TCA9548A not working to read I2C sensors connected to it

Qwiic System
1

I have a TCA9548A QWIIC version from SparkFun. I have 6 AHT20 temperature / humidity sensors and one BMP390 barometer sensor connected to the TCA9548A. All are running off of an Arduino UNO. I am using the code to control the TCA9548A that is found on the SparkFun page for that board to control the MUX. Everything compiles correctly, but when my code goes into the enableMuxPort() function, the code just stalls at this line

Wire.requestFrom(MUX_ADDR, 1);

#define MUX_ADDR 0x070 is in the code in the header section.

I know it stall there as I have debugged it by placing Serial.println() statements to see how far in the code it goes. The last print out is just before that above line, and the Serial.println() that comes after that line never prints.

What am I missing? Is there a library needed for that board? The product page and the tutorial do not mention any library.

Thanks for any help.

2

Looks to me the example is wrong . Look at viewtopic.php?f=97&t=58338&hilit=Requestfrom where this is answered earlier.