The 2.4 GHz Wi-Fi and Bluetooth LE MCU module integrates an Xtensa dual-core 32-bit LX6 microprocessor running up to 240 MHz. It supports IEEE 802.11b/g/n, Bluetooth v4.2 BR/EDR, and Bluetooth LE with 2412 MHz to 2484 MHz operation. The module provides up to 26 GPIOs, rich digital and analog peripherals, a 40 MHz crystal oscillator, Quad SPI flash options from 4 MB to 16 MB, and optional 2 MB PSRAM on supported variants. It operates from a 3.0 V to 3.6 V supply across -40 °C to 85 °C or -40 °C to 105 °C versions and uses an on-board PCB antenna. The module measures 18.0 mm by 25.5 mm by 3.1 mm and is REACH/RoHS green certified.
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| Wireless standard | IEEE 802.11b/g/n |
| Bluetooth protocol | Bluetooth v4.2 BR/EDR and Bluetooth LE |
| Operating frequency range | 2412 to 2484MHz |
| Processor core | Xtensa dual-core 32-bit LX6 |
| Maximum CPU clock frequency | 240MHz |
| ROM | 448KB |
| SRAM | 520KB |
| RTC SRAM | 16KB |
| Flash memory | 4, 8, or 16 Quad SPIMB |
| PSRAM | Optional 2 Quad SPI on R2 variantsMB |
| GPIO count | Up to 26 |
| Antenna | On-board PCB antenna |
| Supply voltage | 3.0 to 3.6V |
| External supply current capability | 0.5 minimumA |
| Operating ambient temperature | -40 to 85 or -40 to 105, version dependent°C |
| Module dimensions | 18.0 × 25.5 × 3.1mm |
| Wi-Fi 802.11n maximum data rate | 150Mbps |
| Typical 802.11b transmit power at 1 Mbps | 19.5dBm |
| Typical 802.11b receiver sensitivity at 1 Mbps | -97dBm |
| Crystal oscillator frequency | 40MHz |
| RoHS | Compliant |
| REACH | Compliant |
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