Thingy:91 Trying to disable BME680 sensor in Zephyr

[Hetsh]

I'm building an LTE device that only needs the GPS, LTE, motion, and button.

I'm trying as the first step to disable all the sensors that are not needed so that I don't send unneeded data to the cloud. Latter will have to eliminate their FW code from the project.

I could successfully eliminate the light sensor data using Configure nRF connect SDK project GUI and the GPS and everything else works fine, but when I tried to disable the BME680 sensor from Zephyr Kernel I had a strange situation where the GPS is not sending to the cloud and the button although I did not touch them in the GUI.

Best Regards,

HeTsH (Hesham) 

[Didrik Rokhaug]

Hi.

Could you share your prj.conf file (assuming that is where you have made changes to the asset_tracker application)?

By default, the GPS is started if you press the button for 10 seconds, or if you move the Thingy.

If you still have the button enabled, you could try to hold it, and see if that starts the GPS. But, as you want to disable to button as well, you will have to modify the code so that it starts the GPS based on another criterion.

The easiest way to do that is to set CONFIG_GPS_START_AFTER_CLOUD_EVT_READY=y. This option (in the asset_tracker application) is disabled by default, but if enabled it will start the GPS automatically as soon as the device is connected to nRF Cloud.

Best regards,

Didrik

[Hetsh]

Thank you Didrik,

Bellow is the prj.conf and this only makes the connection and no message shows on the terminal

:

#
# Copyright (c) 2019 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-BSD-5-Clause-Nordic
#
# General config
CONFIG_NEWLIB_LIBC=y
CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
CONFIG_ASSERT=y
CONFIG_REBOOT=y
CONFIG_LOG=y
CONFIG_LOG_IMMEDIATE=y

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

# LTE link control
CONFIG_POWER_OPTIMIZATION_ENABLE=n
#CONFIG_POWER_OPTIMIZATION_ENABLE=y
CONFIG_LTE_LINK_CONTROL=y
CONFIG_LTE_NETWORK_MODE_LTE_M_GPS=y
CONFIG_LTE_AUTO_INIT_AND_CONNECT=n
CONFIG_LTE_LINK_CONTROL_LOG_LEVEL_DBG=y

CONFIG_LTE_NETWORK_MODE_NBIOT_GPS=n
CONFIG_LTE_LEGACY_PCO_MODE=n
CONFIG_LTE_PSM_REQ_RPTAU="00000110"
CONFIG_LTE_PSM_REQ_RAT="00000010"

# Modem info
CONFIG_MODEM_INFO=y

# BSD library
CONFIG_BSD_LIBRARY=y
CONFIG_BSD_LIBRARY_TRACE_ENABLED=n

# nRF Cloud
CONFIG_CLOUD_API=y
CONFIG_NRF_CLOUD=y
CONFIG_NRF_CLOUD_LOG_LEVEL_DBG=y
CONFIG_NRF_CLOUD_AGPS=y
CONFIG_NRF_CLOUD_CONNECTION_POLL_THREAD=y
CONFIG_NRF_CLOUD_NONBLOCKING_SEND=y
# Needed for the cloud codec
CONFIG_CJSON_LIB=y
# Shorter to prevent NAT timeouts
CONFIG_MQTT_KEEPALIVE=120
# Don't resubscribe to topics if broker remembers them
CONFIG_CLOUD_PERSISTENT_SESSIONS=y

# Sensors
CONFIG_ACCEL_USE_SIM=y
#CONFIG_TEMP_USE_SIM=n
#CONFIG_CLOUD_BUTTON=y
CONFIG_TEMP_USE_SIM=y
CONFIG_CLOUD_BUTTON=n

# GPS
CONFIG_NRF9160_GPS=y
# CONFIG_GPS_USE_SIM=y
CONFIG_NRF9160_GPS_LOG_LEVEL_DBG=y
CONFIG_GPS_USE_EXTERNAL=y
CONFIG_GPS_DEV_NAME="NRF9160_GPS"
CONFIG_GPS_CONTROL_PSM_ENABLE_ON_START=y

CONFIG_GPS_CONTROL_FIRST_FIX_CHECK_DELAY=10
CONFIG_GPS_CONTROL_FIX_CHECK_INTERVAL=30
CONFIG_GPS_CONTROL_FIX_TRY_TIME=180
CONFIG_GPS_CONTROL_PSM_DISABLE_ON_STOP=n

# Library for buttons and LEDs
CONFIG_DK_LIBRARY=y
CONFIG_DK_LIBRARY_INVERT_LEDS=n

# Console
CONFIG_CONSOLE_SUBSYS=y
CONFIG_CONSOLE_HANDLER=y
CONFIG_CONSOLE_GETCHAR=y

# Heap and stacks
CONFIG_HEAP_MEM_POOL_SIZE=16384
CONFIG_MAIN_STACK_SIZE=8192
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048
CONFIG_HW_STACK_PROTECTION=y

# MCUBOOT
CONFIG_BOOTLOADER_MCUBOOT=y
CONFIG_IMG_MANAGER=y
CONFIG_MCUBOOT_IMG_MANAGER=y

# Flash
CONFIG_FLASH=y
CONFIG_IMG_ERASE_PROGRESSIVELY=y

# AWS FOTA
CONFIG_AWS_FOTA=y
CONFIG_FOTA_DOWNLOAD=y
CONFIG_AWS_FOTA_LOG_LEVEL_DBG=y
CONFIG_AWS_JOBS_LOG_LEVEL_DBG=y
CONFIG_DFU_TARGET=y

# Download client (needed by AWS FOTA)
CONFIG_DOWNLOAD_CLIENT=y
CONFIG_DOWNLOAD_CLIENT_STACK_SIZE=4096

# Fatal error
CONFIG_RESET_ON_FATAL_ERROR=n
CONFIG_WATCHDOG=y

[Didrik Rokhaug]

Did you try to add CONFIG_GPS_START_AFTER_CLOUD_EVT_READY=y?

[Hetsh]

Yes, I did but that did not solve the problem but I could achieve this by changing the code calling the environmental sensors.

I think this Ticket can be closed here.

Thank you.

HeTsH