It is a 50Hz ~4.7V (depends on the current draw of the signal pin) square wave on v4.2 boards, 50Hz 3.3V square wave on v4.1. The frequency is hard coded in the firmware, and the voltage is in hardware.Does anyone know what the pulse output looks like from the heatermeter (I don't have an oscilloscope). I believe most are expecting a 3-5v peak to peak square wave with a 20ms cycle.
Anyone know if there is a config file somewhere where this could be edited?
For my HM 4.2.4, running software as current as when I built it last month. If there was a software update this month, I don't have it. When I was dialing in the servo, I would get a buzzing or chatter noise in the fully closed position but I think that was from the servo settings being too high. I had them set for 800 - 2400 but when I changed it to 800 - 2050, the servo still closed fully but no buzz/chatter. My servo is the Tower Pro MG90 with metal gear.
Dave
Just finished building my first HM 4.2.4 and also encounter the buzzing/ chatter of the servo. The frequency is about once per second. This happens, even if I set min and max to the neutral position (1500). I am using a DYMOND DS 5100 MG digital Servo (I intend to not use a blower, just the servo to open the vents on a Weber kettle).
Is there any news regarding the buzzing?
btw: Very cool project!