I'm struggling with a problem, how to connect more sensors on top of this raspberry shield => https://sixfab.com/product/raspberry-pi-nb-iot-shield/

The shields schematic can be found here and it shows how the I2C pinout works => https://github.com/sixfab/RPI-NB-IoT-Shield/blob/master/hardware/rpi_nb-iot_sch.PDF

I have a Adafruit CCS811 sensor breakout board I would like to add on top of the shield. I tried to connect like shown in the pictures below, but the LED on the sensor breakout wont lit, and my i2cdetect does not show any added addresses. I'm wondering is my wiring correct and am I able to see the new added devices trough i2cdetect?

If I need to give the sensor 3.3v, where could I take it from, since the shield does not give any 3.3v pinout?

Sorry for possibly stupid question, my embedded is not very strong.

enter image description here

  • The most likely problem is incorrect wiring between the shield I2C header and the breadboard. I'd guess the LED should light once power is applied. Test by just supplying power and ground without using the shield.
    – joan
    Jul 10 '18 at 8:40
  • Tested with an Arduino Uno, got reading from sensors, but LED does not lit up.
    – Jack M.
    Jul 10 '18 at 9:35
  • Okay, so put it back in place and check SDA and SCL are correctly placed.
    – joan
    Jul 10 '18 at 10:23
  • Tested with Raspberry without the shield. Raspberry freezed and now only a red LED is showing when I power on. Can't connect through SSH.
    – Jack M.
    Jul 10 '18 at 10:46
  • That sounds like an incorrect connection and does not sound good.
    – joan
    Jul 10 '18 at 12:19

I just google out some solution but not sure, maybe this kind of I2C shield might be helpful but you have to do some amount of soldering so that it will be fixed easily or other than that, this I2C extension board can also be helpful.

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