twowire i2c library don't work with multiple instance

[6leonardo]

Two wire for i2c not support multi instances...

If you create multiple instance of twowire only the last one work

Originally posted by @devyte in #3063 (comment)

[6leonardo]

The problem is that twowire use internally a static class twi..so you can create many instance of twowire but there is only one twi....

I do same changes and Now it works....it's not very beautiful code but seams to work...
I have tested with 4 gy-bme280... 2 for bus
here the patch in cores/esp8266 I
and in the library Wire
you can put the wire library in local library but for the core I must change the original files
mod_i2c_multi-bus.zip
I attach the code for test the 4 gy-bme280
gy-bme280.ino.zip

All it's started here
......

Originally posted by @6leonardo in #3063 (comment)