How change add QMP6988 from 0x70 to 0x56?

Nicholas Parasporo

Hi all guys.

I will explain my problem right away. Through arduino I am trying to connect several sensors including the ENV3 to the PaHUB. But with the ENV3 I am experiencing a communication problem this is because QMP6988 and PaHUB communicate on the same address and this does not allow my M5Stickc Plus to receive the pressure value. Is there any way to change the communication address of the QMP6988?
Thank you in advance,
Sincerely
Nicholas.

gunnm

Hello
Have you or anyone else found a solution? Would be glad to have it. Thanks.
Greetings

felmue

Hello guys

According to the datasheet in I2C mode pin 5 selects the address. According to the schematic by default it is connected to GND (=0x70) and in order to change the address to 0x56 you would need to connect it to VDDIO (aka 3.3 V).

I don't have an ENV III so I don't know if pin 5 is accessible or not.

Thanks
Felix

gunnm

@felmue said in How change add QMP6988 from 0x70 to 0x56?:

Hello guys
According to the datasheet in I2C mode pin 5 selects the address. According to the schematic by default it is connected to GND (=0x70) and in order to change the address to 0x56 you would need to connect it to VDDIO (aka 3.3 V).
I don't have an ENV III so I don't know if pin 5 is accessible or not.
Thanks
Felix

Hello Felix

Thanks for the answer. Do I understand correctly that it can only be changed via hardware? So not via a software like Arduino IDE?

Greetings

felmue

Hello @gunnm

yes, that is my understanding from reading the datasheet. The I2C address can only be changed via hardware.

Thanks
Felix