application: serial_lte_modem: new nRF Cloud service

Separate nRF Cloud service from the GNSS service to allow
include/exclude of nRF Cloud services by configurating prj.conf,
and allow more nRF Cloud-specific services be added later.

New configuration CONFIG_SLM_NRF_CLOUD for nRF Cloud access.
nRF Cloud A-GPS, P-GPS and Location service to be configured
separately with lib_nrfcloud configuration items:
.Remove CONFIG_SLM_LOCATION, to use CONFIG_NRF_CLOUD_LOCATION.
.Remove CONFIG_SLM_AGPS, to use CONFIG_NRF_CLOUD_AGPS.
.Remove CONFIG_SLM_PGPS, to use CONFIG_NRF_CLOUD_PGPS.

Enable nRF Cloud A-GPS and Location service by default.

Signed-off-by: Jun Qing Zou <jun.qing.zou@nordicsemi.no>

applications/serial_lte_modem/CMakeLists.txt

@@ -26,6 +26,7 @@ target_sources_ifdef(CONFIG_SLM_NATIVE_TLS app PRIVATE src/slm_native_tls.c)
 target_sources_ifdef(CONFIG_SLM_NATIVE_TLS app PRIVATE src/slm_at_cmng.c)
 
 add_subdirectory_ifdef(CONFIG_SLM_GNSS src/gnss)
+add_subdirectory_ifdef(CONFIG_SLM_NRF_CLOUD src/nrfcloud)
 add_subdirectory_ifdef(CONFIG_SLM_FTPC src/ftp_c)
 add_subdirectory_ifdef(CONFIG_SLM_MQTTC src/mqtt_c)
 add_subdirectory_ifdef(CONFIG_SLM_HTTPC src/http_c)

applications/serial_lte_modem/Kconfig

@@ -17,6 +17,7 @@ config SLM_AT_MODE
 	bool "Serial LTE Modem by raw AT mode"
 	default y
 	select AT_CMD_PARSER
+	select AT_MONITOR
 
 config SLM_AT_MAX_PARAM
 	int "Maximum number of parameters in AT command"
@@ -124,7 +125,14 @@ config SLM_SMS
 	help
 	  Support SMS send/receive in plain text
 
-rsource "src/gnss/Kconfig"
+config SLM_GNSS
+	bool "GNSS support in SLM"
+	default y
+
+config SLM_NRF_CLOUD
+	bool "nRF Cloud support in SLM"
+	default y
+
 rsource "src/ftp_c/Kconfig"
 rsource "src/mqtt_c/Kconfig"
 rsource "src/http_c/Kconfig"

applications/serial_lte_modem/doc/AT_commands_intro.rst

@@ -47,3 +47,4 @@ The modem-specific AT commands are documented in the `nRF91 AT Commands Referenc
    TWI_AT_commands
    GPIO_AT_commands
    CARRIER_AT_commands
+   NRFCLOUD_AT_commands