From b428ecf31ff1d80d29129684b8e0e9f48248d864 Mon Sep 17 00:00:00 2001
From: Scott Powell <sqij@protonmail.com>
Date: Wed, 5 Feb 2025 12:36:32 +1100
Subject: [PATCH] * new CLI command: "set txdelay ..."

---
 examples/simple_repeater/main.cpp    | 16 ++++++++++++++++
 examples/simple_room_server/main.cpp | 16 ++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/examples/simple_repeater/main.cpp b/examples/simple_repeater/main.cpp
index 816417ac..6a7f555c 100644
--- a/examples/simple_repeater/main.cpp
+++ b/examples/simple_repeater/main.cpp
@@ -123,6 +123,7 @@ struct NodePrefs {  // persisted to file
   uint8_t disable_fwd;
   uint8_t unused[2];
   float rx_delay_base;
+  float tx_delay_factor;
 };
 
 class MyMesh : public mesh::Mesh {
@@ -199,6 +200,11 @@ protected:
     return (int) ((pow(_prefs.rx_delay_base, 0.85f - score) - 1.0) * air_time);
   }
 
+  uint32_t getRetransmitDelay(const mesh::Packet* packet) override {
+    uint32_t t = (_radio->getEstAirtimeFor(packet->path_len + packet->payload_len + 2) * _prefs.tx_delay_factor);
+    return getRNG()->nextInt(0, 6)*t;
+  }
+
   void onAnonDataRecv(mesh::Packet* packet, uint8_t type, const mesh::Identity& sender, uint8_t* data, size_t len) override {
     if (type == PAYLOAD_TYPE_ANON_REQ) {  // received an initial request by a possible admin client (unknown at this stage)
       uint32_t timestamp;
@@ -379,6 +385,7 @@ public:
     memset(&_prefs, 0, sizeof(_prefs));
     _prefs.airtime_factor = 1.0;    // one half
     _prefs.rx_delay_base = 10.0;
+    _prefs.tx_delay_factor = 0.25f;
     strncpy(_prefs.node_name, ADVERT_NAME, sizeof(_prefs.node_name)-1);
     _prefs.node_name[sizeof(_prefs.node_name)-1] = 0;  // truncate if necessary
     _prefs.node_lat = ADVERT_LAT;
@@ -507,6 +514,15 @@ public:
         } else {
           strcpy(reply, "Error, cannot be negative");
         }
+      } else if (memcmp(config, "txdelay ", 8) == 0) {
+        float f = atof(&config[8]);
+        if (f >= 0) {
+          _prefs.tx_delay_factor = f;
+          savePrefs();
+          strcpy(reply, "OK");
+        } else {
+          strcpy(reply, "Error, cannot be negative");
+        }
       } else if (memcmp(config, "tx ", 3) == 0) {
         _prefs.tx_power_dbm = atoi(&config[3]);
         savePrefs();
diff --git a/examples/simple_room_server/main.cpp b/examples/simple_room_server/main.cpp
index c3a775d5..2a88bddd 100644
--- a/examples/simple_room_server/main.cpp
+++ b/examples/simple_room_server/main.cpp
@@ -140,6 +140,7 @@ struct NodePrefs {  // persisted to file
   uint8_t disable_fwd;
   uint8_t unused[2];
   float rx_delay_base;
+  float tx_delay_factor;
 };
 
 class MyMesh : public mesh::Mesh {
@@ -253,6 +254,11 @@ protected:
     return (int) ((pow(_prefs.rx_delay_base, 0.85f - score) - 1.0) * air_time);
   }
 
+  uint32_t getRetransmitDelay(const mesh::Packet* packet) override {
+    uint32_t t = (_radio->getEstAirtimeFor(packet->path_len + packet->payload_len + 2) * _prefs.tx_delay_factor);
+    return getRNG()->nextInt(0, 6)*t;
+  }
+
   bool allowPacketForward(const mesh::Packet* packet) override {
     return !_prefs.disable_fwd;
   }
@@ -491,6 +497,7 @@ public:
     memset(&_prefs, 0, sizeof(_prefs));
     _prefs.airtime_factor = 1.0;    // one half
     _prefs.rx_delay_base = 10.0;
+    _prefs.tx_delay_factor = 0.25f;
     strncpy(_prefs.node_name, ADVERT_NAME, sizeof(_prefs.node_name)-1);
     _prefs.node_name[sizeof(_prefs.node_name)-1] = 0;  // truncate if necessary
     _prefs.node_lat = ADVERT_LAT;
@@ -626,6 +633,15 @@ public:
         } else {
           strcpy(reply, "Error, cannot be negative");
         }
+      } else if (memcmp(config, "txdelay ", 8) == 0) {
+        float f = atof(&config[8]);
+        if (f >= 0) {
+          _prefs.tx_delay_factor = f;
+          savePrefs();
+          strcpy(reply, "OK");
+        } else {
+          strcpy(reply, "Error, cannot be negative");
+        }
       } else if (memcmp(config, "tx ", 3) == 0) {
         _prefs.tx_power_dbm = atoi(&config[3]);
         savePrefs();