Ebyte E51-470NW16S, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co., Ltd. E51-470NW16S USER Manual
Copyright ©2012–2023
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Chengdu Ebyte Electronic Technology Co., Ltd.
9
Chapter IV basic operations
4.1 Hardware Design
 It is recommended that the DC voltage regulated power supply be used for the module. The ripple coefficient
of the power supply is as small as possible, and the module must be grounded reliably.

Please pay attention to the correct connection of the positive and negative terminals of the power supply,
such as reverse connection may cause permanent damage to the module;

Check the power supply to ensure that the power supply voltage is within the recommended value. If the power
supply voltage exceeds the maximum value, the module will be permanently damaged.

Check the stability of the power supply and ensure that the voltage does not fluctuate greatly and frequently；

When designing the power supply circuit for the module, it is often recommended to keep more than 30% of
the margin, which is conducive to long-term stable operation of the whole machine;

The module should be far away from the parts with large electromagnetic interference, such as the power supply,
transformer, and high-frequency cable.

The high-frequency digital cables, high-frequency analog cables, and power cables must be routed away from
under the module. If you absolutely need to pass under the module, assume that the module is welded at the
Top Layer. Lay copper on the Top Layer of the contact part of the module (all of it is covered with copper
and well grounded) close to the digital part of the module and route the cables at the Bottom Layer.
 It is also wrong to assume that the module is welded or placed on the Top Layer, and random wiring in the
Bottom Layer or other layers will affect the module's spurious and receiving sensitivity to varying degrees；

Assuming that there are devices with large electromagnetic interference around the module, the performance
of the module will be greatly affected. According to the intensity of interference, it is recommended to
keep away from the module appropriately. If circumstances permit, appropriate isolation and shielding can
be done.

Assuming that there is strong electromagnetic interference (high frequency digital, high frequency analog,
power supply wiring) around the module, the performance of the module will be greatly affected. According
to the intensity of interference, it is recommended to keep away from the module appropriately. If
circumstances permit, appropriate isolation and shielding can be done.
 If the communication line uses 5V level, it must be connected in series with 1k-5.1k resistance (not recommended,
there is still risk of damage).

Try to stay away from TTL protocols with some physical layers of 2.4GHz, such as USB3.0;
 The antenna installation structure has a great impact on the module performance. It is necessary to ensure
that the antenna is exposed, preferably vertically upward. When the module is installed inside the housing,
the antenna can be extended to the outside of the housing using a high-quality antenna extension cable；

Do not install the antenna in the metal shell; the transmission distance will be greatly reduced.

If the module is connected to an MCU, it is recommended to add 200R protection resistance to the RXD/TXD
of the external MCU。