The S3 is the currently most powerful *ESP32 family member combining almost all features in one chip.
Some infrequently used features like Hall Sensor and DAC were removed in exchange for 10 more GPIO pins, a temperature sensor, and BLE 5.0 support.
Compared To ESP32 WROOM/WROVER
Here is the list of removed or reduced features compared to ESP32:
| Feature | Removal |
|---|---|
| Size | 7x7 instead of 5x5 |
| SRAM | reduced from 520 to 512 |
| ROM | reduced from 448 to 384 |
| LED PWM | reduced from 16 to 8 |
| DAC | removed |
| SD Slave | removed |
| Hall Sensor | removed |
| Ethernet | Removed |
New Features
This is what’s new:
| Feature | Addition |
|---|---|
| Bluetooth | BLE v5.0 instead of BLE v4.2 |
| ADC | increased # of channels from 18 to 20 |
| Touch | 14 instead of 10 |
| Temperature Sensor | added |
| GPIO | extended from 34 to 45 |
| SD Host | extended from 1 to 2 |
| USB OTG | added |
In addition, the S3 comes with AI Acceleration Support: the MCU (math coprocessor) is tailored towards the kind of vector calculations needed in AI applications.
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(content created Mar 23, 2024)