@jessemonroy650
thank you!
however the bridge.begin() still not works, the sketch run to the bridge.begin(), then hang on, ive already try many ways, but not work:
1, upgrade to the latest lininoIO
2, remove python-firmata and pyserial
3, change bridge.begin() to bridge.begin(250000)
4, create stop-mcu in /etc/rc.d or /etc/init.d
almost give up, find arduino yun has so many problems