Hello Arasu,
There are a few ways you can set up for cw operation on Hamsphere. The easiest way is to use a code oscillator to make the tones when you key. Set you transceiver mode to either LSB or USB depending on the band. Place a microphone next to the code oscillator and set your hamsphere transceiver's VOX control button to on and the VOX GAIN control to the second notch on the left (9 o'clock position as we say here in the states). when you press down on your key, the oscillator will provide the tone to the microphone and the VOX will activate the transceiver's PTT circuit and your cw will be transmitted (as well as any other noise in the room). The only problem with this method is that the oscillator tone noise may disturb the family.
The second way to get cw going is to purchase the cw keyer from the Hamsphere store (I would check the second hand shop in the store as someone may be selling their keyer for a cheaper price than the 30 Euros Hamsphere charges. Once you install the purchased keyer, set you transceiver's mode to cw. You can chose to use either the keyboard or a mouse to be the key. If you select the keyboard as the key, use the left or right arrow keys on you keyboard to key the transceiver. if you can chose the mouse setting, you must place your mouse cursor over the keyer while pressing the left mouse button which produces the keyer sidetone. I find this method to be difficult so I have opted for the third alternative, plug a straight key into the computer.
If you have a straight key or paddle, you will need to purchase a USB-to-serial Db9 converter cable (Amazon.com sells these). You will then need to fabricate a two wire connection to a female-to-female Db9 connector (using pins 4 and 6 for a manual key or pins 4, 6, and 8 for a paddle). The wires connect to either the straight key or paddle's terminal lugs from there you plug them into pins 4 and 6 for a manual straight key (and pin 8 for the paddle) of the Db9 female-to-female connector. The female-to-female Db9 connector then connects to the male serial connector side of the USB to serial converter cable. This is a lot of work to plug the straight key or paddle into the computer but it is the only way I know of (there may be other operators who know of better ways).
As I said above, If you can set a code oscillator next to your microphone, that would be the quickest way. You will need to adjust the MIC settings to keep the needle within the ALC green bar area on the signal meter. Try this out Arasu, and I will point my log periodic antenna towards you at the times I am sending cw. Hopefully the band conditions will make a cw qso possible. Let me know if what I wrote above was not clear or you have a question.
73,
CW Always!
Mike - W6KAY