30 lines
1 KiB
Markdown
30 lines
1 KiB
Markdown
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# Exercise 14: Power (Charging + Visual)
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This exercise is intentionally narrow in scope:
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- Detect if a battery is present.
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- Detect if USB/VBUS power is present.
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- Determine if charging is needed.
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- Keep charging enabled through AXP2101 PMU settings.
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- Flash the PMU charge LED while charging.
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- If fully charged, leave LED off (do nothing).
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OLED behavior:
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- For the first 2 minutes after boot, OLED shows:
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- `Exercise 14 Power`
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- node name (`NODE_LABEL`)
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- time (RTC/system time if available, else uptime)
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- charging state and battery stats
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- After 2 minutes, it switches to a steady `Power Monitor` header while continuing live stats.
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## Meshtastic references used
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- `src/Power.cpp`
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- charging detection path (`isCharging()`, `isVbusIn()`, battery checks)
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- `src/modules/StatusLEDModule.cpp`
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- PMU charging LED control via `PMU->setChargingLedMode(...)`
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## Build and upload
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```bash
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cd /usr/local/src/microreticulum/microReticulumTbeam/exercises/14_Power
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pio run -e ed -t upload
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pio device monitor -b 115200
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```
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