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samples: custom_connect: new sample
This sample provides following custom functionality: * BT scanning is handled by application, with additional filters (Bluetooth device name and RSSI) * sync pouch 2x during each BT connection with 5s delay between syncs; this simulates other BT communication that might happen in application code Signed-off-by: Marcin Niestroj <m.niestroj@emb.dev>
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‎samples/custom_connect/CMakeLists.txt‎

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# SPDX-License-Identifier: Apache-2.0
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cmake_minimum_required(VERSION 3.20.0)
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find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
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project(gateway_custom_connect)
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target_include_directories(app PRIVATE include ${CMAKE_CURRENT_BINARY_DIR})
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target_sources(app PRIVATE
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src/main.c
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src/scan.c
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)

‎samples/custom_connect/Kconfig‎

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# Copyright (c) 2025 Golioth, Inc.
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# SPDX-License-Identifier: Apache-2.0
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configdefault MBEDTLS_USE_PSA_CRYPTO
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default n
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configdefault BT_CTLR_DATA_LENGTH_MAX
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default 251
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source "${ZEPHYR_GOLIOTH_FIRMWARE_SDK_MODULE_DIR}/examples/zephyr/common/Kconfig.defconfig"
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source "Kconfig.zephyr"

‎samples/custom_connect/Kconfig.sysbuild‎

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# Copyright (c) 2025 Golioth, Inc.
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# SPDX-License-Identifier: Apache-2.0
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menu "Gateway configuration"
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config POUCH_GATEWAY_CLOUD
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bool "Send pouches to cloud"
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default y
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help
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Disabling cloud communication allows to test Bluetooth gateway
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functionality without relying on communication with backend. All
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pouches received from Bluetooth nodes are dropped in that case.
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config GOLIOTH_COAP_HOST_URI
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string "CoAP server URI"
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default "coaps://coap.golioth.io"
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help
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The URI of the CoAP server.
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endmenu
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menu "BabbleSim components"
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depends on SOC = "native"
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config BSIM_HANDBRAKE
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bool "Handbrake"
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default y if POUCH_GATEWAY_CLOUD
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endmenu
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menu "BabbleSim peripherals"
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depends on SOC = "native"
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config PERIPHERAL_ZEPHYR
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bool "Zephyr"
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help
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Zephyr peripheral sample.
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config PERIPHERAL_ZEPHYR_NUM
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int "Number of Zephyr peripherals"
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default 1
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depends on PERIPHERAL_ZEPHYR
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config PERIPHERAL_PERIODIC_UPLINK
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bool "Periodic uplink"
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help
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Periodic uplink sample.
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config PERIPHERAL_PERIODIC_UPLINK_NUM
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int "Number of periodic uplink peripherals"
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default 1
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depends on PERIPHERAL_PERIODIC_UPLINK
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config PERIPHERAL_BLE_GATT_EXAMPLE
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bool "BLE GATT example"
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default y
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help
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BLE GATT sample.
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config PERIPHERAL_BLE_GATT_EXAMPLE_NUM
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int "Number of BLE GATT example peripherals"
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default 1
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depends on PERIPHERAL_BLE_GATT_EXAMPLE
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endmenu
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config PERIPHERAL_MOUNT_CREDS
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bool "Mount credentials under /creds directory"
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help
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Mount credentials located ${BUILD_DIR}/creds under /creds mountpoint in Zephyr.
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choice BOOTLOADER
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default BOOTLOADER_MCUBOOT if SOC != "native"
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endchoice
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source "share/sysbuild/Kconfig"

‎samples/custom_connect/prj.conf‎

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CONFIG_POUCH_GATEWAY=y
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CONFIG_BT=y
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CONFIG_BT_CENTRAL=y
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CONFIG_BT_MAX_CONN=16
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CONFIG_BT_GATT_CLIENT=y
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CONFIG_BT_GATT_CACHING=n
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CONFIG_BT_GATT_AUTO_UPDATE_MTU=y
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CONFIG_BT_L2CAP_TX_MTU=247
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CONFIG_BT_BUF_ACL_TX_SIZE=251
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CONFIG_BT_BUF_ACL_RX_SIZE=251
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CONFIG_COAP_INIT_ACK_TIMEOUT_MS=3000
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CONFIG_LOG=y
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# Settings subsystem
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CONFIG_FCB=y
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CONFIG_FLASH=y
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CONFIG_FLASH_MAP=y
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CONFIG_SETTINGS=y
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CONFIG_SETTINGS_FCB=y
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# Application
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CONFIG_GOLIOTH_SAMPLE_COMMON=y
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CONFIG_GOLIOTH_SAMPLE_SETTINGS_SHELL=y
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# Golioth Firmware SDK with all dependencies
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CONFIG_GOLIOTH_FIRMWARE_SDK=y
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CONFIG_GOLIOTH_GATEWAY=y
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# Golioth logging backend
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CONFIG_LOG_MODE_DEFERRED=y
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CONFIG_LOG_BACKEND_GOLIOTH=y
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# Application
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CONFIG_MAIN_STACK_SIZE=2048
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CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048
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# Pouch BLE GATT Transport
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CONFIG_POUCH_TRANSPORT_BLE_GATT_COMMON=y
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CONFIG_ZVFS_EVENTFD_MAX=11

‎samples/custom_connect/sample.yaml‎

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sample:
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name: Pouch Gateway with custom connect
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tests:
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bluetooth-gateway.sample.custom_connect:
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tags: bluetooth
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harness: pytest
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harness_config:
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pytest_dut_scope: module
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sysbuild: true
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platform_allow:
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- nrf52_bsim
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integration_platforms:
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- nrf52_bsim
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extra_args:
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- SB_CONFIG_PERIPHERAL_MOUNT_CREDS=y
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- peripheral_ble_gatt_example_0_CONFIG_PICOLIBC=y
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- peripheral_ble_gatt_example_0_CONFIG_FILE_SYSTEM_NSIM_MOUNT=y
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- peripheral_ble_gatt_example_0_CONFIG_EXAMPLE_SYNC_PERIOD_S=2
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timeout: 120

‎samples/custom_connect/socs/native.conf‎

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# Use offloaded sockets using host BSD sockets
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CONFIG_ETH_DRIVER=n
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CONFIG_ETH_NATIVE_POSIX=n
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CONFIG_NET_DRIVERS=y
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CONFIG_NET_SOCKETS=y
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CONFIG_NET_SOCKETS_OFFLOAD=y
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CONFIG_NET_NATIVE_OFFLOADED_SOCKETS=y
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CONFIG_HEAP_MEM_POOL_SIZE=1024
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# Use embedded libc to use Zephyr's eventfd instead of host eventfd
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CONFIG_PICOLIBC=y
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# Static networking
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CONFIG_NET_CONFIG_LOG_LEVEL_DBG=y
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CONFIG_NET_CONFIG_SETTINGS=y
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CONFIG_NET_CONFIG_NEED_IPV4=y
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CONFIG_NET_CONFIG_MY_IPV4_ADDR="192.0.2.1"
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CONFIG_NET_CONFIG_MY_IPV4_GW="192.0.2.2"
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CONFIG_NET_CONFIG_PEER_IPV4_ADDR="192.0.2.2"

‎samples/custom_connect/socs/native_64.conf‎

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# Use offloaded sockets using host BSD sockets
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CONFIG_ETH_DRIVER=n
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CONFIG_ETH_NATIVE_POSIX=n
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CONFIG_NET_DRIVERS=y
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CONFIG_NET_SOCKETS=y
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CONFIG_NET_SOCKETS_OFFLOAD=y
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CONFIG_NET_NATIVE_OFFLOADED_SOCKETS=y
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CONFIG_HEAP_MEM_POOL_SIZE=1024
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# Use embedded libc to use Zephyr's eventfd instead of host eventfd
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CONFIG_PICOLIBC=y
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# Static networking
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CONFIG_NET_CONFIG_LOG_LEVEL_DBG=y
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CONFIG_NET_CONFIG_SETTINGS=y
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CONFIG_NET_CONFIG_NEED_IPV4=y
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CONFIG_NET_CONFIG_MY_IPV4_ADDR="192.0.2.1"
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CONFIG_NET_CONFIG_MY_IPV4_GW="192.0.2.2"
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CONFIG_NET_CONFIG_PEER_IPV4_ADDR="192.0.2.2"

‎samples/custom_connect/socs/nrf9151_ns.conf‎

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# Copyright (c) 2025 Golioth, Inc.
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# SPDX-License-Identifier: Apache-2.0
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# General config
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CONFIG_HEAP_MEM_POOL_SIZE=65536
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CONFIG_NEWLIB_LIBC=y
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# Networking
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CONFIG_NET_SOCKETS_OFFLOAD=y
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CONFIG_NET_IPV6=y
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CONFIG_NET_IPV6_NBR_CACHE=n
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CONFIG_NET_IPV6_MLD=n
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# Increase native TLS socket implementation, so that it is chosen instead of
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# offloaded nRF91 sockets
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CONFIG_NET_SOCKETS_TLS_PRIORITY=35
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# Modem library
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CONFIG_NRF_MODEM_LIB=y
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# LTE connectivity with network connection manager
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CONFIG_NRF_MODEM_LIB_NET_IF=y
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CONFIG_NRF_MODEM_LIB_NET_IF_AUTO_START=y
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CONFIG_NRF_MODEM_LIB_NET_IF_AUTO_CONNECT=n
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CONFIG_NET_CONNECTION_MANAGER=y
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CONFIG_NET_CONNECTION_MANAGER_MONITOR_STACK_SIZE=1024
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# Add Logs for LTE Link Handler
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CONFIG_GOLIOTH_SAMPLE_NRF91_LTE_MONITOR=y
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# Disable options y-selected by NCS for no good reason
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CONFIG_MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED=n
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CONFIG_MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED=n
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CONFIG_MBEDTLS_PK_PARSE_EC_EXTENDED=n
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# MbedTLS configuration to support p-384 curve. These options
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# enable using the MbedTLS built-in support for operations not
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# supported by the default nRF Oberon crypto backend
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CONFIG_NORDIC_SECURITY_BACKEND=n
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CONFIG_MBEDTLS_LEGACY_CRYPTO_C=y
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# Add Network Info Support
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CONFIG_MODEM_INFO=y
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# Generate MCUboot compatible images
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CONFIG_BOOTLOADER_MCUBOOT=y

‎samples/custom_connect/socs/nrf9160_ns.conf‎

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# Copyright (c) 2025 Golioth, Inc.
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# SPDX-License-Identifier: Apache-2.0
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# General config
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CONFIG_HEAP_MEM_POOL_SIZE=65536
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CONFIG_NEWLIB_LIBC=y
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# Networking
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CONFIG_NET_SOCKETS_OFFLOAD=y
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CONFIG_NET_IPV6=y
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CONFIG_NET_IPV6_NBR_CACHE=n
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CONFIG_NET_IPV6_MLD=n
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# Increase native TLS socket implementation, so that it is chosen instead of
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# offloaded nRF91 sockets
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CONFIG_NET_SOCKETS_TLS_PRIORITY=35
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# Modem library
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CONFIG_NRF_MODEM_LIB=y
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# LTE connectivity with network connection manager
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CONFIG_NRF_MODEM_LIB_NET_IF=y
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CONFIG_NRF_MODEM_LIB_NET_IF_AUTO_START=y
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CONFIG_NRF_MODEM_LIB_NET_IF_AUTO_CONNECT=n
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CONFIG_NET_CONNECTION_MANAGER=y
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CONFIG_NET_CONNECTION_MANAGER_MONITOR_STACK_SIZE=1024
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# Add Logs for LTE Link Handler
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CONFIG_GOLIOTH_SAMPLE_NRF91_LTE_MONITOR=y
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# Disable options y-selected by NCS for no good reason
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CONFIG_MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED=n
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CONFIG_MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED=n
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CONFIG_MBEDTLS_PK_PARSE_EC_EXTENDED=n
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# MbedTLS configuration to support p-384 curve. These options
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# enable using the MbedTLS built-in support for operations not
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# supported by the default nRF Oberon crypto backend
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CONFIG_NORDIC_SECURITY_BACKEND=n
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CONFIG_MBEDTLS_LEGACY_CRYPTO_C=y
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# Add Network Info Support
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CONFIG_MODEM_INFO=y
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# Generate MCUboot compatible images
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CONFIG_BOOTLOADER_MCUBOOT=y

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