“Build a weather station driven by a NodeMCU (esp8266) board written and Arduino and send the gathered data to ThingSpeak.
SWS (Simple Weather Station)
A Simple Weather Station controlled by a NodeMCU dev board writen in Arduino which reports data through ThingSpeak.
About the ESP8266
Wikipedia:
The ESP8266 is a low-cost Wi-Fi chip with full TCP/IP stack and MCU (microcontroller unit) capability produced by Shanghai-based Chinese manufacturer, Espressif Systems.
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Main features
Humidity and temperature measurement via DHT11.
Atmospheric pressure and temperature via BMP180.
Luminosity measurement with an LDR.
Multi access point (can manage more than one SSID / password).
OTA upload (upload new code from the Arduino IDE On The Air, just by using the wifi connection).
Upload sensor readings to ThingSpeak.
Bill of materials
1 x NodeMCU V3 dev board (esp8266): ~2,65 USD.
1 x DHT11 sensor: ~1,00 USD.
1 x BMP180 sensor: ~1,70 USD.
2 x 10K resistors: ~0,10 USD.”