I connected the URS232A with my computer as shown as image below.
5V supply connected to the converter +5V and GND pins and short circuit between TX and RX pins. After that , i use a software to test whether i can receive the data that i sent out. By right, i should received the data which i have sent out through the same port but however, it returned nothing. May i know that is there any wrong on this? I wish to know the answer because i tested the converter with my GSM modem. But , there is a failed connection. I not sure whether the converter is malfunction or not.