An example made using the Adafruit Huzzah board with ESP-12 module and the DHT22 temperature humidity sensor.
This code example, when loaded onto the ESP will continuously upload temperature and humidity data onto emoncms.org
CP2102 USB to UART adapter was used as power supply and to program the ESP. PlatformIO or Arduino IDE can be used to compile and upload code. See PlatformIO compile and upload guide
Thanks to @myrddinmuse for puting together this example.