diff --git a/firmware/main/c6_slave.bin b/firmware/main/c6_slave.bin
index 14568f3..a606cf1 100644
Binary files a/firmware/main/c6_slave.bin and b/firmware/main/c6_slave.bin differ
diff --git a/firmware/main/net.c b/firmware/main/net.c
index e9a8db2..ef3006d 100644
--- a/firmware/main/net.c
+++ b/firmware/main/net.c
@@ -21,14 +21,14 @@ static volatile bool s_got_ip;
 static void start_ping_diag(void);
 static void ping_diag_task(void *arg);
 
-/* Router DHCP has been observed to go silent for this MAC (flap throttling).
- * After 15 s without a lease, claim the previously granted address statically. */
+/* Fully static addressing: every observed SDIO wedge (~300 s uptime) coincides
+ * with the DHCP T1 renewal window, so the DHCP client stays out of the picture. */
 static void static_ip_fallback(void *arg)
 {
     (void)arg;
-    vTaskDelay(pdMS_TO_TICKS(15000));
+    vTaskDelay(pdMS_TO_TICKS(1000));
     if (!s_got_ip) {
-        ESP_LOGW(TAG, "no DHCP lease after 15s — falling back to static 192.168.86.53");
+        ESP_LOGI(TAG, "static addressing: 192.168.86.53 (DHCP client disabled)");
         esp_netif_dhcpc_stop(s_netif);
         esp_netif_ip_info_t ip = { 0 };
         ip.ip.addr = esp_ip4addr_aton("192.168.86.53");