Trusted Platform Modules (aka TPM or TPM2.0), store digital keys in a secure way. There is no way for anyone to read keys from a TPM. This high-level information is common knowledge.

But how does a developer actually use a TPM? Most public information regarding TPMs is either very high-level, or so low-level that it’s not helpful to learn from. This blog post will explain with mid-level technical depth & hands-on examples.

At Summit Embedded, a core part of working efficiently is to enable our employees to work from anywhere. Embedded devices aren’t very portable. We’ve found that remote embedded devices need to be physically power cycled from time to time. For this, we connect USB-Controlled Relays in-line with the power supply to each device. This post details a few tweaks that we made to the open-source HID driver called usbrelay to get it working for our setup.