Atmospheric Sensor Breakout - BME280 change address from 0x77 to 0x76

Sensors Environmental
1

The default I2C address is 0x77 but can be changed to 0x76 by cutting the ADR trace and solder the right side?

Will connecting SDO/ADR to GND accomplish the change of address to 0x76 as I really do not want to have to cut the trace and solder!

2

I don’t think so…the SDO/ADR would still be connected to the R4 side of SJ3; I’d advise just cutting the trace and putting a solder blob…it’s not too hard, check out a youtube video or two if you’d like an example

Our hookup guide has some limited info too https://learn.sparkfun.com/tutorials/sp … e-overview

3

Thanks. I realize it isn’t very difficult to cut the trace and solder the center/right side but it is a permanent fix or a bit of a pain at best to keep changing it.

I am familiar with the hookup guide.

I was really hoping to be able to easily switch between 0x77 and 0x76 as and when I needed to.

4

Grounding SDO/ADR will change the I2C address to 0x76. If you don’t do anything to the jumper this will result in a small current increase (Less than 1mA) but will still work. Disconnecting SDO/ADR will return the sensor to 0x77 because of the pullup resistor that’s connected to the jumper.

5

Aha - thanks - that is good news. That is exactly what I want to accomplish and not have to go cutting traces - and easily reversed. I will now go ahead and give that a try (I hadn’t previously as I was hoping for clarification).