add i2c_client and serial_bridge functions
import SSD1306 OLED driver from onelife's blog
adjust ssd1306/oled driver for boxie/ha
adjust for boxie health assistant
port driver for jlx12864g-1016
add ad8232/vbat adc driver
add sim900 driver
add vs10xx driver
refined README.md
add lp modes functions
support upgrade firmware from DFS to internal Flash
update STM32F4xx_Libraries to v1.1.0 to get stm32f427x support
update to STM32F4xx_Libraries STM32F429I-Discovery_FW_V1.0.0
for new 427 based board