Negative Temperature and Humidity with DHT11 and DS18B20 with MQ-137/MQ135 on ESP8266

[Gunner]

I think you need to do some further reading about how Blynk works. Starting here…

http://help.blynk.cc/getting-started-library-auth-token-code-examples/blynk-basics/keep-your-void-loop-clean

http://help.blynk.cc/getting-started-library-auth-token-code-examples/blynk-basics/how-to-display-any-sensor-data-in-blynk-app

And here is some code I use with both DHT11/12 and DS18B20 sensors

C++ Blynk (Legacy) - Code Examples for Basic Tasks

#17 - Dual Temperature Sensors running on ESP-01 This is a simple example of running both a DHTxx (in this case DHT11) and DS18B20 1-wire sensors on the lowly ESP-01 [17][clone_546054541] #include <ESP8266WiFi.h> #include <BlynkSimpleEsp8266.h> #include <ESP8266mDNS.h> // For OTA #include <WiFiUdp.h> // For OTA #include <ArduinoOTA.h> // For OTA char auth[] = "xxxxxxxxxx"; // Local Server char ssid[] = "xxxxxxxxxx"; char pass[] = "xxxxxxxxxx"; //char server[] = "xxx.xxx.xxx.xxx"; // I…