ESPHome 2025.5.0
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max31865.h
Go to the documentation of this file.
1#pragma once
2
6
7namespace esphome {
8namespace max31865 {
9
25
27 public PollingComponent,
28 public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_LOW,
29 spi::CLOCK_PHASE_TRAILING, spi::DATA_RATE_4MHZ> {
30 public:
31 void set_reference_resistance(float reference_resistance) { reference_resistance_ = reference_resistance; }
32 void set_nominal_resistance(float nominal_resistance) { rtd_nominal_resistance_ = nominal_resistance; }
33 void set_filter(MAX31865ConfigFilter filter) { filter_ = filter; }
34 void set_num_rtd_wires(uint8_t rtd_wires) { rtd_wires_ = rtd_wires; }
35 void setup() override;
36 void dump_config() override;
37 float get_setup_priority() const override;
38
39 void update() override;
40
41 protected:
45 uint8_t rtd_wires_;
46 uint8_t base_config_;
47 bool has_fault_ = false;
48 bool has_warn_ = false;
49 void read_data_();
50 void write_config_(uint8_t mask, uint8_t bits, uint8_t start_position = 0);
51 void write_register_(uint8_t reg, uint8_t value);
52 uint8_t read_register_(uint8_t reg);
53 uint16_t read_register_16_(uint8_t reg);
54 float calc_temperature_(float rtd_ratio);
55};
56
57} // namespace max31865
58} // namespace esphome
This class simplifies creating components that periodically check a state.
Definition component.h:301
uint8_t read_register_(uint8_t reg)
Definition max31865.cpp:171
void write_register_(uint8_t reg, uint8_t value)
Definition max31865.cpp:163
void set_reference_resistance(float reference_resistance)
Definition max31865.h:31
uint16_t read_register_16_(uint8_t reg)
Definition max31865.cpp:180
float get_setup_priority() const override
Definition max31865.cpp:92
void write_config_(uint8_t mask, uint8_t bits, uint8_t start_position=0)
Definition max31865.cpp:154
MAX31865ConfigFilter filter_
Definition max31865.h:44
float calc_temperature_(float rtd_ratio)
Definition max31865.cpp:191
void set_nominal_resistance(float nominal_resistance)
Definition max31865.h:32
void set_num_rtd_wires(uint8_t rtd_wires)
Definition max31865.h:34
void set_filter(MAX31865ConfigFilter filter)
Definition max31865.h:33
Base-class for all sensors.
Definition sensor.h:57
The SPIDevice is what components using the SPI will create.
Definition spi.h:421
@ FAULT_THRESHOLD_L_LSB_REG
Definition max31865.h:18
@ FAULT_THRESHOLD_H_MSB_REG
Definition max31865.h:15
@ FAULT_THRESHOLD_L_MSB_REG
Definition max31865.h:17
@ FAULT_THRESHOLD_H_LSB_REG
Definition max31865.h:16
Providing packet encoding functions for exchanging data with a remote host.
Definition a01nyub.cpp:7