Let's Make Robots!


Help: Weird HC-05 behavior

Hi. I'm having problems with the HC-05 and I hope someone can help. I've wired it up to an FTDI USB<->Serial connected to my PC just to test it out.

1. If I send it an AT command, it seems to enter an infinite loop where it sends OK back. If I power off & on, send it AT+VERSION, it enters an infinite loop sending the version info and OK. Basically, any AT command gets infinite responses.

Bluetooth HC-05 not working


I just got my bluetooth HC-05 module from ebay today. I soldered all the essential wires (Vcc,Gnd,LEDs,RX/TX) properly and connected it to a 3.3 volt supply. but when I switched on the power, nohing happened.