PPK2 measuring high PSM consumption

RE: PPK2 measuring high PSM consumption

Oette — Thu, 27 May 2021 11:18:58 GMT

Hey JONATHAN LL nta_xyz,

The problem was a faulty DK, with a new DK the consumption is where it should be.

RE: PPK2 measuring high PSM consumption

Oette — Tue, 27 Apr 2021 12:59:30 GMT

Not yet, I'll let you know if I figure it out

RE: PPK2 measuring high PSM consumption

nta_xyz — Tue, 27 Apr 2021 07:41:45 GMT

I have exactly the same issue! did you manage to find the problem?

RE: PPK2 measuring high PSM consumption

Oette — Fri, 16 Apr 2021 13:59:25 GMT

I tested ppk with a 200kohm resistor and 1500mV supply voltage and the measurement was 7,67µA. In theory it should be 200kohm/1,5V=7,5µA, so the PPK2 seems to be working correctly.

Here's my hex file (note that it uses nbiot):

devzone.nordicsemi.com/.../udp_5F00_sample_5F00_nbiot.zip

RE: PPK2 measuring high PSM consumption

JONATHAN LL — Fri, 16 Apr 2021 13:08:48 GMT

I dont see anything that should cause the increased current consumption here. Are you able to measure current with a different device to se if the PPK2 is at fault.

At least your HW seems to preform equally to the DK so that does not seem to be the issue.

Could you send me the hex file that you use on the DK so that i can try to replicate the results?

Regards,
Jonathan

RE: PPK2 measuring high PSM consumption

Oette — Wed, 14 Apr 2021 19:18:38 GMT

I meant it is over 1mA when the logging is enabled so CONFIG_SERIAL=y, on both boards.

In my screenshots I had CONFIG_SERIAL=n

EDIT: Here's the full prj.conf file:

#
# Copyright (c) 2020 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

# General config
CONFIG_NEWLIB_LIBC=y
CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
CONFIG_NCS_SAMPLES_DEFAULTS=y
CONFIG_SERIAL=n

# Network
CONFIG_NETWORKING=y
CONFIG_NET_NATIVE=n
CONFIG_NET_SOCKETS=y
CONFIG_NET_SOCKETS_OFFLOAD=y

# LTE link control
CONFIG_LTE_LINK_CONTROL=y
CONFIG_LTE_AUTO_INIT_AND_CONNECT=n

# Modem library
CONFIG_NRF_MODEM_LIB=y

# Heap and stacks
CONFIG_HEAP_MEM_POOL_SIZE=1024
CONFIG_MAIN_STACK_SIZE=4096
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

# LTE parameters
## Network Mode / LTE category
##CONFIG_LTE_NETWORK_MODE_LTE_M=y
CONFIG_LTE_NETWORK_MODE_NBIOT=y

## PSM
CONFIG_UDP_PSM_ENABLE=y
CONFIG_LTE_PSM_REQ_RPTAU="00100110"
CONFIG_LTE_PSM_REQ_RAT="00000000"

## eDRX
CONFIG_UDP_EDRX_ENABLE=n
CONFIG_LTE_EDRX_REQ_VALUE="1001"

## RAI
CONFIG_UDP_RAI_ENABLE=n
CONFIG_LTE_RAI_REQ_VALUE="4"

RE: PPK2 measuring high PSM consumption

JONATHAN LL — Wed, 14 Apr 2021 14:23:24 GMT

Is it 1mA in the UDP sample when CONFIG_SERIAL=n? For both DK and custom HW?

RE: PPK2 measuring high PSM consumption

Oette — Wed, 14 Apr 2021 13:33:00 GMT

I forgot to mention that I already have set it like that. When it's enabled the consumption is over 1mA.

RE: PPK2 measuring high PSM consumption

JONATHAN LL — Wed, 14 Apr 2021 13:30:28 GMT

The 30 sec spikes are normal, those are the refresh mode spikes. And 230 uA is high for for the UDP sample.

try to sett

CONFIG_SERIAL=n

And measure again.

Regards,
Jonathan

RE: PPK2 measuring high PSM consumption

Oette — Wed, 14 Apr 2021 13:25:57 GMT

Hey,

I am powering it from the PPK2, but I also tried powering it from an external source and using ampere mode, but it gave me similar results.

RE: PPK2 measuring high PSM consumption

JONATHAN LL — Wed, 14 Apr 2021 13:10:30 GMT

Hi,

Are you powering the device from the PPK2 or from an external source?
https://infocenter.nordicsemi.com/topic/ug_ppk2/UG/ppk/setting_up.html?cp=9_7_5

Regards,
Jonathan