I have (3) PR55-48 devices all configured the same. I set the time delay on the devices to 14400 (4 hours) but all three are transmitting consistently every 5.5 hours. When I tested them, I had them set at 5 minutes, and they were very consistent. Any idea why they are off by 1.5 hr?
There is no RTC inside these devices. There is a software timer that counts the time; it drifts just like any other software timer. I will recommend setting the delay value to a lower value.
Our V3 devices have built-in RTC and can send data at dead on time; we are working on moving al devices to V3 hardware and firmware.