This serial Wifi module add wireless ethernet connectivity to your microcontroller / Arduino through serial TTL pins (Rx and Tx). This means that your microcontroller / Arduino can talk to internet (send or recieve wirelessly).
Moreover, the module has onboiard microcontroller with its own firmware so it will do all the WiFi related tasks and thus free your main microcontroller / Arduino to do other tasks.
The module have many applications starting from sensors network to home automation.
- WiFi communication through serial AT commands.
- Baud rate: 115200
- Operating voltage: 1.7 to 3.6V (3.3V is standard)
- Integrated low power 32-bit CPU could be used as application processor
- On board build it antenna.
Note: the middle 4 pins (GPIO0, 2, CH_PD, RST) must be pulled high to VCC to enable AT commands.