User Manual

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Product Dimension
Definition of Pins
HC-12 module can adopt patch welding, or weld 2.54mm-spacing pin header, and
directly insert it onto user’s PCB. The module totally has nine pins and one RF
antenna pedestal ANT1, and their definitions are as shown in the table below:
Pin Definition I/O direction Note
1 VCC Power supply input,
DC3.2V-5.5V, with
load capacity not
less than 200mA.
(Note: If the module
is working in
transmitting state for
a long time, it is
suggested that one
1N4007 diode
should be connected
in series when the
power voltage is
greater than 4.5V, to
avoid heating of
built-in LDO of
module.)
2 GND Common ground