Method and system of granting control access via QR code

1. A method of granting control access, comprising the steps of:

a building system information unit (BSIU) sending an access request to a fire alarm control unit (FACU);

the FACU, upon receiving the access request, displaying a displayed quick response (QR) code;

the BSIU:

capturing an image of the displayed QR code,

decoding the displayed QR code to generate a decoded QR code, and

forwarding a portion of the decoded QR code to the FACU; and

the FACU:

receiving the portion of the decoded QR code,

validating that the portion of the decoded QR code corresponds with the displayed QR code, and

if the portion of the decoded QR code is valid, granting control access to the BSIU for a predetermined period of time defined by a control access window.

2. The method of claim 1 , wherein the control access window is configurable.

3. The method of claim 1 , wherein when the control access window expires, the control access is withdrawn.

4. The method of claim 1 , wherein the BSIU is configured to capture the displayed QR code with a built-in camera.

5. The method of claim 1 , wherein the BSIU is a smartphone or a tablet.

6. The method of claim 1 wherein the displayed QR code comprises date and time information.

7. The method of claim 1 , wherein the displayed QR code comprises a GUID.

8. The method of claim 1 , wherein the portion of the decoded QR code comprises all of the decoded QR code.

9. The method of claim 1 , wherein the BSIU displays a first indication indicating that it is actively scanning to capture the image.

10. The method of claim 9 , wherein when control access is granted, the first indication is replaced with a second indication indicating that control access has been granted.

11. The method of claim 9 , wherein when control access is granted, the BSIU displays an indication of time remaining until control access is withdrawn.

12. The method of claim 11 , wherein the indication of time remaining is updated at regular intervals.

13. A system, comprising:

a building system information unit (BSIU) configured to send an access request to a fire alarm control unit (FACU);

the FACU configured to display a displayed quick response (QR) code, upon receiving the access request;

the BSIU configured to:

capture an image of the displayed QR code,

decode the displayed QR code to generate a decoded QR code, and

forward a portion of the decoded QR code to the FACU; and

the FACU configured to:

receive the portion of the decoded QR code,

validate that the portion of the decoded QR code corresponds with the displayed QR code, and

if the portion of the decoded QR code is valid, the FACU may be configured to grant control access to the BSIU for a predetermined period of time defined by a control access window.

14. The system of claim 13 , wherein the control access window is configurable.

15. The system of claim 13 , wherein when the control access window expires, the control access is withdrawn.

16. The system of claim 13 , wherein the BSIU is configured to capture the displayed QR code with a built-in camera.

17. The system of claim 13 , wherein the BSIU is a smartphone or a tablet.

18. The system of claim 13 , wherein the displayed QR code comprises date and time information.

19. The system of claim 13 , wherein the displayed QR code comprises a GUID.

20. The system of claim 13 , wherein the portion of the decoded QR code comprises all of the decoded QR code.

21. The system of claim 13 , wherein the BSIU displays a first indication indicating that it is actively scanning to capture the image.

22. The system of claim 21 , wherein when control access is granted, the first indication is replaced with a second indication indicating that control access has been granted.

23. The system of claim 13 , wherein when control access is granted, the BSIU displays an indication of time remaining until control access is withdrawn.

24. The system of claim 23 , wherein the indication of time remaining is updated at regular intervals.