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samples: drivers: modem: hello_hl78xx sample
Add HL78xx driver sample application Signed-off-by: Zafer SEN <[email protected]>
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‎samples/drivers/modem/hello_hl78xx/.gitignore‎

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# Copyright (c) 2025 Netfeasa Ltd.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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# editors
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*.swp
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*~
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# build
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/build*/

‎samples/drivers/modem/hello_hl78xx/CMakeLists.txt‎

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# Sierra Wireless HL78XX Sample CMake file
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# Copyright (c) 2025 Netfeasa
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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 $ENV{ZEPHYR_BASE})
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project(hello_hl78xx)
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target_sources(app PRIVATE src/main.c)
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include(${ZEPHYR_BASE}/samples/net/common/common.cmake)

‎samples/drivers/modem/hello_hl78xx/Kconfig‎

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# Sierra Wireless HL78XX Sample options
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# Copyright (c) 2025 Netfeasa
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# SPDX-License-Identifier: Apache-2.0
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source "samples/net/common/Kconfig"
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source "Kconfig.zephyr"

‎samples/drivers/modem/hello_hl78xx/README.rst‎

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.. zephyr:code-sample:: hello_hl78xx
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:name: Hello hl78xx modem driver
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get & set basic hl78xx modem information & functionality with HL78XX modem APIs
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Overview
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********
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A simple sample that can be used with only Sierra Wireless HL78XX series modems
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Notes
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*****
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This sample uses the devicetree alias ``modem`` to identify
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the modem instance to use.
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Building and Running
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********************
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This application can be built and executed on QEMU as follows:
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.. zephyr-app-commands::
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:zephyr-app: samples/drivers/modem/hello_hl78xx
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:host-os: all
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:goals: build flash
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:compact:
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To build for another board, change "qemu_x86" above to that board's name.
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Sample Output
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=============
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.. code-block:: console
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[00:00:12.840,000] <inf> hl78xx_socket: Apn="netfeasavodiot.mnc028.mcc901.gprs"
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[00:00:12.840,000] <inf> hl78xx_socket: Addr=10.149.105.74.255.255.255.252
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[00:00:12.840,000] <inf> hl78xx_socket: Gw=10.149.105.73
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[00:00:12.840,000] <inf> hl78xx_socket: DNS=141.1.1.1
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[00:00:12.840,000] <inf> hl78xx_socket: Extracted IP: 10.149.105.74
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[00:00:12.840,000] <inf> hl78xx_socket: Extracted Subnet: 255.255.255.252
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[00:00:12.840,000] <inf> hl78xx_dev: switch from run enable gprs script to carrier on
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[00:00:15.944,000] <inf> main: IP Up
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[00:00:15.944,000] <inf> main: Connected to network
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**********************************************************
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********* Hello HL78XX Modem Sample Application **********
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**********************************************************
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[00:00:15.980,000] <inf> main: Manufacturer: Sierra Wireless
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[00:00:15.980,000] <inf> main: Firmware Version: HL7812.5.7.3.0
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[00:00:15.980,000] <inf> main: APN: netfeasavodiot
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[00:00:15.980,000] <inf> main: Imei: 351144441214500
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[00:00:15.980,000] <inf> main: RAT: NB1
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[00:00:15.980,000] <inf> main: Connection status: Not Registered
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[00:00:15.980,000] <inf> main: RSRP : -97
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**********************************************************
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[00:00:15.980,000] <inf> main: Setting new APN:
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[00:00:15.980,000] <inf> main: IP down
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[00:00:15.980,000] <inf> main: Disconnected from network
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[00:00:16.013,000] <inf> main: New APN: ""
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[00:00:16.013,000] <inf> main: Test endpoint: flake.legato.io:6000
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[00:00:17.114,000] <inf> main: Resolved: 20.29.223.5:6000
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[00:00:17.114,000] <inf> main: Sample application finished.
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After startup, code performs:
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#. Modem readiness check and power-on
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#. Network interface setup via Zephyr's Connection Manager
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#. Modem queries (manufacturer, firmware, APN, IMEI, signal strength, etc.)
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#. Network registration and signal strength checks
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#. Setting and verifying a new APN
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#. Sending an AT command to validate communication

‎samples/drivers/modem/hello_hl78xx/boards/nrf9160dk_nrf9160_ns.conf‎

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CONFIG_UART_ASYNC_API=y
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CONFIG_UART_1_ASYNC=y
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CONFIG_UART_1_INTERRUPT_DRIVEN=n
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# Enable HW RX byte counting. This especially matters at higher baud rates.
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CONFIG_UART_1_NRF_HW_ASYNC=y
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CONFIG_UART_1_NRF_HW_ASYNC_TIMER=1
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CONFIG_ENTROPY_GENERATOR=y
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CONFIG_TEST_RANDOM_GENERATOR=y
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CONFIG_MODEM_HL78XX_DEV_STARTUP_TIME=1000
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# Disable AT shell as SLM application has no AT mode user pipes
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CONFIG_MODEM_AT_SHELL=n
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# Increase log buffer size to accommodate large dumps
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CONFIG_LOG_MODE_DEFERRED=y
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CONFIG_LOG_BUFFER_SIZE=65535
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CONFIG_MODEM_MODULES_LOG_LEVEL_DBG=y
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CONFIG_MODEM_LOG_LEVEL_DBG=y
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CONFIG_MODEM_CHAT_LOG_BUFFER_SIZE=1024
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CONFIG_MODEM_HL78XX_LOG_CONTEXT_VERBOSE_DEBUG=y
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# Print logs and printk() output on uart0.
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CONFIG_LOG_BACKEND_UART=y
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CONFIG_MODEM_LOG_LEVEL_DBG=y

‎samples/drivers/modem/hello_hl78xx/boards/nrf9160dk_nrf9160_ns.overlay‎

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/ {
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aliases {
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modem = &modem;
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};
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};
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&uart1 {
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compatible = "nordic,nrf-uarte";
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current-speed = <115200>;
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hw-flow-control;
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status = "okay";
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pinctrl-0 = <&uart1_default_alt>;
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modem: hl_modem {
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compatible = "swir,hl7812";
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status = "okay";
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mdm-reset-gpios = <&gpio0 20 (GPIO_ACTIVE_LOW)>;
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socket_offload: socket_offload {
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compatible = "swir,hl7812-offload";
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status = "okay";
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/* optional properties for future: */
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max-data-length = <512>;
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};
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gnss: hl_gnss {
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compatible = "swir,hl7812-gnss";
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pps-mode = "GNSS_PPS_MODE_DISABLED";
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fix-rate = <1000>;
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status = "okay";
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};
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};
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};
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&pinctrl {
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uart1_default_alt: uart1_default_alt {
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group1 {
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psels = <NRF_PSEL(UART_RX, 0, 11)>;
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bias-pull-up;
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};
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group2 {
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psels = <NRF_PSEL(UART_TX, 0, 10)>,
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<NRF_PSEL(UART_RTS, 0, 12)>,
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<NRF_PSEL(UART_CTS, 0, 13)>;
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};
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};
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};

‎samples/drivers/modem/hello_hl78xx/overlay-swir_hl78xx-verbose-logging.conf‎

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# Logging
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CONFIG_LOG_BUFFER_SIZE=85536
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# For extra verbosity
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CONFIG_MODEM_MODULES_LOG_LEVEL_DBG=y
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CONFIG_MODEM_LOG_LEVEL_DBG=y
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CONFIG_MODEM_CHAT_LOG_BUFFER_SIZE=1024
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CONFIG_MODEM_HL78XX_LOG_CONTEXT_VERBOSE_DEBUG=y

‎samples/drivers/modem/hello_hl78xx/prj.conf‎

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# Sierra Wireless HL78XX Sample configuration
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# Copyright (c) 2025 Netfeasa Ltd.
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# SPDX-License-Identifier: Apache-2.0
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# The HL78xx driver gets its IP settings from the cell network
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#system
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CONFIG_HEAP_MEM_POOL_SIZE=4096
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CONFIG_MAIN_STACK_SIZE=4096
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CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096
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CONFIG_POSIX_API=y
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#PM
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# CONFIG_PM_DEVICE=y
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#uart
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CONFIG_UART_ASYNC_API=y
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# Generic networking options
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CONFIG_NETWORKING=y
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CONFIG_NET_UDP=y
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CONFIG_NET_TCP=y
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CONFIG_NET_IPV6=n
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CONFIG_NET_IPV4=y
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CONFIG_NET_SOCKETS=y
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# DNS
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CONFIG_DNS_RESOLVER=y
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CONFIG_NET_SOCKETS_DNS_TIMEOUT=12000
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# Wait for the network to be ready
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CONFIG_NET_SAMPLE_COMMON_WAIT_DNS_SERVER_ADDITION=y
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# Network management
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CONFIG_NET_MGMT=y
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CONFIG_NET_MGMT_EVENT=y
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# NB-IoT has large latency, so increase timeouts. It is ok to use this for Cat-M1 as well.
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CONFIG_NET_SOCKETS_CONNECT_TIMEOUT=15000
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CONFIG_NET_CONNECTION_MANAGER=y
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# Network buffers
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CONFIG_NET_PKT_RX_COUNT=32
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CONFIG_NET_PKT_TX_COUNT=16
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CONFIG_NET_BUF_RX_COUNT=64
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CONFIG_NET_BUF_TX_COUNT=32
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# Modem driver
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CONFIG_MODEM=y
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#hl78xx modem
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CONFIG_MODEM_HL78XX=y
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# Statistics
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CONFIG_MODEM_STATS=y
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CONFIG_SHELL=y
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#apn source
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# CONFIG_MODEM_HL78XX_APN_SOURCE_KCONFIG=y
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# CONFIG_MODEM_HL78XX_APN="internet"
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# CONFIG_MODEM_HL78XX_APN_SOURCE_ICCID=y
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# CONFIG_MODEM_HL78XX_APN_PROFILES="hologram=23450, wm=20601, vodafone=8988239, em=8988303"
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# RAT selection
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CONFIG_MODEM_HL78XX_AUTORAT=n
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# CONFIG_MODEM_HL78XX_AUTORAT_PRL_PROFILES="2,1,3"
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# CONFIG_MODEM_HL78XX_AUTORAT_NB_BAND_CFG="3,8,20,28"
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# CONFIG_MODEM_HL78XX_RAT_NB1=y
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# Stay in boot mode until registered to a network
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# CONFIG_MODEM_HL78XX_STAY_IN_BOOT_MODE_FOR_ROAMING=y
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# Monitor modem events
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CONFIG_HL78XX_EVT_MONITOR=y
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# Logging
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CONFIG_LOG=y

‎samples/drivers/modem/hello_hl78xx/sample.yaml‎

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sample:
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description: Sample for HL78XX modem
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name: Hello HL78XX sample
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common:
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tags:
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- modem
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- hl78xx
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filter: dt_alias_exists("modem")
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tests:
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sample.driver.modem.hello_hl78xx:
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platform_allow:
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- nucleo_u575zi_q
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integration_platforms:
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- nucleo_u575zi_q
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extra_args:
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- SHIELD=swir_hl78xx_ev_kit

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