ESP8266 WIFI Shield
- Operating voltage 5V (supplied from the Arduino Board)
- Connection via: 802.11b/g networks
- Encryption types: WEP and WPA2 Personal
- Connection with Arduino on SPI port
- on-board micro SD slot
- ICSP headers
- FTDI connection for serial debugging of WiFi shield
- Mini-USB for updating WiFi shield firmware
- 32-bit RISC architecture
- The processor can operate at 80MHz / 160MHz
- 32MB flash memory
- 64kB for instructions
- 96kB for data
- Operates in AP, Station or AP + Station mode
- It has 11 digital pins
- It has 1 analogue pin with 10-bit resolution
- Digital pins except the D0 have interrupts, PWM, I2C and one wire
- Programmable through USB or WiFi (OTA)
- Compatible with Arduino IDE
- Compatible with modules and sensors used in Arduino