# AltSoftSerial Library

Improved software emulated serial, using hardware timers for precise signal
timing and availability of CPU time for other libraries to respond to interrupts
during data AltSoftSerial data transmission and reception.

http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html

![AltSoftSerial on Teensy 2.0](http://www.pjrc.com/teensy/td_libs_AltSoftSerial_2.jpg)

If you need very low baud rates, check out [SlowSoftSerial](https://forum.pjrc.com/threads/58604-SlowSoftSerial-library-for-slow-baud-rates?p=222991#post222991) by Paul Williamson.