switched to channel hash for durability

src/mesh/Channels.cpp

@@ -314,6 +314,15 @@ void Channels::setChannel(const meshtastic_Channel &c)
     old = c; // slam in the new settings/role
 }
 
+int8_t Channels::getIndexByHash(ChannelHash channelHash)
+{
+    for (int i = 0; i < getNumChannels(); i++)
+        if (getHash(i) == channelHash)
+            return i;
+
+    return -1;
+}
+
 bool Channels::anyMqttEnabled()
 {
 #if USERPREFS_EVENT_MODE

src/mesh/Channels.h

@@ -92,6 +92,9 @@ class Channels
     // Returns true if any of our channels have enabled MQTT uplink or downlink
     bool anyMqttEnabled();
 
+    /** Return the channel index for the specified channel hash, or -1 for not found */
+    int8_t getIndexByHash(ChannelHash channelHash);
+
   private:
     /** Given a channel index, change to use the crypto key specified by that index
      *
@@ -99,9 +102,6 @@ class Channels
      */
     int16_t setCrypto(ChannelIndex chIndex);
 
-    /** Return the channel index for the specified channel hash, or -1 for not found */
-    int8_t getIndexByHash(ChannelHash channelHash);
-
     /** Given a channel number, return the (0 to 255) hash for that channel
      * If no suitable channel could be found, return -1
      *

src/modules/NodeInfoModule.cpp

@@ -1,6 +1,7 @@
 #include "NodeInfoModule.h"
 #include "Default.h"
 #include "MeshService.h"
+#include "Channels.h"
 #include "NodeDB.h"
 #include "RTC.h"
 #include "Router.h"
@@ -53,10 +54,11 @@ void NodeInfoModule::sendOurNodeInfo(NodeNum dest, bool wantReplies, uint8_t cha
             LOG_DEBUG("Send ourNodeInfo to channel %d", channel);
             p->channel = channel;
         }
-#ifdef USERPREFS_CONFIG_DISCOVERY_CHANNEL
+#ifdef USERPREFS_CONFIG_DISCOVERY_CHANNEL_HASH
         // If this is a broadcast over the default channel, we can safely change this to the discovery channel if defined
         if (dest == NODENUM_BROADCAST && channel == 0) {
-            p->channel = USERPREFS_CONFIG_DISCOVERY_CHANNEL;
+            int8_t discoveryChannelIdx = channels.getIndexByHash((ChannelHash)USERPREFS_CONFIG_DISCOVERY_CHANNEL_HASH);
+            p->channel = discoveryChannelIdx > 0 ? discoveryChannelIdx : 0;
         }
 #endif
 

src/modules/PositionModule.cpp

@@ -317,7 +317,7 @@ void PositionModule::sendOurPosition()
     LOG_INFO("Send pos@%x:6 to mesh (wantReplies=%d)", localPosition.timestamp, requestReplies);
     sendOurPosition(NODENUM_BROADCAST, requestReplies);
 
-#ifdef USERPREFS_CONFIG_DISCOVERY_CHANNEL
+#ifdef USERPREFS_CONFIG_DISCOVERY_CHANNEL_HASH
     // If the user wants discovery on a different channel, send only nodeinfo to that channel
     // sendOurNodeInfo() will automatically handle routing a nodeinfo packet to the correct channel
     assert(nodeInfoModule);