mirror of
https://github.com/Threnklyn/esphome-dev.git
synced 2026-05-19 12:43:28 +02:00
Harald Nagel
adb51cf733
* Add MCP9808 temperature sensor * Change from component to sensor; code fixes - Change from component to sensor - Change magic numbers to constants * Fix incorrect logging levels * Add precision to debug log * Fix logging level Co-authored-by: Guillermo Ruffino <glm.net@gmail.com> * Fix bug with comparison to NAN Co-authored-by: Guillermo Ruffino <glm.net@gmail.com>
82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
#include "mcp9808.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace mcp9808 {
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static const uint8_t MCP9808_REG_AMBIENT_TEMP = 0x05;
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static const uint8_t MCP9808_REG_MANUF_ID = 0x06;
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static const uint8_t MCP9808_REG_DEVICE_ID = 0x07;
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static const uint16_t MCP9808_MANUF_ID = 0x0054;
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static const uint16_t MCP9808_DEV_ID = 0x0400;
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static const uint8_t MCP9808_AMBIENT_CLEAR_FLAGS = 0x1F;
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static const uint8_t MCP9808_AMBIENT_CLEAR_SIGN = 0x0F;
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static const uint8_t MCP9808_AMBIENT_TEMP_NEGATIVE = 0x10;
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static const char *TAG = "mcp9808";
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void MCP9808Sensor::setup() {
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ESP_LOGCONFIG(TAG, "Setting up %s...", this->name_.c_str());
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uint16_t manu;
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if (!this->read_byte_16(MCP9808_REG_MANUF_ID, &manu, 0) || manu != MCP9808_MANUF_ID) {
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this->mark_failed();
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ESP_LOGE(TAG, "%s manufacuturer id failed, device returned %X", this->name_.c_str(), manu);
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return;
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}
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uint16_t dev_id;
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if (!this->read_byte_16(MCP9808_REG_DEVICE_ID, &dev_id, 0) || dev_id != MCP9808_DEV_ID) {
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this->mark_failed();
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ESP_LOGE(TAG, "%s device id failed, device returned %X", this->name_.c_str(), dev_id);
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return;
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}
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}
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void MCP9808Sensor::dump_config() {
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ESP_LOGCONFIG(TAG, "%s:", this->name_.c_str());
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LOG_I2C_DEVICE(this);
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if (this->is_failed()) {
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ESP_LOGE(TAG, "Communication with %s failed!", this->name_.c_str());
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}
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LOG_UPDATE_INTERVAL(this);
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LOG_SENSOR(" ", "Temperature", this);
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}
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void MCP9808Sensor::update() {
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uint16_t raw_temp;
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if (!this->read_byte_16(MCP9808_REG_AMBIENT_TEMP, &raw_temp)) {
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this->status_set_warning();
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return;
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}
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if (raw_temp == 0xFFFF) {
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this->status_set_warning();
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return;
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}
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float temp = NAN;
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uint8_t msb = (uint8_t)((raw_temp & 0xff00) >> 8);
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uint8_t lsb = raw_temp & 0x00ff;
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msb = msb & MCP9808_AMBIENT_CLEAR_FLAGS;
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if ((msb & MCP9808_AMBIENT_TEMP_NEGATIVE) == MCP9808_AMBIENT_TEMP_NEGATIVE) {
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msb = msb & MCP9808_AMBIENT_CLEAR_SIGN;
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temp = (256 - ((uint16_t)(msb) *16 + lsb / 16.0f)) * -1;
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} else {
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temp = (uint16_t)(msb) *16 + lsb / 16.0f;
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}
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if (isnan(temp)) {
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this->status_set_warning();
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return;
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}
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ESP_LOGD(TAG, "%s: Got temperature=%.4f°C", this->name_.c_str(), temp);
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this->publish_state(temp);
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this->status_clear_warning();
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}
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float MCP9808Sensor::get_setup_priority() const { return setup_priority::DATA; }
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} // namespace mcp9808
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} // namespace esphome
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