# \[Hilo\] How to optimize the electrical consumption of Hilo?
**URL:** https://forum.sierrawireless.com/t/hilo-how-to-optimize-the-electrical-consumption-of-hilo/6629
**Category:** HL Series FAQ
**Created:** [July 24, 2013, 6:33am UTC](https://forum.sierrawireless.com/t/hilo-how-to-optimize-the-electrical-consumption-of-hilo/6629 "2013-07-24T06:33:55Z")
**Posts on this page:** 1
**Page:** 1
### Author:  [@FAQ\_Poster](https://forum.sierrawireless.com/u/FAQ_Poster)
#### Post date: [July 24, 2013, 6:33am UTC](https://forum.sierrawireless.com/t/hilo-how-to-optimize-the-electrical-consumption-of-hilo/6629/1 "2013-07-24T06:33:55Z")
Answer: Please find the following Software and Hardware advices;
SOFTWARE ADVICE:
1/ Use \ (The sleep mode has to be managed by your application via the DTR)
2/ Use \ (The Hilo manages itself the sleep mode)
HARDWARE ADVICE:
VBAT: no impact on the consumption.
VBACKUP: If unused, you have to put a capacitor to the GND.
VGPIO: If you use this signal as a power supply or as a input signal in your design, it can impacts the electrical consumption of the Hilo.
POK\_IN: The best way is to drive it with an open drain.
SPI -\> Not connected?
ADC: If you use it, it can impact the electrical consumption of the Hilo.
GPIO: All the GPIO have to be put in a “passive state” according to your design. If you do not use the GPIO, the best configuration is INPUT with a PULL DOWN.
SIM: The Hilo manages itself this signals and put it in “passive state” as soon as possible. (when no access to the SIM card is requested)
PWM: If you use it, it can impact the electrical consumption of the Hilo.
UART: You can disable your UART in order to have a less consumption.
AUDIO: It strongly depends on your design