Anet A8 thermistor readings

HowardTheDuck

I've just wired up a Duet 2 Wifi to an Anet A8 with an E3D Volcano hotend and BLTouch Z probe. Upon initial boot, it appeared to display correct temperatures for both the bed and extruder sensors. I then followed the recommended firmware upgrade procedure, and now the temperature displays as -273C on my paneldue, and reads as follows on the web interface:
Tool 0 | undefined n/a | n/a
Bed | Heater 0 off | error

I then used https://configtool.reprapfirmware.org to generate the config files, updated them, but it is still generating the same readings.

How do I fix this?

droftarts

@HowardTheDuck Please send M115 to the Duet and post the response. Please also post your config.g file. When you updated the firmware, did you go from v2.x to v3? If so, there are some changes you'll need to make to the config.g file.

Ian

HowardTheDuck

config.g

M115
FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 3.0 ELECTRONICS: Duet WiFi 1.02 or later FIRMWARE_DATE: 2020-01-03b3

I'm not sure what firmware was installed prior to the update; it was the same firmware that it shipped with. The board was purchased approximately 6 weeks ago if that might be of any help, and there is a sticker on the box with the text "Duet 2 Wifi v1.04c

jrwaters2

@HowardTheDuck FWIW, I started with an Anet A8 as well using E3D v6 style hotend and thermisters.

My config file has:
M305 P0 T100000 B4725 C7.060000e-8 R4700 ; set thermistor + ADC parameters for heater 0

However, one thing I would check is your connectors. These thermisters have the thinnest wire of anything in the system so maybe you just have a loose connector. To be safe, I'd do a continuity check with a multi-meter or just re-crimp the wires.

Jack

aidar

Please read this as you upgraded to firmware 3. https://duet3d.dozuki.com/Wiki/RepRapFirmware_3_overview#Section_Summary_of_what_you_need_to_do_to_convert_your_configuration_and_other_files

Veti

@HowardTheDuck said in Anet A8 thermistor readings:

I then used https://configtool.reprapfirmware.org to generate the config files, updated them, but it is still generating the same readings.

upload the json file again, and select duet firmware 3.0.

HowardTheDuck

@Veti Thank you, this fixed the thermistor problem.