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I don't have access to one until tomorrow .... you may want to try a different terminal program such as putty or terminal by br@y. Thanks Andrew. I am guessing that the problem with hyperterminal is that it doesn't have a line mode - each character is sent as soon as a key is pressed on the keyboar...

Seems I sorted it out but only partly and still cannot understand what's going on. Instead of using Hyperterminal I wrote a little program in VB6 that sends the AT commands and looks at the responses. Effectively it should be doing exactly what Hyperterminal does except that it does it automatically...

Hi, I have just purchased three of these modules and easily managed to get them to work in default transparent mode. I have connected one to a PC and one to a laptop, both using TTL-USB adapters. What I type on the PC appears on the laptop hyperterminal and vice versa. Even sending a long text file ...