Merge pull request #25 from rlwilliamson-dev/room-server

app: add Room Server (BBS) role

zephcore/boards/common/room_server.conf

@@ -0,0 +1,19 @@
+# Room server-specific config
+#
+# Build with: -DEXTRA_CONF_FILE="boards/common/room_server.conf"
+#
+# Room servers use USB serial CLI for configuration — no BLE, no bonding, no NUS.
+# This overrides the BLE settings in zephcore_common.conf.
+
+# ========== Role Selection ==========
+CONFIG_ZEPHCORE_ROLE_ROOM_SERVER=y
+
+# ========== Disable BLE entirely ==========
+# Room servers have zero BLE functionality — all config via USB serial CLI.
+# Saves ~100KB flash and ~30KB RAM on nRF52.
+CONFIG_BT=n
+
+# ========== Entropy (required when BT is disabled) ==========
+# BT normally pulls in the entropy subsystem. Without BT, we need it explicitly
+# for Ed25519 key generation, LoRa random delays, etc.
+CONFIG_ENTROPY_GENERATOR=y

zephcore/boards/example_board/README.md

@@ -113,6 +113,14 @@ Append `-- -DEXTRA_CONF_FILE="boards/common/repeater.conf"` to any build command
 west build -b rak4631 zephcore -- -DEXTRA_CONF_FILE="boards/common/repeater.conf"
 ```
 
+### Building for Room Server Role
+
+Append `-- -DEXTRA_CONF_FILE="boards/common/room_server.conf"` to any build command:
+
+```
+west build -b rak4631 zephcore -- -DEXTRA_CONF_FILE="boards/common/room_server.conf"
+```
+
 ### Production Build (logging disabled)
 
 ```