Chengdu Ebyte Electronic Technology Co., Ltd. E19-433M30S User ManualCopyright ©2012–2018,Chengdu Ebyte Electronic Technology Co.,Ltd. 43.Size and pin definitionPinNo Pin item Pin direction Pin application1 GND - Ground electrode, connected to the power reference ground2 DIO5 Input/Output Configurable IO port(Please find more on SX1278 datasheet)3 DIO4 Input/Output Configurable IO port(Please find more on SX1278 datasheet)4 DIO3 Input/Output Configurable IO port(Please find more on SX1278 datasheet)5 DIO2 Input/Output Configurable IO port(Please find more on SX1278 datasheet)6 DIO1 Input/Output Configurable IO port(Please find more on SX1278 datasheet)7 DIO0 Input/Output Configurable IO port(Please find more on SX1278 datasheet)8 RST Input Reset9 GND - Ground electrode, connected to the power reference ground.10 GND - Ground electrode, connected to the power reference ground.11 VCC - Power supply: 4.75~5.5V (Ceramic filter capacitoris advised to add)12 SCK Input SPI clock13 M ISO Output SPI clock14 M OSI Input SPI clock