hil: bump net iface enum timeout to 30s for net_lwip_webserver

The CI HIL host repeatedly fails the test with "USB net iface enx... did
not come up with 192.168.7.x within 15s" — USB enumeration + DHCP serve
takes longer there than on the local rig. Bump just this test's timeout
to 30s; other tests stay on the 15s global ENUM_TIMEOUT.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>

1 files changed, 4 insertions, 2 deletions

diff --git a/test/hil/hil_test.py b/test/hil/hil_test.py
index 5f262184e..f39019431 100755
--- a/test/hil/hil_test.py
+++ b/test/hil/hil_test.py
@@ -1064,7 +1064,9 @@ def test_device_net_lwip_webserver(board):
     iperf_port = 5001
 
     # Wait for the host to get an IPv4 address in the device's subnet (DHCP served by the device).
-    deadline = time.time() + ENUM_TIMEOUT
+    # USB enum + DHCP serve can take longer on the CI HIL hardware than on local — give it 30s.
+    iface_timeout = 30
+    deadline = time.time() + iface_timeout
     host_ip = None
     while time.time() < deadline:
         ret = subprocess.run(['ip', '-o', '-4', 'addr', 'show', iface],
@@ -1074,7 +1076,7 @@ def test_device_net_lwip_webserver(board):
             host_ip = m.group(1)
             break
         time.sleep(0.5)
-    assert host_ip, f'USB net iface {iface} did not come up with 192.168.7.x within {ENUM_TIMEOUT}s'
+    assert host_ip, f'USB net iface {iface} did not come up with 192.168.7.x within {iface_timeout}s'
 
     # Poll the iperf TCP port until the device is accepting. The net stack comes up a bit
     # after DHCP completes; iperf server binding isn't instantaneous after reflash.