Threshold based smart position broadcasts

src/mesh/NodeDB.cpp

@@ -165,6 +165,8 @@ void NodeDB::installDefaultConfig()
     config.lora.hop_limit = HOP_RELIABLE;
     config.position.gps_enabled = true;
     config.position.position_broadcast_smart_enabled = true;
+    config.position.broadcast_smart_minimum_distance = 100;
+    config.position.broadcast_smart_minimum_interval_secs = 30;
     if (config.device.role != meshtastic_Config_DeviceConfig_Role_ROUTER)
         config.device.node_info_broadcast_secs = 3 * 60 * 60;
     config.device.serial_enabled = true;
@@ -231,9 +233,7 @@ void NodeDB::installRoleDefaults(meshtastic_Config_DeviceConfig_Role role)
     } else if (role == meshtastic_Config_DeviceConfig_Role_REPEATER) {
         config.display.screen_on_secs = 1;
     } else if (role == meshtastic_Config_DeviceConfig_Role_TRACKER) {
-        config.position.position_broadcast_smart_enabled = false;
-        config.position.position_broadcast_secs = 120;
-        config.position.gps_update_interval = 60;
+        config.position.gps_update_interval = 30;
     } else if (role == meshtastic_Config_DeviceConfig_Role_SENSOR) {
         moduleConfig.telemetry.environment_measurement_enabled = true;
         moduleConfig.telemetry.environment_update_interval = 300;

src/mesh/generated/meshtastic/config.pb.h

@@ -262,6 +262,10 @@ typedef struct _meshtastic_Config_PositionConfig {
     uint32_t rx_gpio;
     /* (Re)define GPS_TX_PIN for your board. */
     uint32_t tx_gpio;
+    /* The minimum distance in meters traveled (since the last send) before we can send a position to the mesh if position_broadcast_smart_enabled */
+    uint32_t broadcast_smart_minimum_distance;
+    /* The minumum number of seconds (since the last send) before we can send a position to the mesh if position_broadcast_smart_enabled */
+    uint32_t broadcast_smart_minimum_interval_secs;
 } meshtastic_Config_PositionConfig;
 
 /* Power Config\
@@ -524,7 +528,7 @@ extern "C" {
 /* Initializer values for message structs */
 #define meshtastic_Config_init_default           {0, {meshtastic_Config_DeviceConfig_init_default}}
 #define meshtastic_Config_DeviceConfig_init_default {_meshtastic_Config_DeviceConfig_Role_MIN, 0, 0, 0, 0, _meshtastic_Config_DeviceConfig_RebroadcastMode_MIN, 0}
-#define meshtastic_Config_PositionConfig_init_default {0, 0, 0, 0, 0, 0, 0, 0, 0}
+#define meshtastic_Config_PositionConfig_init_default {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
 #define meshtastic_Config_PowerConfig_init_default {0, 0, 0, 0, 0, 0, 0, 0}
 #define meshtastic_Config_NetworkConfig_init_default {0, "", "", "", 0, _meshtastic_Config_NetworkConfig_AddressMode_MIN, false, meshtastic_Config_NetworkConfig_IpV4Config_init_default, ""}
 #define meshtastic_Config_NetworkConfig_IpV4Config_init_default {0, 0, 0, 0}
@@ -533,7 +537,7 @@ extern "C" {
 #define meshtastic_Config_BluetoothConfig_init_default {0, _meshtastic_Config_BluetoothConfig_PairingMode_MIN, 0}
 #define meshtastic_Config_init_zero              {0, {meshtastic_Config_DeviceConfig_init_zero}}
 #define meshtastic_Config_DeviceConfig_init_zero {_meshtastic_Config_DeviceConfig_Role_MIN, 0, 0, 0, 0, _meshtastic_Config_DeviceConfig_RebroadcastMode_MIN, 0}
-#define meshtastic_Config_PositionConfig_init_zero {0, 0, 0, 0, 0, 0, 0, 0, 0}
+#define meshtastic_Config_PositionConfig_init_zero {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
 #define meshtastic_Config_PowerConfig_init_zero  {0, 0, 0, 0, 0, 0, 0, 0}
 #define meshtastic_Config_NetworkConfig_init_zero {0, "", "", "", 0, _meshtastic_Config_NetworkConfig_AddressMode_MIN, false, meshtastic_Config_NetworkConfig_IpV4Config_init_zero, ""}
 #define meshtastic_Config_NetworkConfig_IpV4Config_init_zero {0, 0, 0, 0}
@@ -558,6 +562,8 @@ extern "C" {
 #define meshtastic_Config_PositionConfig_position_flags_tag 7
 #define meshtastic_Config_PositionConfig_rx_gpio_tag 8
 #define meshtastic_Config_PositionConfig_tx_gpio_tag 9
+#define meshtastic_Config_PositionConfig_broadcast_smart_minimum_distance_tag 10
+#define meshtastic_Config_PositionConfig_broadcast_smart_minimum_interval_secs_tag 11
 #define meshtastic_Config_PowerConfig_is_power_saving_tag 1
 #define meshtastic_Config_PowerConfig_on_battery_shutdown_after_secs_tag 2
 #define meshtastic_Config_PowerConfig_adc_multiplier_override_tag 3
@@ -653,7 +659,9 @@ X(a, STATIC,   SINGULAR, UINT32,   gps_update_interval,   5) \
 X(a, STATIC,   SINGULAR, UINT32,   gps_attempt_time,   6) \
 X(a, STATIC,   SINGULAR, UINT32,   position_flags,    7) \
 X(a, STATIC,   SINGULAR, UINT32,   rx_gpio,           8) \
-X(a, STATIC,   SINGULAR, UINT32,   tx_gpio,           9)
+X(a, STATIC,   SINGULAR, UINT32,   tx_gpio,           9) \
+X(a, STATIC,   SINGULAR, UINT32,   broadcast_smart_minimum_distance,  10) \
+X(a, STATIC,   SINGULAR, UINT32,   broadcast_smart_minimum_interval_secs,  11)
 #define meshtastic_Config_PositionConfig_CALLBACK NULL
 #define meshtastic_Config_PositionConfig_DEFAULT NULL
 
@@ -758,7 +766,7 @@ extern const pb_msgdesc_t meshtastic_Config_BluetoothConfig_msg;
 #define meshtastic_Config_LoRaConfig_size        77
 #define meshtastic_Config_NetworkConfig_IpV4Config_size 20
 #define meshtastic_Config_NetworkConfig_size     195
-#define meshtastic_Config_PositionConfig_size    42
+#define meshtastic_Config_PositionConfig_size    54
 #define meshtastic_Config_PowerConfig_size       43
 #define meshtastic_Config_size                   198
 

src/mesh/generated/meshtastic/deviceonly.pb.h

@@ -188,7 +188,7 @@ extern const pb_msgdesc_t meshtastic_OEMStore_msg;
 /* Maximum encoded size of messages (where known) */
 #define meshtastic_ChannelFile_size              638
 #define meshtastic_DeviceState_size              22040
-#define meshtastic_OEMStore_size                 3008
+#define meshtastic_OEMStore_size                 3020
 
 #ifdef __cplusplus
 } /* extern "C" */

src/mesh/generated/meshtastic/localonly.pb.h

@@ -156,7 +156,7 @@ extern const pb_msgdesc_t meshtastic_LocalModuleConfig_msg;
 #define meshtastic_LocalModuleConfig_fields &meshtastic_LocalModuleConfig_msg
 
 /* Maximum encoded size of messages (where known) */
-#define meshtastic_LocalConfig_size              442
+#define meshtastic_LocalConfig_size              454
 #define meshtastic_LocalModuleConfig_size        420
 
 #ifdef __cplusplus

src/modules/PositionModule.cpp

@@ -144,10 +144,10 @@ int32_t PositionModule::runOnce()
 
     // We limit our GPS broadcasts to a max rate
     uint32_t now = millis();
-    uint32_t intervalMs = config.position.position_broadcast_secs > 0 ? config.position.position_broadcast_secs * 1000
-                                                                      : default_broadcast_interval_secs * 1000;
-    if (lastGpsSend == 0 || (now - lastGpsSend) >= intervalMs) {
+    uint32_t intervalMs = getConfiguredOrDefaultMs(config.position.position_broadcast_secs, default_broadcast_interval_secs);
+    uint32_t msSinceLastSend = now - lastGpsSend;
 
+    if (lastGpsSend == 0 || msSinceLastSend >= intervalMs) {
         // Only send packets if the channel is less than 40% utilized.
         if (airTime->isTxAllowedChannelUtil()) {
             if (node->has_position && (node->position.latitude_i != 0 || node->position.longitude_i != 0)) {
@@ -165,39 +165,32 @@ int32_t PositionModule::runOnce()
             }
         }
     } else if (config.position.position_broadcast_smart_enabled) {
-
-        // Only send packets if the channel is less than 25% utilized.
-        if (airTime->isTxAllowedChannelUtil(true)) {
-
+        // Only send packets if the channel is less than 25% utilized or we're a tracker.
+        if (airTime->isTxAllowedChannelUtil(config.device.role != meshtastic_Config_DeviceConfig_Role_TRACKER)) {
             meshtastic_NodeInfo *node2 = service.refreshMyNodeInfo(); // should guarantee there is now a position
 
             if (node2->has_position && (node2->position.latitude_i != 0 || node2->position.longitude_i != 0)) {
                 // The minimum distance to travel before we are able to send a new position packet.
-                const uint32_t distanceTravelMinimum = 30;
+                const uint32_t distanceTravelThreshold =
+                    config.position.broadcast_smart_minimum_distance > 0 ? config.position.broadcast_smart_minimum_distance : 100;
 
-                // The minimum time that would pass before we are able to send a new position packet.
-                const uint32_t timeTravelMinimum = 30;
+                // The minimum time (in seconds) that would pass before we are able to send a new position packet.
+                const uint32_t minimumTimeThreshold =
+                    getConfiguredOrDefaultMs(config.position.broadcast_smart_minimum_interval_secs, 30);
 
                 // Determine the distance in meters between two points on the globe
-                float distance = GeoCoord::latLongToMeter(lastGpsLatitude * 1e-7, lastGpsLongitude * 1e-7,
-                                                          node->position.latitude_i * 1e-7, node->position.longitude_i * 1e-7);
-
-                // Yes, this has a bunch of magic numbers. Sorry. This is to make the scale non-linear.
-                const float distanceTravelMath = 1203 / (sqrt(pow(myNodeInfo.bitrate, 1.5) / 1.1));
-                uint32_t distanceTravelThreshold =
-                    (distanceTravelMath >= distanceTravelMinimum) ? distanceTravelMath : distanceTravelMinimum;
-
-                // Yes, this has a bunch of magic numbers. Sorry.
-                uint32_t timeTravel =
-                    ((1500 / myNodeInfo.bitrate) >= timeTravelMinimum) ? (1500 / myNodeInfo.bitrate) : timeTravelMinimum;
-                // If the distance traveled since the last update is greater than distanceTravelMinimum meters
-                //   and it's been at least timeTravelMinimum seconds since the last update
-                if ((abs(distance) >= distanceTravelThreshold) && (now - lastGpsSend) >= (timeTravel * 1000)) {
+                float distanceTraveledSinceLastSend =
+                    GeoCoord::latLongToMeter(lastGpsLatitude * 1e-7, lastGpsLongitude * 1e-7, node->position.latitude_i * 1e-7,
+                                             node->position.longitude_i * 1e-7);
+
+                if ((abs(distanceTraveledSinceLastSend) >= distanceTravelThreshold) && msSinceLastSend >= minimumTimeThreshold) {
                     bool requestReplies = currentGeneration != radioGeneration;
                     currentGeneration = radioGeneration;
 
-                    LOG_INFO("Sending smart pos@%x:6 to mesh (wantReplies=%d, d=%d, dtt=%d, tt=%d)\n", node2->position.timestamp,
-                             requestReplies, distance, distanceTravelThreshold, timeTravel);
+                    LOG_INFO("Sending smart pos@%x:6 to mesh (distanceTraveled=%fm, minDistanceThreshold=%im, timeElapsed=%ims, "
+                             "minTimeInterval=%ims)\n",
+                             node2->position.timestamp, abs(distanceTraveledSinceLastSend), distanceTravelThreshold,
+                             msSinceLastSend, minimumTimeThreshold);
                     sendOurPosition(NODENUM_BROADCAST, requestReplies);
 
                     // Set the current coords as our last ones, after we've compared distance with current and decided to send