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33 lines
1.2 KiB
C++
33 lines
1.2 KiB
C++
#include "uptime_sensor.h"
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#include "esphome/core/log.h"
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#include "esphome/core/helpers.h"
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namespace esphome {
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namespace uptime {
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static const char *TAG = "uptime.sensor";
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void UptimeSensor::update() {
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const uint32_t ms = millis();
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const uint64_t ms_mask = (1ULL << 32) - 1ULL;
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const uint32_t last_ms = this->uptime_ & ms_mask;
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if (ms < last_ms) {
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this->uptime_ += ms_mask + 1ULL;
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ESP_LOGD(TAG, "Detected roll-over \xf0\x9f\xa6\x84");
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}
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this->uptime_ &= ~ms_mask;
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this->uptime_ |= ms;
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// Do separate second and milliseconds conversion to avoid floating point division errors
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// Probably some IEEE standard already guarantees this division can be done without loss
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// of precision in a single division, but let's do it like this to be sure.
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const uint64_t seconds_int = this->uptime_ / 1000ULL;
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const float seconds = float(seconds_int) + (this->uptime_ % 1000ULL) / 1000.0f;
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this->publish_state(seconds);
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}
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std::string UptimeSensor::unique_id() { return get_mac_address() + "-uptime"; }
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float UptimeSensor::get_setup_priority() const { return setup_priority::HARDWARE; }
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void UptimeSensor::dump_config() { LOG_SENSOR("", "Uptime Sensor", this); }
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} // namespace uptime
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} // namespace esphome
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