Is there a procedure for programming version DBNOx boards with GPS?

Technical Note No. 025 

Procedure for Programming Version DBNOx Circuit Boards with GPS 

Date:  5 August 2010 

Author:  Craig Williford 

Requirements
Programming the ozone monitor requires a computer running the "Analog Devices Serial 
Downloader" program to download the firmware from the computer to the ozone monitor, 
and the rs232 serial cable provided by 2B Technologies.  The computer must have a 
serial port or a USB port with a USB to Serial converter cable to connect to the rs232 
serial cable provided by 2B Technologies.   

Procedure
1. Disconnect external GPS from instrument. 

2. Remove tape from loose brown wire connected to D9 serial connector on back of 
instrument and insert loose brown wire into J26 between yellow and black wire. 

3. Install the Windows Serial Downloader (WSD) by starting the executible file you 
have just unzipped. 

4. Start the Windows Serial Downloader program that you just installed. 

5. Connect one end of the serial cable provided by 2B Technologies to serial 
connection on rear side of ozone monitor and the other end to the computer.  Or if 
the computer does not have a serial port, connect the other end to the USB to 
Serial converter cable.   

6. Remove the top cover of the ozone monitor.  Instructions for removal are located in 
the ozone monitor manual. 

7. Locate the small buttons labeled “sw1” and “sw2” on the circuit board inside the 
ozone monitor.   

8. Turn on the ozone monitor. 

9. Press and hold the switch labeled “sw2”.  While holding “sw2” down, press and 
depress the switch labeled “sw1”.  Now release “sw2”.  This will enter the board 
into “Serial Download Mode”.

10. On the computer running the Windows Serial Downloader, locate the “Reset” 
button on the program’s window.  Press the “Reset” button.  If the board is 
connected correctly and in “Serial Download Mode”, you will see this message: 
“Configuration: COM1, 9600 baud 

RESETTING PART: OK” 

*If you do not see this message, repeat steps 8 through 10 until you see the correct 
message 

11. Press the “Download” button located on the Windows Serial Downloader.  This 
will bring up a window prompting you to choose the file with a .hex extension to be 
downloaded.  Find the .hex file that was provided by 2B Technologies and select it.  
A bar will appear showing the status of the download and the download should 
only take a few seconds.   

12. The Board is programmed!  Turn the ozone monitor off and on again to start the 
new program.   

13. Enter the menu of the ozone monitor and re-enter all of the parameters (Averaging 
time, Calibration parameters, External, Baud Rate, Units).  You must do this 
because the internal eeprom memory is cleared when the microcontroller is 
reprogrammed.    

14. Remove the brown wire from J26 located on the circuit board and place electrical 
tape around it to protect it from touching the chassis ground. 

Note:  If step 10 is unsuccessful, please click this link to our support page to submit a ticket or you can email techsupport@2btech.io for further assistance.