BLE GATT: Read/Write a Characteristic

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17

#include <BLEDevice.h>

#include <BLEUtils.h>

#include <BLEServer.h>

BLECharacteristic * ch;
void setup() {
  BLEDevice::init("ESP32 BLE");
  auto s = BLEDevice::createServer();
  auto svc = s -> createService(BLEUUID((uint16_t) 0x180A));
  ch = svc -> createCharacteristic(BLEUUID((uint16_t) 0x2A57), BLECharacteristic::PROPERTY_READ | BLECharacteristic::PROPERTY_WRITE);
  ch -> setValue("hi");
  svc -> start();
  BLEDevice::startAdvertising();
}
void loop() {}