2.4 GHz Wi-Fi MCU module integrates an ESP32-S2 single-core Xtensa LX7 microprocessor running up to 240 MHz. It supports IEEE 802.11 b/g/n operation from 2412 to 2484 MHz with a data rate up to 150 Mbps. The module includes 4 MB SPI flash, 37 GPIOs, a PCB antenna, and a 40 MHz crystal oscillator. It operates from a 3.0 to 3.6 V supply over a -40 to 85 °C ambient temperature range and measures 18.0 × 31.0 × 3.3 mm. RoHS and REACH green certifications are specified.
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| Embedded chip | ESP32-S2 |
| CPU core | Xtensa single-core 32-bit LX7 |
| CPU frequency | Up to 240MHz |
| ROM | 128KB |
| SRAM | 320KB |
| RTC SRAM | 16KB |
| Flash memory | 4MB |
| Wi-Fi standard | IEEE 802.11 b/g/n |
| Wi-Fi frequency range | 2412 to 2484MHz |
| Maximum Wi-Fi data rate | 150Mbps |
| GPIO count | 37 |
| Antenna | PCB antenna |
| Crystal oscillator | 40MHz |
| Operating voltage | 3.0 to 3.6V |
| Typical supply voltage | 3.3V |
| Minimum external supply current | 0.5A |
| Operating ambient temperature | -40 to 85°C |
| Module dimensions | 18.0 × 31.0 × 3.3mm |
| Moisture sensitivity level | MSL 3 |
| Typical TX power at 802.11b 1 Mbps | 19.5dBm |
| RoHS | Compliant |
| REACH | Compliant |
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