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esp32blinky.ino
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esp32blinky.ino
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#include <BLEDevice.h>
#include <BLEServer.h>
#include <BLEUtils.h>
#include <BLE2902.h>
#include <TaskScheduler.h>
#define SERVICE_UUID "9a8ca9ef-e43f-4157-9fee-c37a3d7dc12d"
#define BLINK_UUID "e94f85c8-7f57-4dbd-b8d3-2b56e107ed60"
#define SPEED_UUID "a8985fda-51aa-4f19-a777-71cf52abba1e"
#define DEVINFO_UUID (uint16_t)0x180a
#define DEVINFO_MANUFACTURER_UUID (uint16_t)0x2a29
#define DEVINFO_NAME_UUID (uint16_t)0x2a24
#define DEVINFO_SERIAL_UUID (uint16_t)0x2a25
#define DEVICE_MANUFACTURER "The Cave"
#define DEVICE_NAME "ESP_Blinky"
#define PIN_BUTTON 0
#define PIN_LED LED_BUILTIN
Scheduler scheduler;
void buttonCb();
void blinkCb();
void blinkOffCb();
Task taskBlink(500, TASK_FOREVER, &blinkCb, &scheduler, false, NULL, &blinkOffCb);
Task taskButton(30, TASK_FOREVER, &buttonCb, &scheduler, true);
uint8_t blinkOn;
uint8_t blinkSpeed = 5;
BLECharacteristic *pCharBlink;
BLECharacteristic *pCharSpeed;
void setBlink(bool on, bool notify = false) {
if (blinkOn == on) return;
blinkOn = on;
if (blinkOn) {
Serial.println("Blink ON");
taskBlink.restartDelayed(0);
} else {
Serial.println("Blink OFF");
taskBlink.disable();
}
pCharBlink->setValue(&blinkOn, 1);
if (notify) {
pCharBlink->notify();
}
}
void setBlinkSpeed(uint8_t v) {
blinkSpeed = v;
taskBlink.setInterval(v * 100);
Serial.println("Blink speed updated");
}
void buttonCb() {
uint8_t btn = digitalRead(PIN_BUTTON) != HIGH;
if (btn) {
setBlink(!blinkOn, true);
taskButton.delay(1000);
}
}
void blinkCb() {
digitalWrite(PIN_LED, taskBlink.getRunCounter() & 1);
}
void blinkOffCb() {
digitalWrite(PIN_LED, 0);
}
class MyServerCallbacks: public BLEServerCallbacks {
void onConnect(BLEServer* pServer) {
Serial.println("Connected");
};
void onDisconnect(BLEServer* pServer) {
Serial.println("Disconnected");
}
};
class BlinkCallbacks: public BLECharacteristicCallbacks {
void onWrite(BLECharacteristic *pCharacteristic) {
std::string value = pCharacteristic->getValue();
if (value.length() == 1) {
uint8_t v = value[0];
Serial.print("Got blink value: ");
Serial.println(v);
setBlink(v ? true : false);
} else {
Serial.println("Invalid data received");
}
}
};
class SpeedCallbacks: public BLECharacteristicCallbacks {
void onWrite(BLECharacteristic *pCharacteristic) {
std::string value = pCharacteristic->getValue();
if (value.length() == 1) {
uint8_t v = value[0];
Serial.print("Got speed value: ");
Serial.println(v);
if (v >= 1 && v <= 10) {
setBlinkSpeed(v);
return;
}
}
pCharSpeed->setValue(&blinkSpeed, 1);
Serial.println("Invalid data received");
}
};
void setup() {
Serial.begin(115200);
Serial.println("Starting...");
pinMode(PIN_BUTTON, INPUT);
pinMode(PIN_LED, OUTPUT);
String devName = DEVICE_NAME;
String chipId = String((uint32_t)(ESP.getEfuseMac() >> 24), HEX);
devName += '_';
devName += chipId;
BLEDevice::init(devName.c_str());
BLEServer *pServer = BLEDevice::createServer();
pServer->setCallbacks(new MyServerCallbacks());
BLEService *pService = pServer->createService(SERVICE_UUID);
pCharBlink = pService->createCharacteristic(BLINK_UUID, BLECharacteristic::PROPERTY_READ | BLECharacteristic::PROPERTY_NOTIFY | BLECharacteristic::PROPERTY_WRITE);
pCharBlink->setCallbacks(new BlinkCallbacks());
pCharBlink->addDescriptor(new BLE2902());
pCharSpeed = pService->createCharacteristic(SPEED_UUID, BLECharacteristic::PROPERTY_READ | BLECharacteristic::PROPERTY_WRITE);
pCharSpeed->setCallbacks(new SpeedCallbacks());
pCharSpeed->setValue(&blinkSpeed, 1);
pService->start();
pService = pServer->createService(DEVINFO_UUID);
BLECharacteristic *pChar = pService->createCharacteristic(DEVINFO_MANUFACTURER_UUID, BLECharacteristic::PROPERTY_READ);
pChar->setValue(DEVICE_MANUFACTURER);
pChar = pService->createCharacteristic(DEVINFO_NAME_UUID, BLECharacteristic::PROPERTY_READ);
pChar->setValue(DEVICE_NAME);
pChar = pService->createCharacteristic(DEVINFO_SERIAL_UUID, BLECharacteristic::PROPERTY_READ);
pChar->setValue(chipId.c_str());
pService->start();
// ----- Advertising
BLEAdvertising *pAdvertising = pServer->getAdvertising();
BLEAdvertisementData adv;
adv.setName(devName.c_str());
//adv.setCompleteServices(BLEUUID(SERVICE_UUID));
pAdvertising->setAdvertisementData(adv);
BLEAdvertisementData adv2;
//adv2.setName(devName.c_str());
adv2.setCompleteServices(BLEUUID(SERVICE_UUID));
pAdvertising->setScanResponseData(adv2);
pAdvertising->start();
Serial.println("Ready");
Serial.print("Device name: ");
Serial.println(devName);
}
void loop() {
scheduler.execute();
}