Specification

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Microcontroller: STM32 F103RET6

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Clock Speed: 72MHz

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Bluetooth chip: TI CC2540 (Bluetooth 4.0)

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Communication Range: 30m

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Operating Voltage: 3.3V

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DC Supply: USB Powered or External 7V~12V DC

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Digital I/O Pins: 39

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Analog Input Pins: 11 (Multiplexing Pins)

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External Interrupt: 39 (D0~D38)

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I2C/IWC: 30 (Default SDA), 29 (Default SCL)

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SRAM: 64K

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Flash: 512K (Customizable Flash assignment, refer to Flash chapter）

Default User Code repository: 492K

Default User Data repository: 20K

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SPI: SPI,SPI1

SPI 12(MISO), 11(MOSI), 13(SCK)

SPI1 33(MISO), 34(MOSI), 32(SCK)

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Serial Port: 5 (Serial1/Serial2/Serial3/Serial4/Serial5)

Serial1 0 (Rx1) & 1(Tx1)

Serial2 22(Rx2) & 21(Tx2)

Serial3 30(Rx3) & 29(Tx3)

Serial4 8(Rx4) & 9(Tx4)

Serial5 54(Rx5) & 53(Tx5)

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Dimensions: 68mm x 31mm

The STM32 is a 3.3V processor. Do NOT use any 5V sensor/module with it in case of

burning it!

Board Overview