randomize speed

RemoteIDSpoofer/RemoteIDSpoofer.ino

@@ -1,11 +1,8 @@
 // ESP8266 RemoteID spoofer
 // Heavily adapted from https://github.com/sxjack/uav_electronic_ids
 
-#include <Arduino.h>
-#include <ESP8266WiFi.h>
 #include "spoofer.h"
 
-// we are limited by how fast we can broadcast things
 const int num_spoofers = 16;
 static Spoofer spoofers[num_spoofers];
 

RemoteIDSpoofer/spoofer.cpp

@@ -33,12 +33,10 @@ Spoofer::Spoofer() {
 
   utm_data.alt_msl_m = utm_data.base_alt_m + z;
   utm_data.alt_agl_m = z;
-  utm_data.speed_kn = speed_kn;
+  utm_data.speed_kn = 1;
   utm_data.satellites = 8;
   utm_data.base_valid = 1;
 
-  speed_m_x = ((float) speed_kn) * 0.514444 * 0.2; // Because we update every 200 ms.
-
   utm_utils.calc_m_per_deg(lat_d,&m_deg_lat,&m_deg_long);
 }
 
@@ -48,6 +46,10 @@ void Spoofer::update() {
     return;
   }
 
+  // randomly update the velocity
+  utm_data.speed_kn = constrain(utm_data.speed_kn + (rand() % 5) - 2, 1, 20);
+  speed_m_x = ((float) utm_data.speed_kn) * 0.514444 * 0.2; // Because we update every 200 ms.
+
   // randomly pick a direction to head and update the heading
   float ranf = 0.001 * (float) (((int) rand() % 1000) - 500);
   int dir_change = (int) (max_dir_change * ranf);

RemoteIDSpoofer/spoofer.h

@@ -17,7 +17,6 @@ class Spoofer {
     struct UTM_parameters utm_parameters;
     struct UTM_data utm_data;
 
-    int speed_kn = (int) (rand() % 10);
     float x = 0.0, y = 0.0, z = 0.0;
     float speed_m_x, max_dir_change = 75.0;
     double deg2rad = (4.0 * atan(1.0)) / 180.0;