walkie-talkie

An ESP32-based walkie-talkie for communicating on bicycle/motorcycle rides

Clone

• Use the --recursive flag when cloning to pick up the ESP-IDF

Dependencies

• ESP-IDF Tools
  • cd esp-idf
  • export IDF_GITHUB_ASSETS="dl.espressif.com/github_assets"
  • ./install.sh

Parts and Pinouts

Parts

• 1x ESP32 board
• 1x INMP441 I2S MEMS microphone
• 1x PCM5102A I2S DAC

Mic Wiring

ESP32	INMP441
3v3	VDD
GND	GND
GPIO 32	SCK (bit clock)
GPIO 25	WS (word select)
GPIO 33	SD (or is it SO?) (data pin)
GND	L/R (left/right select)

Speaker Wiring

ESP32	PCM5102A
3v3	VIN
GND	GND
GPIO 4	BCK (bit clock)
GPIO 5	LCK (word select)
GPIO 18	DIN (data pin)
GND	SCK (left/right select)

Configure

$ make menuconfig

or

$ idf.py menuconfig

Build

$ make -j8 # Or pick your favorite parallel number

or

$ idf.py build

Run (and see serial output)

$ make -j8 flash monitor

or

$ idf.py flash monitor

Monitor Serial Output

$ make monitor

or

$ idf.py monitor

Exit with Ctrl + ].

Erase Flash

$ make erase_flash

or

$ idf.py erase-flash

Code Format

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clang-format is used for code formatting.

$ make format