Dear Mike & bananasiong,
I have noticed a very weird thing on pin no. 2 [of USB module].
Using just the TX code:
The TX code works fine with the USB module and the voltage on pin 2 remains on (-) ive 0.02V
Using TX and RX code together:
The voltage on pin2 still remains on -.02V but as soon as I change the COM port in TERMINAL for the serial cable, the voltage gets to 5 V.
Thus serial cable works on COM1 [in TERMINAL] and the voltage gets 5V and when I use COM3 [for USB] the voltage drops to -.02V
Is this what causing the problem?
Many many thanks.
Vili
PS: COM2 & COM4 don't support the USB module!