ESP32 Language Lab

The project is comparing different languages/technologies for ESP32

hello_world

The application outputs "Hello world!". Then it prints information about chip, flash and heap size. Then the application waits for 10 seconds before rebooting.

Results for ESP32:

	ESP-IDF C	Arduino	CircuitPython	MicroPython	Rust no_std	Rust std	Toit	ESP-IDF ZIG
Chip Target	ESP32	n/a	n/a	n/a	n/a		n/a
CPU Cores	2	2	n/a	n/a	n/a		n/a
Features	WiFi/BTBLE	WiFi/BTBLE	n/a	n/a	n/a		n/a
Flash size	2MB 1	4MB	8192 (?)2	4 MB	n/a		n/a
Free heap	300892	237568	113424	164064	179200 3	296028	n/a	300476

Results for ESP32-S2:

	ESP-IDF C	Arduino	CircuitPython	MicroPython	Rust no_std	Rust std	Toit	ESP-IDF ZIG
Chip Target	esp32s2	n/a
CPU Cores	1	1
Features	WiFi	WiFi
Flash size	2MB 1	4MB
Free heap	246696	229688	70848	2059520	178176 4	246844		248180

Results for ESP32-S3:

	ESP-IDF C	Arduino	CircuitPython	MicroPython	Rust no_std	Rust std	Toit	ESP-IDF ZIG
Chip Target	esp32s3	n/a
CPU Cores	2	2
Features	WiFi/BLE	WiFi/BLE
Flash size	2MB 1	8MB external
Free heap	386744	36992	150432		332800	388016		389976

Results for ESP32-C3:

	ESP-IDF C	Arduino	CircuitPython	MicroPython	Rust no_std	Rust std	Toit	ESP-IDF ZIG
Chip Target	esp32c3
CPU Cores	1
Features	WiFi/BLE
Flash size	2MB 1
Free heap	327840		129808		322556	327124		329700

Results for ESP32-C6:

	ESP-IDF C	Arduino	CircuitPython	MicroPython	Rust no_std	Rust std	Toit	ESP-IDF ZIG
Chip Target	esp32c6	Not supported
CPU Cores	1
Features	WiFi/BLE 802.15.4 (Zigbee/Thread)
Flash size	2MB (1.)
Free heap	468852				440316	471068		471208

Results for ESP32-H2:

	ESP-IDF C	Arduino	CircuitPython	MicroPython	Rust no_std	Rust std	Toit	ESP-IDF ZIG
Chip Target	esp32h2	Not supported
CPU Cores	1
Features	BLE, 802.15.4 (Zigbee/Thread)
Flash size	2MB 1
Free heap	262644				252924	265060		264824

Results for ESP32-P4:

	ESP-IDF C	Arduino	CircuitPython	MicroPython	Rust no_std	Rust std	Toit	ESP-IDF ZIG
Chip Target	esp32p4	Not supported
CPU Cores	2
Features	none
Flash size	2MB 1
Free heap	618680

Notes

Footnotes

1. Compile time value, not auto-detected. ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶

2. Results marked with (?) does not seems to be correct, requires further validation. ↩

3. Rust no_std does not support non-continuous memory. ESP32 memory contains WiFi part in the middle. ↩

4. Rust no_std does not support non-continuous memory. The issue is caused by the bootloader on ESP32-S2. ↩