The C6 was announced in 2021. It took until 2023 before boards were available in quantities and is a connectivity update to the C3 with added support for Wifi 6, Zigbee and Thread.
Compared To ESP32 C3
Here is the list of enhancements compared to the C3:
| Feature | Addition |
|---|---|
| GPIO | 30 instead of 22 |
| I2C | 2 instead of 1 |
| Bluetooth | BLE v5.0 instead of BLE v4.2 |
| WiFi | WiFi6 added |
| SRAM | 512 instead of 400 |
| ROM | 384 instead of 320 |
| RTC RAM | 16 instead of 8 |
| ADC | 7 instead of 6 channels |
| UART | 3 instead of 2 |
| SD Slave | added |
| TWAI (CAN 2.0) | 2 instead of 1 |
| Zigbee/Thread | added |
The number of SPI was reduced from 3 to 1.
As of this writing, the C6 does not support the Arduino Framework yet. You cannot currently program it using the Arduino IDE or platformio. Instead, you must use the ESP-IDF from Expressif. This is going to change soonish, and eventually, the C6, too, will support the universal ArduinoIDE.
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(content created Mar 23, 2024)