jerryscript VS Espruino

JerryScript

Some IoT platforms use Duktape and JerryScript as their engines.

I've been having a lot of fun with https://kalumajs.org/ recently for silly JS embedded things. It's been great so far, and has a cool little community!

It's a runtime built on top of JerryScript, which has been pretty neat to look into as well: https://jerryscript.net/

Jerryscript came to mind : https://github.com/jerryscript-project/jerryscript

I personally quite like JerryScript

Based on JerryScript, the creators also provide an IDE and serial communication tool on their website. There's also ample documentation and guides. Looking forward to getting more into this.

I hear you loud and clear.

There are subsets of JS for embedded device e.g. Espruino https://github.com/espruino/Espruino for BangleJS https://shop.espruino.com/banglejs also with 4MB or JerryScript https://jerryscript.net

Fitbit uses Jerryscript in some of their watch OSes. Well, at least they were last time I was tinkering with making my own watch face

https://jerryscript.net/

Espruino

The Bangle.js 2 is an excellent device. As a former Pebble user, this is the first device that I consider an adequate replacement for my Pebble (which by now has a diminished battery life and corroded charging contacts).

Here is my impression of the Bangle.js 2:

- Battery: Lasts about 3 weeks on a charge, constantly connected to my phone, when the watch is used to display notifications and alarms. This is a major advantage over Apple Watches and Android/Wear OS watches.

- Display and buttons: The 1.3" 8-color transflective display is comparable to the Pebble Time series' 64-color transflective display. The display is always on, and the backlight activation is highly configurable. The Bangle.js 2 has a touchscreen and 1 button, while Pebble watches have no touchscreen and 3 buttons.

- Software: Runs on the completely free and open source Espruino JavaScript interpreter,[1] which was my main motivation for purchasing this device. There are currently 336 apps in the web-based Bangle.js app loader (app store), including utilites and clocks (watch faces), all of which are FOSS. The bootloader and firmware can be updated directly from the app loader. On Android, there is a distribution of Gadgetbridge (built from the same code base as Gadgetbridge) with internet access enabled that integrates the Bangle.js app loader into Gadgetbridge, which makes it very easy to use the watch.[2]

- Build: Built on the same device body as the SMA Q3.[3] The casing is plastic, and the watch is compatible with standard 20 mm watch straps. The IP67 water/dust resistance makes the watch usable for sports.

Overall, I highly recommend the Pebble.js 2 watch, which is the best FOSS-focused watch I have found to date.

[1] Espruino JavaScript interpreter: https://github.com/espruino/Espruino

[2] Bangle.js Gadgetbridge (distribution): https://www.espruino.com/Gadgetbridge

[3] SMA Q3: https://www.smawatch.com/details?product_id=130

This is the firmware repo for the BangleJS : https://github.com/espruino/Espruino

This makes use of a JS interpreter made for embedded devices: Espruino

More details in the Espruino repo: https://github.com/espruino/Espruino

There are subsets of JS for embedded device e.g. Espruino https://github.com/espruino/Espruino for BangleJS https://shop.espruino.com/banglejs also with 4MB or JerryScript https://jerryscript.net

- Espruino (2.2k stars)