# HC-05 -\> Inquiring mode (INQ) **URL:** \ **Category:** General Guidance\ **Created:** [September 10, 2015, 9:57am UTC](https://forum.arduino.cc/t/hc-05-inquiring-mode-inq/334316 "2015-09-10T09:57:43Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Shihaoyap](https://avatars.discourse-cdn.com/v4/letter/s/b77776/32.png) [@Shihaoyap](https://forum.arduino.cc/u/Shihaoyap)\ **Post date:** [September 10, 2015, 9:57am UTC](https://forum.arduino.cc/t/hc-05-inquiring-mode-inq/334316/1 "2015-09-10T09:57:43Z")
Hello, I am currently doing a project which requires me to get the RSSI value of bluetooth devices. I am using an arduino Uno board and a HC-05 bluetooth module. Is it possible for the HC-05 to run in inquiring mode by itself? because right now i must always set it into inquiring mode by typing "AT+INQ" in the serial command. Is it possible to program the arduino so that the HC-05 is always in inquiring mode and will automatically take in the RSSI of bluetooth devices when i plug it into a power source. I have also set "AT+INQM = 1, 5000, 48". and the inquiring will always stop after some time. is it possible for it to run forever, until i switch it off? Thank you for your help. ---
**Author:** ![Riva](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/riva/32/1013044_2.png) [@Riva](https://forum.arduino.cc/u/Riva)\ **Post date:** [September 10, 2015, 10:28am UTC](https://forum.arduino.cc/t/hc-05-inquiring-mode-inq/334316/2 "2015-09-10T10:28:00Z")
> Shihaoyap: > I have also set "AT+INQM = 1, 5000, 48". and the inquiring will always stop after some time. is it possible for it to run forever, until i switch it off? Simple answer is no, you cannot make it run forever. The 48 in your command is the timeout value and can only be set between 1 and 48. 48 gives a timeout of about 61.44 seconds. What can't you get the arduino to look for the OK response when the command times out and send it again? DON'T CROSSPOST ---
**Author:** ![Shihaoyap](https://avatars.discourse-cdn.com/v4/letter/s/b77776/32.png) [@Shihaoyap](https://forum.arduino.cc/u/Shihaoyap)\ **Post date:** [September 11, 2015, 12:05pm UTC](https://forum.arduino.cc/t/hc-05-inquiring-mode-inq/334316/3 "2015-09-11T12:05:16Z")
@Riva -\>Thank you for your reply 🙂 How will i be able to make my program to read a "OK" from the serial monitor? ---
**Author:** ![Shihaoyap](https://avatars.discourse-cdn.com/v4/letter/s/b77776/32.png) [@Shihaoyap](https://forum.arduino.cc/u/Shihaoyap)\ **Post date:** [September 11, 2015, 12:15pm UTC](https://forum.arduino.cc/t/hc-05-inquiring-mode-inq/334316/4 "2015-09-11T12:15:56Z")
bump ---
**Author:** ![Riva](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/riva/32/1013044_2.png) [@Riva](https://forum.arduino.cc/u/Riva)\ **Post date:** [September 11, 2015, 12:31pm UTC](https://forum.arduino.cc/t/hc-05-inquiring-mode-inq/334316/5 "2015-09-11T12:31:51Z")
> Shihaoyap: > @Riva -\>Thank you for your reply 🙂 How will i be able to make my program to read a "OK" from the serial monitor? Similar to how your reading the data supplied by the AT+INQ you sent to the BT module. I assume your reading and acting on this data as your looking for the RSSI of nearby BT devices. ---
**Author:** ![Shihaoyap](https://avatars.discourse-cdn.com/v4/letter/s/b77776/32.png) [@Shihaoyap](https://forum.arduino.cc/u/Shihaoyap)\ **Post date:** [September 12, 2015, 4:33am UTC](https://forum.arduino.cc/t/hc-05-inquiring-mode-inq/334316/6 "2015-09-12T04:33:41Z")
@Riva This is the set of code i am using. It does seem to be able to repeat. Is it possible to help me have a look at it? #include \ SoftwareSerial BTSerial(10, 11); // RX | TX int count=0; char val; void setup() { pinMode(9, OUTPUT); // this pin will pull the HC-05 pin 34 (key pin) HIGH to switch module to AT mode digitalWrite(9, HIGH); Serial.begin(9600); Serial.println("Enter AT commands:"); BTSerial.begin(38400); // HC-05 default speed in AT command more Serial.println("AT"); BTSerial.println("AT"); delay(1000); Serial.println("AT+ORGL"); BTSerial.println("AT+ORGL"); delay(1000); Serial.println("AT+INIT"); BTSerial.println("AT+INIT"); delay(1000); Serial.println("AT+ROLE=1"); BTSerial.println("AT+ROLE=1"); delay(1000); Serial.println("AT+INQM=1,10000,48"); BTSerial.println("AT+INQM=1,10000,48"); delay(1000); BTSerial.println("AT+INQ"); delay(1000); } void loop() { // Keep reading from HC-05 and send to Arduino Serial Monitor if (BTSerial.available()) { Serial.write(BTSerial.read()); val = Serial.read(); } // Keep reading from Arduino Serial Monitor and send to HC-05 if (Serial.available()) { BTSerial.write(Serial.read()); val = Serial.read(); } if (val == 'OK') { BTSerial.println("AT+INQ"); } } ---
**Author:** ![Riva](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/riva/32/1013044_2.png) [@Riva](https://forum.arduino.cc/u/Riva)\ **Post date:** [September 12, 2015, 7:00am UTC](https://forum.arduino.cc/t/hc-05-inquiring-mode-inq/334316/7 "2015-09-12T07:00:00Z")
I see you have started a new thread on this [here](http://forum.arduino.cc/index.php?topic=347161.0) so I will stop replying here and comment in new thread. ---
**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\ **Post date:** [May 5, 2021, 5:36pm UTC](https://forum.arduino.cc/t/hc-05-inquiring-mode-inq/334316/8 "2021-05-05T17:36:22Z")
Closed on May 5, 2021, 5:36pm UTC