Merge pull request #3545 from todd-herbert/paper-deepsleep-current

Reduce deep-sleep current for Heltec Wireless Paper
meshtastic · Apr 4, 2024 · f0b6ff9 · f0b6ff9
2 parents 46ad4bf + 30ebb6a
commit f0b6ff9
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diff --git a/src/nimble/NimbleBluetooth.cpp b/src/nimble/NimbleBluetooth.cpp
@@ -112,6 +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
+    NimBLEDevice::deinit();
+#endif
 }
 
 bool NimbleBluetooth::isActive()

diff --git a/src/sleep.cpp b/src/sleep.cpp
@@ -277,6 +277,17 @@ void doDeepSleep(uint32_t msecToWake, bool skipPreflight = false)
     if (shouldLoraWake(msecToWake)) {
         enableLoraInterrupt();
     }
+
+#if defined(HELTEC_WIRELESS_PAPER) || defined(HELTEC_WIRELESS_PAPER_V1_0) // Applicable to most ESP32 boards?
+    // Avoid leakage through button pin
+    pinMode(BUTTON_PIN, INPUT);
+    rtc_gpio_hold_en((gpio_num_t)BUTTON_PIN);
+
+    // LoRa CS (RADIO_NSS) needs to stay HIGH, even during deep sleep
+    pinMode(LORA_CS, OUTPUT);
+    digitalWrite(LORA_CS, HIGH);
+    rtc_gpio_hold_en((gpio_num_t)LORA_CS);
+#endif
 #endif
     cpuDeepSleep(msecToWake);
 }