[Brian] first reported a new $5 WiFi module back in August ... [TM] has a great tutorial on combining the ESP8266 with an Arduino Mega2560. [TM’s] goal was a simple one: create a WiFi ...

there has not been much of anything on programming this cheap wireless module with the Arduino IDE. Finally, this has changed. After many months of coding, the Arduino IDE supports the ESP8266 module.

Then, an Arduino board might be exactly what you ... so you won't need to buy and work with separate modules. The R4 WiFi is also a more sensible choice for more sophisticated multi-sensor ...

Connector to add external battery to real-time clock (RTC) inside Renesas MCU (MCU RTC power pad held to 5V rail on Minima) Secondary (wireless) processor: 240MHz 3.3V dual core 32bit Espressif ...