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    great utility¡

    2015-04-28 16:18:15

    this is a product very helpful, for the develop of basic control wireless.

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    Gerat product for Arduino projects

    2014-11-22 19:30:26

    First of all, although I ordered this item, I got another one slightly different to this which works at 3,3V (it hasn't got the safety diode in the input). Reference is CZ-HC-05 gomcu. Apart from that, it works well with Arduino boards, in my case Arduino 2560 Mega. This board has a pin for supplying 3,3V so it was eays to obtain the supply voltage. Anyway, to send data from the arduino to the bluetooth module I put a potentiometer to reduce from 5V to 3,3V. It is not the best option as there are

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    Product ok but information...

    2014-03-03 04:45:58

    This product is ok. In this version there is a diode in series on the TXD pin. So to communicate with Arduino Mega 2560 Serial1.read you have to put a resistor poolup. A 30K resistor between 5 V and TXD I had to put it out because not communicate.

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