Files
btproximitylights/btcontrol.ino
dragonchaser b02614bd04 limit number of devices to monitor
Signed-off-by: dragonchaser <christian@boltares.de>
2025-07-08 17:53:01 +02:00

110 lines
3.0 KiB
C++

#include <Arduino.h>
#include <BLEDevice.h>
#include <BLEScan.h>
#include <FastLED.h>
#include <mutex>
#define BLE_ACTIVE_SCAN false
#define BLE_SCAN_INTERVAL 100
#define BLE_WINDOW 99 // less or equal setInterval value
#define NUM_LEDS 7
#define DATA_PIN 1
#define BRIGHTNESS 96
#define FRAMES_PER_SECOND 24
#define MAX_VANISH_COUNTER 50
#define MAX_MONITOR_DEVICES 10
CRGB leds[NUM_LEDS];
int scanTime = 1; //In seconds
BLEScan *pBLEScan;
std::map<String,uint8_t> deviceDatabase;
std::mutex callBackMutex;
CRGBPalette16 MyPalette;
class AdvertisedDeviceCallbacks : public BLEAdvertisedDeviceCallbacks {
void onResult(BLEAdvertisedDevice advertisedDevice) {
String addr = advertisedDevice.getAddress().toString();
String color = String("0x"+addr.substring(9,11)+addr.substring(12,14)+addr.substring(15,17));
color.toUpperCase();
color[1] = 'x';
if (deviceDatabase.contains(color) || deviceDatabase.size() + 1 < MAX_MONITOR_DEVICES) {
deviceDatabase[color] = MAX_VANISH_COUNTER;
}
Serial.printf("Address: %s RSSI: %d TX Power: %d Calculated color: %s \n", addr.c_str(), advertisedDevice.getRSSI(), advertisedDevice.getTXPower(), color.c_str());
for(int i=0; i<NUM_LEDS;i++) {
leds[i] = strtol(color.c_str(), NULL, 0);
}
std::vector<String> keys;
for (auto &itr : deviceDatabase) {
if (color != itr.first) {
itr.second--;
}
if(itr.second == 0) {
keys.push_back(itr.first);
}
}
for (const auto &itr : keys) {
deviceDatabase.erase(itr);
Serial.printf("Have not seen %s for %d ticks, removing!\n", itr, MAX_VANISH_COUNTER);
}
Serial.printf("Devicedatabase size: %d\n", deviceDatabase.size());
}
};
void setup() {
FastLED.delay(1000/FRAMES_PER_SECOND);
FastLED.addLeds<NEOPIXEL,DATA_PIN>(leds, NUM_LEDS);
for(int i=0; i<NUM_LEDS;i++) {
leds[i] = CRGB::Red;
}
FastLED.show();
FastLED.delay(1000/FRAMES_PER_SECOND);
for(int i=0; i<NUM_LEDS;i++) {
leds[i] = CRGB::Blue;
}
FastLED.show();
FastLED.delay(1000/FRAMES_PER_SECOND);
for(int i=0; i<NUM_LEDS;i++) {
leds[i] = CRGB::Green;
}
FastLED.show();
FastLED.delay(1000/FRAMES_PER_SECOND);
for(int i=0; i<NUM_LEDS;i++) {
leds[i] = CRGB::Black;
}
FastLED.setBrightness(BRIGHTNESS);
FastLED.show();
Serial.begin(115200);
Serial.println("Scanning...");
BLEDevice::init("");
pBLEScan = BLEDevice::getScan(); //create new scan
pBLEScan->setAdvertisedDeviceCallbacks(new AdvertisedDeviceCallbacks());
pBLEScan->setActiveScan(BLE_ACTIVE_SCAN); //active scan uses more power, but get results faster
pBLEScan->setInterval(BLE_SCAN_INTERVAL);
pBLEScan->setWindow(BLE_WINDOW); // less or equal setInterval value
}
void loop() {
{
std::lock_guard<std::mutex> lck(callBackMutex);
BLEScanResults *foundDevices = pBLEScan->start(scanTime, false);
pBLEScan->clearResults(); // delete results fromBLEScan buffer to release memory
}
FastLED.show();
FastLED.delay(1000/FRAMES_PER_SECOND);
}