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Copy file name to clipboardExpand all lines: boards/esp32c3/xiao_esp32c3.md
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image: "/boards/esp32c3/xiao_esp32c3.jpg"
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description: ESP32-C3 thumb-size board with external antenna.
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excerpt: >
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The XIAO ESP32 C3 is a thumb-size board with external antenna.
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The XIAO ESP32 C3 is a thumb-size board with an I-PEX connector for an external antenna.
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---
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{% from 'macros.njk' import carousel %}
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{ "file": "./xiao_esp32c3-2.jpg", "text": "XIAO ESP32C3 back view"}
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]) }}
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This board comes with
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* ESP32-C3 WIFI & Bluetooth LE RISC-V Single-Core CPU
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* USB-C connector, directly connected to ESP32-C3 processor.
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* 4MB Flash
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* Boot and Reset Button
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* GPIO 2 - 10 and 20 on connector pins
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* somehow compatible to other XIAO boards and shields
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* I-PEX connector for an external antenna
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* LiPo charging (battery connector pads on the back)
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* JTag signals (through connector pads on the back)
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* 5V to 3.3V regulator on board.
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* Board size: 18 * 21 mm
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The ESP32-C3 processor has a 32-bit single core RISC-V CPU running at max. 160MHz and
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400KB SRAM memory. Bluetooth LE is supported.
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400KB SRAM memory. Bluetooth LE is supported. See [ESP32-C3 Boards](/boards/esp32c3/index.md)
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There is no antenna on this board and the external antenna that is shipped with the board or any other 2.4 GHz WiFi antenna with a common I-PEX connector must be connected for using any WiFi or Bluetooth functionality. An external antenna usually provides outstanding RF performance compared to on-board antenna solutions.
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As there are no additional power consuming components on this board
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it fits good for
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battery based use cases. It has a onboard lithium battery charging chip to recharge
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using the USB-C connector.
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As there are no additional power consuming components on this board it fits good for battery based use cases. It has a
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onboard lithium battery charging chip to recharge using the USB-C connector.
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## LiPo charging
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There is a battery connector using solder pads available on the bottom of the board to attach a Li-Ion Battery. The charging using the USB power. A on-board LED will indicate the charging mode.
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