My copters, running 3.2.1 FW on APM 2.8 HW will arm even though they should be in a low voltage “failsafe” mode. That is, I have the battery failsafe voltage set to 13V, but the craft will arm when the battery voltage is 12.4V.
I have my arming checks set to “1”.
Is this behavior normal? Is there any variable I can set that will prevent arming when the battery voltage is below the failsafe value?