In 2020, Expressif released both the S-Series and the first member of the C-Series.
C3 - RISC-V Architecture
The ESP32 C3 marks a fundamental change in processor architecture as it now uses RISC-V. The C3 is a very fast one-core microcontroller.
ESP32 C3 produced by Seeed
Changes Compared To ESP32 WROOM/WROVER
Here is the list of removed or reduced features compared to ESP32:
| Feature | Removal |
|---|---|
| Cores | 1 instead of 2 |
| Frequency | reduced from 240 to 160 |
| SRAM | reduced from 520 to 400 |
| ROM | reduced from 448 to 384 |
| RTC RAM | reduced from 16 to 8 |
| GPIOs | reduced from 34 to 22 |
| LED PWM | reduced from 16 to 6 |
| UART | reduced from 3 to 2 |
| SPI | reduced from 4 to 3 |
| ADC | reduced channels from 18 to 6 |
| Motor PWM | removed |
| Touch | removed |
| DAC | removed |
| SD support | removed |
| Hall Sensor | removed |
| Ethernet | removed |
| Camera support | removed |
New Features
This is what’s new:
| Feature | Addition |
|---|---|
| Bluetooth | BLE v5.0 instead of BLE v4.2 |
| WiFi | WiFi-Alliance/WPA 3 certified |
| Temperature Sensor | added |
| SD Host | extended from 1 to 2 |
| USB OTG | added |
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(content created Mar 23, 2024)