Samsung Smartwatch as Proximity Switch
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#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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