Arduino Nano Vs Raspberry Pi Pico: What's The Difference?

The Raspberry Pi Pico is the new kid on the microcontroller block. How does it compare to the long-established Arduino Nano?
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I found an off-grid open source VPN, and it's amazing

Decentralized mesh networks are one, and if you've used any of the next-gen VPN solutions like Tailscale or ZeroTier, you ...