samples: net: lwm2m_client: add hl78xx driver config file

add support for HL78xx driver

Signed-off-by: Zafer SEN <zafersn93@gmail.com>

Author: zafersn

samples/net/common/Kconfig

@@ -6,7 +6,7 @@
 
 config NET_SAMPLE_COMMON_WAIT_DNS_SERVER_ADDITION
 	bool "Wait DNS server addition before considering connection to be up"
-	depends on MODEM_HL7800 && !DNS_SERVER_IP_ADDRESSES
+	depends on (MODEM_HL7800 || MODEM_HL78XX) && !DNS_SERVER_IP_ADDRESSES
 	help
 	  Make sure we get DNS server addresses from the network
 	  before considering the connection to be up.

samples/net/lwm2m_client/overlay-swir_hl78xx_ev_kit.conf

@@ -0,0 +1,75 @@
+# Sierra Wireless HL78XX driver options
+
+# Copyright (c) 2025 Netfeasa Ltd.
+# SPDX-License-Identifier: Apache-2.0
+
+# The HL78xx driver gets its IP settings from the cell network
+CONFIG_NET_CONFIG_SETTINGS=n
+CONFIG_NET_DHCPV4=n
+CONFIG_DNS_SERVER_IP_ADDRESSES=n
+
+#PM
+# CONFIG_PM_DEVICE=y
+
+#uart
+CONFIG_UART_ASYNC_API=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+
+# Generic networking options
+CONFIG_NET_IPV6=n
+
+# DNS
+CONFIG_DNS_RESOLVER=y
+CONFIG_NET_SOCKETS_DNS_TIMEOUT=15000
+
+# Wait for the network to be ready
+CONFIG_NET_SAMPLE_LWM2M_WAIT_DNS=y
+
+# Network management
+CONFIG_NET_MGMT=y
+CONFIG_NET_MGMT_EVENT=y
+CONFIG_NET_CONNECTION_MANAGER=y
+
+# NB-IoT has large latency, so increase timeouts. It is ok to use this for Cat-M1 as well.
+CONFIG_NET_SOCKETS_CONNECT_TIMEOUT=15000
+
+# Network buffers
+CONFIG_NET_PKT_RX_COUNT=32
+CONFIG_NET_PKT_TX_COUNT=16
+CONFIG_NET_BUF_RX_COUNT=64
+CONFIG_NET_BUF_TX_COUNT=32
+
+# Modem driver
+CONFIG_MODEM=y
+
+#hl78xx modem
+CONFIG_MODEM_HL78XX=y
+CONFIG_MODEM_HL7812=y
+
+# Statistics
+CONFIG_MODEM_STATS=y
+CONFIG_SHELL=y
+# Don't require device to have time/date
+CONFIG_MBEDTLS_HAVE_TIME_DATE=n
+
+#apn source
+# CONFIG_MODEM_HL78XX_APN_SOURCE_KCONFIG=y
+# CONFIG_MODEM_HL78XX_APN="internet"
+
+CONFIG_MODEM_HL78XX_BOOT_IN_FULLY_FUNCTIONAL_MODE=y
+
+# RAT selection
+CONFIG_MODEM_HL78XX_AUTORAT=n
+CONFIG_MODEM_HL78XX_RAT_NB1=y
+
+#  Monitor modem events
+CONFIG_HL78XX_EVT_MONITOR=y
+
+# Logging
+CONFIG_LOG_MODE_DEFERRED=y
+CONFIG_LOG_BUFFER_SIZE=50000
+# For extra verbosity
+CONFIG_MODEM_MODULES_LOG_LEVEL_DBG=y
+CONFIG_MODEM_LOG_LEVEL_DBG=y
+CONFIG_MODEM_CHAT_LOG_BUFFER_SIZE=1024
+CONFIG_MODEM_HL78XX_LOG_CONTEXT_VERBOSE_DEBUG=y