Chengdu Ebyte Electronic Technology Co.,Ltd
E104-BT53C3 Manual User
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，Chengdu Ebyte Electronic Technology Co.,Ltd
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assistant will print the firmware loading information, the module will be restarted, and the firmware update is
completed.
Chapter 9 Hardware design
It is recommended that the DC voltage regulated power supply be used to power the module. The ripple coefficient of
the power supply is as small as possible, and the module must be grounded reliably
；
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 it exceeds the
maximum value, the module may be permanently damaged
；
Check the stability of the power supply and ensure that the voltage does not fluctuate greatly and frequently
；
In the design of the power supply circuit for the module, it is often recommended to retain more than 30% of the
margin, and the whole machine is conducive to long-term stable work
；
The module should be far away from the parts with high 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 must pass under the module, assume that the module is welded to the Top Layer. Lay copper (all
copper and well grounded) on the Top Layer of the contact part of the module 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 the interference, it is recommended to stay away from the
module. If the situation permits, appropriate isolation and shielding can be done
；
Assuming that there is a large electromagnetic interference around the module (high frequency digital, high frequency
