Hi RogueM,
I powered mmy Pi from a Power Bank. Now I have powered it directly from an adapter, and now it seems to be working:
root@raspberrypi:~# i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- 28 -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- 48 -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
And via Python3:
root@raspberrypi:~# python3
Python 3.4.2 (default, Oct 19 2014, 13:31:11)
[GCC 4.9.1] on linux
Type "help", "copyright", "credits" or "license" for more information.
import explorerhat
Explorer HAT Pro detected...
explorerhat.input
two, three, one, four
explorerhat.output
two, three, one, four
explorerhat.touch
four, one, five, six, two, three, eight, seven
explorerhat.light
green, red, yellow, blue
Seems to beworking now.
Anyway, thank you for your help!