Waveshare UART TO ETH - Page 10

RS485 TO ETH ( B)
Figure 4 UART TO ETH (B)
UART TO ETH (B) Pinout
Pin
Model
Description
5V
Power
5V Power Input
3.3V
Power
3.3V Power Input
GND
Ground
Ground
RST
Reset
Reset pin, low active. It is recommended to use
max811reus or a similar reset chip. Noise can be
filtered by a 0.1u capacitor. Low-level minimum time
100ns.
TXD
OUT
Serial data transmitting pin of the module, 3.3V TTL
level, can be connected to RXD of user MCU.
RXD
IN
Serial data receiving pin of the module, 3.3V TTL level,
can be connected to the user MCU's TXD.
DEF
IN
When the parameter is reset to 0 and held for more