Walkie Talkie
summary
Demonstrates a Wi‑Fi internet-linked walkie‑talkie built on an ESP32 LILYGO TTGO T‑Display using I2S audio at 44.1 kHz/16‑bit with ~1500‑byte buffers and audio routed over WebSockets. Uses an INMP441 I2S microphone and a MAX98357A‑style I2S DAC/amplifier for speaker output; server pings every 5 s with a 10 s timeout and a button sends a timestamped handoff. Prototype achieves roundtrip streaming and plays recorded speech on the speaker.
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chapters (14)
- 0:00Introduction
- 8:25Walkie-talkie basics
- 17:49Microphone I2S setup
- 31:54I2S initialization
- 48:27ESP32 project build
- 51:16Audio visualization test
- 53:04Amp and speaker setup
- 1:03:31Speaker audio playback
- 1:05:41Wi-Fi server connection
- 1:14:39WebSocket server setup
- 1:21:56Ping and time sync
- 1:28:59Button press and send
- 1:35:47Server responses
- 1:41:56Conclusion
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