diff --git a/firmware/esp32-csi-node/sdkconfig.defaults b/firmware/esp32-csi-node/sdkconfig.defaults
index 49c4177a..a7732c19 100644
--- a/firmware/esp32-csi-node/sdkconfig.defaults
+++ b/firmware/esp32-csi-node/sdkconfig.defaults
@@ -31,3 +31,7 @@ CONFIG_LWIP_SO_RCVBUF=y
 
 # FreeRTOS: increase task stack for CSI processing
 CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
+
+# ADR-081: adaptive_controller runs emit_feature_state + stream_sender
+# network I/O inside Timer Svc callbacks, exceeding the 2 KiB default.
+CONFIG_FREERTOS_TIMER_TASK_STACK_DEPTH=8192
diff --git a/firmware/esp32-csi-node/sdkconfig.defaults.4mb b/firmware/esp32-csi-node/sdkconfig.defaults.4mb
index 3a0d1d60..0ef6d26a 100644
--- a/firmware/esp32-csi-node/sdkconfig.defaults.4mb
+++ b/firmware/esp32-csi-node/sdkconfig.defaults.4mb
@@ -27,3 +27,7 @@ CONFIG_LOG_DEFAULT_LEVEL_INFO=y
 
 CONFIG_LWIP_SO_RCVBUF=y
 CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
+
+# ADR-081: adaptive_controller runs emit_feature_state + stream_sender
+# network I/O inside Timer Svc callbacks, exceeding the 2 KiB default.
+CONFIG_FREERTOS_TIMER_TASK_STACK_DEPTH=8192
diff --git a/firmware/esp32-csi-node/sdkconfig.defaults.template b/firmware/esp32-csi-node/sdkconfig.defaults.template
index 49c4177a..a7732c19 100644
--- a/firmware/esp32-csi-node/sdkconfig.defaults.template
+++ b/firmware/esp32-csi-node/sdkconfig.defaults.template
@@ -31,3 +31,7 @@ CONFIG_LWIP_SO_RCVBUF=y
 
 # FreeRTOS: increase task stack for CSI processing
 CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
+
+# ADR-081: adaptive_controller runs emit_feature_state + stream_sender
+# network I/O inside Timer Svc callbacks, exceeding the 2 KiB default.
+CONFIG_FREERTOS_TIMER_TASK_STACK_DEPTH=8192