I recently got the smart filament sensor from Bigtreetech and have some trouble getting it to work with my Duet 2 maestro.
Since the 2 previous posts I found did not get it to work either and left me confused about the sensor type and pinout I decided to take mine apart to have a look inside.

After poking around with a multimeter I came to the following pinout:

| Out
-- GND
• Vin

I calculated the distance between the holes to figure out the pulse/mm and (if I did my math correctly) got 7.26mm which is close enough to the advertised 7mm detection length.

I added the sensor to the config.g using the following line and left R & E a bit high hoping to calibrate it later:

M591 D0 P7 C3 R0:200 L7.26 E25.0 S1;

Using the camera on my phone I could see the IR led so I assumed everything was wired correctly and started a print to have it collect data and calibrate but I got the following result during the print.

M591 D0
Pulse-type filament monitor on endstop input 3, enabled, sensitivity 7.26mm/pulse, allowed movement 0% to 200%, check every 25.0mm, no calibration data

At this point im stuck trying to figure out why this is happening.

I measured the voltage coming out of the sensor and it seems to be fluctuating between 2.44V & 2.58V. So it's not producing a pulse as I (and maybe the Duet) was expecting to see.

What would be the correct sensor type for this to work? I tried the Duet3D rotating magnet sensor with no success.
Alternatively would converting this sine wave to a square wave give the Duet the input it's expecting?

@dc42 All from the internal SD card. I upload everything via the web interface. I don't have an external SD card socket.

@dc42 Thank you for looking in to this.
I made the daemon.g file, does that run automatically on startup or do I need to do something once a month?
I'll wait for a new SD card to arrive tomorrow.

@Phaedrux

Would the gcode be helpful? It doesn't consistently happen even with running the same file again. The last one happend during a mesh level command

M98 P"config.g"
HTTP is enabled on port 80
FTP is disabled
TELNET is disabled
Warning: Heater 1 appears to be over-powered. If left on at full power, its temperature is predicted to reach 463C

Im on 3.2.2 now and it suddenly stopped again. This time not during a print but during the auto bed leveling. Does that rule out the sd card causing issues?

M122
=== Diagnostics ===
RepRapFirmware for Duet 2 Maestro version 3.2.2 running on Duet Maestro 1.0
Board ID: 08DJM-956DU-LLMS4-7JTD6-3SS6L-KVLUR
Used output buffers: 1 of 24 (10 max)
=== RTOS ===
Static ram: 22284
Dynamic ram: 73128 of which 24 recycled
Never used RAM 19396, free system stack 206 words
Tasks: NETWORK(ready,206) HEAT(blocked,341) TMC(blocked,117) MAIN(running,478) IDLE(ready,21)
Owned mutexes:
=== Platform ===
Last reset 00:15:27 ago, cause: software
Last software reset at 2021-02-15 17:22, reason: StuckInSpinLoop, GCodes spinning, available RAM 18992, slot 0
Software reset code 0x4083 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0000080f BFAR 0xe000ed38 SP 0x200042cc Task MAIN Freestk 754 ok
Stack: 0041e60b 00455812 610b0000 00000000 00000000 20002858 00000001 00000001 00000014 7f61294e 20000c68 00000001 00000000 00000001 20000c68 00000028 7f62712c 200028cc 0041e9f1 00000001 00000000 00004184 0041f171 20000c68 00000001 7f5e9f7b 00f07fff
Error status: 0x00
Aux0 errors 0,0,0
MCU temperature: min 19.4, current 20.0, max 21.0
Supply voltage: min 0.0, current 24.4, max 24.4, under voltage events: 0, over voltage events: 0, power good: yes
Driver 0: position 0, standstill, read errors 0, write errors 1, ifcnt 23, reads 23427, writes 8, timeouts 0, DMA errors 0
Driver 1: position 0, standstill, read errors 0, write errors 1, ifcnt 23, reads 23427, writes 8, timeouts 0, DMA errors 0
Driver 2: position 0, standstill, read errors 0, write errors 1, ifcnt 25, reads 23427, writes 8, timeouts 0, DMA errors 0
Driver 3: position 0, standstill, read errors 0, write errors 1, ifcnt 22, reads 23427, writes 8, timeouts 0, DMA errors 0
Driver 4: position 0, standstill, read errors 0, write errors 1, ifcnt 13, reads 23429, writes 6, timeouts 0, DMA errors 0
Driver 5: position 0, assumed not present
Driver 6: position 0, assumed not present
Date/time: 2021-02-15 17:38:44
Slowest loop: 72.61ms; fastest: 0.17ms
I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0
=== Storage ===
Free file entries: 10
SD card 0 detected, interface speed: 15.0MBytes/sec
SD card longest read time 1.4ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 83, maxWait 0ms, bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters = 0 -1, chamberHeaters = -1 -1
=== GCodes ===
Segments left: 0
Movement lock held by null
HTTP is idle in state(s) 0
Telnet is idle in state(s) 0
File is idle in state(s) 0
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
Daemon is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty.
=== Network ===
Slowest loop: 6.40ms; fastest: 0.02ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions
HTTP sessions: 1 of 8
Interface state active, link 100Mbps full duplex

Just updated to 3.2.2. I'll probably find out tomorrow if it fixed the issue

I think I forgot to remove that after I copied the first thermistor.
If the config is fine do you know what steps I could take to figure out why it randomly stops?

I tried to include it but it aperantly didn't show up.
Does it work now?
config.g

Hello,

I recently updated to RRF3 and occasionally it stops mid print and ends the job. When I run the same gcode again it just prints fine.
Today it happend twice on different gcode and with successful prints in between. The M122 shows nearly identical results (included below).
Since it happend after updating I suspect I maybe made an error in the config.g. What would be the best way to find these?

M122
=== Diagnostics ===
RepRapFirmware for Duet 2 Maestro version 3.2 running on Duet Maestro 1.0
Board ID: 08DJM-956DU-LLMS4-7JTD6-3SS6L-KVLUR
Used output buffers: 3 of 24 (10 max)
=== RTOS ===
Static ram: 22292
Dynamic ram: 73128 of which 24 recycled
Never used RAM 19388, free system stack 214 words
Tasks: NETWORK(ready,204) HEAT(blocked,340) TMC(blocked,117) MAIN(running,477) IDLE(ready,20)
Owned mutexes:
=== Platform ===
Last reset 00:05:38 ago, cause: software
Last software reset at 2021-02-13 11:38, reason: StuckInSpinLoop, GCodes spinning, available RAM 19352, slot 2
Software reset code 0x4083 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0000080f BFAR 0xe000ed38 SP 0x2000437c Task MAIN Freestk 797 ok
Stack: 0041e471 004555e2 610f0000 00000000 00000001 0041da55 00004009 00000001 e000ed04 20000c68 00000001 00004009 00000001 20000c68 0041e763 00000001 00000001 00000000 0041eedd 00000000 00000001 200045dc 00f07fff 00000000 20000c30 00004009 20000e48
Error status: 0x00
Aux0 errors 0,0,0
MCU temperature: min 19.7, current 20.1, max 21.2
Supply voltage: min 0.0, current 24.4, max 24.4, under voltage events: 0, over voltage events: 0, power good: yes
Driver 0: position 0, standstill, read errors 0, write errors 1, ifcnt 21, reads 56346, writes 8, timeouts 0, DMA errors 0
Driver 1: position 0, standstill, read errors 0, write errors 1, ifcnt 21, reads 56346, writes 8, timeouts 0, DMA errors 0
Driver 2: position 0, standstill, read errors 0, write errors 1, ifcnt 21, reads 56346, writes 8, timeouts 0, DMA errors 0
Driver 3: position 0, standstill, read errors 0, write errors 1, ifcnt 21, reads 56346, writes 8, timeouts 0, DMA errors 0
Driver 4: position 0, standstill, read errors 0, write errors 1, ifcnt 13, reads 56348, writes 6, timeouts 0, DMA errors 0
Driver 5: position 0, assumed not present
Driver 6: position 0, assumed not present
Date/time: 2021-02-13 11:44:13
Slowest loop: 74.25ms; fastest: 0.17ms
I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0
=== Storage ===
Free file entries: 10
SD card 0 detected, interface speed: 15.0MBytes/sec
SD card longest read time 1.4ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 83, maxWait 0ms, bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters = 0 -1, chamberHeaters = -1 -1
=== GCodes ===
Segments left: 0
Movement lock held by null
HTTP is idle in state(s) 0
Telnet is idle in state(s) 0
File is idle in state(s) 0
USB is idle in state(s) 0
Aux is idle in
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
Daemon is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty.
=== Network ===
Slowest loop: 5.57ms; fastest: 0.02ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions
HTTP sessions: 1 of 8
Interface state active, link 100Mbps full duplex

M122
=== Diagnostics ===
RepRapFirmware for Duet 2 Maestro version 3.2 running on Duet Maestro 1.0
Board ID: 08DJM-956DU-LLMS4-7JTD6-3SS6L-KVLUR
Used output buffers: 3 of 24 (10 max)
=== RTOS ===
Static ram: 22292
Dynamic ram: 73128 of which 24 recycled
Never used RAM 19388, free system stack 214 words
Tasks: NETWORK(ready,206) HEAT(blocked,334) TMC(blocked,117) MAIN(running,468) IDLE(ready,20)
Owned mutexes:
=== Platform ===
Last reset 00:02:09 ago, cause: software
Last software reset at 2021-02-13 15:10, reason: StuckInSpinLoop, GCodes spinning, available RAM 19352, slot 0
Software reset code 0x4083 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0000080f BFAR 0xe000ed38 SP 0x2000437c Task MAIN Freestk 797 ok
Stack: 0041e471 004555e0 610f0000 00000000 00000001 0041da55 00004181 00000001 e000ed04 20000c68 00000001 00004181 00000001 20000c68 0041e763 00000001 00000001 00000000 0041eedd 00000000 00000001 2000448c 00f07fff 0000000f 20000c30 00004181 20000e48
Error status: 0x00
Aux0 errors 0,0,0
MCU temperature: min 21.2, current 21.7, max 22.4
Supply voltage: min 0.0, current 24.4, max 24.4, under voltage events: 0, over voltage events: 0, power good: yes
Driver 0: position 0, standstill, read errors 0, write errors 1, ifcnt 26, reads 21594, writes 8, timeouts 0, DMA errors 0
Driver 1: position 0, standstill, read errors 0, write errors 1, ifcnt 26, reads 21594, writes 8, timeouts 0, DMA errors 0
Driver 2: position 0, standstill, read errors 0, write errors 1, ifcnt 28, reads 21594, writes 8, timeouts 0, DMA errors 0
Driver 3: position 0, standstill, read errors 0, write errors 1, ifcnt 26, reads 21594, writes 8, timeouts 0, DMA errors 0
Driver 4: position 0, standstill, read errors 0, write errors 1, ifcnt 13, reads 21596, writes 6, timeouts 0, DMA errors 0
Driver 5: position 0, assumed not present
Driver 6: position 0, assumed not present
Date/time: 2021-02-13 15:12:32
Slowest loop: 73.97ms; fastest: 0.17ms
I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0
=== Storage ===
Free file entries: 10
SD card 0 detected, interface speed: 15.0MBytes/sec
SD card longest read time 1.4ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 83, maxWait 0ms, bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters = 0 -1, chamberHeaters = -1 -1
=== GCodes ===
Segments left: 0
Movement lock held by null
HTTP is idle in state(s) 0
Telnet is idle in state(s) 0
File is idle in state(s) 0
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
Daemon is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty.
=== Network ===
Slowest loop: 5.21ms; fastest: 0.02ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions
HTTP sessions: 1 of 8
Interface state active, link 100Mbps full duplex```

[0_1613229063924_config.g](Uploading 100%)[config.g](/assets/uploads/files/1613229649410-config.g)

@arhi Well at least something changed. I tried that as well as doing a full print. Now it says no calibration data so I assume my config isnt right yet?

@arhi said in How to setup the Bigtreetech smart filament sensor?:

and, def. works

need to be now properly configured (this is configured for my encoder) but to get you started

M591 D0 P7 C"e0stop" L0.5 R90:110 E3 S0   

now you need to setup your own L value and your own span .. for start it's disabled but will collect data, when you are happy with the way you calibrated it you enable it and enjoy

@omni 's U1 was not dead, I'm not sure how was he connecting it when it was not working but he did not burn the U1 so I just retraced the whole schematic (I desoldered the photo transistor pack to test it separately and make sure it's not ghosting my schematic, and then put it back after I was done, tested transistors separately with IR transmitter from a remote controller )

All in all, it works directly from 3v3 so all pins you need are on the E0STOP and E1STOP connectors on duet2ethernet (I assume the other duet's have similar/same connector)

So after a month I have a working sensor. Measured the signal pin and it now gives a 3.3v pulse like it should and wired it all up like you mentioned earlier.
Yet I keep getting no data received. I've switched to the other extruder port to check and changed all the settings multiple times yet nothing seems to be doing anything....