Alternative firmware for W1209, W1219, W3230, M2EF, operating as Thermostat or Timer - rtek1000/W1209-firmware-modified ...

Significantly optimized for 16MHz AVR Arduino boards (2.5-5x faster than other libraries). Achieved 6.9Mbps SPI transfer rate (at DIV2/16MHz clock) In compatiliblity mode it could work with other MCUs ...