$25 Ameba Arduino IoT Board Powered by Realtek RTL8195AM MCU Supports WiFi and NFC
Ameba Arduino is another development board for the Internet of Things, but beside WiFi connectivity, it also includes an NFC tag, and can support Ethernet via Arduino compatible headers. The brain of the board is Realtek RTL8195AM ARM Cortex M3 MCU that includes WiFi connectivity, hardware SSL, SRAM, and flash.
Ameba Arduino Specifications:
- MCU – Realtek RTL8195AM ARM Cortex M3 @ up to 166MHz with 512KB SRAM, 1MB ROM, WiFi connectivity, hardware SSL engine
- Memory – 2MB SDRAM
- Connectivity – WiFi 802.11 b/g/n 1T1R with PCB antenna and external antenna connector, NFC tag with read/write Function, 10/100M Ethernet via expansion headers
- USB – 1x micro USB OTG port, 1x micro USB host port
- Expansion Headers
- SDIO Device/SD card controller
- Up to 30x GPIOs
- 2x SPI interfaces supporting master and slave modes
- 3x UART interfaces including 2 HS-UART and one log UART
- 4x I2C Interfaces supporting master and slave mode
- 2x I2S/PCM interfaces supporting master and slave mode
- 4x PWM interfaces
- 2x ADC interfaces, 1x DAC interface
- Debugging – micro USB for CMSIS-DAP debugger, UART console, and JTAG
- Misc – DAP update, DAP reset, and Ameba reset buttons
- Power Supply – 5V via micro USB port
A sensor board with motion sensors (9-axis), a temperature and humidity sensor, a proximity sensor, a pressure sensor, an hear rate sensor, and a buzzer is also mentioned in the documentation, but I could not find pictures or more much details about this extension board.
You’ll need a (Windows) PC, a micro USB to USB cable, an RS-232 to UART board, and optionally a JTAG cable to work with the board.
Beside programming with the Arduino IDE, the company also provides an mbed + FreeRTOS SDK for more flexibility.