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Samsung Smartwatch as Proximity Switch
#include <BLEAdvertisedDevice.h>
#include <BLEDevice.h>
#include <BLEScan.h>
const int PIN = 2;
const int CUTOFF = -60;
void setup() {
pinMode(PIN, OUTPUT);
BLEDevice::init("");
}
void loop() {
BLEScan *scan = BLEDevice::getScan();
scan->setActiveScan(true);
BLEScanResults results = scan->start(1);
int best = CUTOFF;
for (int i = 0; i < results.getCount(); i++) {
BLEAdvertisedDevice device = results.getDevice(i);
int rssi = device.getRSSI();
if (rssi > best) {
best = rssi;
}
}
digitalWrite(PIN, best > CUTOFF ? HIGH : LOW);
}
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