Chapter 10 Hardware Design - Ebyte E22-230T30D User Manual

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terminal R sets the module address, convert the hexadecimal value 0X020A to decimal value 522 and fill in
as relay terminal R the module address;
That is, the module address value that needs to be filled in by the relay terminal R at this time is 522.

Chapter 10 Hardware Design


t is recommended to use a DC regulated power supply to supply power to the module, the power supply ripple
coefficient should be as small as possible, and the module should be grounded reliably;

Please pay attention to the correct connection of the positive and negative poles of the power supply. If
the reverse connection will directly cause permanent damage to the module, it is recommended to design and
add an anti-reverse connection circuit.
 Please check the power supply to ensure that it is between the recommended power supply voltages. If it exceeds
the maximum value, the module will be permanently damaged;
 Please check the stability of the power supply, the voltage should not fluctuate greatly 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 can work stably for a long time;

The module should be kept 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 avoid the underside of
the module. If it is necessary to pass under the module, assuming that the module is soldered on the Top
Layer, ground copper (all copper) is placed on the Top Layer of the contact part of the module. And well
grounded), it must be close to the digital part of the module and routed on the Bottom Layer;

Assuming that the module is soldered or placed on the Top Layer, it is also wrong to arbitrarily route wires
on the Bottom Layer or other layers, which will affect the stray and receiving sensitivity of the module
to varying degrees；

Assuming that there are devices with large electromagnetic interference around the module, it 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 allows, appropriate isolation and shielding can be done.；
 Assuming that there are traces with large electromagnetic interference around the module (high-frequency
digital, high-frequency analog, power traces), the performance of the module will also be greatly affected.
It is recommended to stay away from the module according to the intensity of the interference. Proper isolation
and shielding;

If the communication line uses a 5V level, a 1k-5.1k resistor must be connected in series (not recommended,
there is still a risk of damage);

The antenna installation structure has a great influence on the performance of the module, and it is necessary
to ensure that the antenna is exposed and preferably vertically upward;

When the module is installed inside the case, a high-quality antenna extension cable can be used to extend
the antenna to the outside of the case；
The antenna must not be installed inside the metal shell, which will greatly reduce the transmission distance.
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E22-230T30D User Manual