Chengdu Ebyte Electronic Technology Co., Ltd
E01C-ML01D User Manual
5
4.Basic operation
4.1 Hardware design
It is recommended to use a DC stabilized power supply. 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. Reverse connection
may cause permanent damage to the module
；
Please check the power supply to ensure it is within the recommended voltage otherwise when it exceeds the maximum
value the module will be permanently damaged;
Please check the stability of the power supply, the voltage can not be fluctuated frequently
；
When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the margin,
so the whole machine is beneficial for long-term stable operation;
The module should be as far away as possible from the power supply, transformers, high-frequency wiring and other parts
with large electromagnetic interference;
High-frequency digital routing, high-frequency analog routing, and power routing must be avoided under the module. If it
is necessary to pass through the module, assume that the module is soldered to the Top Layer, and the copper is spread on
the Top Layer of the module contact part(well grounded), it must be close to the digital part of the module and routed in
the Bottom Layer
；
Assuming the module is soldered or placed over the Top Layer, it is wrong to randomly route over the Bottom Layer or
other layers, which will affect the module's spurs and receiving sensitivity to varying degrees
；
It is assumed that there are devices with large electromagnetic interference around the module that will greatly affect the
performance. It is recommended to keep them away from the module according to the strength of the interference. If
necessary, appropriate isolation and shielding can be done
；
Assume that there are traces with large electromagnetic interference (high-frequency digital, high-frequency analog, power
traces) around the module that will greatly affect the performance of the module. It is recommended to stay away from the
module according to the strength of the interference. If necessary, appropriate isolation and shielding can be done.
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)
；
Try to stay away from some physical layers such as TTL protocol at 2.4GHz , for example: USB3.0
；
The mounting structure of antenna has a great influence on the performance of the module. It is necessary to ensure that
the antenna is exposed, preferably vertically upward. When the module is mounted inside the case, use a good antenna
extension cable to extend the antenna to the outside
；
The antenna must not be installed inside the metal case, which will cause the transmission distance to be greatly weakened.
Conductors or other sources of interference should be avoided around the onboard PCB antenna.
4.2 Software editing
Insert the module into the user circuit board, use the microcontroller to communicate with the module by SPI or serial port,
and operate the control register and the transceiver buffer through the SPI command to complete the wireless data transmit
and receive function.
As interrupt pin for IRQ, it can be used to wake-up MCU and achieve fast response; But the user can get the interrupt
status through SPI (not recommended, it is not conducive to the overall power consumption, and with low efficiency
）；
CE pin can be high level for long-term, but it needs to set as POWER DOWN mode when the module writes registers, and
it is recommended that CE is controlled by MCU pin
；
