Freenove ESP32 User Manual

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125
Chapter 13 BLE
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BLE Bluetooth data transparent transmission routine:
The following is the code:
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#include "BluetoothService.h"
void setup() {
Serial.begin(115200);
Serial.println("\n\nProgram begin ... ");
bleSetup();
}
void loop() {
std::string buf = "I#8400#100\nI";
bleSend(buf);
delay(3000);
}
void onBleReceived(BLECharacteristic *pCharacteristic) {
std::string rxValue = pCharacteristic->getValue();
static String bleInputString = "";
Serial.print("onBleReceived: ");
if (rxValue.length() > 0) {
for (int i = 0; i < rxValue.length(); i++) {
bleInputString += rxValue[i];
if (rxValue[i] == '\n') {
Serial.println(bleInputString);
/*You can do something with the information you receive*/
bleInputString = ""; //Clear bleInputString.
}
}
}
}

Freenove ESP32 Specifications

General

Brand	Freenove
Model	ESP32
Category	Computer Hardware
Language	English