Toit is a modern high-level language designed specifically for microcontrollers
Toit is optimised for live reloading on your microcontroller. Your code runs incrementally as you write it and you get instant feedback. Push changes over your local WiFi in two seconds and reserve your USB cable for charging your phone. You iterate quickly, learn fast, and build better things.
Hello, world!
Everyone likes to start with a simple program, so here is the obligatory "Hello, world!" program in Toit. Define your main function by writing its name, followed by a colon. The body of the function is indented by two spaces. The "print" function takes one argument - you don't need parentheses.
Learn more...main:
print "Hello, World!"
Toit + Jaguar = 🥳
Jaguar is a small application developed by the Toit team, that runs on your ESP32. It enables live reloading and lets you update and restart your ESP32 code over WiFi.
Update your code and restart your ESP32 conveniently over WiFi. No need to flash over serial, reboot your device, or wait for it to reconnect to your network.
Change your code in your editor, update it on your device, and restart it all within seconds.
Updates contain compiled Toit programs that are relocated and installed in flash on the device. Old versions are stopped and their resources are freed automatically.
No ESP32?
The Toit language can also be used on the desktop. In fact, we use it to develop many of the tools that come with the SDK.
Documentation
Learn how to code with Toit and how you can use it in your IoT projects.
Latest news
Toit v2.0.0-alpha.185 release Jun. 17th, 2025
Require i2c closing to be successful. Accept she-bang Toit files that don't have 'toit' extension. Fix GPIO pin, when using input, output, and initial value. Fix 'toit decode' without a snapshot. Fix Windows unicode issues. Fix SPI on Linux.
Toit v2.0.0-alpha.184 release Jun. 2nd, 2025
Add UTF-8 manifest to all executables. Improve compiler for invalid UTF-8 files. Update Debian changelog to latest version. Use the 'toit' executable as compiler for the LSP and toitdoc. Fix signing of disk images (dmg).
Toit v2.0.0-alpha.182 release May. 26th, 2025
Don't use the latest Ubuntu for the deb-file generation. Fix toitdoc generation for the SDK. Fix executable signing for the new paths.
Toit v2.0.0-alpha.181 release May. 26th, 2025
Add riscv64 cross-compilation support. Warn when an import uses an upper-case character. Warn if import segments don't match the case of the path. Install Toit in standard locations. Pessimize local types in the presence of non-local branches. Apply RMT patch in ESP-IDF. Fix GPIO on raspberry pi. Fix memory leak with pattern encoder.
Toit v2.0.0-alpha.180 release May. 9th, 2025
Add support for pm (power management) functions. Add 'set-pull' to GPIO. Add finalizers for more resources. Use a weak map in the ServiceResourceProxy. Rewrite DAC to use new API. Implement new API for RMT and add support for encoders. Update ESP-NOW to use the latest API. Fix truthy type propagation. Improve type propagation for `identical`. Drop ifs with two dead blocks.
Toit v2.0.0-alpha.179 release Mar. 31st, 2025
Fix i2c regression that led to stack overflows when calling read-address.
Writing a driver in Toit
Just a few lines of Toit code are needed to reap the full benefits of the Toit ecosystem — without having to rely on firmware developers.
Choosing Toit for your IoT project means that your ESP32-based devices become as easy to program as smartphones: develop your app, deploy it to the devices of your choice, and then update and reinstall as often as needed, even on a shaky connection — all that while the other apps on the device keep running. Welcome to the 21st century, IoT!
Toit meets Visual Studio Code
The extension allows VSCode to provide a rich view of your programs as well as easy access to common functionality like running and deploying apps.