2-Pack HC-05 Board,Aideepen HC05 Pass-Through Module Slave and Master 6 Pin Serial Communication

It came with good packaging. Everything was intact and worked nicely.

It can be a crap shoot with electrical components when shopping online. These units gave me no problems in putting them in slave/master mode. My Hexapod robot, that these were used in, has had zero problems in Bluetooth control.

I use these HC-05 bridges to link Arduinos to controlling entities (typically Raspberry Pi's) to manage the cold side of my brewery. Three fermentation chambers and a reverse osmosis system all remotely controlled via Bluetooth so no wires to trip over.

Boards have shrink wrap around the board INCLUDING THE RESET BUTTON. See Photo. Broke reset button trying to remove shrink wrap so board wouldn't be in constant reset. Great Idea but bad application.

I ordered the 2 pack, and neither of them will connect to my android Bluetooth.I have another one on the octoped I'm building, and it works fine. I tried to swap both of the ones I bought here (not at the same time) in place of my original one, and neither connects. If someone knows how to get these to connect, please let me know.EDIT: After trying over and over, one started working, then later that night, the other was also working. Increasing the stars given.

Tired flashing these modules for my project, and unable to flash them successfully.