To implement light sleep for ESP32 without changing setFlag

To put back missing code board->onAfterTransmit();

Author: IoTThinks

src/helpers/ESP32Board.h

@@ -65,16 +65,31 @@ class ESP32Board : public mesh::MainBoard {
     return; // Not supported
 #endif
 
-    gpio_intr_disable((gpio_num_t) wakeupPin); // To disable ISR for LoRa
+    // To configure GPIO wakeup
     esp_sleep_enable_gpio_wakeup();
     gpio_wakeup_enable((gpio_num_t) wakeupPin, GPIO_INTR_HIGH_LEVEL); // To wake up when receiving a LoRa packet
 
+    // To configure timer wakeup
     if (secs > 0) {
-      esp_sleep_enable_timer_wakeup(secs * 1000000); // To wake up periodically to do scheduled jobs
+      esp_sleep_enable_timer_wakeup(secs * 1000000ULL); // To wake up periodically to do scheduled jobs
     }
 
-    esp_light_sleep_start();                    // CPU enters light sleep
-    gpio_intr_enable((gpio_num_t) wakeupPin); // Wakeup. Let ISR to handle LoRa packet as normal
+    // To disable CPU interrupt servicing
+    noInterrupts();
+
+    // MCU to enter light sleep
+    esp_light_sleep_start();
+    Serial.println(esp_sleep_get_wakeup_cause());
+
+    // To avoid ISR flood during wakeup due to HIGH LEVEL interrupt
+#if defined(ESP32) && defined(RADIO_SX1276) && defined(P_LORA_DIO_0) // SX1276
+    gpio_set_intr_type((gpio_num_t)P_LORA_DIO_0, GPIO_INTR_POSEDGE);
+#elif defined(ESP32) && defined(P_LORA_DIO_1) // SX1262
+    gpio_set_intr_type((gpio_num_t)P_LORA_DIO_1, GPIO_INTR_POSEDGE);
+#endif
+
+     // To disable CPU interrupt servicing
+    interrupts();
   }
 
   void sleep(uint32_t secs) override {

src/helpers/radiolib/RadioLibWrappers.cpp

@@ -22,13 +22,6 @@ static
 void setFlag(void) {
   // we sent a packet, set the flag
   state |= STATE_INT_READY;
-
-  // To avoid ISR flood during wakeup due to HIGH LEVEL interrupt
-#if defined(ESP32) && defined(RADIO_SX1276) && defined(P_LORA_DIO_0) // SX1276
-  gpio_set_intr_type((gpio_num_t)P_LORA_DIO_0, GPIO_INTR_POSEDGE);
-#elif defined(ESP32) && defined(P_LORA_DIO_1) // SX1262
-  gpio_set_intr_type((gpio_num_t)P_LORA_DIO_1, GPIO_INTR_POSEDGE);
-#endif
 }
 
 void RadioLibWrapper::begin() {
@@ -144,6 +137,7 @@ bool RadioLibWrapper::startSendRaw(const uint8_t* bytes, int len) {
   }
   MESH_DEBUG_PRINTLN("RadioLibWrapper: error: startTransmit(%d)", err);
   idle();   // trigger another startRecv()
+  _board->onAfterTransmit();
   return false;
 }