Hello,
I understand the ADXL345 accelerometer is capable of transmitting at both 0x53 and 0x1D with a change to the SDO/ALT ADDRESS grounding so that I can have two of the same module connected to I2C. As the Seeed module transmits at 0x53 then this pin must be connected to ground, but I’m wondering if it is possible to modify the module so that pin is set to high, thus providing an address of 0x1D.
If this modification is not possible I have been looking into the I2C multiplexer hub (TCA9548A), but I understand there are shortages of this chip and the Grove one is not easily/quickly locatable.
Further information on changing the address at: 2 ADXL345 accelerometers simultaneously connected in I2C mode - Robotics - Arduino Forum.