# Manta MP8 v2 shutdown: i2c timeout

**URL:** <https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892>\
**Category:** General Discussion\
**Created:** [September 18, 2024, 6:55pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892 "2024-09-18T18:55:09Z")\
**Posts on this page:** 20\
**Page:** 3

<div class="post-metadata">

**Author:** ![borysne](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/borysne/32/14612_2.png) [@borysne](https://klipper.discourse.group/u/borysne)\
**Post date:** [September 20, 2024, 3:03pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/41 "2024-09-20T15:03:25Z")

</div>

thank you for participating in this too)

> [@Sineos](#):
>
> This does not seem to be a valid bus name. Should probably be  
> `i2c_bus: i2c1`

Where should I indicate the connection pins?  
You don’t need Eddy USB. For Eddy coil you need specify pins

 ![w](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/d/d090015c1e77a45c66ead7427a8ebb706d419440.jpeg)

---

<div class="post-metadata">

**Author:** ![Sineos](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/sineos/32/18_2.png) [@Sineos](https://klipper.discourse.group/u/Sineos)\
**Post date:** [September 20, 2024, 3:08pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/42 "2024-09-20T15:08:36Z")

</div>

> [@borysne](#):
>
> Where should I indicate the connection pins?

Nowhere. The corresponding pins are bound to the bus. See [klipper/src/stm32/i2c.c at 87ac69363aecd51c282999f8bf0f5c3513f58ed2 · Klipper3d/klipper · GitHub](https://github.com/Klipper3d/klipper/blob/87ac69363aecd51c282999f8bf0f5c3513f58ed2/src/stm32/i2c.c#L20-L33)

---

<div class="post-metadata">

**Author:** ![borysne](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/borysne/32/14612_2.png) [@borysne](https://klipper.discourse.group/u/borysne)\
**Post date:** [September 20, 2024, 3:15pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/43 "2024-09-20T15:15:41Z")

</div>

> [@Sineos](#):
>
> Nowhere. The corresponding pins are bound to the bus. See [klipper/src/stm32/i2c.c at 87ac69363aecd51c282999f8bf0f5c3513f58ed2 · Klipper3d/klipper · GitHub](https://github.com/Klipper3d/klipper/blob/87ac69363aecd51c282999f8bf0f5c3513f58ed2/src/stm32/i2c.c#L20-L33)

 ![s](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/7/79c2cf3f9bde532e0982223d53333d665abf0d0f.jpeg)

> i2c\_bus: i2c1 #\_PB6\_PB7 # I2C bus actually connected to Eddy Coil

```auto
**mcu sb2240** (stm32g0b1xx)

Version: v0.11.0-479-g95747542

Load: 0.01, Awake: 0.00, Freq: 64 MHz, Temp: 32°C

```

maybe the firmware version is not suitable?

---

<div class="post-metadata">

**Author:** ![Sineos](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/sineos/32/18_2.png) [@Sineos](https://klipper.discourse.group/u/Sineos)\
**Post date:** [September 20, 2024, 3:31pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/44 "2024-09-20T15:31:39Z")

</div>

Interesting. Color me surprised.

---

<div class="post-metadata">

**Author:** ![BevanWeiss](https://avatars.discourse-cdn.com/v4/letter/b/c5a1d2/32.png) [@BevanWeiss](https://klipper.discourse.group/u/BevanWeiss)\
**Post date:** [September 20, 2024, 3:33pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/45 "2024-09-20T15:33:18Z")

</div>

> [@Sineos](#):
>
> This does not seem to be a valid bus name. Should probably be  
> `i2c_bus: i2c1`

For these mcu, the i2c bus definitions do indeed include the pin assignments in the enumeration string. So `i2c_bus: i2c1_PB6_PB7` is ‘correct’.

```auto
  DECL_ENUMERATION("i2c_bus", "i2c1_PB6_PB7", 0);
  DECL_ENUMERATION("i2c_bus", "i2c1_PB8_PB9", 1);
  DECL_ENUMERATION("i2c_bus", "i2c1_PA9_PA10", 2);
  DECL_ENUMERATION("i2c_bus", "i2c2_PB10_PB11", 3);
  DECL_ENUMERATION("i2c_bus", "i2c2_PB13_PB14", 4);
  #ifdef I2C3
    DECL_ENUMERATION("i2c_bus", "i2c3_PB3_PB4", 5);
    DECL_ENUMERATION("i2c_bus", "i2c3_PC0_PC1", 6);
  #endif

```

You should match the firmware version of the mcu to the version of your Klippy install.

10k pullups to 3v3 for the SDA / SCL should be ‘ok’, even if there are programmable pullups from the mcu in use also. Are you sure you’ve got the SDA / SCL wired to the correct points on the Eddy Coil.  
They’re not interchangeable signals, they need to be connected SDA to SDA and SCL to SCL…

---

<div class="post-metadata">

**Author:** ![borysne](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/borysne/32/14612_2.png) [@borysne](https://klipper.discourse.group/u/borysne)\
**Post date:** [September 20, 2024, 3:42pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/46 "2024-09-20T15:42:53Z")

</div>

> [@BevanWeiss](#):
>
> They’re not interchangeable signals, they need to be connected SDA to SDA and SCL to SCL…

 ![connection](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/7/7f685c3ca86f342bd69dacd27ec437d2ba35ba07.jpeg)

---

<div class="post-metadata">

**Author:** ![borysne](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/borysne/32/14612_2.png) [@borysne](https://klipper.discourse.group/u/borysne)\
**Post date:** [September 20, 2024, 3:47pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/47 "2024-09-20T15:47:52Z")

</div>

> [@BevanWeiss](#):
>
> You should match the firmware version of the mcu to the version of your Klippy install.

 ![v](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/5/52ea3d27233ea24fb8fadd84f8b3c3cb44c2e109.jpeg)

---

<div class="post-metadata">

**Author:** ![borysne](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/borysne/32/14612_2.png) [@borysne](https://klipper.discourse.group/u/borysne)\
**Post date:** [September 20, 2024, 4:18pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/48 "2024-09-20T16:18:29Z")

</div>

> [@mykepredko](#):
>
> Again, looking at the EBB SB2240’s schematic you can see the 10k pull ups:
> 
> ![image](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/7/79818994f602e397b252a37175ba953427c26a32.png)

I don’t know what to think anymore! I’ve run out of options to solve the problem(((  
I’m looking at this diagram of the pull-up resistor and I see that on the other side there is a resistor 1k and a capacitor to GND  
maybe that’s the problem???

---

<div class="post-metadata">

**Author:** ![borysne](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/borysne/32/14612_2.png) [@borysne](https://klipper.discourse.group/u/borysne)\
**Post date:** [September 20, 2024, 4:23pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/49 "2024-09-20T16:23:35Z")

</div>

> [@borysne](#):
>
> > [@borysne](#):
> >
> > BUS\_PINS\_i2c1\_PB8\_PB9=PB8,PB9
> 
> use BLTouch Connector

since you and I are out of ideas  
I’m moving to plan B. I’ll connect to BLTouch Connector P9  
pins: PB8,PB9

---

<div class="post-metadata">

**Author:** ![mykepredko](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/mykepredko/32/2085_2.png) [@mykepredko](https://klipper.discourse.group/u/mykepredko)\
**Post date:** [September 20, 2024, 4:34pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/50 "2024-09-20T16:34:19Z")

</div>

> [@borysne](#):
>
> > [@mykepredko](#):
> >
> > Again, looking at the EBB SB2240’s schematic you can see the 10k pull ups:
> > 
> > ![image](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/7/79818994f602e397b252a37175ba953427c26a32.png)
> 
> I don’t know what to think anymore! I’ve run out of options to solve the problem(((  
> I’m looking at this diagram of the pull-up resistor and I see that on the other side there is a resistor and a capacitor to GND  
> maybe that’s the problem???

No. They should be fine - I wouldn’t have suggested them if I thought the 1k and cap were issues. I might ask you to pull the caps, but I want to see what the I2C waveforms look like first.

Can we go back to what I last asked you for?

1. Give me an accurate state of where things are now and what you’ve done. I _think_ you’re using PB6/PB7, as I suggested but have added additional resistors to the wiring. It might be helpful to provide a drawing/photograph to show exactly what the state of things are.
2. When you do a new experiment, show the oscilloscope view of the waveforms. That is really helpful to understanding what is happening as well as getting an idea whether or not there’s a chance that things will work.
3. Stop posting abbreviated/edited `klipyy.log` files. I would really like to see the complete file. If you think it is too large (although you should be able to .zip it and post it here), then do a `Reset` on the Mainsail “Machine” page and then post the new file after you’ve run a new test.

You seem to have indicated that you just have PB6/PB7 wired. I would still like a picture of what you have done and how things are wired.

You indicated that there is a problem with getting 'scope pictures of the data. With the soldering/desoldering (I was expecting that you would only use plug in connectors) I think it’s really critical to see what’s going on the lines. I don’t understand why you are unable to get a shot of what’s going on the line.

I’m looking at your latest `klippy.log` and the most recent error indicates that you are not getting a response from the I2C. This means that I would really like to see physically what you have (ie pictures) done and electrically ('scope images).

> [@borysne](#):
>
> > [@borysne](#):
> >
> > > [@borysne](#):
> > >
> > > BUS\_PINS\_i2c1\_PB8\_PB9=PB8,PB9
> > 
> > use BLTouch Connector
> 
> since you and I are out of ideas  
> I’m moving to plan B. I’ll connect to BLTouch Connector P9  
> pins: PB8,PB9

If I can make an observation, you are thrashing. I know what I’m asking for is pedantic but I think it’s important we work through things step by step and not get ahead and change things without fully understanding what’s going on currently or completely responding to my requests.

We’ll get there. There’s a reason for everything I’m asking you to do so please follow my instructions and requests before doing anything else.

I don’t mind questions, just be patient because I’m not sitting at the computer waiting for you to come back with information or requests.

---

<div class="post-metadata">

**Author:** ![borysne](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/borysne/32/14612_2.png) [@borysne](https://klipper.discourse.group/u/borysne)\
**Post date:** [September 20, 2024, 4:53pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/51 "2024-09-20T16:53:18Z")

</div>

> [@mykepredko](#):
>
> You seem to have indicated that you just have PB6/PB7 wired. I would still like a picture of what you have done and how things are wired.
> 
> You indicated that there is a problem with getting 'scope pictures of the data. With the soldering/desoldering (I was expecting that you would only use plug in connectors) I think it’s really critical to see what’s going on the lines. I don’t understand why you are unable to get a shot of what’s going on the line.

ok, I won’t move on to plan B for now. )))

1. this is what my connection looks like now. !!!no resistors to the wiring!!!

 ![connection](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/7/7f685c3ca86f342bd69dacd27ec437d2ba35ba07.jpeg)

 ![20240920_194316](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/7/7bf7050e463e6af97a568bda35ac42cc98266450.jpeg)  
 ![20240920_194307](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/c/cbedd75783a3cf34b30becf6e5ee6cbd302f03b4.jpeg)  
 ![pic_39_111](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/9/9172d67793d8c2acb390deea02985898c43892ca.jpeg)

nothing happens on the oscilloscope! !!!voltage 3.36v!!!

until the bus transmission starts! but the transmission does not start, a Klipper error appears

> [@mykepredko](#):
>
> Stop posting abbreviated/edited `klipyy.log` files. I would really like to see the complete file. If you think it is too large (although you should be able to .zip it and post it here), then do a `Reset` on the Mainsail “Machine” page and then post the new file after you’ve run a new test.

[klippy (8).zip](https://klipper.discourse.group/uploads/short-url/fS2jix13orar5Q5aWk55vhbHPWz.zip) (4.0 MB)

---

<div class="post-metadata">

**Author:** ![mykepredko](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/mykepredko/32/2085_2.png) [@mykepredko](https://klipper.discourse.group/u/mykepredko)\
**Post date:** [September 20, 2024, 5:15pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/52 "2024-09-20T17:15:42Z")

</div>

Okay, this is helpful.

Let’s work through this until we see the SDA/SCL lines wiggling.

It looks like to me that there is a software issue in how the pins are specified - my first thought is that the I2C pins on the EBB SB2240 are not being set up correctly.

@nefelim4ag I think you’re the expert here - do you see anything wrong with how @borysne has specified the Eddy Coil interface. The `printer.cfg` statement (taken from the `klippy.log`) is:

```auto
[probe_eddy_current btt_eddy]
sensor_type = ldc1612
z_offset = 1
i2c_mcu = sb2240
i2c_bus = i2c1_PB6_PB7
x_offset = 0
y_offset = 20
data_rate = 500
calibrate = 
	0.050000:3207699.594,0.100000:3207141.189,0.150000:3206564.339,
	0.200000:3205998.528,0.250000:3205421.329,0.300000:3204883.073,
	0.350000:3204292.184,0.400000:3203773.146,0.450000:3203294.481,
	0.500000:3202757.730,0.550000:3202274.951,0.600000:3201774.550,
	0.650000:3201297.859,0.700000:3200833.363,0.750000:3200338.938,
	0.800000:3199845.502,0.850000:3199407.159,0.900000:3198946.967,
	0.950000:3198530.107,1.000000:3198082.834,1.050000:3197664.912,
	1.100000:3197276.036,1.150000:3196856.075,1.200000:3196451.244,
	1.250000:3196078.298,1.300000:3195679.907,1.350000:3195317.339,
	1.400000:3194942.274,1.450000:3194586.297,1.500000:3194228.212,
	1.550000:3193862.701,1.600000:3193531.575,1.650000:3193212.875,
	1.700000:3192868.353,1.750000:3192565.119,1.800000:3192225.248,
	1.850000:3191914.767,1.900000:3191612.717,1.950000:3191313.087,
	2.000000:3190989.028,2.050000:3190716.184,2.100000:3190420.831,
	2.150000:3190181.490,2.200000:3189895.656,2.250000:3189617.857,
	2.300000:3189364.023,2.350000:3189101.713,2.400000:3188853.082,
	2.450000:3188591.115,2.500000:3188374.243,2.550000:3188117.857,
	2.600000:3187888.238,2.650000:3187649.940,2.700000:3187435.040,
	2.750000:3187194.958,2.800000:3186970.903,2.850000:3186768.375,
	2.900000:3186547.824,2.950000:3186341.320,3.000000:3186143.320,
	3.050000:3185920.156,3.100000:3185734.683,3.150000:3185529.662,
	3.200000:3185330.516,3.250000:3185135.867,3.300000:3184957.732,
	3.350000:3184787.230,3.400000:3184617.410,3.450000:3184430.081,
	3.500000:3184274.324,3.550000:3184080.004,3.600000:3183911.964,
	3.650000:3183775.656,3.700000:3183615.235,3.750000:3183438.456,
	3.800000:3183266.390,3.850000:3183143.953,3.900000:3182988.757,
	3.950000:3182845.322,4.000000:3182721.499,4.050000:3182564.965
reg_drive_current = 15
calibration_temp = 0.000000

```

Things look right `sb2240` is the CAN device and PB6/PB7 are I2C1 in the STM32G0B1. I can confirm that in the `klippy.log` on the connection statement:

```auto
MCU 'sb2240' config: ADC_MAX=4095 BUS_PINS_i2c1_PA9_PA10=PA9,PA10 BUS_PINS_i2c1_PB6_PB7=PB6,PB7...

```

The only thing I can think of is that the PB6/PB7 being accessed are on the Manta M8P V2.0 but that should be specified by the `i2c_mcu` parameter - correct?

---

<div class="post-metadata">

**Author:** ![borysne](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/borysne/32/14612_2.png) [@borysne](https://klipper.discourse.group/u/borysne)\
**Post date:** [September 20, 2024, 5:24pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/53 "2024-09-20T17:24:18Z")

</div>

> [@mykepredko](#):
>
> The only thing I can think of is that the PB6/PB7 being accessed are on the Manta M8P V2.0 but that should be specified by the `i2c_mcu` parameter - correct?

is this a question for me? or @nefelim4ag

if the question is for me, then I think that everything is correct in the config! we indicate which MCU we are addressing  
i2c\_mcu = sb2240  
i2c\_bus = i2c1\_PB6\_PB7

when I was connected directly to the Manta MP8 v2. board via a long cable, the config was like this:  
i2c\_mcu: mcu  
i2c\_bus: i2c3\_PA8\_PC9

It’s strange where this calibration comes from if I’ve never managed to launch Eddy in a new pin configuration  
This is probably an old calibration when the connection was via directly Manta mp8

> [probe\_eddy\_current btt\_eddy]  
> sensor\_type = ldc1612  
> z\_offset = 1  
> i2c\_mcu = sb2240  
> i2c\_bus = i2c1\_PB6\_PB7  
> x\_offset = 0  
> y\_offset = 20  
> data\_rate = 500  
> calibrate =  
> 0.050000:3207699.594,0.100000:3207141.189,0.150000:3206564.339,  
> 0.200000:3205998.528,0.250000:3205421.329,0.300000:3204883.073,  
> 0.350000:3204292.184,0.400000:3203773.146,0.450000:3203294.481,  
> 0.500000:3202757.730,0.550000:3202274.951,0.600000:3201774.550,  
> 0.650000:3201297.859,0.700000:3200833.363,0.750000:3200338.938,  
> 0.800000:3199845.502,0.850000:3199407.159,0.900000:3198946.967,  
> 0.950000:3198530.107,1.000000:3198082.834,1.050000:3197664.912,  
> 1.100000:3197276.036,1.150000:3196856.075,1.200000:3196451.244,  
> 1.250000:3196078.298,1.300000:3195679.907,1.350000:3195317.339,  
> 1.400000:3194942.274,1.450000:3194586.297,1.500000:3194228.212,  
> 1.550000:3193862.701,1.600000:3193531.575,1.650000:3193212.875,  
> 1.700000:3192868.353,1.750000:3192565.119,1.800000:3192225.248,  
> 1.850000:3191914.767,1.900000:3191612.717,1.950000:3191313.087,  
> 2.000000:3190989.028,2.050000:3190716.184,2.100000:3190420.831,  
> 2.150000:3190181.490,2.200000:3189895.656,2.250000:3189617.857,  
> 2.300000:3189364.023,2.350000:3189101.713,2.400000:3188853.082,  
> 2.450000:3188591.115,2.500000:3188374.243,2.550000:3188117.857,  
> 2.600000:3187888.238,2.650000:3187649.940,2.700000:3187435.040,  
> 2.750000:3187194.958,2.800000:3186970.903,2.850000:3186768.375,  
> 2.900000:3186547.824,2.950000:3186341.320,3.000000:3186143.320,  
> 3.050000:3185920.156,3.100000:3185734.683,3.150000:3185529.662,  
> 3.200000:3185330.516,3.250000:3185135.867,3.300000:3184957.732,  
> 3.350000:3184787.230,3.400000:3184617.410,3.450000:3184430.081,  
> 3.500000:3184274.324,3.550000:3184080.004,3.600000:3183911.964,  
> 3.650000:3183775.656,3.700000:3183615.235,3.750000:3183438.456,  
> 3.800000:3183266.390,3.850000:3183143.953,3.900000:3182988.757,  
> 3.950000:3182845.322,4.000000:3182721.499,4.050000:3182564.965  
> reg\_drive\_current = 15  
> calibration\_temp = 0.000000

---

<div class="post-metadata">

**Author:** ![mykepredko](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/mykepredko/32/2085_2.png) [@mykepredko](https://klipper.discourse.group/u/mykepredko)\
**Post date:** [September 20, 2024, 6:18pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/54 "2024-09-20T18:18:14Z")

</div>

The question was for @nefelim4ag

Anyway, I didn’t realize that wasn’t the original `printer.cfg` statement.

Could you try the basic one you used with the Manta M8P?

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**Author:** ![borysne](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/borysne/32/14612_2.png) [@borysne](https://klipper.discourse.group/u/borysne)\
**Post date:** [September 20, 2024, 6:25pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/55 "2024-09-20T18:25:10Z")

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> [@mykepredko](#):
>
> Could you try the basic one you used with the Manta M8P?

connect Eddie back to Manta mp8?  
to check if Eddy works after everything we did to him)

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**Author:** ![mykepredko](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/mykepredko/32/2085_2.png) [@mykepredko](https://klipper.discourse.group/u/mykepredko)\
**Post date:** [September 20, 2024, 6:30pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/56 "2024-09-20T18:30:22Z")

</div>

No, the same `printer.cfg` statement you had with the Manta M8P V2 but with specify the `sb2240` and `i2c1_PB6_PB7`.

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**Author:** ![borysne](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/borysne/32/14612_2.png) [@borysne](https://klipper.discourse.group/u/borysne)\
**Post date:** [September 20, 2024, 6:37pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/57 "2024-09-20T18:37:16Z")

</div>

> [@mykepredko](#):
>
> No, the same `printer.cfg` statement you had with the Manta M8P V2 but with specify the `sb2240` and `i2c1_PB6_PB7`.

so what do we do!?  
connect eddy to manta as before?  
what bus ports to specify?

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**Author:** ![borysne](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/borysne/32/14612_2.png) [@borysne](https://klipper.discourse.group/u/borysne)\
**Post date:** [September 20, 2024, 6:55pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/58 "2024-09-20T18:55:36Z")

</div>

> [@mykepredko](#):
>
> Could you try the basic one you used with the Manta M8P?

I connected everything as it was before, Eddy directly to the Manta  
config:

```auto
i2c_mcu: mcu
i2c_bus: i2c3_PA8_PC9

```

I turned on the test PROBE\_ACCURACY and everything works!!!

> probe accuracy results: maximum 0.699613, minimum 0.692887, range 0.006725, average 0.696340, median 0.696603, standard deviation 0.002284

So everything is fine with Eddy! I’m connecting everything back according to our plan!  
using PB6/PB7 on SB2240

```auto
i2c_mcu: sb2240 # MCU name of the actual board connected to Eddy Coil
i2c_bus: i2c1_PB6_PB7 # I2C bus actually connected to Eddy Coil

```

And so this config doesn’t work

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**Author:** ![mykepredko](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/mykepredko/32/2085_2.png) [@mykepredko](https://klipper.discourse.group/u/mykepredko)\
**Post date:** [September 20, 2024, 7:26pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/59 "2024-09-20T19:26:37Z")

</div>

What do you mean, “this config doesn’t work”? Are you scoping the lines?

Could you please share your `printer.cfg` with me?

I was asking that you continue with the the SB2240 but use your original configuration information that was in the Manta M8P V2 but didn’t have the “calibration” information.

Please be as descriptive as possible and include as much information as possible, even if it seems redundant.

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**Author:** ![borysne](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/borysne/32/14612_2.png) [@borysne](https://klipper.discourse.group/u/borysne)\
**Post date:** [September 20, 2024, 7:38pm UTC](https://klipper.discourse.group/t/manta-mp8-v2-shutdown-i2c-timeout/18892/60 "2024-09-20T19:38:13Z")

</div>

continue with the the SB2240

1. I use original configuration that was in the Manta M8P V2 when i connected to eddy directly
2. the “calibration” information - I can go in `printer.cfg` and try to delete it!  
but then after deleting the sensor i need to calibrate it! and I won’t be able to do it because we have problems with i2c

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