Merge pull request #1570 from Quency-D/fix-heltec-power-consumption

Fix heltec-v4 power consumption

src/helpers/ui/SSD1306Display.cpp

@@ -18,17 +18,23 @@ bool SSD1306Display::begin() {
 }
 
 void SSD1306Display::turnOn() {
-  display.ssd1306_command(SSD1306_DISPLAYON);
   if (!_isOn) {
     if (_peripher_power) _peripher_power->claim();
-    _isOn = true;
+    _isOn = true;  // set before begin() to prevent double claim
+    if (_peripher_power) begin();  // re-init display after power was cut
   }
+  display.ssd1306_command(SSD1306_DISPLAYON);
 }
 
 void SSD1306Display::turnOff() {
   display.ssd1306_command(SSD1306_DISPLAYOFF);
   if (_isOn) {
-    if (_peripher_power) _peripher_power->release();
+    if (_peripher_power) {
+#if PIN_OLED_RESET >= 0
+      digitalWrite(PIN_OLED_RESET, LOW);
+#endif
+      _peripher_power->release();
+    }
     _isOn = false;
   }
 }

variants/heltec_v4/platformio.ini

@@ -53,6 +53,7 @@ build_flags =
   -D HELTEC_LORA_V4_OLED
   -D PIN_BOARD_SDA=17
   -D PIN_BOARD_SCL=18
+  -D PIN_OLED_RESET=21
   -D ENV_PIN_SDA=4
   -D ENV_PIN_SCL=3
 build_src_filter= ${Heltec_lora32_v4.build_src_filter}