Re: [beagleboard] Grove temperature sensor on Beaglebone Black

[Siddharth Amaravadi]

Thank You guys for all the help. I resolved my issue.

Thank You Jason for suggesting me the voltage divider.

Robert, thank you so very much for every thing. You helped me figure out
the issue that it wasn't I2C and it can be read only through ADC and then
the voltage divider.



On Thu, Sep 15, 2016 at 5:34 AM, Stephane Charette <
stephanechare...@gmail.com> wrote:

> I have done some work with that sensor on a BBG:
> https://www.ccoderun.ca/sg++/api/classSG_1_1TemperatureSensor.html#details
>
> ...connected to this Grove ADC:  https://www.ccoderun.ca/sg++/
> api/classSG_1_1I2CADC.html#details
>
> The problem is the numbers I was retrieving didn't make sense, and I
> haven't gone back to it since.  Shortly after I moved on, I discovered that
> all the reference information for that sensor assumes 5v, and only 3.3v is
> available through the ADC.  But my memory is fuzzy, and I'm a newbie at
> this stuff, so double check.
>
> Stéphane
>
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Re: [beagleboard] Grove temperature sensor on Beaglebone Black

[Stephane Charette]

I have done some work with that sensor on a BBG: 
 https://www.ccoderun.ca/sg++/api/classSG_1_1TemperatureSensor.html#details

...connected to this Grove ADC: 
 https://www.ccoderun.ca/sg++/api/classSG_1_1I2CADC.html#details

The problem is the numbers I was retrieving didn't make sense, and I 
haven't gone back to it since.  Shortly after I moved on, I discovered that 
all the reference information for that sensor assumes 5v, and only 3.3v is 
available through the ADC.  But my memory is fuzzy, and I'm a newbie at 
this stuff, so double check.

Stéphane

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Re: [beagleboard] Grove temperature sensor on Beaglebone Black

[Siddharth Amaravadi]

Robert, thank you once again, just a small correction I'm using a
Beaglebone Black. When I tried referring to the officialpage of seeed
studio I found this
http://wiki.seeedstudio.com/images/thumb/8/8e/Grove_Temperature_Sensor_Hw_connect.jpg/600px-Grove_Temperature_Sensor_Hw_connect.jpg

So i connected the Temperature Sensor to the I2C bus.

Please correct me if I'm wrong and let me know any other inputs which can
solve my problem.

Thanks
Siddharth

On Thu, Sep 15, 2016 at 2:54 AM, Robert Nelson 
wrote:

>
>
> On Wed, Sep 14, 2016 at 3:41 PM, Siddharth Amaravadi <
> siddharth.amarav...@gmail.com> wrote:
>
>>
>> 
>> Thank you for the response, but the pins are named as SIG and NC on the
>> board. These are the pins that I connected to the P9_19 and P9_20
>> respectively
>>
>> SIG -> P9_19
>> NC  -> P9_20
>>
>> The sensor related information can be found at
>> http://wiki.seeedstudio.com/wiki/Grove_-_Temperature_Sensor_V1.2
>>
>
> That senor out put's analog data... It's not i2c, spi, or usart...
>
> and don't even think about wiring it to the adc on the bbg, it's got too
> much voltage 0-5...
>
> Regards,
>
> --
> Robert Nelson
> https://rcn-ee.com/
>

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Re: [beagleboard] Grove temperature sensor on Beaglebone Black

[Jason Kridner]

> On Sep 14, 2016, at 5:24 PM, Robert Nelson  wrote:
> 
> 
> 
>> On Wed, Sep 14, 2016 at 3:41 PM, Siddharth Amaravadi 
>>  wrote:
>> Thank you for the response, but the pins are named as SIG and NC on the 
>> board. These are the pins that I connected to the P9_19 and P9_20 
>> respectively
>>> SIG -> P9_19
>>> NC  -> P9_20
>> 
>> The sensor related information can be found at 
>> http://wiki.seeedstudio.com/wiki/Grove_-_Temperature_Sensor_V1.2 
> 
> That senor out put's analog data... It's not i2c, spi, or usart...
> 
> and don't even think about wiring it to the adc on the bbg, it's got too much 
> voltage 0-5...

Unless you use a voltage divider. 

> 
> Regards,
> 
> -- 
> Robert Nelson
> https://rcn-ee.com/
> -- 
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Re: [beagleboard] Grove temperature sensor on Beaglebone Black

[Siddharth Amaravadi]

Can I use the setup mentioned in this link
https://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/adc
to connecct the temperature sensor to ADC of my BBB?

Is there any other setup that you'd suggest?

Thanks
Siddharth

On Thu, Sep 15, 2016 at 4:33 AM, Jason Kridner  wrote:

>
>
> On Sep 14, 2016, at 5:24 PM, Robert Nelson 
> wrote:
>
>
>
> On Wed, Sep 14, 2016 at 3:41 PM, Siddharth Amaravadi <
> siddharth.amarav...@gmail.com> wrote:
>
>>
>> 
>> Thank you for the response, but the pins are named as SIG and NC on the
>> board. These are the pins that I connected to the P9_19 and P9_20
>> respectively
>>
>> SIG -> P9_19
>> NC  -> P9_20
>>
>> The sensor related information can be found at
>> http://wiki.seeedstudio.com/wiki/Grove_-_Temperature_Sensor_V1.2
>>
>
> That senor out put's analog data... It's not i2c, spi, or usart...
>
> and don't even think about wiring it to the adc on the bbg, it's got too
> much voltage 0-5...
>
>
> Unless you use a voltage divider.
>
>
> Regards,
>
> --
> Robert Nelson
> https://rcn-ee.com/
>
> --
> For more options, visit http://beagleboard.org/discuss
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> 
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Re: [beagleboard] Grove temperature sensor on Beaglebone Black

[Robert Nelson]

On Wed, Sep 14, 2016 at 5:50 PM, Siddharth Amaravadi
 wrote:
> Oh I was totally misled by it. So, do you advise me to connect the SIG and
> NC pins to the analog pins?
>
> If yes can you provide me some guide as in how to go with that.

You'll need a voltage divider..

As the adc on the bone can only handle 1.8V

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

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Re: [beagleboard] Grove temperature sensor on Beaglebone Black

[Robert Nelson]

> Yeah i saw that picture too, that's so mis-leading..
>
> That "pin" on that board, must have an adc-pinmux option.. or it's the wrong
> stock picture..

in all my demo's i usually use this temperature sensor:

https://www.seeedstudio.com/Grove---Temperature%26Humidity-Sensor-%28High-Accuracy-%26-Mini%29-p-1921.html

Then it's just:

echo si7005 0x40 > /sys/bus/i2c/devices/i2c-1/new_device

Regards,

-- 
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https://rcn-ee.com/

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Re: [beagleboard] Grove temperature sensor on Beaglebone Black

[Robert Nelson]

On Wed, Sep 14, 2016 at 4:34 PM, Siddharth Amaravadi <
siddharth.amarav...@gmail.com> wrote:

> Robert, thank you once again, just a small correction I'm using a
> Beaglebone Black. When I tried referring to the officialpage of seeed
> studio I found this
> http://wiki.seeedstudio.com/images/thumb/8/8e/Grove_
> Temperature_Sensor_Hw_connect.jpg/600px-Grove_Temperature_
> Sensor_Hw_connect.jpg
>
> So i connected the Temperature Sensor to the I2C bus.
>
> Please correct me if I'm wrong and let me know any other inputs which can
> solve my problem.
>

Yeah i saw that picture too, that's so mis-leading..

That "pin" on that board, must have an adc-pinmux option.. or it's the
wrong stock picture..

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

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Re: [beagleboard] Grove temperature sensor on Beaglebone Black

[Robert Nelson]

On Wed, Sep 14, 2016 at 3:41 PM, Siddharth Amaravadi <
siddharth.amarav...@gmail.com> wrote:

>
> 
> Thank you for the response, but the pins are named as SIG and NC on the
> board. These are the pins that I connected to the P9_19 and P9_20
> respectively
>
> SIG -> P9_19
> NC  -> P9_20
>
> The sensor related information can be found at
> http://wiki.seeedstudio.com/wiki/Grove_-_Temperature_Sensor_V1.2
>

That senor out put's analog data... It's not i2c, spi, or usart...

and don't even think about wiring it to the adc on the bbg, it's got too
much voltage 0-5...

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

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Re: [beagleboard] Grove temperature sensor on Beaglebone Black

[Siddharth Amaravadi]

Thank you for the response, but the pins are named as SIG and NC on the 
board. These are the pins that I connected to the P9_19 and P9_20 
respectively

SIG -> P9_19
NC  -> P9_20

The sensor related information can be found at 
http://wiki.seeedstudio.com/wiki/Grove_-_Temperature_Sensor_V1.2 

On Wednesday, September 14, 2016 at 5:55:36 PM UTC+5:30, Jason Kridner 
wrote:
>
>
>
> On Sep 14, 2016, at 12:22 AM, Siddharth Amaravadi  > wrote:
>
> Hello,
>
> I've connected a Grove temperature sensor to my BBB. When I try to detect 
> it using i2cdetect, I don't see my sensor connected. Can you please help, 
> following are some details
>
> I2C Connection Details:
> SIG -> P9_19
> NC  -> P9_20
>
>
> P9_19 should be connected to SCL and P9_20 should be connected to SDA. 
>
>
> root@beaglebone:/# uname -a
> Linux beaglebone 3.8.13-bone47 #1 SMP Fri Apr 11 01:36:09 UTC 2014 armv7l 
> GNU/Li nux
> root@beaglebone:/# clear
> root@beaglebone:/# i2cdetect -l
> i2c-0   i2c OMAP I2C adapterI2C adapter
> i2c-1   i2c OMAP I2C adapterI2C adapter
> root@beaglebone:/# i2cdetect -r 0
> WARNING! This program can confuse your I2C bus, cause data loss and worse!
> I will probe file /dev/i2c-0 using read byte commands.
> I will probe address range 0x03-0x77.
> Continue? [Y/n] y
>  0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
> 00:  -- -- -- -- -- -- -- -- -- -- -- -- --
> 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 20: -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- --
> 30: -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- --
> 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 50: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 70: UU -- -- -- -- -- -- --
> root@beaglebone:/# i2cdetect -r 1
> WARNING! This program can confuse your I2C bus, cause data loss and worse!
> I will probe file /dev/i2c-1 using read byte commands.
> I will probe address range 0x03-0x77.
> Continue? [Y/n] y
>  0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
> 00:  -- -- -- -- -- -- -- -- -- -- -- -- --
> 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 50: -- -- -- -- UU UU UU UU -- -- -- -- -- -- -- --
> 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 70: -- -- -- -- -- -- -- --
>
> Please let me know if you need any further details
>
> -- 
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Re: [beagleboard] Grove temperature sensor on Beaglebone Black

[Jason Kridner]

> On Sep 14, 2016, at 12:22 AM, Siddharth Amaravadi 
>  wrote:
> 
> Hello,
> 
> I've connected a Grove temperature sensor to my BBB. When I try to detect it 
> using i2cdetect, I don't see my sensor connected. Can you please help, 
> following are some details
> 
> I2C Connection Details:
> SIG -> P9_19
> NC  -> P9_20

P9_19 should be connected to SCL and P9_20 should be connected to SDA. 

> 
> root@beaglebone:/# uname -a
> Linux beaglebone 3.8.13-bone47 #1 SMP Fri Apr 11 01:36:09 UTC 2014 armv7l 
> GNU/Li nux
> root@beaglebone:/# clear
> root@beaglebone:/# i2cdetect -l
> i2c-0   i2c OMAP I2C adapterI2C adapter
> i2c-1   i2c OMAP I2C adapterI2C adapter
> root@beaglebone:/# i2cdetect -r 0
> WARNING! This program can confuse your I2C bus, cause data loss and worse!
> I will probe file /dev/i2c-0 using read byte commands.
> I will probe address range 0x03-0x77.
> Continue? [Y/n] y
>  0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
> 00:  -- -- -- -- -- -- -- -- -- -- -- -- --
> 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 20: -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- --
> 30: -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- --
> 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 50: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 70: UU -- -- -- -- -- -- --
> root@beaglebone:/# i2cdetect -r 1
> WARNING! This program can confuse your I2C bus, cause data loss and worse!
> I will probe file /dev/i2c-1 using read byte commands.
> I will probe address range 0x03-0x77.
> Continue? [Y/n] y
>  0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
> 00:  -- -- -- -- -- -- -- -- -- -- -- -- --
> 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 50: -- -- -- -- UU UU UU UU -- -- -- -- -- -- -- --
> 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 70: -- -- -- -- -- -- -- --
> 
> Please let me know if you need any further details
> -- 
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[beagleboard] Grove temperature sensor on Beaglebone Black

[Siddharth Amaravadi]

Hello,

I've connected a Grove temperature sensor to my BBB. When I try to detect 
it using i2cdetect, I don't see my sensor connected. Can you please help, 
following are some details

I2C Connection Details:
SIG -> P9_19
NC  -> P9_20

root@beaglebone:/# uname -a
Linux beaglebone 3.8.13-bone47 #1 SMP Fri Apr 11 01:36:09 UTC 2014 armv7l 
GNU/Li nux
root@beaglebone:/# clear
root@beaglebone:/# i2cdetect -l
i2c-0   i2c OMAP I2C adapterI2C adapter
i2c-1   i2c OMAP I2C adapterI2C adapter
root@beaglebone:/# i2cdetect -r 0
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-0 using read byte commands.
I will probe address range 0x03-0x77.
Continue? [Y/n] y
 0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:  -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: UU -- -- -- -- -- -- --
root@beaglebone:/# i2cdetect -r 1
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-1 using read byte commands.
I will probe address range 0x03-0x77.
Continue? [Y/n] y
 0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:  -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- UU UU UU UU -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

Please let me know if you need any further details

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[beagleboard] Grove Temperature Sensor on Beaglebone Black

[siddharth . amaravadi]

Hello,

I'm trying to connect a Grove Temperature sensor 
(http://wiki.seeedstudio.com/wiki/Grove_-_Temperature_Sensor_V1.2#Connecting_hardware)
 
to my BBB. and when I try to detect the sensor I'm not able to find it. Can 
someone please help me out

root@beaglebone:/# uname -a
Linux beaglebone 3.8.13-bone47 #1 SMP Fri Apr 11 01:36:09 UTC 2014 armv7l 
GNU/Li 
nux
root@beaglebone:/# i2cdetect -l
i2c-0   i2c OMAP I2C adapterI2C adapter
i2c-1   i2c OMAP I2C adapterI2C adapter
root@beaglebone:/# i2cdetect -r 0
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-0 using read byte commands.
I will probe address range 0x03-0x77.
Continue? [Y/n] y
 0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:  -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: UU -- -- -- -- -- -- --
root@beaglebone:/# i2cdetect -r 1
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-1 using read byte commands.
I will probe address range 0x03-0x77.
Continue? [Y/n] y
 0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:  -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- UU UU UU UU -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

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