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[wts01] Fix negative values for WTS01 sensor (#12835)

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This commit is contained in:
Conrad Juhl Andersen
2026-01-03 23:06:33 +01:00
committed by Jonathan Swoboda
parent 178a61b6fd
commit 8b4ba8dfe6
1 changed files with 11 additions and 8 deletions
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19
esphome/components/wts01/wts01.cpp
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@@ -71,17 +71,20 @@ void WTS01Sensor::process_packet_() {
}
// Extract temperature value
int8_t temp = this->buffer_[6];
int32_t sign = 1;
const uint8_t raw = this->buffer_[6];
// Handle negative temperatures
if (temp < 0) {
sign = -1;
// WTS01 encodes sign in bit 7, magnitude in bits 0-6
const bool negative = (raw & 0x80) != 0;
const uint8_t magnitude = raw & 0x7F;
const float decimal = static_cast<float>(this->buffer_[7]) / 100.0f;
float temperature = static_cast<float>(magnitude) + decimal;
if (negative) {
temperature = -temperature;
}
// Calculate temperature (temp + decimal/100)
float temperature = static_cast<float>(temp) + (sign * static_cast<float>(this->buffer_[7]) / 100.0f);
ESP_LOGV(TAG, "Received new temperature: %.2f°C", temperature);
this->publish_state(temperature);