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Fix: Incorporate unique serial number in preference's hash for multiple Sensirion sensors (#5479)
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3 changed files with 12 additions and 6 deletions
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@ -1,5 +1,6 @@
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#include "sen5x.h"
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#include "esphome/core/hal.h"
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#include "esphome/core/helpers.h"
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#include "esphome/core/log.h"
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#include <cinttypes>
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@ -135,9 +136,12 @@ void SEN5XComponent::setup() {
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ESP_LOGD(TAG, "Firmware version %d", this->firmware_version_);
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if (this->voc_sensor_ && this->store_baseline_) {
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// Hash with compilation time
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uint32_t combined_serial =
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encode_uint24(this->serial_number_[0], this->serial_number_[1], this->serial_number_[2]);
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// Hash with compilation time and serial number
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// This ensures the baseline storage is cleared after OTA
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uint32_t hash = fnv1_hash(App.get_compilation_time());
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// Serial numbers are unique to each sensor, so mulitple sensors can be used without conflict
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uint32_t hash = fnv1_hash(App.get_compilation_time() + std::to_string(combined_serial));
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this->pref_ = global_preferences->make_preference<Sen5xBaselines>(hash, true);
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if (this->pref_.load(&this->voc_baselines_storage_)) {
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@ -73,9 +73,10 @@ void SGP30Component::setup() {
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return;
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}
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// Hash with compilation time
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// Hash with compilation time and serial number
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// This ensures the baseline storage is cleared after OTA
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uint32_t hash = fnv1_hash(App.get_compilation_time());
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// Serial numbers are unique to each sensor, so mulitple sensors can be used without conflict
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uint32_t hash = fnv1_hash(App.get_compilation_time() + std::to_string(this->serial_number_));
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this->pref_ = global_preferences->make_preference<SGP30Baselines>(hash, true);
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if (this->pref_.load(&this->baselines_storage_)) {
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@ -61,9 +61,10 @@ void SGP4xComponent::setup() {
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ESP_LOGD(TAG, "Product version: 0x%0X", uint16_t(this->featureset_ & 0x1FF));
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if (this->store_baseline_) {
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// Hash with compilation time
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// Hash with compilation time and serial number
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// This ensures the baseline storage is cleared after OTA
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uint32_t hash = fnv1_hash(App.get_compilation_time());
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// Serial numbers are unique to each sensor, so mulitple sensors can be used without conflict
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uint32_t hash = fnv1_hash(App.get_compilation_time() + std::to_string(this->serial_number_));
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this->pref_ = global_preferences->make_preference<SGP4xBaselines>(hash, true);
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if (this->pref_.load(&this->voc_baselines_storage_)) {
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