This parses Oregon Scientific protocol v3 signals from a 433MHz receiver and sends the data to a MQTT server.

The hardware uses an ESP8266 Sparkfun Thing in order to contact wifi directly. GPIO 4 is input from an external 433MHz receiver unit

In order to compile you have to provide a local.c with this content in it:

const char *wifi_ssid =  "***YOUR WIFI SSID***";
const char *wifi_pass =  "***YOUR WIFI PASSWORD***";
const int mqtt_host_ip[4] = {
    /* Your MQTT server's host ip address */
};

MQTT topic structure is:

Topic	Description
osc/rain	rain total inches, don't know the time range for the total?
osc/rain_rate	rain rate in inches per hour
osc/wind_speed	average speed m/s
osc/wind_gust	gust speed m/s
osc/wind_direction	0 through 360 degrees, compass rose... however direction is quantized internally to 16 segments coming off the sensor
osc/temperature	celsius
osc/humidity	whole percent