Wireless Paper: Fix BLE after Lightsleep (#3629)

* NimBLE deinit for deep-sleep only

* Optionally disable blink during light-sleep

* Advised to revert "blink disable"
This reverts commit 66347ce19b.

src/nimble/NimbleBluetooth.cpp

@@ -112,12 +112,12 @@ void NimbleBluetooth::shutdown()
     NimBLEAdvertising *pAdvertising = NimBLEDevice::getAdvertising();
     pAdvertising->reset();
     pAdvertising->stop();
+}
 
-#if defined(HELTEC_WIRELESS_PAPER) || defined(HELTEC_WIRELESS_PAPER_V1_0)
-    // Saving of ~1mA
-    // Probably applicable to other ESP32 boards - unverified
+// Extra power-saving on some devices
+void NimbleBluetooth::deinit()
+{
     NimBLEDevice::deinit();
-#endif
 }
 
 bool NimbleBluetooth::isActive()

src/nimble/NimbleBluetooth.h

@@ -6,6 +6,7 @@ class NimbleBluetooth : BluetoothApi
   public:
     void setup();
     void shutdown();
+    void deinit();
     void clearBonds();
     bool isActive();
     bool isConnected();

src/sleep.cpp

@@ -206,6 +206,12 @@ void doDeepSleep(uint32_t msecToWake, bool skipPreflight = false)
     // not using wifi yet, but once we are this is needed to shutoff the radio hw
     // esp_wifi_stop();
     waitEnterSleep(skipPreflight);
+
+#ifdef NIMBLE_DEINIT_FOR_DEEPSLEEP
+    // Extra power saving on some devices
+    nimbleBluetooth->deinit();
+#endif
+
 #ifdef ARCH_ESP32
     if (shouldLoraWake(msecToWake)) {
         notifySleep.notifyObservers(NULL);

variants/heltec_wireless_paper/variant.h

@@ -55,3 +55,6 @@
 
 #define SX126X_DIO2_AS_RF_SWITCH
 #define SX126X_DIO3_TCXO_VOLTAGE 1.8
+
+// Power management
+#define NIMBLE_DEINIT_FOR_DEEPSLEEP // Required to reach manufacturers claim of 18uA

variants/heltec_wireless_paper_v1/variant.h

@@ -55,3 +55,6 @@
 
 #define SX126X_DIO2_AS_RF_SWITCH
 #define SX126X_DIO3_TCXO_VOLTAGE 1.8
+
+// Power management
+#define NIMBLE_DEINIT_FOR_DEEPSLEEP // Required to reach manufacturers claim of 18uA