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Add TC74 temperature sensor (#7460)
Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
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11 changed files with 178 additions and 0 deletions
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@ -403,6 +403,7 @@ esphome/components/sun/* @OttoWinter
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esphome/components/sun_gtil2/* @Mat931
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esphome/components/switch/* @esphome/core
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esphome/components/t6615/* @tylermenezes
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esphome/components/tc74/* @sethgirvan
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esphome/components/tca9548a/* @andreashergert1984
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esphome/components/tca9555/* @mobrembski
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esphome/components/tcl112/* @glmnet
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1
esphome/components/tc74/__init__.py
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1
esphome/components/tc74/__init__.py
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CODEOWNERS = ["@sethgirvan"]
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32
esphome/components/tc74/sensor.py
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32
esphome/components/tc74/sensor.py
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import esphome.codegen as cg
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from esphome.components import i2c, sensor
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import esphome.config_validation as cv
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from esphome.const import (
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DEVICE_CLASS_TEMPERATURE,
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STATE_CLASS_MEASUREMENT,
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UNIT_CELSIUS,
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)
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CODEOWNERS = ["@sethgirvan"]
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DEPENDENCIES = ["i2c"]
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tc74_ns = cg.esphome_ns.namespace("tc74")
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TC74Component = tc74_ns.class_("TC74Component", cg.PollingComponent, i2c.I2CDevice)
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CONFIG_SCHEMA = (
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sensor.sensor_schema(
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TC74Component,
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unit_of_measurement=UNIT_CELSIUS,
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accuracy_decimals=1,
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device_class=DEVICE_CLASS_TEMPERATURE,
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state_class=STATE_CLASS_MEASUREMENT,
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)
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.extend(cv.polling_component_schema("60s"))
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.extend(i2c.i2c_device_schema(0x48))
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)
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async def to_code(config):
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var = await sensor.new_sensor(config)
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await cg.register_component(var, config)
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await i2c.register_i2c_device(var, config)
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68
esphome/components/tc74/tc74.cpp
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68
esphome/components/tc74/tc74.cpp
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// Based on the TC74 datasheet https://ww1.microchip.com/downloads/en/DeviceDoc/21462D.pdf
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#include "tc74.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace tc74 {
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static const char *const TAG = "tc74";
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static const uint8_t TC74_REGISTER_TEMPERATURE = 0x00;
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static const uint8_t TC74_REGISTER_CONFIGURATION = 0x01;
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static const uint8_t TC74_DATA_READY_MASK = 0x40;
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// It is possible the "Data Ready" bit will not be set if the TC74 has not been powered on for at least 250ms, so it not
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// being set does not constitute a failure.
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void TC74Component::setup() {
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ESP_LOGCONFIG(TAG, "Setting up TC74...");
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uint8_t config_reg;
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if (this->read_register(TC74_REGISTER_CONFIGURATION, &config_reg, 1) != i2c::ERROR_OK) {
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this->mark_failed();
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return;
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}
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this->data_ready_ = config_reg & TC74_DATA_READY_MASK;
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}
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void TC74Component::update() { this->read_temperature_(); }
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void TC74Component::dump_config() {
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LOG_SENSOR("", "TC74", this);
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LOG_I2C_DEVICE(this);
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if (this->is_failed()) {
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ESP_LOGE(TAG, "Connection with TC74 failed!");
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}
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LOG_UPDATE_INTERVAL(this);
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}
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void TC74Component::read_temperature_() {
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if (!this->data_ready_) {
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uint8_t config_reg;
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if (this->read_register(TC74_REGISTER_CONFIGURATION, &config_reg, 1) != i2c::ERROR_OK) {
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this->status_set_warning();
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return;
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}
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if (config_reg & TC74_DATA_READY_MASK) {
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this->data_ready_ = true;
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} else {
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ESP_LOGD(TAG, "TC74 not ready");
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return;
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}
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}
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uint8_t temperature_reg;
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if (this->read_register(TC74_REGISTER_TEMPERATURE, &temperature_reg, 1) != i2c::ERROR_OK) {
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this->status_set_warning();
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return;
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}
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ESP_LOGD(TAG, "Got Temperature=%d °C", temperature_reg);
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this->publish_state(temperature_reg);
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this->status_clear_warning();
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}
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float TC74Component::get_setup_priority() const { return setup_priority::DATA; }
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} // namespace tc74
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} // namespace esphome
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28
esphome/components/tc74/tc74.h
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28
esphome/components/tc74/tc74.h
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#pragma once
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#include "esphome/core/component.h"
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#include "esphome/components/sensor/sensor.h"
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#include "esphome/components/i2c/i2c.h"
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namespace esphome {
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namespace tc74 {
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class TC74Component : public PollingComponent, public i2c::I2CDevice, public sensor::Sensor {
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public:
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/// Setup the sensor and check connection.
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void setup() override;
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void dump_config() override;
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/// Update the sensor value (temperature).
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void update() override;
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float get_setup_priority() const override;
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protected:
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/// Internal method to read the temperature from the component after it has been scheduled.
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void read_temperature_();
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bool data_ready_ = false;
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};
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} // namespace tc74
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} // namespace esphome
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8
tests/components/tc74/test.esp32-ard.yaml
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8
tests/components/tc74/test.esp32-ard.yaml
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i2c:
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- id: i2c_tc74
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scl: 16
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sda: 17
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sensor:
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- platform: tc74
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name: TC74 Temperature
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8
tests/components/tc74/test.esp32-c3-ard.yaml
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8
tests/components/tc74/test.esp32-c3-ard.yaml
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i2c:
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- id: i2c_tc74
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scl: 5
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sda: 4
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sensor:
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- platform: tc74
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name: TC74 Temperature
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8
tests/components/tc74/test.esp32-c3-idf.yaml
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8
tests/components/tc74/test.esp32-c3-idf.yaml
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i2c:
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- id: i2c_tc74
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scl: 5
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sda: 4
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sensor:
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- platform: tc74
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name: TC74 Temperature
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8
tests/components/tc74/test.esp32-idf.yaml
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8
tests/components/tc74/test.esp32-idf.yaml
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i2c:
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- id: i2c_tc74
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scl: 16
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sda: 17
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sensor:
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- platform: tc74
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name: TC74 Temperature
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8
tests/components/tc74/test.esp8266-ard.yaml
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tests/components/tc74/test.esp8266-ard.yaml
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i2c:
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- id: i2c_tc74
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scl: 5
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sda: 4
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sensor:
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- platform: tc74
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name: TC74 Temperature
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8
tests/components/tc74/test.rp2040-ard.yaml
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8
tests/components/tc74/test.rp2040-ard.yaml
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i2c:
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- id: i2c_tc74
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scl: 5
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sda: 4
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sensor:
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- platform: tc74
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name: TC74 Temperature
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