Merge branch 'master' of https://github.com/HelTecAutomation/Heltec_ESP32

Author: Heltec-Aaron-Lee

examples/LoRa/ReceiveCubeCellData/ReceiveCubeCellData.ino

@@ -0,0 +1,78 @@
+/*
+  This is a simple example show the Heltec.LoRa recived data in OLED.
+
+  The onboard OLED display is SSD1306 driver and I2C interface. In order to make the
+  OLED correctly operation, you should output a high-low-high(1-0-1) signal by soft-
+  ware to OLED's reset pin, the low-level signal at least 5ms.
+
+  OLED pins to ESP32 GPIOs via this connecthin:
+  OLED_SDA -- GPIO4
+  OLED_SCL -- GPIO15
+  OLED_RST -- GPIO16
+  
+  by Aaron.Lee from HelTec AutoMation, ChengDu, China
+  成都惠利特自动化科技有限公司
+  www.heltec.cn
+  
+  this project also realess in GitHub:
+  https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series
+*/
+#include "heltec.h" 
+
+
+#define BAND    868E6  //you can set band here directly,e.g. 868E6,915E6
+String rssi = "RSSI --";
+String packSize = "--";
+String packet ;
+
+
+
+void LoRaData(){
+  Heltec.display->clear();
+  Heltec.display->setTextAlignment(TEXT_ALIGN_LEFT);
+  Heltec.display->setFont(ArialMT_Plain_10);
+  Heltec.display->drawString(0 , 15 , "Received "+ packSize + " bytes");
+  Heltec.display->drawStringMaxWidth(0 , 26 , 128, packet);
+  Heltec.display->drawString(0, 0, rssi);  
+  Heltec.display->display();
+}
+
+void cbk(int packetSize) {
+  packet ="";
+  packSize = String(packetSize,DEC);
+  for (int i = 0; i < packetSize; i++) { packet += (char) LoRa.read(); }
+  rssi = "RSSI " + String(LoRa.packetRssi(), DEC) ;
+  LoRaData();
+}
+
+void setup() { 
+   //WIFI Kit series V1 not support Vext control
+  Heltec.begin(true /*DisplayEnable Enable*/, true /*Heltec.Heltec.Heltec.LoRa Disable*/, true /*Serial Enable*/, true /*PABOOST Enable*/, BAND /*long BAND*/);
+  //
+  LoRa.setSpreadingFactor(8);
+    // put in standby mode
+  LoRa.setSignalBandwidth(125E3);
+  LoRa.setCodingRate4(4);
+  LoRa.setSyncWord(0x12);   //0x34
+  LoRa.setPreambleLength(8);
+  
+  Heltec.display->init();
+  Heltec.display->flipScreenVertically();  
+  Heltec.display->setFont(ArialMT_Plain_10);
+
+  delay(1500);
+  Heltec.display->clear();
+  
+  Heltec.display->drawString(0, 0, "Heltec.LoRa Initial success!");
+  Heltec.display->drawString(0, 10, "Wait for incoming data...");
+  Heltec.display->display();
+  delay(1000);
+  //LoRa.onReceive(cbk);
+  LoRa.receive();
+}
+
+void loop() {
+  int packetSize = LoRa.parsePacket();
+  if (packetSize) { cbk(packetSize);  }
+  delay(10);
+}