Data Sheet

6 ANTENNA INFORMATION
For the antenna area of the PCB of the module, refer to Diagram of Mechanical
Dimensions.
6.3 Treatment of GPIO Pins
A few pins (PA 12, PA 13, PA 15, PA 25, PA 28, and PA 26) of the module will have
instantaneous high-level pulses before the chip fully works, and everything will be
normal after the chip works. For these pins, if they are directly used as driving light
sources or relays, in order to avoid the effect of burrs at the moment of powering
on, refer to the following processing methods: Pull down a 1-K resistor at an output
port of a pin, and then connect a diode in series. At this time, the voltage of a GPIO
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