Accelerometer INT1 error

Piet · 22 Mar 2025, 21:32

Hi All,

I'm upgrading my printer a bit and decided to install an accelerometer, an lLIS3DSH to be exact.
I followed the instructions in the documentation for the connections and about 50% of the time it recognises the accelerometer and other times I'll get Error in start-up file macro line 50: Accelerometer not found on specified port.

If it gets recognised I can call it with M955 P0 and it responds with Accelerometer 0 type LIS3DH with orientation 20 samples at 1344Hz with 10-bit resolution, SPI frequency 2000000. I declared it with M955 P0 C"spi.cs2+spi.cs1"M955 P0 C"spi.cs2+spi.cs1"
I used an old Cat5e cable of ~70cm with the following connections:

VCC (3.3V) - Orange
GND - Orange/White
SCK - Green
SDA - Green/White
INT1 - Brown
SDO - Brown/White
CS - Blue

When I use the plugin and it makes the first move it will return the following error:

Error: M956: Failed to start accelerometer data collection: INT1 error

I checked the wiring and also used a multimeter to beep the wires.

My diagnostics:

 RepRapFirmware for Duet 2 WiFi/Ethernet version 3.5.4 (2024-11-24 10:43:42) running on Duet WiFi 1.02 or later
Board ID: 08DGM-956GU-DJMSN-6JKD2-3S46Q-TVQBH
Used output buffers: 6 of 26 (14 max)
Error in macro line 50 while starting up: Accelerometer not found on specified port
=== RTOS ===
Static ram: 23488
Dynamic ram: 72168 of which 32 recycled
Never used RAM 14936, free system stack 184 words
Tasks: NETWORK(2,nWait 6,13.9%,222) HEAT(3,nWait 5,0.0%,328) Move(4,nWait 5,0.0%,361) MAIN(1,running,85.3%,758) IDLE(0,ready,0.8%,29), total 100.0%
Owned mutexes:
=== Platform ===
Last reset 00:02:01 ago, cause: power up
Last software reset at 2025-03-22 22:10, reason: User, Gcodes spinning, available RAM 14936, slot 1
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0041f000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x00
MCU temperature: min 24.2, current 29.7, max 30.0
Supply voltage: min 24.1, current 24.3, max 24.6, under voltage events: 0, over voltage events: 0, power good: yes
Heap OK, handles allocated/used 99/2, heap memory allocated/used/recyclable 2048/52/0, gc cycles 0
Events: 0 queued, 0 completed
Driver 0: standstill, SG min n/a
Driver 1: standstill, SG min n/a
Driver 2: standstill, SG min n/a
Driver 3: standstill, SG min n/a
Driver 4: standstill, SG min n/a
Driver 5: 
Driver 6: 
Driver 7: 
Driver 8: 
Driver 9: 
Driver 10: 
Driver 11: 
Date/time: 2025-03-22 22:40:39
Cache data hit count 4277550534
Slowest loop: 7.27ms; fastest: 0.19ms
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: 20.0MBytes/sec
SD card longest read time 1.2ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 83, segments created 0, maxWait 0ms, bed compensation in use: none, height map offset 0.000, max steps late 0, min interval 0, bad calcs 0, ebfmin 0.00, ebfmax 0.00
no step interrupt scheduled
Moves shaped first try 0, on retry 0, too short 0, wrong shape 0, maybepossible 0
=== DDARing 0 ===
Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters 0 -1 -1 -1, chamber heaters -1 -1 -1 -1, ordering errs 0
=== GCodes ===
Movement locks 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
Q0 segments left 0
Code queue 0 is empty
=== Filament sensors ===
check 0 clear 493929
Extruder 0 sensor: no data received
=== Network ===
Slowest loop: 133.35ms; fastest: 0.00ms
Responder states: HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0)
HTTP sessions: 1 of 8
=== WiFi ===
Interface state: active
Module is connected to access point 
Failed messages: pending 0, notrdy 0, noresp 0
Firmware version 2.2.0
MAC address 60:01:94:73:5f:25
Module reset reason: Turned on by main processor, Vcc 3.36, flash size 4194304, free heap 34260
WiFi IP address 192.168.178.206
Signal strength -66dBm, channel 11, mode 802.11n, reconnections 0
Clock register 00002002
Socket states: 0 5 0 0 0 0 0 0

Can anyone give me some pointers or tell me what I'm doing wrong? That would be greatly appreciated!
Thanks in advance.

Kind regards, Piet.

dc42 · 24 Mar 2025, 14:20

@Piet please post a photo showing how you have connected that cable to the Duet.

	RepRapFirmware for Duet 2 WiFi/Ethernet version 3.5.4 (2024-11-24 10:43:42) running on Duet WiFi 1.02 or later
	Board ID: 08DGM-956GU-DJMSN-6JKD2-3S46Q-TVQBH
	Used output buffers: 6 of 26 (14 max)
	Error in macro line 50 while starting up: Accelerometer not found on specified port
	=== RTOS ===
	Static ram: 23488
	Dynamic ram: 72168 of which 32 recycled
	Never used RAM 14936, free system stack 184 words
	Tasks: NETWORK(2,nWait 6,13.9%,222) HEAT(3,nWait 5,0.0%,328) Move(4,nWait 5,0.0%,361) MAIN(1,running,85.3%,758) IDLE(0,ready,0.8%,29), total 100.0%
	Owned mutexes:
	=== Platform ===
	Last reset 00:02:01 ago, cause: power up
	Last software reset at 2025-03-22 22:10, reason: User, Gcodes spinning, available RAM 14936, slot 1
	Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0041f000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a
	Error status: 0x00
	MCU temperature: min 24.2, current 29.7, max 30.0
	Supply voltage: min 24.1, current 24.3, max 24.6, under voltage events: 0, over voltage events: 0, power good: yes
	Heap OK, handles allocated/used 99/2, heap memory allocated/used/recyclable 2048/52/0, gc cycles 0
	Events: 0 queued, 0 completed
	Driver 0: standstill, SG min n/a
	Driver 1: standstill, SG min n/a
	Driver 2: standstill, SG min n/a
	Driver 3: standstill, SG min n/a
	Driver 4: standstill, SG min n/a
	Driver 5:
	Driver 6:
	Driver 7:
	Driver 8:
	Driver 9:
	Driver 10:
	Driver 11:
	Date/time: 2025-03-22 22:40:39
	Cache data hit count 4277550534
	Slowest loop: 7.27ms; fastest: 0.19ms
	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: 20.0MBytes/sec
	SD card longest read time 1.2ms, write time 0.0ms, max retries 0
	=== Move ===
	DMs created 83, segments created 0, maxWait 0ms, bed compensation in use: none, height map offset 0.000, max steps late 0, min interval 0, bad calcs 0, ebfmin 0.00, ebfmax 0.00
	no step interrupt scheduled
	Moves shaped first try 0, on retry 0, too short 0, wrong shape 0, maybepossible 0
	=== DDARing 0 ===
	Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
	=== Heat ===
	Bed heaters 0 -1 -1 -1, chamber heaters -1 -1 -1 -1, ordering errs 0
	=== GCodes ===
	Movement locks 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
	Q0 segments left 0
	Code queue 0 is empty
	=== Filament sensors ===
	check 0 clear 493929
	Extruder 0 sensor: no data received
	=== Network ===
	Slowest loop: 133.35ms; fastest: 0.00ms
	Responder states: HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0)
	HTTP sessions: 1 of 8
	=== WiFi ===
	Interface state: active
	Module is connected to access point
	Failed messages: pending 0, notrdy 0, noresp 0
	Firmware version 2.2.0
	MAC address 60:01:94:73:5f:25
	Module reset reason: Turned on by main processor, Vcc 3.36, flash size 4194304, free heap 34260
	WiFi IP address 192.168.178.206
	Signal strength -66dBm, channel 11, mode 802.11n, reconnections 0
	Clock register 00002002
	Socket states: 0 5 0 0 0 0 0 0