I2c Table is full, but i don't have any i2c device conected.

[omarinho]

What is going on?
The i2c table is full of addresses but I don't have any device connected.
Can anyone help me?

I'm trying to use a BPM085 device.
Raspberry pi 2
cat /etc/debian_version 8.0

pi@OM_Raspi ~ $ sudo i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f
10: 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20: 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
30: 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f
40: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
50: 50 51 52 53 54 55 56 57 58 59 5a 5b 5c 5d 5e 5f
60: 60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f
70: 70 71 72 73 74 75 76 77

[plugwash]

do you have appropriate pullups in place?

[6by9]

SDA is shorted to ground, so it is seeing an ack to everything.

[omarinho]

Thanks guys for replying.
I'm still with the same trouble.
My setup of sensors:
3 DS18B20 (one wire) on gpio 24 with pullup resistor;
1 DHT22 on gpio 22 with pullup resistor;
Everything on 3.3v.
The BPM085 isn't pluggued.
SDA is disconnected. Not shorted to ground.
-------------------------------

The CONFIG.TXT:

pi@OM_Raspi ~ $ sudo cat /boot/config.txt
# For more options and information see
# http://www.raspberrypi.org/documentatio ... fig-txt.md
# Some settings may impact device functionality. See link above for details

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720

# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4

# uncomment for composite PAL
#sdtv_mode=2

#uncomment to overclock the arm. 700 MHz is the default.
arm_freq=900

# Uncomment some or all of these to enable the optional hardware interfaces
dtparam=i2c1=on
dtparam=i2c_arm=on
dtparam=i2c_arm_baudrate=100000
dtparam=spi=on
dtoverlay=w1-gpio,gpiopin=24
dtparam=i2s=on
#enable_uart=1


# Uncomment this to enable the lirc-rpi module
#dtoverlay=lirc-rpi

# Additional overlays and parameters are documented /boot/overlays/README


# Enable audio (added by raspberrypi-sys-mods)
dtparam=audio=on

core_freq=500
sdram_freq=500
over_voltage=2

--------------------------------------------------------------
The file '/etc/modules' looks like this:

pi@OM_Raspi ~ $ cat /etc/modules
# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.


i2c-bcm2708
i2c-dev

-----------------------------------------------------------------
Still showing the table full
I don't have any i2c device connected yet.


Last login: Wed Dec 14 11:02:41 2016
pi@OM_Raspi ~ $ sudo i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f
10: 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20: 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
30: 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f
40: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
50: 50 51 52 53 54 55 56 57 58 59 5a 5b 5c 5d 5e 5f
60: 60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f
70: 70 71 72 73 74 75 76 77

Any advice?

[PeterO]

Put a pull-up on SDA.
PeterO

[DougieLawson]

It looks like you've got an I²C device on the bus that's permanently pulling SDA to GND. Check your wiring, have you got a device with SCL & SDA reversed.

Have you put your 1-wire device on the wrong pin (#5 rather than #7)?

http://pinout.xyz

[6by9]

/Etc/modules should NOT include i2c_bcm2708. Device tree should load that for you.

[omarinho]

Put a pull-up on SDA.
PeterO

Its already done.

[joan]

You have wired something incorrectly. Without a photo we can only guess at what.

[omarinho]

It looks like you've got an I²C device on the bus that's permanently pulling SDA to GND. Check your wiring, have you got a device with SCL & SDA reversed.

Have you put your 1-wire device on the wrong pin (#5 rather than #7)?

http://pinout.xyz

Thanks for your suport.
The SDA and SCL isn't reverse and using a pullup resistor.
the 1-wire was on gpio 24 (pin 18) and I changed to gpio 26 (pin 17), using a pullup resistor too.

I run some test:
1) I disconnect all devices and the i2c table runs ok, complete empty. I connect the BPM085 and the table show up just with te address 77 (0x77 = BPM085) . Fine.
2) I connect the DHT22 on gpio 22 (pin 15), reboot the Rpi and the DHT22 looks like fine. But the Table of i2cdetect show up full again.
3) I disconnect the DHT, reboot, then the table show up fine, just with address 77 (0x77 = BMP085) again.
4) I connect the 3 BS18B20 (1-wire) gpio 24 (pin 18) , reboot, and the table i2c is full again.
5) I disconnect the 3 BS18B20 and conect a single led on gpio 5 (pin 29) restart the Pi and the table show up full again, and again and again and again.

Conclusion for me:
This device runs just lonely. They don't like companion. I guess...It's so sad...

Another one advice, please???

[omarinho]

/Etc/modules should NOT include i2c_bcm2708. Device tree should load that for you.

Tanks for your suport.
I removed the i2c_bcm2708 from etc/modules.


pi@OM_Raspi ~ $ cat /etc/modules
# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.

i2c-dev

But still with the same problem.

pi@OM_Raspi ~ $ sudo i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f
10: 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20: 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
30: 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f
40: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
50: 50 51 52 53 54 55 56 57 58 59 5a 5b 5c 5d 5e 5f
60: 60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f
70: 70 71 72 73 74 75 76 77

[DougieLawson]

Where's the photo of your wiring. Nobody can help without that.

[omarinho]

Where's the photo of your wiring. Nobody can help without that.

Photos on http://www.omarinho.com.br/bpm085.html

Everything was double-checked . All single connection, condutivity etc.
photo #1
This photo is only with BPM085 connected.
SDA >> gpio 02 (pin 03) yelow wire.
SCL >> SCL gpio 03 (pin 05) orange wire.
Pullup resistor 10k btw SDA and 3.3v.
GND brown wire
and 3.3v red wire.

photo #2
Screen with Home Assistant running showing no devices connected and terminal shows that bpm085 shows up : address 77 (0x77)

photo #3
Devices connected : BPM085 and
DHT22: 3.3v, gnd, gpio22 (pin15)
DS18b20 (one wire): 3.3v, gnd, gpio 26 (pin37)

Photo #4
Screen showing Home Assistant with DHT working fine and Terminal showing i2c table full of address.

photo #5
Screen showing Home Assistant with DHT and 2 DS18b20 working fine and Terminal showing i2c full of address.

[DougieLawson]

Can't see how that's wired to your RPi.

[BMS Doug]

Its hard to make out any wiring details from those photos.

[joan]

As a matter of interest could you enter the following commands when you see the full I2C table.

sudo pigpiod
pigs mg 2 mg 3

[omarinho]

As a matter of interest could you enter the following commands when you see the full I2C table.

sudo pigpiod
pigs mg 2 mg 3

Thanks for your patience.

Last login: Thu Dec 15 09:10:19 2016
pi@OM_Raspi ~ $ sudo i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f
10: 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20: 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
30: 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f
40: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
50: 50 51 52 53 54 55 56 57 58 59 5a 5b 5c 5d 5e 5f
60: 60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f
70: 70 71 72 73 74 75 76 77
pi@OM_Raspi ~ $ sudo pigpiod
pi@OM_Raspi ~ $ pigs mg 2 mg 3
1
4

[joan]

Enter the following command and try the i2cdetect again.

pigs m 2 0 # zero

[6by9]

Enter the following command and try the i2cdetect again.

pigs m 2 0 # zero

0? That appears to set it to an input, when it needs to be ALT0 for I2C, which would be a value of 4.

[joan]

Enter the following command and try the i2cdetect again.

pigs m 2 0 # zero

0? That appears to set it to an input, when it needs to be ALT0 for I2C, which would be a value of 4.

The pigs m command uses r for input, w for output, 0-5 for ALT0 - ALT5.

[omarinho]

Enter the following command and try the i2cdetect again.

pigs m 2 0 # zero

pi@OM_Raspi ~ $ pigs m 2 0 # zero
pi@OM_Raspi ~ $ sudo i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- 77

It's Work! Great! Thank you so very much, joan .
What happened? Teach me, I'm an eternal apprentice.

[joan]

@omarinho

I think our current guess would be your Home Assistant software is mucking up I2C by changing GPIO 2 (SDA) from mode ALT0 (I2C) to mode write.

You probably need to ask Home Assistant for a fix.

[omarinho]

@omarinho

I think our current guess would be your Home Assistant software is mucking up I2C by changing GPIO 2 (SDA) from mode ALT0 (I2C) to mode write.

You probably need to ask Home Assistant for a fix.

Thank you again. Have a great nice day.

[omarinho]

All of you who tried to help me . Thanks so much. Joan solved the problem.
Have all of you a nice day.