ESP8266 WiFi development board

Spec:

• Processor: L106 32-bit RISC microprocessor core based on the Tensilica Xtensa Diamond Standard 106Micro running at 80 MHz
• Memory:
  • 32 KiB instruction RAM
  • 32 KiB instruction cache RAM
  • 80 KiB user-data RAM
  • 16 KiB ETS system-data RAM
• IEEE 802.11 b/g/n Wi-Fi
  
• 17 GPIO pins
• SPI
• I²C (software implementation)
• I²S interfaces with DMA (sharing pins with GPIO)
• UART on dedicated pins, plus a transmit-only UART can be enabled on GPIO2
• 10-bit ADC (successive approximation ADC)

Ways to Program:

• Arduino IDE
• MicroPython
• JavaScript