# RPi Zero 2 W + HSM4 Qs

**URL:** <https://community.zymbit.com/t/rpi-zero-2-w-hsm4-qs/1738>\
**Category:** HSM4\
**Tags:** digital-wallet\
**Created:** [February 21, 2025, 8:25pm UTC](https://community.zymbit.com/t/rpi-zero-2-w-hsm4-qs/1738 "2025-02-21T20:25:54Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Strykar](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.zymbit.com/strykar/32/1195_2.png) [@Strykar](https://community.zymbit.com/u/Strykar)\
**Post date:** [February 21, 2025, 8:25pm UTC](https://community.zymbit.com/t/rpi-zero-2-w-hsm4-qs/1738/1 "2025-02-21T20:25:54Z")

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I was evaluating tiny, low power SoCs that could run a simple Web3 Go application and even run unattended on solar when I came across the Zymkey4 - an amazing solution for storing valuable crypto keys on an RPi Zero with boot validation! Being able to choose an HSM6 as a hardware wallet is a nice upgrade option IMO.

Some Qs:

1. Can the HSM6 provide boot validation and A / B encryption like the 4?
2. Is the CortexM0 accesible to the user, could it be used to power the RPi Zero on and off on a timer?
3. Is the [HSM4 Developer Kit – zymbit](https://store.zymbit.com/products/hsm4-developer-kit-1) the only current hardware available for sale to prototype with an RPi Zero?
4. What would be the easiest way to add GPS to the HSM4 and RPi Zero?
5. What does a minimum order look like to select things like Zymbit’s high-accuracy RTC?

Thanks!