The Nordic nRF52840 SoC combines an Arm Cortex-M4 running at 64 MHz with a Bluetooth Low Energy radio. The CPU has 256 kilobytes of RAM with over 200 kilobytes available free for program and variable usage! On-chip there is one megabyte of flash memory with an additional eight megabytes available external to the SoC.
Compared to the previous Bangle.js, the new display supports an always-on mode. In addition, there are 176 x 176 pixels 3-bit color inside of a 1.3" illuminated screen. Williams says the battery should last up to two weeks and can be re-charged with the included magnetic charging cable.
Bangle.js 2 offers an air pressure and a temperature sensor in addition to the standard smartwatch sensing elements like a GPS, accelerometer, and heart rate monitor.
There is good news and potentially bad news if you are interested in buying a Bangle.js 2. The good news is that Williams has run successful hardware crowdfunding campaigns in the past. Most of which delivered within one month of the estimated delivery. With an eye on the 2021 component situation, Williams already has 2500 Bangle.js 2 in production. So, delivery could happen as early as late November 2021. The potentially bad news is that a limited number of watches remain available in the Bangle.js 2 Kickstarter Campaign. So, if you're interested, you better act fast!