Questions regarding SparkFun Digital Temperature Sensor Breakout - TMP102 and ESP8266

Hello We are using SparkFun Digital Temperature Sensor Breakout - TMP102 and ESP8266
The connections are listed below

TMP102 ==> ESP8266
GND ===> GND
1.4-3.6V ===>3V3
SDA===> D2
SCL===>D1

Where does ALT and ADD0 pn TMP102 goes on ESP8266

it's meant to be connected to an ALERT_PIN, so you can use any pin and check its status.

have you read the tutorial https://learn.sparkfun.com/tutorials/tmp102-digital-temperature-sensor-hookup-guide/all?

they also say there

The only pin that we aren't using is ADD0, this pin is used to change the address of the TMP102. If you're using multiple TMP102s or another device that uses that address, you'll want to use this pin to change the address. The default address is 0x48. You can change the address by cutting the ADD0 jumper on the back of the board and connecting an external jumper wire to the following pins:

  • VCC → 0x49
  • SDA → 0x4A
  • SCL → 0x4B

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