Chengdu Ebyte Electronic Technology Co,;Ltd E32-433T20DC user manualCopyright ©2012–2019,Chengdu Ebyte Electronic Technology Co.,Ltd. 6outputs low level. Can be configured as push-pull output(suspending is allowed).6 VCC Input Power supply :2.3~ 5.2V DC7 GND Input Ground8 Fixed orifice - Fixed orifice9 Fixed orifice - Fixed orifice10 Fixed orifice - Fixed orifice4 Connect to MCUNo. Description(STM8L MCU)1 The UART module is TTL level.2 For some M CU works at 5VDC, it may need to add 4-10K pull-up resistor for the TXD & AUX pin.5 Function description5.1 Fixed transmission