feather nrf9160 battery power

jerryneedell

I have a battery (Li-Ion 3.7 V ) connected to my feather nrf9160.
When I load one of the sample apps – blinky, it runs normally and continues to run if I disconnect the USB port, but if I then press the RESET button, it does not resume running. If I measure the voltage on the 3.3V pin, I only see _300mV.

I see 4.17V on Vbat.

I have similar results with the accelerometer sample as well.

Also, has the “orange” led been replaced by a “green” led? I see a green LED when I pluck in the USB port.
The Schematic lists it as orange.

jaredwolff

The nRF9160 Feather is set up default for system deep sleep (turning off the power supply) In order to keep it powered you’ll need to modify JMP2. (See below)

jerryneedell

AH – Thank you – I have not tried the “deep-sleep” sample yet. I’ll explore that next.

What about the “green” vs “orange” led?

jaredwolff

jerryneedell What about the “green” vs “orange” led?

What do you mean here?

jerryneedell

Both the schematic and the PCB files refer to an orange LED at D4 but I only see a green LED. Is that green LED the “charging” indicator.

How do I post an image here?

jaredwolff

Ahh ok. It’s green. For some reason the manufacture considers it Green-Orange

jerryneedell

;-) Thanks – I was questioning my eyesight….and my ability to read a schematic

jerryneedell

Clearly, I am very confused by the default setting of JMP2.
How do you wake it from deep sleep?

when I load the deep_sleep sample
I see the following, but I don’t see any output from the program or any response to a button press.

SPM: NS image at 0x1c200SPM: NS MSP at 0x2001a6d0
SPM: NS reset vector at 0x1ecbd
SPM: prepare to jump to Non-Secure image.

jaredwolff

You hold the Mode button until it states it’s going to sleep. (If you have it plugged in it will never go to full deep sleep) Wakeup sources is the mode button (external input) or the onboard RTC which is running at all times as long as the board has 5v USB or VBATT.

Hope that helps 🙂

jerryneedell

Sort of — I can see the voltage on 3.3V change when it its unplugged and I press the Mode button – also the blue led comes on, but when I have it plugged it to USB, I never see any output from the program.
Where do you “see” it state is is going to sleep?