 Switch triggerButton = Switch(triggerButtonPin);
 Switch resetButton = Switch(resetButtonPin);
 
-uint8_t heartbeatLEDPin = 13;
+uint8_t heartbeatLEDPin = 4;
 
 unsigned long lastHeartbeat = 0;
 bool isCommHealthy = false;

        }
        else {
            radio.read(&recvByte, 1);
            Serial.print("Received ack byte " + recvByte);
        }
    }
    else {

    }
    else if (millis() - lastHeartbeat >= HEARTBEAT_THRESH_MILLIS) {
        // Re-use ack byte for heartbeat
        validateAck(sendByte(ackVal));
    }

    digitalWrite(heartbeatLEDPin, isCommHealthy);
