The 2.4 GHz Wi-Fi MCU module integrates an ESP32-S2 single-core Xtensa 32-bit LX7 processor operating up to 240 MHz. It includes 4 MB SPI flash, 2 MB PSRAM, 37 GPIOs, and an on-board PCB antenna. The module supports IEEE 802.11b/g/n operation from 2412 to 2484 MHz with data rates up to 150 Mbps. It operates from a 3.0 to 3.6 V supply across -40 to 85 °C and is RoHS/REACH green certified. The module measures 18.0 × 31.0 × 3.3 mm and is marked End of Life.
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| Wireless standard | IEEE 802.11b/g/n |
| Operating frequency | 2412 to 2484MHz |
| Maximum data rate | 150Mbps |
| CPU core | Xtensa single-core 32-bit LX7 |
| CPU frequency | Up to 240MHz |
| Embedded flash | 4MB |
| PSRAM | 2MB |
| GPIO count | 37 |
| Antenna type | On-board PCB antenna |
| Supply voltage | 3.0 to 3.6V |
| Operating ambient temperature | -40 to 85°C |
| Module dimensions | 18.0 × 31.0 × 3.3mm |
| Chip revision | v1.0 |
| Peak TX current at 802.11b 1 Mbps | 340mA |
| RX current at 802.11b/g/n 20 MHz | 81mA |
| Typical TX power at 802.11b 1 Mbps | 19.5dBm |
| RoHS | Compliant |
| REACH | Compliant |
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