriptive name of the sensor
|
|
String description() {
|
|
char buffer[28];
|
|
snprintf(buffer, sizeof(buffer), "EZOPH @ SwSerial(%u,%u)", _pin_rx, _pin_tx);
|
|
return String(buffer);
|
|
}
|
|
|
|
// Descriptive name of the slot # index
|
|
String slot(unsigned char index) {
|
|
return description();
|
|
};
|
|
|
|
// Address of the sensor (it could be the GPIO or I2C address)
|
|
String address(unsigned char index) {
|
|
char buffer[6];
|
|
snprintf(buffer, sizeof(buffer), "%u:%u", _pin_rx, _pin_tx);
|
|
return String(buffer);
|
|
}
|
|
|
|
// Type for slot # index
|
|
unsigned char type(unsigned char index) {
|
|
if (index == 0) return MAGNITUDE_PH;
|
|
return MAGNITUDE_NONE;
|
|
}
|
|
|
|
void tick() {
|
|
_setup();
|
|
_read();
|
|
}
|
|
|
|
// Current value for slot # index
|
|
double value(unsigned char index) {
|
|
if (index == 0) return _ph;
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
protected:
|
|
|
|
// ---------------------------------------------------------------------
|
|
// Protected
|
|
// ---------------------------------------------------------------------
|
|
|
|
void _setup() {
|
|
if (_sync_responded) {
|
|
return;
|
|
}
|
|
|
|
_error = SENSOR_ERROR_WARM_UP;
|
|
|
|
String sync_serial = "";
|
|
sync_serial.reserve(30);
|
|
|
|
if (!_sync_requested) {
|
|
_serial->write(67); // C
|
|
_serial->write(44); // ,
|
|
_serial->write(63); // ?
|
|
_serial->write(13); // \r
|
|
_serial->flush();
|
|
|
|
_sync_requested = true;
|
|
}
|
|
|
|
while ((_serial->available() > 0)) {
|
|
char sync_char = (char)_serial->read();
|
|
sync_serial += sync_char;
|
|
|
|
if (sync_char == '\r') {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (sync_serial.startsWith("?C,")) {
|
|
_sync_interval = sync_serial.substring(sync_serial.indexOf(",") + 1).toInt() * 1000;
|
|
|
|
if (_sync_interval == 0) {
|
|
_error = SENSOR_ERROR_OTHER;
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (sync_serial.startsWith("*OK")) {
|
|
_sync_responded = true;
|
|
}
|
|
|
|
if (!_sync_responded) {
|
|
return;
|
|
}
|
|
|
|
_error = SENSOR_ERROR_OK;
|
|
}
|
|
|
|
void _read() {
|
|
if (_error != SENSOR_ERROR_OK) {
|
|
return;
|
|
}
|
|
|
|
if (millis() - _ts <= _sync_interval) {
|
|
return;
|
|
}
|
|
|
|
_ts = millis();
|
|
|
|
String ph_serial = "";
|
|
ph_serial.reserve(30);
|
|
|
|
while ((_serial->available() > 0)) {
|
|
char ph_char = (char)_serial->read();
|
|
ph_serial += ph_char;
|
|
|
|
if (ph_char == '\r') {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (ph_serial == "*ER") {
|
|
_error = SENSOR_ERROR_OTHER;
|
|
return;
|
|
}
|
|
|
|
_ph = ph_serial.toFloat();
|
|
|
|
_error = SENSOR_ERROR_OK;
|
|
}
|
|
|
|
bool _sync_requested = false;
|
|
bool _sync_responded = false;
|
|
unsigned long _sync_interval = 100000; // Maximum continuous reading interval allowed is 99000 milliseconds.
|
|
unsigned long _ts = 0;
|
|
double _ph = 0;
|
|
unsigned int _pin_rx;
|
|
unsigned int _pin_tx;
|
|
SoftwareSerial * _serial = NULL;
|
|
|
|
};
|
|
|
|
#endif // SENSOR_SUPPORT && EZOPH_SUPPORT
|