NodeMCU ESP8266 with DHT22, BMP180, ML8511, MQ135 & KY037 sensors
ESP-01 DHT11 Temperature, Humidity, LED Light and ESP-01 Free Heap Monitor.
Using a raspberry pi b+ GPIO pins and python I constructed a 15 sec updating feed from a DHT22 humidity sensor, and two DB20S18 temperature sensors to give an outside temperature and humidity and inside temperature every 15 seconds to Thingspeak