Power consumption
Power consumption
- The software is fully interrupt-driven and system remains in low-power-mode almost all the time, except for sensing and USB communication
- STAGE 1: Low-power-mode (≈ 2.5mA)
- Almost all the time, CLEON remains in low-power-mode (LPM)
- STAGE 2: MSP430 in AM + GPS on (≈ 33mA)
- MSP430 is in active mode
- Temperature, Humidity, and light sensors are temporarily turned on, then off
- GPS is turned-on, stabilized, and in operation
(In practice, this stablizing time is configurable with limited flexibility and is set to roughly 100ms)
- STAGE 3: MSP430 in AM + GPS on + MicroSD writing (≈ 73mA)
- MSP430 is in active mode
- GPS remains on
- Captured sensor data and GPS signal is written to MicroSD
- STAGE 1: Low-power-mode (≈ 2.5mA)
The figure below shows power consumption for 3 chunks of data with 50ms chunk gap
