Specifications

5. When designing the power supply circuit for the module, it is often recommended to reserve
more than 30% of the margin, as the whole machine is conducive to long-term stable work;
6. The module should be far away from the parts with large electromagnetic interference such as
power supply, transformer, high-frequency wiring;
7. High-frequency digital routing, high-frequency analog routing, and power routing must be
avoided under the module. If it is 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's contact
part (all copper and Good grounding), must be close to the digital part of the module and routed
in the Bottom Layer;
8. Assuming that the module is soldered or placed on the Top Layer, it is also wrong to
arbitrarily route the Bottom Layer or other layers, which will affect the spurs and receiving
sensitivity of the module to varying degrees;
9. It is assumed that there are devices with large electromagnetic interference around the
module, which will greatly affect the performance of the module. According to the strength of
the interference, it is recommended to stay away from the module appropriately. If the situation
allows, you can do proper isolation and shielding;
10. It is assumed that there are large electromagnetic interference traces around the module
(high-frequency digital, high-frequency analog, and power supply traces), which will greatly
affect the performance of the module. It is recommended to stay away from the module
according to the strength of the interference. Isolation and shielding;
11. If the communication line uses 5V level, a 1k-5.1k resistor must be connected in series
(not recommended, there is still a risk of damage);
12. Try to stay away from some physical layer which is also 2.4GHz TTL protocol, such as:
USB3.0;
13. The installation structure of the module has a large impact on the performance of the
module, it is best to go vertically. When the module is installed inside the case, try to choose
a material that has less attenuation to the signal number, such as ABS, etc., and the antenna
can be exposed directly when the receiving sensitivity is high;
14. The module cannot be installed inside the metal case, which will greatly reduce the
transmission distance.
4.4 Protocol
Important statement: This module is only for internal use, and the specific protocol of
communication is not described in detail;
. Support "Disconnect Bluetooth", "Bluetooth Reconnect" commands;
. Support "power-down sleep", "stop sending broadcast code" commands;
. Support "Bluetooth Name Rename", "Reset Bluetooth Mode" commands;
. Support "Bluetooth function switching", "2.4G transparent transmission switching" commands;
. Support "HID data transmission" transmission command;
. Support "2.4G transparent data transmission" command;