TCA9548A I2C Multiplexer Module Error Soft WDT Reset Sensor Not Accurate I2C BMP280 ESP8266

Arduino connection i2C, can connect up to 8 device using multiplexter TCA9548A
I2C Multiplexer TCA9548A sometimes not working

3 weeks, I trying Multiplexe for ESP8266
But fail, after I am understand. Problem error TCA9548A Multiplexter not from hardware.
Problem from wire connection, and wrong program.

Arduino IDE 2.0 dont have tool option
EspExceptionDecoder may not work.

Some commons problem
Wrong voltage, device need 5V. but connect to 3.3V
Broken device, damage during install.
Wrong wiring, first big mistake
Wrong select channel between hardware and program.

--Void Setup, Arduino cant work, because loop in Setup step.
In Void Setup, make headache
Start problems in the Void Setup section
The biggest problem for first time users is chip multiplexter
Command error like below
-Soft WDT reset
-stack
-ctx: cont
-sp: 3ffffde0 end: 3fffffc0 offset: 01b0
-3fffff90: f

--Void Loop, everyting wire ok, device ok.
But device not working, wrong value, error display etc
Simple problem in Void Loop step, check channel number and program.

TCA9548A Pin Default 0x70 (no need connect anything)
The TCA9548A multiplexer is interesting in that it has an I2C address (0x70 by default) - and you basically send it a command to tell it which I2C multiplexed output you want to talk to, then you can address the board you want to address.

Wiring
Sometimes good wiring not really connect like we can see.
Sensor can detect via Multiplexter, look like can work.
But only show one number example temp only one value - 25 deg.C
Other sensor show between 30-31 degC dynamic value.
25 deg.C show on one sensor, may be not problem from hardware sensor
May be problem from wire power, and temperature sensor show not accurate.
No power, sensor detect only 1 number (ex 25 Deg.C only)
Just check power wire usually sensor back normal.

Step First, test hardware
Below Link Arduino program for test, check connection i2c and multiplexter TCA9548A
Any device connect to Multiplexter must detect during test program.
Before you start to make the program in Arduino IDE

Sample program with 3 sensor BMP280, and Multiplexter
If want learn, below link

[shohailkhan]

I have tried to run the scanner, but nothing is shown in serial monitor.. Wiring, Voltage all I have checked, I think nothing wrong there.. Please help me..

Can I discuss with you personally? Please..