From a6e77cc5dc289c50ec6e9c5b519ad0da90a3ffed Mon Sep 17 00:00:00 2001
From: Hendrik Langer <hendrik+dev@xd0.de>
Date: Fri, 26 Jul 2019 14:58:59 +0200
Subject: [PATCH] internal temp sensor

---
 src/main.cpp | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index df682c9..06d9707 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -31,6 +31,10 @@
 
 #include "icons.h"
 
+extern "C" {
+uint8_t temprature_sens_read();
+}
+
 static const char* TAG = "MAIN";
 
 WiFiMulti wifiMulti;
@@ -156,7 +160,12 @@ void sendValues() {
     mqtt.publish(topic_temperature.c_str(), temperature, strlen(temperature));
     mqtt.publish(topic_humidity.c_str(), humidity, strlen(humidity));
     mqtt.publish(topic_pressure.c_str(), pressure, strlen(pressure));
-}
+  } else {
+    String topic_temperature = String("thomas/sensor/") + ota.getMAC() + String("/temperature");
+    float esp32_temperature = (temprature_sens_read() - 32) / 1.8;
+    char temperature[8]; sprintf(temperature, "%.2f", esp32_temperature-29.40);
+    mqtt.publish(topic_temperature.c_str(), temperature, strlen(temperature));
+  }
 
   if (uv_active) {
     String topic_uvi = String("thomas/sensor/") + ota.getMAC() + String("/uvi");
@@ -288,7 +297,7 @@ void loop()
     ESP_LOGD(TAG, "loop()");
 
   /* Do an e-paper display refresh every 2 minutes */
-  if (millis() - lastDisplayUpdate >= 2*60*1000) {
+  if (millis() - lastDisplayUpdate >= 1*60*1000) {
     lastDisplayUpdate = millis();
     display.setFullWindow();
     display.setRotation(1);
@@ -314,6 +323,9 @@ void loop()
         display.print(bme.readPressure() / 100.0F);
         display.println(" hPa");
       } else {
+        display.print("Temperatur: ");
+        float esp32_temperature = (temprature_sens_read() - 32) / 1.8;
+        display.println(esp32_temperature-29.40);
         display.println("kein BME280");
       }