ADS 1115 Circut and configuration, i2cdetect -y 1 discovers nothing

[ghostinthepi]

i2cdetect -y 1 is not discovering my device that I constructed, see the photo below possibly the soldering is botched or the wiring is bad? I'm not an excellent solderer.

https://photos.app.goo.gl/HSxBxhYkrHwnSqtg7

https://photos.app.goo.gl/dWyV6N4fTK6767Bc6
this is a raspberrypi 3 and this circuit is from "getting started with raspberry pi" 2nd edition; I've sometimes had to change thing because most examples are written for the raspberrypi 2

[joan]

Could we have close-ups of the ADS1115 and the connections at the Pi. We need to be able to see how each pin is connected.

[neilgl]

Yes and have you enabled the I2C interface on the pi using sudo raspi-config?

[ghostinthepi]

Hi joan and neilgl,

https://photos.app.goo.gl/hSS8q3u3Dq7oqgpn6 - ADS1115 chip close up photo

https://photos.app.goo.gl/kYaKY8amAs3sK59r5 - to the PI wiring

https://photos.app.goo.gl/73ML1tSFZg2zQhBD7 - oblique of the device

https://photos.app.goo.gl/B8L1UHnXJvd7wxxh6 - angle of pentiometer

https://photos.app.goo.gl/cNW7sHEAsMfzTrKb9 - angle of chip wiring

Yes I have enabled the I2C interface on the pi using sudo raspi-config, for instance I see the

0 1 2 3 4 5
00: -- -- --
10: -- -- -- -- -- --

(etc) But there is no device connection/recognition by the pi.

Thank you

[neilgl]

The soldering of the pins into the ADS1115 board looks a little messy so there could be a short circuit between some pins. Can you test that with a multimeter, or reflow the solder, removing excess solder?

[pcmanbob]

looking at the soldering on the ADS board I would think there is a high possibility of a dry solder joint or 2 on there, as neilgl suggested I would redo the soldering , may be practising first on some strip board using some cheap resistors to improve your soldering technique.

You might also look at one of the many soldering videos on YouTube to see what your soldering joints should look like.

[DougieLawson]

The soldering of the pins into the ADS1115 board looks a little messy so there could be a short circuit between some pins. Can you test that with a multimeter, or reflow the solder, removing excess solder?

All of those solder joints look dry.
https://learn.adafruit.com/adafruit-gui ... n-problems

[ghostinthepi]

pcmanbob, DougieLawson, neilgl, joan

Thank you for your insights it is truly appreciated. I'm going to move forward with the help from your responses. After practicing some soldering I will return to the chip and try to salvage my first mistakes and follow up with a post, hopefully with a successful signal and hopefully by this weekend.