Chengdu Ebyte Electronic Technology Co., Ltd
E103-W05 User Manual
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Chengdu Ebyte Electronic Technology Co.,Ltd.
20
4.4 AT Command
Due to different parameters, the AT command of E103-W05 is not fully compatible with E103-W01 in some uses. For the detailed AT
command set, please refer to the document "
E103-W05 AT Command Set User Guide
".
5. Hardware Notice
I
t is recommended to use a DC stabilized power supply to supply power to the module. The power supply ripple
factor 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, and the whole machine is conducive to long-term stable operation;
The module should be as far away as possible from the parts with large electromagnetic interference such as power
supply, transformer, high-frequency wiring;
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 routed at 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;
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 permits, appropriate 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;
If the communication line uses 5V level, 1k-5.1k resistance must be connected in series (not recommended, there is
still a risk of damage);
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.
The antenna must not be installed inside the metal shell, which will greatly weaken the transmission distance.
