According to the datasheet, you enter $$$ within 60 seconds of startup to enter command mode. No CR, just the three $$$ characters.After it responds, then you use commands with CR after them.Using the Roving Networks Wifly (Similar command mode entry) I use the Arduino IDE to use command mode. Select "no line ending" to send the $$$ then switch it to "Carriage return" to send commands.What you're probably doing now is sending $$$ CR which will not work. There must be a short period of no characters before and after the $$$.
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