Seeed Studio Wio-S3 is a compact (21.6 x 16.5 x 3.3 mm) wireless module that combines an ESP32-S3R8 dual-core WiFi 4 and Bluetooth LE MCU and a Semtech SX1262 LoRa transceiver.
The module includes 16MB Flash and 8MB PSRAM, and supports LoRa (EU868/US915) with up to +20.9 dBm transmit power and -137 dBm sensitivity. It also supports Wi-Fi 4 and BLE 5.0, and comes with two IPEX connectors for external antennas. With interfaces such as UART, I2C, SPI, ADC, and USB, and support for -40°C to 85°C operation, it is designed for remote monitoring, industrial automation, smart agriculture, and IoT data logging.
Seeed Studio Wio-S3 module specifications:
- SoC – Espressif ESP32-S3R8
- CPU – Dual-core Tensilica LX7 microcontroller up to 240 MHz with vector instructions for AI acceleration
- Memory – 8MB PSRAM
- Wireless – 2.4 GHz 802.11b/g/n WiFi 4 and Bluetooth 5.0 LE + Mesh connectivity
- Storage – 16MB external SPI flash (option for 32MB)
- Wireless
- LoRa via Semtech SX1262 with support for global frequency plans including EU868, US915, AS923, AU915, KR920, and IN865
- Up to 20.9 dBm LoRa output power and -137 dBm sensitivity (@SF12, BW125kHz)
- 2.4 GHz 802.11b/g/n WiFi 4 and Bluetooth 5.0 LE + Mesh connectivity via ESP32-S3
- Integrated 32MHz TCXO for RF frequency stability
- 2x IPEX antenna connectors
- Expansion – 38-pin SMT package exposing up to 25x GPIOs, 3x UART, 2x I2C, SPI, USB (D+/D-), ADC, PWM, I2S, and CAN (TWAI)
- Power
- Supply – 3.0V to 3.6V (3.3V typical)
- Consumption – Rx: ~5.5 mA; Tx: ~113–127 mA; Sleep: ~9.3 µA
- Dimensions – 21.6 x 16.5 x 3.3 mm
- Temperature Range – -40°C to 85°C
- Certifications – FCC, CE, Telec Certified
The module comes in two variants: the 100020327 SKU features an onboard IPEX connector for plug-and-play antenna attachment, while the 100079384 SKU features RF pads instead, to allow developers to route custom antenna paths or connect external RF front-ends.
On the software side, the Wio-S3 can be programmed with the ESP-IDF framework or Arduino. The company also mentions that it ships with pre-flashed command firmware for quick testing, and you can also build your own applications using Wi-Fi, BLE, and LoRaWAN. It also integrates with platforms like The Things Network and ChirpStack to easily get started with IoT projects.
At the time of writing, I don’t see a development board for the module, but the company provides a reference design instead of a full dev kit. It shows how to build a combined LoRa and Wi-Fi/BLE node. It includes a diagram with dual USB-C power inputs, a 3.3V regulator setup, and basic connections for programming like UART, reset, and boot pins. More technical details, including KiCad design files and STEP 3D models, libraries, and relevant SDKs, are available on the wiki. They also provide a separate module command list page that lists all the System Commands.
Previously, we have written about various development boards, industrial gateways, and handheld communicators that combine an ESP32 with a LoRa module, such as the OBJEX Link S3LW, the EBYTE ECM50-A, and the Heltec WiFi LoRa 32 (V4), but these are typically full-fledged development boards or designed for specific applications. The Wio-S3, on the other hand, is a low-cost 38-pin surface-mount module designed for direct integration into custom smart agriculture, industrial IoT, and edge AI hardware.
The Wio-S3 wireless module is available for $7.99 on the Seeed Studio store, and may soon show up on the company’s AliExpress store.
Debashis Das is a technical content writer and embedded engineer with over five years of experience in the industry. With expertise in Embedded C, PCB Design, and SEO optimization, he effectively blends difficult technical topics with clear communication
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