Chengdu Ebyte Electronic Technology Co.,Ltd.
Copyright ©2012–2020
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
7
4.0 Hardware and Software Notice
4.1 Hardware Notice
It is recommended to use a DC stabilized power supply to supply power to the module. The power supply ripple coefficient is as
small as possible, and the module needs to be reliably grounded
Please pay attention to the correct connection of the positive and negative poles of the power supply, such as reverse connection
may cause permanent damage to the module;
Please check the power supply to ensure that it is between the recommended power supply voltage, if exceeding the maximum
value will cause permanent damage to the module;
Please check the power supply stability, the voltage cannot fluctuate significantly and frequently;
When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the margin, so
that the whole machine is conducive to long-term stable work;
The module should be as far away as possible from the power supply, transformer, high-frequency wiring and other parts with
large electromagnetic interference;
High-frequency digital traces, high-frequency analog traces, and power traces must be avoided under the module. If it is
absolutely necessary to pass under the module, it is assumed that the module is soldered to the Top Layer, and copper is laid on
the Top Layer of the module contact part (all copper And well grounded), must be close to the digital part of the module and the
wiring is on the Bottom Layer;
Assuming that the module is soldered or placed on the Top Layer, it is also wrong to randomly route on the Bottom Layer or
other layers, which will affect the module's spurs and receiving sensitivity to varying degrees;
It is assumed that there are devices with large electromagnetic interference around the module that will greatly affect the
performance of the module. It is recommended to stay away from the module according to the intensity of the interference. If the
situation permits, proper isolation and shielding can be done;
It is assumed that there are traces with high electromagnetic interference around the module (high-frequency digital,
high-frequency analog, and power traces), which will greatly affect the performance of the module. It is recommended to stay
away from the module according to the intensity of the interference. Isolation and shielding;
Try to stay away from the TTL protocol which is also 2.4GHz in some physical layers, for example: USB3.0;
The antenna installation structure has a great impact on the performance of the module. Make sure that the antenna is exposed,
preferably vertically. When the module is installed inside the chassis, you can use high-quality antenna extension cords to extend
the antenna to the outside of the chassis;
The antenna must not be installed inside the metal shell, which will greatly weaken the transmission distance.
4.2 Software Notice
The chip of this module is CMT2300A, and its driving mode is SPI, and users can operate according to the
Datasheet
.
GPIO1/GPIO2/GPIO3 are general-purpose I/O ports, see
for details.
