Low power mode

postpiet · 20 Mar

Hello,
First the nrf9160 feather v5 is a great IoT board!
I use a few of them with a power supply.
Now I would like to make it work on a battery power supply.
I use the pkk2 power profiler but my current with the Active Sleep Sample does not go below 6mA in the full sleep mode. While in the readme the current is specified at <30uA. This is the difference between a week and a few years on battery supply.

I have used the Vusb and the 3.3v pins to test. The 3.3v has a bit lower consumption but not mutch.
Are there known problems to get the power consumption lower?

jaredwolff · 20 Mar

postpiet did you modify the sample at all? What version of NFED are you using?

postpiet · 20 Mar

Yes a little because I got error “undefined reference to ''__device_dts_ord_84” so I commended out the below code in setup_uart() and disabled the UART in dev tree. With NFED I think you mean nrf sdk version? That is V2.6.1.
`

static const struct device *const console_dev = DEVICE_DT_GET(DT_CHOSEN(zephyr_console));
/* Disable console UART */
   
int err = pm_device_action_run(console_dev, PM_DEVICE_ACTION_SUSPEND);
if (err < 0)
{
	printk("Unable to suspend console UART. (err: %d)\n", err);
	return err;
}

`