Android Bluetooth .connect() exception Nexus 7 OBDII adapter -

i'm using standard api procedures connecting device. obdii bluetooth adapters.

i have 2 obdii bluetooth adapters, of different models. running exact same code, first pair , connect without issue every phone/tablet i've tested. second pair , connect fine except nexus 7 running android 4.2

it throws ioexception: read failed, socket might closed or timeout, read ret: -1

thought wrong device or newer release... piece of software "torque" able connect either adapter nexus 7.

so i'm doing wrong/different issue in later os???

any figuring out appreciated.

    public void run() {         log.i(tag, "begin mconnectthread");         setname("connectthread");          // cancel discovery because slow down connection         madapter.canceldiscovery();          // make connection bluetoothsocket         try {             // blocking call , return on             // successful connection or exception              mmsocket.connect(); <=**this exception thrown          } catch (ioexception e) {             etype =  "connection to: " + mmdevice.getname() + " at: "                     + mmdevice.getaddress() + " failed: " + e.getmessage();             connectionfailed();             // close socket             try {                 mmsocket.close();             } catch (ioexception e2) {                 log.e(tag, "unable close() socket during connection failure", e2);             }             // start service on restart listening mode             bluetoothchatservice.this.start();             return;         } 

i know kind of old question. not able find solution on web. people searching might interested in workaround have found: ioexception: read failed, socket might closed - bluetooth on android 4.3