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Hi, I bought an bluetooth module from dealextreme
I conected the voltage divisor to transform the 5V signal to 3.3 in the input of the bluetooth. It seems to work at the begining, when i wrote AT it responds OK, but 5 minutes later it stops. I try to reset de module but nothing happens, I tried to use another bluetooth but the problem is the same. How can I check if the arduino is sending a serial signal?
PD: There's no good english teachers in my country, I'm sorry

Thanks for reading

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It may be the case that the Bluetooth module goes to sleep as Bluetooth is discoverable for some seconds and then goes to sleep if there is no further communication/utilisation.
also in that case you need to check the instruction booklet.

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