Add primary/secondary role for multi-instance setup

wfb_ng/conf/master.cfg

@@ -19,6 +19,7 @@ debug = False
 version = '0.0.1.trunk'
 commit = None
 
+primary = True            # Set to False if you use several wfb instances on one card. Only primary instance will set radio channel.
 log_file = None           # Set to "wifibroadcast.log" to disable log to stdout
 link_id = "default"       # It will be hashed and mapped to three bytes of MAC
                           # You can use different link ids for multi-vehicle setup without stream remapping.

wfb_ng/server.py

@@ -264,6 +264,10 @@ def init_wlans(profile, wlans):
     else:
         raise Exception('Unsupported bandwith %d MHz' % (max_bw,))
 
+    if not settings.common.primary:
+        log.msg('Skip card init due to secondary role')
+        return
+
     try:
         yield call_and_check_rc('iw', 'reg', 'set', settings.common.wifi_region)
         for wlan in wlans: