From 74cfb9800408c1f65c139321d55f6a40d7a6056a Mon Sep 17 00:00:00 2001
From: Mathew Saju <mathewsaju210@gmail.com>
Date: Mon, 16 Mar 2026 15:32:21 +0530
Subject: [PATCH] fix(led): Explicitly disable onboard WS2812 LED during CSI
 collection

---
 firmware/esp32-csi-node/main/idf_component.yml |  3 +++
 firmware/esp32-csi-node/main/main.c            | 18 ++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/firmware/esp32-csi-node/main/idf_component.yml b/firmware/esp32-csi-node/main/idf_component.yml
index 7c52a6f42..4ec1d552a 100644
--- a/firmware/esp32-csi-node/main/idf_component.yml
+++ b/firmware/esp32-csi-node/main/idf_component.yml
@@ -8,3 +8,6 @@ dependencies:
 
   ## LCD touch abstraction
   espressif/esp_lcd_touch: "^1.0"
+
+  ## Onboard WS2812 LED Disabling
+  espressif/led_strip: "^3.0.0"
diff --git a/firmware/esp32-csi-node/main/main.c b/firmware/esp32-csi-node/main/main.c
index b42709430..33fd2515e 100644
--- a/firmware/esp32-csi-node/main/main.c
+++ b/firmware/esp32-csi-node/main/main.c
@@ -17,6 +17,7 @@
 #include "esp_log.h"
 #include "nvs_flash.h"
 #include "sdkconfig.h"
+#include "led_strip.h"
 
 #include "csi_collector.h"
 #include "stream_sender.h"
@@ -138,6 +139,23 @@ void app_main(void)
 
     ESP_LOGI(TAG, "ESP32-S3 CSI Node (ADR-018) — Node ID: %d", g_nvs_config.node_id);
 
+    /* Turn off onboard WS2812 LED on GPIO 38 */
+    led_strip_handle_t led_strip;
+    led_strip_config_t strip_config = {
+        .strip_gpio_num = 38,
+        .max_leds = 1,
+        .led_model = LED_MODEL_WS2812,
+        .color_component_format = LED_STRIP_COLOR_COMPONENT_FMT_GRB,
+        .flags.invert_out = false,
+    };
+    led_strip_rmt_config_t rmt_config = {
+        .resolution_hz = 10 * 1000 * 1000, // 10MHz
+        .flags.with_dma = false,
+    };
+    if (led_strip_new_rmt_device(&strip_config, &rmt_config, &led_strip) == ESP_OK) {
+        led_strip_clear(led_strip);
+    }
+
     /* Initialize WiFi STA (skip entirely under QEMU mock — no RF hardware) */
 #ifndef CONFIG_CSI_MOCK_SKIP_WIFI_CONNECT
     wifi_init_sta();