Weird temperatures displayed with Duet Maestro 1

Biggsis

Hello,

I want to upgrade a D-Bot with a Duet Maestro 1 I have here for a while.
Now the weird thing is, that both (Bed and E3D Hotend) Thermistor Temps are shown as around 9° degrees celsius, although the room temperature is around 22°C.
If I connect both Thermistors to a Duet Wifi, the readings are correct. Only the Maestro shows the 9°C

Firmware is 2.05 and the Thermistor Lines are the usual:

M305 P0 R4700 H0 L0
M305 P1 R4700 H0 L0

Anyone has an idea, what is wrong?

droftarts

@Biggsis Maestro doesn't have the same series resistors as Duet Wifi, so R4700 is wrong. Remove it, as the firmware knows the correct value to put in for the hardware, or change it to R2200.

I'm assuming you actually have more numbers in your M305 than that, eg something like
M305 P0 T100000 B4138 R2200

Otherwise, see https://duet3d.dozuki.com/Wiki/Gcode#Section_M305_Set_temperature_sensor_parameters

Ian

Biggsis

You are right, thank you very much. With the correct parameters the readings are now correct.