Seeed Studio
Seeed XIAO ESP32-C3 Add Wi-Fi and Bluetooth to a project for the price of a coffee.
Build & code ESP32-C3 Budget Wi-Fi
Bring along USB-C cable, the supplied antenna, and firmware you write.
Keep in mind Single core, four ADC pins and no on-board antenna — it is cheap because it is minimal. Source checked · Sep 18, 2026 Image credit Maker product photo · XIAO ESP32-C3 · Seeed Studio
Overview Blueprint 3 Specifications 19 Resources 4
(02) Blueprint
What’s published Seeed publishes the schematic PDF and chip datasheet for the XIAO ESP32C3; the related GitHub repo has only a footprint/pinout library, not the module's own PCB source.
1 git clone https://github.com/Seeed-Studio/OSHW-XIAO-Series.git
Research notes Seeed-Studio/OSHW-XIAO-Series contains a KiCad footprint/symbol library for using the XIAO module as a component in other designs, not the XIAO board's own internal schematic/PCB source, so overall openness is 'schematics' rather than 'open-hardware'.
Every link checked 2026-09-27.
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Processor & memory 3 Processor ESP32-C3, single-core 32-bit RISC-V with a four-stage pipeline, up to 160 MHz Memory 400 KB SRAM and 4 MB flash on-chip Radio 3 Wi-Fi IEEE 802.11 b/g/n, supporting station, SoftAP, combined and promiscuous modes Bluetooth Bluetooth LE 5.0 with Bluetooth mesh Antenna External RF antenna included; the maker presents it as the source of the board's RF performance Interfaces & power 11 Buses 1× UART, 1× I²C, 1× SPI Pins 11 digital I/O usable as PWM; 4 analogue I/O usable as ADC Power input 5 V on VIN, or 3.7 V on the battery pin Output Maximum 3.3 V, 500 mA output; tested at a 3.8 V battery input with 3 A source capability Charging 380 mA fast charge; 40 mA trickle Wi-Fi current Typical: 75 mA active, 25 mA modem sleep, 4 mA light sleep Bluetooth current Typical: 27 mA modem sleep, 10 mA light sleep Deep sleep 44 µA in the specification table; about 43 µA in the feature list on the same page Temperature −40 to 85 °C working range Controls Reset button and boot button Price checked US$4.99 at the maker's store Compatibility 2 Grove Shield Compatible with the Grove Shield for Seeeduino XIAO Expansion caveat On the Seeeduino XIAO Expansion board the SWD spring contacts are not compatible with this board No matching specification. Try a chip name, connector or feature.
What still needs checking No battery runtime is published, only per-mode current figures described as typical. No range figure is given for the supplied external antenna.
Downloads & docs
Source & revision notes Maker listing checked Sep 18, 2026. Detailed documentation reviewed Sep 18, 2026. Not hands-on tested.
Price is a dated listing; confirm with the maker.
The maker quotes deep sleep as 44 µA in the specification table and about 43 µA in the feature list on the same page. Both are typical values for the bare board.
The board is Grove Shield compatible, but the maker notes the SWD spring contacts on the Seeeduino XIAO Expansion board are not compatible with it.
Wi-Fi range depends on fitting the supplied external antenna; there is no usable on-board antenna substitute.
Deep sleep is quoted twice on the maker's page with slightly different numbers (44 µA and about 43 µA). Both are recorded above.
Power figures are stated at a 3.8 V battery input, not at 5 V over USB.
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