HC-05 pairing Atmega 2560

I wrote a program to control a robot remotely via HC-05 linked modules. The modules connect to an Esplora and an Atmega 2560. I haven't attached the program because upon testing, it's become apparent that the data isn't being received at all. Every once in a while, it will suddenly receive random characters (w, namely) that aren't being sent.

The weird thing is that it worked fine until yesterday. Has anyone experienced something like this? The Esplora and the Atmega both respond favorably to individual testing, and the HC-05s are blinking as if linked.