show real distances between nodes

TODO.md

@@ -4,7 +4,6 @@
 * make debug info screen show real data (including battery level & charging)
 * update build to generate both board types
 * retest BLE software update for both board types
-* turn on screen when a new update arrives
 * don't forward redundent pings or ping responses to the phone, it just wastes phone battery
 
 # Medium priority

src/MeshRadio.cpp

@@ -167,16 +167,15 @@ static int16_t packetnum = 0;  // packet counter, we increment per xmission
 #endif
 
   /// A temporary buffer used for sending/receving packets, sized to hold the biggest buffer we might need
-  static uint8_t radiobuf[SubPacket_size];
+  #define MAX_RHPACKETLEN 251
+  static uint8_t radiobuf[MAX_RHPACKETLEN];
   uint8_t rxlen;
   uint8_t srcaddr, destaddr, id, flags;
 
-  assert(SubPacket_size < 251); // a hard limit from the radio stack (including 4 bytes of headers)
-
   // Poll to see if we've received a packet
   //   if (manager.recvfromAckTimeout(radiobuf, &rxlen, 0, &srcaddr, &destaddr, &id, &flags))
   // prefill rxlen with the max length we can accept - very important
-  rxlen = sizeof(radiobuf);
+  rxlen = (uint8_t) MAX_RHPACKETLEN;
   if (manager.recvfrom(radiobuf, &rxlen, &srcaddr, &destaddr, &id, &flags))
   {
     // We received a packet

src/configuration.h

@@ -41,8 +41,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // Select which board is being used. If the outside build environment has sent a choice, just use that
 #if !defined(T_BEAM_V10) && !defined(HELTEC_LORA32)
-#define T_BEAM_V10  // AKA Rev1 (second board released)
+//#define T_BEAM_V10  // AKA Rev1 (second board released)
-//#define HELTEC_LORA32
+#define HELTEC_LORA32
 #endif
 
 // If we are using the JTAG port for debugging, some pins must be left free for that (and things like GPS have to be disabled)

src/mesh.pb.c

@@ -9,16 +9,16 @@
 PB_BIND(Position, Position, AUTO)
 
 
-PB_BIND(Data, Data, AUTO)
+PB_BIND(Data, Data, 2)
 
 
 PB_BIND(User, User, AUTO)
 
 
-PB_BIND(SubPacket, SubPacket, AUTO)
+PB_BIND(SubPacket, SubPacket, 2)
 
 
-PB_BIND(MeshPacket, MeshPacket, AUTO)
+PB_BIND(MeshPacket, MeshPacket, 2)
 
 
 PB_BIND(ChannelSettings, ChannelSettings, AUTO)
@@ -39,10 +39,10 @@ PB_BIND(MyNodeInfo, MyNodeInfo, AUTO)
 PB_BIND(DeviceState, DeviceState, 4)
 
 
-PB_BIND(FromRadio, FromRadio, AUTO)
+PB_BIND(FromRadio, FromRadio, 2)
 
 
-PB_BIND(ToRadio, ToRadio, AUTO)
+PB_BIND(ToRadio, ToRadio, 2)
 
 
 

src/mesh.pb.h

@@ -34,8 +34,8 @@ typedef enum _ChannelSettings_ModemConfig {
 
 typedef enum _DeviceState_Version {
     DeviceState_Version_Unset = 0,
-    DeviceState_Version_Minimum = 11,
+    DeviceState_Version_Minimum = 12,
-    DeviceState_Version_Current = 11
+    DeviceState_Version_Current = 12
 } DeviceState_Version;
 
 /* Struct definitions */
@@ -47,7 +47,7 @@ typedef struct _ChannelSettings {
     char name[12];
 } ChannelSettings;
 
-typedef PB_BYTES_ARRAY_T(200) Data_payload_t;
+typedef PB_BYTES_ARRAY_T(251) Data_payload_t;
 typedef struct _Data {
     Data_Type typ;
     Data_payload_t payload;
@@ -389,18 +389,18 @@ extern const pb_msgdesc_t ToRadio_msg;
 
 /* Maximum encoded size of messages (where known) */
 #define Position_size                            42
-#define Data_size                                205
+#define Data_size                                256
 #define User_size                                72
-#define SubPacket_size                           208
+#define SubPacket_size                           259
-#define MeshPacket_size                          239
+#define MeshPacket_size                          290
 #define ChannelSettings_size                     50
 #define RadioConfig_size                         72
 #define RadioConfig_UserPreferences_size         18
 #define NodeInfo_size                            157
 #define MyNodeInfo_size                          13
-#define DeviceState_size                         13271
+#define DeviceState_size                         14954
-#define FromRadio_size                           248
+#define FromRadio_size                           299
-#define ToRadio_size                             242
+#define ToRadio_size                             293
 
 #ifdef __cplusplus
 } /* extern "C" */

src/screen.cpp

@@ -196,6 +196,28 @@ uint32_t drawRows(OLEDDisplay *display, int16_t x, int16_t y, const char **field
     return yo;
 }
 
+/// Ported from my old java code, returns distance in meters along the globe surface (by magic?)
+float latLongToMeter(double lat_a, double lng_a, double lat_b, double lng_b)
+{
+    double pk = (180 / 3.14169);
+    double a1 = lat_a / pk;
+    double a2 = lng_a / pk;
+    double b1 = lat_b / pk;
+    double b2 = lng_b / pk;
+    double cos_b1 = cos(b1);
+    double cos_a1 = cos(a1);
+    double t1 =
+        cos_a1 * cos(a2) * cos_b1 * cos(b2);
+    double t2 =
+        cos_a1 * sin(a2) * cos_b1 * sin(b2);
+    double t3 = sin(a1) * sin(b1);
+    double tt = acos(t1 + t2 + t3);
+    if (isnan(tt))
+        tt = 0.0; // Must have been the same point?
+
+    return (float)(6366000 * tt);
+}
+
 /// A basic 2D point class for drawing
 class Point
 {
@@ -277,9 +299,22 @@ void drawNodeInfo(OLEDDisplay *display, OLEDDisplayUiState *state, int16_t x, in
     else
         snprintf(lastStr, sizeof(lastStr), "%d hours ago", agoSecs / 60 / 60);
 
+    static char distStr[20];
+    *distStr = 0; // might not have location data
+    NodeInfo *ourNode = nodeDB.getNode(nodeDB.getNodeNum());
+    if (ourNode && ourNode->has_position && node->has_position)
+    {
+        Position &op = ourNode->position, &p = node->position;
+        float d = latLongToMeter(p.latitude, p.longitude, op.latitude, op.longitude);
+        if (d < 2000)
+            snprintf(distStr, sizeof(distStr), "%.0f m", d);
+        else
+            snprintf(distStr, sizeof(distStr), "%.1f km", d / 1000);
+    }
+
     const char *fields[] = {
         username,
-        "2.1 mi",
+        distStr,
         signalStr,
         lastStr,
         NULL};
@@ -549,7 +584,7 @@ void screen_set_frames()
     size_t numframes = 0;
 
     // If we have a text message - show it first
-    if(devicestate.has_rx_text_message)
+    if (devicestate.has_rx_text_message)
         nonBootFrames[numframes++] = drawTextMessageFrame;
 
     // then all the nodes