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[bl0942] Fix millis overflow in packet timeout check (#14285)

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Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
This commit is contained in:
Jonathan Swoboda
2026-02-25 14:28:47 -05:00
committed by GitHub
parent df77213f2c
commit 3f558f63d8
2 changed files with 5 additions and 5 deletions
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8
esphome/components/bl0942/bl0942.cpp
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@@ -52,12 +52,12 @@ void BL0942::loop() {
return;
}
if (avail < sizeof(buffer)) {
if (!this->rx_start_) {
if (!this->rx_start_.has_value()) {
this->rx_start_ = millis();
} else if (millis() > this->rx_start_ + PKT_TIMEOUT_MS) {
} else if (millis() - *this->rx_start_ > PKT_TIMEOUT_MS) {
ESP_LOGW(TAG, "Junk on wire. Throwing away partial message (%zu bytes)", avail);
this->read_array((uint8_t *) &buffer, avail);
this->rx_start_ = 0;
this->rx_start_.reset();
}
return;
}
@@ -67,7 +67,7 @@ void BL0942::loop() {
this->received_package_(&buffer);
}
}
this->rx_start_ = 0;
this->rx_start_.reset();
}
bool BL0942::validate_checksum_(DataPacket *data) {

2
esphome/components/bl0942/bl0942.h
View File

@@ -140,7 +140,7 @@ class BL0942 : public PollingComponent, public uart::UARTDevice {
uint8_t address_ = 0;
bool reset_ = false;
LineFrequency line_freq_ = LINE_FREQUENCY_50HZ;
uint32_t rx_start_ = 0;
optional<uint32_t> rx_start_{};
uint32_t prev_cf_cnt_ = 0;
bool validate_checksum_(DataPacket *data);