diff --git a/variants/heltec_v3/platformio.ini b/variants/heltec_v3/platformio.ini
index 8f9b1a27..173be80c 100644
--- a/variants/heltec_v3/platformio.ini
+++ b/variants/heltec_v3/platformio.ini
@@ -47,6 +47,9 @@ build_flags =
   -D ADVERT_LON=0.0
   -D ADMIN_PASSWORD='"password"'
   -D MAX_NEIGHBOURS=8
+;  -D BRIDGE_OVER_SERIAL=Serial2
+;  -D BRIDGE_OVER_SERIAL_RX=5
+;  -D BRIDGE_OVER_SERIAL_TX=6
 ;  -D MESH_PACKET_LOGGING=1
 ;  -D MESH_DEBUG=1
 build_src_filter = ${Heltec_lora32_v3.build_src_filter}
diff --git a/variants/lilygo_tlora_v2_1/platformio.ini b/variants/lilygo_tlora_v2_1/platformio.ini
index d9cecfc2..bd351c5a 100644
--- a/variants/lilygo_tlora_v2_1/platformio.ini
+++ b/variants/lilygo_tlora_v2_1/platformio.ini
@@ -44,6 +44,9 @@ build_flags =
   -D ADVERT_LON=0.0
   -D ADMIN_PASSWORD='"password"'
   -D MAX_NEIGHBOURS=8
+;  -D BRIDGE_OVER_SERIAL=Serial2
+;  -D BRIDGE_OVER_SERIAL_RX=34
+;  -D BRIDGE_OVER_SERIAL_TX=25
 ;  -D MESH_PACKET_LOGGING=1
 ;  -D MESH_DEBUG=1
 ;  -D CORE_DEBUG_LEVEL=3
diff --git a/variants/waveshare_rp2040_lora/platformio.ini b/variants/waveshare_rp2040_lora/platformio.ini
index 2730734d..b1e4714a 100644
--- a/variants/waveshare_rp2040_lora/platformio.ini
+++ b/variants/waveshare_rp2040_lora/platformio.ini
@@ -35,6 +35,9 @@ build_flags = ${waveshare_rp2040_lora.build_flags}
   -D ADVERT_LON=0.0
   -D ADMIN_PASSWORD='"password"'
   -D MAX_NEIGHBOURS=8
+;  -D BRIDGE_OVER_SERIAL=Serial2
+;  -D BRIDGE_OVER_SERIAL_RX=9
+;  -D BRIDGE_OVER_SERIAL_TX=8
 ;  -D MESH_PACKET_LOGGING=1
 ;  -D MESH_DEBUG=1
 build_src_filter = ${waveshare_rp2040_lora.build_src_filter}