unify activity detection in PhoneAPI, turn off BLE API while serial API in use

src/SerialConsole.cpp

@@ -1,5 +1,6 @@
 #include "SerialConsole.h"
 #include "configuration.h"
+#include "target_specific.h"
 #include <Arduino.h>
 
 #define Port Serial
@@ -35,3 +36,9 @@ void SerialConsole::handleToRadio(const uint8_t *buf, size_t len)
 
     StreamAPI::handleToRadio(buf, len);
 }
+
+/// Hookable to find out when connection changes
+void SerialConsole::onConnectionChanged(bool connected)
+{
+    setBluetoothEnable(!connected); // To prevent user confusion, turn off bluetooth while using the serial port api
+}

src/SerialConsole.h

@@ -26,6 +26,10 @@ class SerialConsole : public StreamAPI, public RedirectablePrint
             RedirectablePrint::write('\r');
         return RedirectablePrint::write(c);
     }
+
+  protected:
+    /// Hookable to find out when connection changes
+    virtual void onConnectionChanged(bool connected);
 };
 
 extern SerialConsole console;

src/esp32/BluetoothSoftwareUpdate.cpp

@@ -30,8 +30,6 @@ class TotalSizeCharacteristic : public CallbackCharacteristic
 
     void onWrite(BLECharacteristic *c)
     {
-        BLEKeepAliveCallbacks::onWrite(c);
-
         LockGuard g(updateLock);
         // Check if there is enough to OTA Update
         uint32_t len = getValue32(c, 0);
@@ -67,8 +65,6 @@ class DataCharacteristic : public CallbackCharacteristic
 
     void onWrite(BLECharacteristic *c)
     {
-        BLEKeepAliveCallbacks::onWrite(c);
-
         LockGuard g(updateLock);
         std::string value = c->getValue();
         uint32_t len = value.length();
@@ -92,8 +88,6 @@ class CRC32Characteristic : public CallbackCharacteristic
 
     void onWrite(BLECharacteristic *c)
     {
-        BLEKeepAliveCallbacks::onWrite(c);
-
         LockGuard g(updateLock);
         uint32_t expectedCRC = getValue32(c, 0);
         uint32_t actualCRC = crc.finalize();

src/esp32/CallbackCharacteristic.h

@@ -1,33 +1,12 @@
 #pragma once
-#include "PowerFSM.h" // FIXME - someday I want to make this OTA thing a separate lb at at that point it can't touch this
 #include "BLECharacteristic.h"
-
-/**
- * This mixin just lets the power management state machine know the phone is still talking to us
- */
-class BLEKeepAliveCallbacks : public BLECharacteristicCallbacks
-{
-public:
-    void onRead(BLECharacteristic *c)
-    {
-        powerFSM.trigger(EVENT_CONTACT_FROM_PHONE);
-    }
-
-    void onWrite(BLECharacteristic *c)
-    {
-        powerFSM.trigger(EVENT_CONTACT_FROM_PHONE);
-    }
-};
+#include "PowerFSM.h" // FIXME - someday I want to make this OTA thing a separate lb at at that point it can't touch this
 
 /**
  * A characterstic with a set of overridable callbacks
  */
-class CallbackCharacteristic : public BLECharacteristic, public BLEKeepAliveCallbacks
+class CallbackCharacteristic : public BLECharacteristic, public BLECharacteristicCallbacks
 {
-public:
-    CallbackCharacteristic(const char *uuid, uint32_t btprops)
-        : BLECharacteristic(uuid, btprops)
-    {
-        setCallbacks(this);
-    }
+  public:
+    CallbackCharacteristic(const char *uuid, uint32_t btprops) : BLECharacteristic(uuid, btprops) { setCallbacks(this); }
 };

src/esp32/MeshBluetoothService.cpp

@@ -58,17 +58,12 @@ class ProtobufCharacteristic : public CallbackCharacteristic
 
     void onRead(BLECharacteristic *c)
     {
-        BLEKeepAliveCallbacks::onRead(c);
         size_t numbytes = pb_encode_to_bytes(trBytes, sizeof(trBytes), fields, my_struct);
         DEBUG_MSG("pbread from %s returns %d bytes\n", c->getUUID().toString().c_str(), numbytes);
         c->setValue(trBytes, numbytes);
     }
 
-    void onWrite(BLECharacteristic *c)
-    {
-        BLEKeepAliveCallbacks::onWrite(c);
-        writeToDest(c, my_struct);
-    }
+    void onWrite(BLECharacteristic *c) { writeToDest(c, my_struct); }
 
   protected:
     /// like onWrite, but we provide an different destination to write to, for use by subclasses that
@@ -84,7 +79,7 @@ class ProtobufCharacteristic : public CallbackCharacteristic
 };
 
 #ifdef SUPPORT_OLD_BLE_API
-class NodeInfoCharacteristic : public BLECharacteristic, public BLEKeepAliveCallbacks
+class NodeInfoCharacteristic : public BLECharacteristic, public BLECharacteristicCallbacks
 {
   public:
     NodeInfoCharacteristic()
@@ -96,8 +91,6 @@ class NodeInfoCharacteristic : public BLECharacteristic, public BLEKeepAliveCall
 
     void onRead(BLECharacteristic *c)
     {
-        BLEKeepAliveCallbacks::onRead(c);
-
         const NodeInfo *info = nodeDB.readNextInfo();
 
         if (info) {
@@ -113,7 +106,6 @@ class NodeInfoCharacteristic : public BLECharacteristic, public BLEKeepAliveCall
 
     void onWrite(BLECharacteristic *c)
     {
-        BLEKeepAliveCallbacks::onWrite(c);
         DEBUG_MSG("Reset nodeinfo read pointer\n");
         nodeDB.resetReadPointer();
     }
@@ -156,8 +148,7 @@ class OwnerCharacteristic : public ProtobufCharacteristic
 
     void onWrite(BLECharacteristic *c)
     {
-        BLEKeepAliveCallbacks::onWrite(
-            c); // NOTE: We do not call the standard ProtobufCharacteristic superclass, because we want custom write behavior
+        // NOTE: We do not call the standard ProtobufCharacteristic superclass, because we want custom write behavior
 
         static User o; // if the phone doesn't set ID we are careful to keep ours, we also always keep our macaddr
         if (writeToDest(c, &o)) {
@@ -196,7 +187,6 @@ class ToRadioCharacteristic : public CallbackCharacteristic
 
     void onWrite(BLECharacteristic *c)
     {
-        BLEKeepAliveCallbacks::onWrite(c);
         DEBUG_MSG("Got on write\n");
 
         bluetoothPhoneAPI->handleToRadio(c->getData(), c->getValue().length());
@@ -212,7 +202,6 @@ class FromRadioCharacteristic : public CallbackCharacteristic
 
     void onRead(BLECharacteristic *c)
     {
-        BLEKeepAliveCallbacks::onRead(c);
         size_t numBytes = bluetoothPhoneAPI->getFromRadio(trBytes);
 
         // Someone is going to read our value as soon as this callback returns.  So fill it with the next message in the queue
@@ -236,11 +225,7 @@ class FromNumCharacteristic : public CallbackCharacteristic
         // observe(&service.fromNumChanged);
     }
 
-    void onRead(BLECharacteristic *c)
-    {
-        BLEKeepAliveCallbacks::onRead(c);
-        DEBUG_MSG("FIXME implement fromnum read\n");
-    }
+    void onRead(BLECharacteristic *c) { DEBUG_MSG("FIXME implement fromnum read\n"); }
 };
 
 /*

src/mesh/PhoneAPI.cpp

@@ -1,6 +1,7 @@
 #include "PhoneAPI.h"
 #include "MeshService.h"
 #include "NodeDB.h"
+#include "PowerFSM.h"
 #include <assert.h>
 
 PhoneAPI::PhoneAPI()
@@ -14,11 +15,30 @@ void PhoneAPI::init()
     observe(&service.fromNumChanged);
 }
 
+void PhoneAPI::checkConnectionTimeout()
+{
+    if (isConnected) {
+        bool newConnected = (millis() - lastContactMsec < radioConfig.preferences.phone_timeout_secs);
+        if (!newConnected) {
+            isConnected = false;
+            onConnectionChanged(isConnected);
+        }
+    }
+}
+
 /**
  * Handle a ToRadio protobuf
  */
 void PhoneAPI::handleToRadio(const uint8_t *buf, size_t bufLength)
 {
+    powerFSM.trigger(EVENT_CONTACT_FROM_PHONE); // As long as the phone keeps talking to us, don't let the radio go to sleep
+    lastContactMsec = millis();
+    if (!isConnected) {
+        isConnected = true;
+        onConnectionChanged(isConnected);
+    }
+    // return (lastContactMsec != 0) &&
+
     if (pb_decode_from_bytes(buf, bufLength, ToRadio_fields, &toRadioScratch)) {
         switch (toRadioScratch.which_variant) {
         case ToRadio_packet_tag: {
@@ -227,6 +247,8 @@ void PhoneAPI::handleToRadioPacket(MeshPacket *p) {}
 /// If the mesh service tells us fromNum has changed, tell the phone
 int PhoneAPI::onNotify(uint32_t newValue)
 {
+    checkConnectionTimeout(); // a handy place to check if we've heard from the phone (since the BLE version doesn't call this from idle)
+    
     if (state == STATE_SEND_PACKETS || state == STATE_LEGACY) {
         DEBUG_MSG("Telling client we have new packets %u\n", newValue);
         onNowHasData(newValue);

src/mesh/PhoneAPI.h

@@ -50,6 +50,11 @@ class PhoneAPI
     /// Use to ensure that clients don't get confused about old messages from the radio
     uint32_t config_nonce = 0;
 
+    /** the last msec we heard from the client on the other side of this link */
+    uint32_t lastContactMsec = 0;
+
+    bool isConnected = false;
+
   public:
     PhoneAPI();
 
@@ -85,6 +90,12 @@ class PhoneAPI
     /// Our fromradio packet while it is being assembled
     FromRadio fromRadioScratch;
 
+    /// Hookable to find out when connection changes
+    virtual void onConnectionChanged(bool connected) {}
+
+  /// If we haven't heard from the other side in a while then say not connected
+    void checkConnectionTimeout();
+
     /**
      * Subclasses can use this as a hook to provide custom notifications for their transport (i.e. bluetooth notifies)
      */

src/mesh/StreamAPI.cpp

@@ -9,6 +9,7 @@ void StreamAPI::loop()
 {
     writeStream();
     readStream();
+    checkConnectionTimeout();
 }
 
 /**