We have two versions of custom shields that the sensors are connected to that electrically isolate the circuits. The first shield connects to the power, ground, and I2C SDA and SCL pins on the Mayfly. The second shield connects to the switched power, ground, and I2C SDA and SCL pins.
I found that on the board that uses our first version of the shield, which is what I have out in the field, the “Power” LED was staying on so I was able to switch that off with the LED Control. I’ll replace the battery and see how it does now.
The second version of our shield keeps the “Switched Power Out” LED on at all times.
Do you think these LEDs would cause that much of a power draw overnight, or could it be the shields? I don’t have documentation for the shields at the moment.