Hello Jonathan
Thanks for the program. I tried it, but it does not work. He writes the same number 4294967295. If I put the number on the buffer [0] … [3], he writes the number 255 (FF). Therefore, it can not read UP Time from Tis.
my Adafruit Feather HUZZAH with ESP8266, product 2821 works on logic 3.3V. I also downloaded 10kohm or 20kohm pull-up resistor to SDA, SCL.
I have two Tics T825 and T834 and the same way.
here are more information. To your email send my setting to Tic.
I do not understand 
