From 1aab87b41c1d5a236a3dac63a096674aede19555 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=98=9F=E9=87=8ESKY?=
 <87404327+FlyingFeng2021@users.noreply.github.com>
Date: Mon, 4 Mar 2024 09:02:40 +0800
Subject: [PATCH] handling with the negative temperature in the sensor tmp102
 (#6316)

---
 esphome/components/tmp102/tmp102.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/esphome/components/tmp102/tmp102.cpp b/esphome/components/tmp102/tmp102.cpp
index f6bb9a05c0..7d92a28cf1 100644
--- a/esphome/components/tmp102/tmp102.cpp
+++ b/esphome/components/tmp102/tmp102.cpp
@@ -28,7 +28,7 @@ void TMP102Component::dump_config() {
 }
 
 void TMP102Component::update() {
-  uint16_t raw_temperature;
+  int16_t raw_temperature;
   if (this->write(&TMP102_REGISTER_TEMPERATURE, 1) != i2c::ERROR_OK) {
     this->status_set_warning();
     return;
@@ -39,7 +39,9 @@ void TMP102Component::update() {
     return;
   }
   raw_temperature = i2c::i2ctohs(raw_temperature);
-
+  if (raw_temperature & 0x8000) {
+    raw_temperature |= 0xF000;
+  }
   raw_temperature = raw_temperature >> 4;
   float temperature = raw_temperature * TMP102_CONVERSION_FACTOR;
   ESP_LOGD(TAG, "Got Temperature=%.1f°C", temperature);