BoardPilotDS1302 real-time clock module with ESP32
Supply 3.3-5 V
Bus GPIO
Measures time
Pins and ESP32 wiring
| Pin | Role | ESP32 pin | Notes |
|---|---|---|---|
| VCC | Power | 3V3 | |
| GND | Ground | GND | |
| CLK | Input (the ESP32 drives it) | D25 | Serial clock. This is a 3-wire bus, not I2C |
| DAT | Input (the ESP32 drives it) | D26 | Data, both directions |
| RST | Input (the ESP32 drives it) | D27 | Chip enable (CE): HIGH during a transfer |
Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.
Sources
- Maxim DS1302 datasheet, 3-wire interface (CE, I/O, SCLK); supply 2.0 to 5.5 V
Try it in 3D in BoardPilot
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Part data: CC BY 4.0, free to reuse with credit to BoardPilot.