Meet Teensy LC (low cost)
Meet the new Teensy LC, a more affordable version of popular Teensy ARM development board and is now available for pre-order for only $$11.65. It features an ARM Cortex-M0+ processor at 48 MHz, 62K Flash, 8K RAM, 12 bit analog input & output, hardware Serial, SPI & I2C, USB, and a total of 27 I/O pins. And most importantly, Teensy-LC maintains the same form-factor as Teensy 3.1, with most pins offering similar peripheral features.
Teensy LC pinouts
Most modern projects involve serial communication with sensors, other chips, other systems, or even the internet. Hardware serial ports greatly simplify projects and enable excellent performance.
Teensy-LC provide plenty of serial connectivity: 2 SPI ports, 2 I2C, and 3 Serial ports. All 3 serial ports are supported by high quality drivers in Teensyduino, with both transmit and receive buffering, and even support for RS485 transmitter enable.
Teensy-LC will be ideal for inexpensive “Internet Of Things” projects when paired with a ESP8266 Wifi module, which requires a fast hardware serial or SPI port.