NASA Mars Exploration Rover Status Report, August 23, 2018: No signal from Opportunity has been heard. The dust storm on Mars continues to decay.
There has been no new storm activity within ~1,864 miles (3,000 kilometers) of the rover site. The atmospheric opacity (tau) over the rover is decreasing. As reported previously, it is expected that Opportunity has experienced a low-power fault, and then perhaps, a mission clock fault. (…)
The science team is also sending a command three times a week to elicit a beep if the rover happens to be awake… [More at link]