Urgent Help Needed for Bluetooth Controlled Robot

im having hc-05 without ttl base.
how its possible to solder those minute holes?

amruthkiran

These things help.
Very fine wire.
Very fine solder.
A fine tipped soldering iron.
A strong light and a magnifier.

Plan the order you solder the wires
so that already soldered wires don't get in the way.

put an insulation tape on the bottom side of board and then solder wires from side pads. you can also make use of burgstick connector so when you take wires out of pad they goes to connector. It will be a DIY kind of board.

i've soldered it somehow

now the problem is, i dont get a 3.3v supply. i only gets 1.74v from the regulator i bought(L7HL33).

1) Im planning to give a separate supply for HC-05 by using two AA Batteries. Is that Ok?

2) what is this AT commands? How to access it?

Please respond fastly as u can.

connected whole circuit.
hc-05 paired with phone.

motors not working.

how to know my uc is burned out or not?

give me anything like led blinking testing programs to check it

im using AT89S51. Does it make any diference?

2) what is this AT commands? How to access it?

You do not need any AT command for now. Just pair it with phone and see if you're getting right data.

connected whole circuit.
hc-05 paired with phone.

motors not working.

There is a small change in the source. comment or remove

MOV P3, #00 ; comment this line in source

instruction from the source code, flash and try again.

and LED blink program should be very simple... do you need source for that too?

improvement:::

connected, paired, when i press a button, the motors run but suddenly the of phone connection with hc-05 is lost. its happening everytime i pair.

im happy to see something is working at last but i need to fix this.

also i want the robot to stop when the bluetooth connection is lost. im some weak in programming, so is this part in the program now? or what should i do to add it?

it could be power issue. make sure motors and controller have enough power to run. if current is too less, everything will die.

ok. ill use separate batteries for hc-05

while soldering, the gold-coloured part from a pin fall off...
IS THIS A PROBLEM?

really?? can you post a picture. I am hoping you did not took the actual pad off the module. that gold part is usually what connects your track to pins.