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Toddler Phone Calls Family And No One Else
A hobbyist built a toddler-safe telephone that can only call pre-set family contacts. An ESP32-S3 acts as a USB host for a commercial retro-style handset and runs a minimal SIP client connecting over WiFi to a VoIP account, in this case Twilio. There are no inbound calls, so there's no risk of scam calls. Each contact gets an arcade button that lights up based on that contact's time zone, and a text-to-speech voice announces network errors or when it isn't call time.
