WT32C3-S1 and WT32C3-S2 are general-purpose Wi-Fi and Bluetooth LE (Bluetooth LE) modules, which are low-power and cost-effective embedded wireless network control modules. It can meet the needs of IoT applications such as smart grid, building automation, security, smart home, and telemedicine.

WT32C3-S1 Datasheet V1.0.1 2020-02-01


Both WT32C3-S1 and WT32C3-S2 modules are equipped with 4 MB external SPI flash. WT32C3-S1 adopts PCB onboard antenna, WT32C3-S2 adopts connector to connect external antenna.
The WT32C3-S1 and WT32C3-S2 modules use the ESP32-C3 chip. The ESP32-C3 chip is equipped with a RISC-V 32-bit single-core processor, and the main frequency supports up to 160MHz.
The module supports the standard IEEE802.11 b/g/n protocol, Bluetooth low energy 5.0 (Bluetooth LE): Bluetooth 5, Bluetoothmesh. Users can use this module to add Bluetooth distribution and networking functions to existing devices, or to build an independent network controller.


Available in SDM-19 package

Onboard PCB Antenna, IPEX Antenna

Working voltage: 3.3V

Working ambient temperature: -20-85°C

Built-in ESP32-C3 chip, RISC-V 32-bit single-core microprocessor, main frequency up to 160MHz


Support IEEE 802.11 b/g/n protocol

Supports 1T1R mode with data rates up to 150 Mbps

WIFI @2.4 GHz, support WEP/WPA-PSK/WPA2-PSK security mode

Frame aggregation (TX/RX A-MPDU, RX A-MSDU)


Bluetooth Low Energy 5.0 (Bluetooth LE): Bluetooth 5, Bluetooth mesh

Rates support 125 Kbps, 500 Kbps, 1 Mbps, 2 Mbps

Advertising Extensions

Multiple Advertisement Sets

Channel Selection Algorithm


Supports GPIO, SPI, UART, I2C, I2S, IR Transceiver, LED PWM Controller, USB JTAG Interface, Universal DMA Controller, TWAITM Controller (ISO11898-1 Compatible), Temperature Sensor, SAR A/D Converter

Support STA/AP/STA+AP working mode

Remote OT support