Duet 2 Wifi - pin names on expansion header

ZipZap

Hey guys, quick question:

In RRF3, how do i declare at thermistor input on the expansion header?
The thermistor is on VSSA and the other end on the THERMISTOR7-pin and has a pullup of 4K7 to 3V3 as dc42 suggested (in older threads).

M308 S7 A"Chamber" P"e7temp" Y"thermistor" T100000 B3950	;set thermistor for heated chamber

Any helpt on how to declare would be appreciated.

/Julien

alankilian

@zipzap From THIS page I think one of these will be what you want

e6temp, duex.e6temp, exp.thermistor7, exp.39

ZipZap

Works, i should have scrolled to the bottom... i also added the R4700 value to the command.

The thermistor reads about 2000°C, fluctuating to 19xx and 45xx occasionally.
Is there a wiring issue?
The thermistor works fine, when connected to the e0 or e1 input on the board.

alankilian

@zipzap E0, E1and E2 have the pull-up installed on the board already.

4.7K pull to ADVREF.

ZipZap

This post is deleted!

ZipZap

@alankilian

Done.
Thermistor reads now -273,15° as if not connected, but the pin seems to work.
Does the other end go to VSSA, or GND?

alankilian

@zipzap Looks like VSSA to me.

ZipZap

@alankilian

~~According to the documentation the fuse should be intact, because all other temps are working properly.~~

~~Why could it read open circuit?~~

Stupid me has had a connection issue, where i had the sensor between, VSSA and VAREV and the pullup between VSSA and input7...

Everything is working fine now, thanks a bunch alan!

alankilian

@zipzap AWESOME!

I'm glad you got it working.