Ebyte E104-BT12LSP, User Manual

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Chengdu Ebyte Electronic Technology Co.,Ltd.
E104-BT12LSP User Manual
Copyright ©2012–2021
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Chengdu Ebyte Electronic Technology Co.,Ltd.
7
formation.
14 NC - -
15 PWM3 PWM Output Blue light corresponding to SIGMESH HSL model
16 NC - -
17 TXD Output UART launch boot. Receive user's string of users.
18 RXD Input UART receive boot, send to user string
19 VCC -
Power supply, range 1.9~3.6V (Proposed to increase external ceramic
filter capacitance)
20 GND - Ground wire, connect to the power reference ground.
21 NC - -
22 NC - -
23 NC - -
24 NC - -
25 RST Input The chip reset triggers the input foot. It's working at low levels.
26 GND - Ground wire, connect to the power reference ground.
3. Basic Operation
3.1 Hardware design

It is recommended to use DC steady voltage power supply to supply power to this module, the ripple coefficient of
power supply is as small as possible, the module needs reliable grounding;
 Note the proper connection of the power supply positive and negative poles. Reconnecting may result in permanent
damage to the module.

Check the power supply to ensure that permanent damage to the module occurs between recommended supply
voltages, if exceeded;

Please check the stability of the power supply. The voltage cannot fluctuate significantly and frequently.

Please check the stability of the power supply. The voltage cannot fluctuate significantly and frequently.

When designing power supply circuits for modules, it is often recommended to keep more than 30 percent of the
spare, which is advantageous for the whole machine to work steadily over a long period of time.

Modules should be kept as far away as possible from large parts of electromagnetic interference such as power
supply, transformers, high frequency walkers, etc.

High frequency digital, high frequency analogue and power lines must be avoided under the module. If we have to
go under the module, suppose that the module is welded to Top Layer and copper laid on the contact part of the
module (all copper laid and well grounded), we must go near the module digital part and follow the wire on Botom
Layer.

Assuming that modules are welded or placed in Top Layers, random paths in Botom Layers or other layers are also
wrong, affecting the stray and reception sensitivity of modules to varying degrees;

Assuming that there is a large amount of electromagnetic interference around the module, the performance of the