Showing posts with label mode. Show all posts
Showing posts with label mode. Show all posts
Saturday, August 27, 2016
AT Command mode of HC 05
AT Command mode of HC 05
HC-05 Bluetooth Module support both Master and Slave roles. We can set it in AT Command mode. There are a number of variant of HC-05, and different ways to enter AT Command mode. For my samples, there is a button on the lower-right, above EN pin. Its used to enter AT Command mode when power-on.
This video show how to connect PC to HC-05, via FTDI USB-to-Serial adapter, power-on HC-05 in AT Command mode, and enter AT Command using Arduino Serial Monitor to check setting of HC-05.
Please notice both FTDI USB-to-Serial adapter and HC-05 have to work on the same voltage, both 3.3V or both 5V.
- Connect FTDI and HC-05
FTDI Tx - HC-05 Rx
FTDI Rx - HC-05 Tx
FTDI GND - HC-05 GND
(no power apply to HC-05 now)
- Connect FTDI to PC using USB cable.
- You can check the COM port connect to FTDI in Deviec Manager.
- Start Arduino IDE, and run Tools > Serial Monitor.
- Set baud rate 38400 and select "both NL & CR".
- Press the on-board button of HC-05.
- Apply power to HC-05.
- The on-board LED of HC-05 will blink slowly.
- Now its in AT Command mode.
- You can type AT command in Arduino Serial Monitor to check or set the setting of HC-05.
Some useful command:
AT : return OK if connect correctly.
AT+NAME : get/set name of the device. Nothing return in my sample.
AT+ADDR : display default address
AT+VERSION : display firmware version
AT+UART : get/set serial communication setting; such as baud, number of stop bit, and parity.
AT+ROLE: get/see role of bt module(1=master/0=slave)
AT+RESET : Reset and exit AT mode
AT+ORGL : Restore factory settings
AT+PSWD: get/set default PIN
reference:
- iteadstudio: Serial Port Bluetooth Module (Master/Slave) : HC-05
- HC-03/05 Embedded Bluetooth Serial Communication Module
AT command set
Wednesday, August 17, 2016
Change Radio Mode for AP48
Change Radio Mode for AP48
How to change the Radio mode ( a or b or g or b/g ) on
“Ethernet adapter mode” and “WISP mode”
The 48 default is on 11a mode, when you want to change to another mode (11b or 11g or 11b/g ). Please go to advanced page to change the radio mode. Below is the setup procedure
Tuesday, August 16, 2016
Change from IDE to AHCI mode in Windows 7
Change from IDE to AHCI mode in Windows 7
If you already have Windows 7 installed and choose to upgrade to a new SSD then you will definetly want to take advantage of the benefits that AHCI has to offer.
Once you change it in your BIOS from IDE to AHCI on the drive controller you have probably found that Windows 7 will blue screen and will not load. This is because any drivers that are not needed are not activated in Windows 7.
To give an example of the performance difference take a look at this photo. This was taken when my drive was set to IDE.
Now take a look once it was changed over to AHCI. MASSIVE performance difference.
To make this change yourself, enable the AHCI driver in the registry before you change the SATA mode of the boot drive. To do this, follow these steps:
- Exit all Windows-based programs.
- Click Start, type regedit in the Start Search box, and then press ENTER.
- If you receive the User Account Control dialog box, click Continue.
- Locate and then click one of the following registry subkeys:
HKEY_LOCAL_MACHINESystemCurrentControlSetServicesIastorV
- In the pane on the right side, right-click Start in the Name column, and then click Modify.
- In the Value data box, type 0, and then click OK.
- On the File menu, click Exit to close Registry Editor.
Microsoft also has a FIX-IT you can run to do the same thing if youre uneasy with making changes to the registry.
As always make sure you have good backups before you begin.
Good luck.
Wednesday, August 3, 2016
Convert Cisco 1700 2700 Series APs to Autonomous Mode
Convert Cisco 1700 2700 Series APs to Autonomous Mode
For smaller environments its not always cost effective to buy a WLC so the need arises to put the APs into autonomous mode.
Since the 1700/2700 series APs ship in lightweight mode, heres how to change them over to autonomous mode:
1. Log in to www.cisco.com
2. Click on "Support" at the top of the page.
3. Click the "Downloads" button.
4. Select "Wireless" from the left side.
5. Select "Access Points".
6. Select "Cisco 1700 Series Access Points".
7. Select Cisco Aironet 1702i Access Points".
8. Click "Autonomous AP IOS Software". As of this writing the latest version is 15.3.3-JBB1(ED)
9. Connect to the AP using a console cable.
10. Power on the AP. If you have a POE switch then that way is best. If not use a power injector or power cord for the AP.
11. Start a TFTP server on your laptop or PC and set the LAN interface to 10.0.0.1 255.25.255.0
12. Open a serial connection to the AP. Once the boot up finishes log in. Remember the default password is Cisco.
13. Enter the following commands in this order:
- enable
- debug capwap console cli
- debug capwap client no-reload
- capwap ap ip address 10.0.0.2 255.255.255.0
- capwap ap ip default-gateway 10.0.0.1
- archive download-sw /force /overwrite tftp://10.0.0.1/filename.tar
14. Once the upload, extraction, and installation is complete (3 to 5 minutes) the AP will restart.
15. Once the restart is completed log in and do a show version command.
16. Verify the AP now provides access to the full suite of IOS commands.
17. Configure as needed.
If you get any errors from the AP while it is still in lightweight mode during this process I find it easiest to just put these commands into a text file and then paste them into Putty vs trying to type them in with the lines scrolling.
I hope this helps you get your APs setup faster and dont have to deal with a complicated process.
Good luck.
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