Differences

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--- esp32:ble_serial_v1 [2019/09/29 19:40] – created aistis
+++ esp32:ble_serial_v1 [2019/10/01 21:55] (current) – aistis
@@ Line 1: / Line 1: @@
-<code c>
+ESP32 bluetooth BLE serial/UART example - forward: serial <=> BLE
+{{:esp32:pasted:20190930-090018.png}}
+<code cpp>
 #include <BLEDevice.h>
 #include <BLEServer.h>
 #include <BLEUtils.h>
 #include <BLE2902.h>
 BLECharacteristic *pCharacteristic;
 bool deviceConnected = false;
 #define SERVICE_UUID           "6E400001-B5A3-F393-E0A9-E50E24DCCA9E" // UART service UUID
 #define CHARACTERISTIC_UUID_RX "6E400002-B5A3-F393-E0A9-E50E24DCCA9E"
 #define CHARACTERISTIC_UUID_TX "6E400003-B5A3-F393-E0A9-E50E24DCCA9E"
 class MyServerCallbacks: public BLEServerCallbacks {
     void onConnect(BLEServer* pServer) { deviceConnected = true; Serial.println("connected"); };
     void onDisconnect(BLEServer* pServer) { deviceConnected = false; Serial.println("disconnected"); }
 };
 class MyCallbacks: public BLECharacteristicCallbacks {
     void onWrite(BLECharacteristic *pCharacteristic) {
       std::string rxValue = pCharacteristic->getValue();
-      if (rxValue.length() > 0)
+      for (int i = 0; i < rxValue.length(); i++) Serial.print(rxValue[i]);
-        for (int i = 0; i < rxValue.length(); i++) Serial.print(rxValue[i]);
     }
 };
 void setup() {
   Serial.begin(115200);
@@ Line 39: / Line 42: @@
   Serial.println("Waiting a client connection to notify...");
 }
 void loop() {
   if (deviceConnected) {
     if (Serial.available()) {
-      char txString[2];
+      std::string s = "";
-      txString[0] = Serial.read();
+      while (Serial.available()) s += Serial.read();
-      txString[1] = 0;
+      pCharacteristic->setValue(s.c_str());
-      pCharacteristic->setValue(txString);
+      pCharacteristic->notify();
-      pCharacteristic->notify(); // Send the value to the app!
     }
   }
-  delay(1);
 }
 </code>