1+ /* !
2+ * @file drvD6t1a.h
3+ *
4+ * Device driver for the OMRON D6T-1A Non-contact Thermal sensor.
5+ *
6+ * Adafruit invests time and resources providing this open source code,
7+ * please support Adafruit and open-source hardware by purchasing
8+ * products from Adafruit!
9+ *
10+ * Copyright (c) Tyeth Gundry 2025 for Adafruit Industries.
11+ *
12+ * MIT license, all text here must be included in any redistribution.
13+ *
14+ */
15+
16+ #ifndef DRV_D6T1A_H
17+ #define DRV_D6T1A_H
18+ #include " drvBase.h"
19+ #include < OmronD6T.h>
20+
21+ /* !
22+ @brief Class that provides a sensor driver for the D6T1A temperature sensor.
23+ */
24+ class drvD6t1a : public drvBase {
25+
26+ public:
27+ /* !
28+ @brief Constructor for a D6T1A sensor.
29+ @param i2c
30+ The I2C interface.
31+ @param sensorAddress
32+ 7-bit device address.
33+ @param mux_channel
34+ The I2C multiplexer channel.
35+ @param driver_name
36+ The name of the driver.
37+ */
38+ drvD6t1a (TwoWire *i2c, uint16_t sensorAddress, uint32_t mux_channel,
39+ const char *driver_name)
40+ : drvBase(i2c, sensorAddress, mux_channel, driver_name) {
41+ _i2c = i2c;
42+ _address = sensorAddress;
43+ _i2c_mux_channel = mux_channel;
44+ strncpy (_name, driver_name, sizeof (_name) - 1 );
45+ _name[sizeof (_name) - 1 ] = ' \0 '
46+ _deviceTemp = NAN;
47+ _objectTemp = NAN;
48+ _lastRead = 0 ;
49+ _d6t1a = nullptr ;
50+ }
51+
52+ /* !
53+ @brief Destructor for a D6T1A sensor.
54+ */
55+ ~drvD6t1a () { delete _d6t1a; }
56+
57+ /* !
58+ @brief Initializes the D6T1A sensor and begins I2C.
59+ @returns True if initialized successfully, False otherwise.
60+ */
61+ bool begin () override {
62+ _d6t1a = new OmronD6T (OmronD6T::D6T_1A, _i2c);
63+ if (!_d6t1a->begin (_address))
64+ return false ;
65+ return true ;
66+ }
67+
68+ /* !
69+ @brief Checks if sensor was read within last 200ms.
70+ @returns True if the sensor was recently read, False otherwise.
71+ */
72+ bool HasBeenReadInLast200ms () {
73+ return _lastRead != 0 && (millis () - _lastRead < 200 );
74+ }
75+
76+ /* !
77+ @brief Reads the sensor.
78+ @returns True if the sensor was read successfully, False otherwise.
79+ */
80+ bool ReadSensorData () {
81+ if (HasBeenReadInLast200ms ())
82+ return true ;
83+
84+ _d6t1a->read ();
85+ _deviceTemp = (float )_d6t1a->ambientTempC ();
86+ _objectTemp = (float )_d6t1a->objectTempC (0 , 0 );
87+ _lastRead = millis ();
88+ return true ;
89+ }
90+
91+ /* !
92+ @brief Gets the D6T1A's current ambient temperature.
93+ @param tempEvent
94+ Pointer to an Adafruit_Sensor event.
95+ @returns True if the temperature was obtained successfully, False otherwise.
96+ */
97+ bool getEventAmbientTemp (sensors_event_t *tempEvent) {
98+ if (ReadSensorData () && !isnan (_deviceTemp)) {
99+ tempEvent->temperature = _deviceTemp;
100+ return true ;
101+ }
102+ return false ;
103+ }
104+
105+ /* !
106+ @brief Gets the D6T1A's object temperature.
107+ @param tempEvent
108+ Pointer to an Adafruit_Sensor event.
109+ @returns True if the temperature was obtained successfully, False otherwise.
110+ */
111+ bool getEventObjectTemp (sensors_event_t *tempEvent) {
112+ if (ReadSensorData () && !isnan (_objectTemp)) {
113+ tempEvent->temperature = _objectTemp;
114+ return true ;
115+ }
116+ return false ;
117+ }
118+
119+ void ConfigureDefaultSensorTypes () override {
120+ _default_sensor_types_count = 2 ;
121+ _default_sensor_types[0 ] =
122+ wippersnapper_sensor_SensorType_SENSOR_TYPE_AMBIENT_TEMPERATURE;
123+ _default_sensor_types[1 ] =
124+ wippersnapper_sensor_SensorType_SENSOR_TYPE_OBJECT_TEMPERATURE;
125+ }
126+
127+ protected:
128+ float _deviceTemp; // /< Device temperature in Celsius
129+ float _objectTemp; // /< Object temperature in Celsius
130+ uint32_t _lastRead; // /< Last time the sensor was read in milliseconds
131+ OmronD6T *_d6t1a; // /< D6T1A object
132+ };
133+
134+ #endif // DRV_D6T1A_H
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