diff --git a/arch/nrf52/nrf52.ini b/arch/nrf52/nrf52.ini
index 4a77ec4b2..36effe017 100644
--- a/arch/nrf52/nrf52.ini
+++ b/arch/nrf52/nrf52.ini
@@ -23,7 +23,7 @@ build_flags =
   -DMESHTASTIC_EXCLUDE_PAXCOUNTER=1
 
 build_src_filter = 
-  ${arduino_base.build_src_filter} -<platform/esp32/> -<platform/stm32wl> -<nimble/> -<mesh/wifi/> -<mesh/api/> -<mesh/http/> -<modules/esp32> -<platform/rp2xx0> -<mesh/eth/> -<mesh/raspihttp>
+  ${arduino_base.build_src_filter} -<platform/esp32/> -<platform/stm32wl> -<nimble/> -<mesh/wifi/> -<mesh/api/> -<mesh/http/> -<modules/esp32> -<platform/rp2xx0> -<mesh/eth/> -<mesh/raspihttp> -<serialization/>
 
 lib_deps=
   ${arduino_base.lib_deps}
diff --git a/platformio.ini b/platformio.ini
index 520ec740e..528563def 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -102,6 +102,14 @@ lib_deps =
 	# renovate: datasource=custom.pio depName=Syslog packageName=arcao/library/Syslog
 	arcao/Syslog@2.0.0
 
+; Minimal networking libs for nrf52 (excludes Syslog to save flash)
+[nrf52_networking_base]
+lib_deps =
+	# renovate: datasource=custom.pio depName=TBPubSubClient packageName=thingsboard/library/TBPubSubClient
+	thingsboard/TBPubSubClient@2.12.1
+	# renovate: datasource=custom.pio depName=NTPClient packageName=arduino-libraries/library/NTPClient
+	arduino-libraries/NTPClient@3.2.1
+
 [radiolib_base]
 lib_deps =
 	# renovate: datasource=custom.pio depName=RadioLib packageName=jgromes/library/RadioLib
diff --git a/variants/nrf52840/rak2560/platformio.ini b/variants/nrf52840/rak2560/platformio.ini
index 2b73aca03..edc648b9b 100644
--- a/variants/nrf52840/rak2560/platformio.ini
+++ b/variants/nrf52840/rak2560/platformio.ini
@@ -11,10 +11,10 @@ build_flags = ${nrf52840_base.build_flags}
   -DRADIOLIB_EXCLUDE_SX127X=1
   -DRADIOLIB_EXCLUDE_LR11X0=1
   -DHAS_RAKPROT=1 ; Define if RAk OneWireSerial is used (disables GPS)
-build_src_filter = ${nrf52_base.build_src_filter} +<../variants/nrf52840/rak2560> +<mesh/api/> +<mqtt/>
+build_src_filter = ${nrf52_base.build_src_filter} +<../variants/nrf52840/rak2560> +<mesh/api/> +<mqtt/> +<serialization/>
 lib_deps = 
   ${nrf52840_base.lib_deps}
-  ${networking_base.lib_deps}
+  ${nrf52_networking_base.lib_deps}
   melopero/Melopero RV3028@^1.1.0
   https://github.com/beegee-tokyo/RAK-OneWireSerial/archive/0.0.2.zip
 debug_tool = jlink
diff --git a/variants/nrf52840/rak4631/platformio.ini b/variants/nrf52840/rak4631/platformio.ini
index 199e17570..83feaa06c 100644
--- a/variants/nrf52840/rak4631/platformio.ini
+++ b/variants/nrf52840/rak4631/platformio.ini
@@ -17,7 +17,7 @@ build_flags = ${nrf52840_base.build_flags}
 build_src_filter = ${nrf52_base.build_src_filter} +<../variants/nrf52840/rak4631> +<mesh/eth/> +<mesh/api/> +<mqtt/>
 lib_deps = 
   ${nrf52840_base.lib_deps}
-  ${networking_base.lib_deps}
+  ${nrf52_networking_base.lib_deps}
   melopero/Melopero RV3028@^1.1.0
   https://github.com/RAKWireless/RAK13800-W5100S/archive/1.0.2.zip
   rakwireless/RAKwireless NCP5623 RGB LED library@^1.0.2
diff --git a/variants/nrf52840/rak4631_eth_gw/platformio.ini b/variants/nrf52840/rak4631_eth_gw/platformio.ini
index a1c1b4610..79cdb28c7 100644
--- a/variants/nrf52840/rak4631_eth_gw/platformio.ini
+++ b/variants/nrf52840/rak4631_eth_gw/platformio.ini
@@ -24,7 +24,7 @@ build_flags = ${nrf52840_base.build_flags}
   -DMESHTASTIC_EXCLUDE_STOREFORWARD=1
   -DMESHTASTIC_EXCLUDE_CANNEDMESSAGES=1
   -DMESHTASTIC_EXCLUDE_WAYPOINT=1
-build_src_filter = ${nrf52_base.build_src_filter} +<../variants/nrf52840/rak4631_eth_gw> +<mesh/eth/> +<mesh/api/> +<mqtt/>
+build_src_filter = ${nrf52_base.build_src_filter} +<../variants/nrf52840/rak4631_eth_gw> +<mesh/eth/> +<mesh/api/> +<mqtt/> +<serialization/>
 lib_deps = 
   ${nrf52840_base.lib_deps}
   ${networking_base.lib_deps}
diff --git a/variants/nrf52840/rak_wismeshtap/platformio.ini b/variants/nrf52840/rak_wismeshtap/platformio.ini
index f6ee8fd23..adf301537 100644
--- a/variants/nrf52840/rak_wismeshtap/platformio.ini
+++ b/variants/nrf52840/rak_wismeshtap/platformio.ini
@@ -18,7 +18,7 @@ build_flags = ${nrf52840_base.build_flags}
 build_src_filter = ${nrf52_base.build_src_filter} +<../variants/nrf52840/rak_wismeshtap> +<mesh/eth/> +<mesh/api/> +<mqtt/>
 lib_deps = 
   ${nrf52840_base.lib_deps}
-  ${networking_base.lib_deps}
+  ${nrf52_networking_base.lib_deps}
   melopero/Melopero RV3028@^1.1.0
   https://github.com/RAKWireless/RAK13800-W5100S/archive/1.0.2.zip
   rakwireless/RAKwireless NCP5623 RGB LED library@^1.0.2