The ESP32-D0WD-V3 is a 2.4 GHz Wi-Fi (802.11b/g/n) and Bluetooth 4.2 combo transceiver with an integrated dual-core MCU, part of the ESP32 series from Espressif Systems. It packs 34 GPIO lines, 520 KB SRAM, and 448 KB ROM on a single 48-QFN (5x5 mm) package, making it a go-to SoC for connected IoT products that need both compute and wireless in a small footprint.
Key RF and compute parametrics
Transmit power reaches 20.5 dBm, giving designers headroom for link budgets in dense or obstructed environments. Receiver sensitivity of -97 dBm means the front end can lock onto weak signals that would drop a less sensitive part. The memory partition — 520 KB SRAM and 448 KB ROM — supports the full Bluetooth and Wi-Fi protocol stacks while leaving room for application code and data buffers. Typical current draw sits at 95–100 mA in receive and 130–240 mA during transmit, which guides the supply regulator sizing and thermal dissipation on the PCB. Serial interfaces include ADC, I²C, I²S, SDIO, SPI, PWM, and UART, covering the common sensor, display, and memory peripherals in IoT designs.
Production status and sourcing reality
Espressif continues to manufacture this die variant, and it remains the core silicon inside many of their popular modules (e.g., ESP32-WROOM-32).
Supply voltage range is 2.3 V to 3.6 V, compatible with a single 3.3 V rail. The 34 GPIO pins operate at the same supply level; level shifters are needed for 5 V peripherals.