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

joan wrote:@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.

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: -- -- -- -- -- -- -- --...

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 1...

Hi, On /boot/config.txt especify de one-wire gpio pin sudo nano /boot/config.txt add this: dtoverlay=w1-gpio,gpiopin=26 I'm using gpiopin 26 , do your choice. On cd /sys/bus/w1/devices, check out your w1 devices, normaly the ds18b20 apears 28-00000056bxxxx "xxxx" is the identification to your DS18b2...

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)...

/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 ...

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 an...

PeterO wrote:Put a pull-up on SDA.
PeterO

Its already done.

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. ------------------------------- Th...

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...