I’ve been working on a project with PIC18F25K80 MCU for a while. My main purpose is to collect some sensor data based on user-defined intervals(like 1min) and since this is a battery-powered application I’m using sleep mode with WDT. The problem here is the accuracy of WDT is very low (+-15%) and I need to collect sensor measurements in a high-temp environment up to 125C. I’m using a 16MHz external XTAL for a primary system clock and wondering if there is a better/accurate way to use it for sleep mode instead WDT?