ESP32-C3 may be one of the most expected RISC-V processors in the IoT world, as it’s eventually expected to sell for the same price as ESP8266 and offers both WiFi and Bluetooth LE connectivity.
Some engineering samples of the chip. modules and boards were distributed to developers shortly after the announcement at the end of the last year, but now it appears ESP32-C3-DevKitM-1 board will become available for $8 next month from distributors such as Mouser or DigiKey.
- Wireless module – ESP32-C3-MINI-1 with ESP32-C3FH4 (105°C) or ESP32-C3FN4 (85°C) 32-bit RISC-V single-core processor, up to 160 MHz, 4 MB embedded flash, 384 KB ROM, 400 KB SRAM (16 KB for cache), 8 KB SRAM in RTC
- Connectivity – 2.4 GHz 802.11b/g/n Wi-Fi 4 & Bluetooth LE 5.0
- USB – 1x Micro USB port for power and programming via USB-UART bridge
- Expansion – 2x headers with GPIO, ADC, UART, SPI, etc…
- Misc – RGB LED, Reset and Boot buttons
- Power Supply
- 5V via Micro USB port, default power supply
- 5V or 3.3V via header pins
- Dimensions – 38.9 x 25.4 mm excluding PCB antenna
The board can currently be programmed with the ESP-IDF framework, and you’ll find documentation to get started on Espressif’s website.
There’s no stock information on DigiKey, but on Mouser the following quantities are on order:
- 291 – Expected 4/19/2021
- 281 – Expected 5/10/2021
The board can also be found on Aliexpress for $13 with a couple left. It should also be noted that at $8, ESP32-C3-DevKitM-1 is exactly the same price as ESP32-S2-DevKitM-1. The ESP32-C3-MINI-1 modules are already competitively priced with Mouser offering samples for $1.8-$1.9, and stock expected on May 21st.