The module features:

1, 2 channels of logic and high-voltage low-voltage two-way logic;

2, 2 channels of high-voltage logic in a low-voltage logic of one-way conversion;

3, small module, 1.5cm X 1.5cm

4, module compatible with breadboard, can be used directly on the breadboard;

Instructions: the high voltage of 5 V low voltage of 3.3 V for example)

HV connect 5v power

LV 3.3V power supply

GND connect power anode, both the power of the Commons

5v TTL RXI input, will be in 3.3v TTL RXO output

TXI input and output of 3.3V TTL, TXO input/output 5V TTL, TXI and TXO bi-directional transfers

You only have to solder the headers yourself