Chengdu Ebyte Electronic Technology Co.,Ltd.
User Manual
Copyright ©2012–2020
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
54
power of the 8KM version is usually 1W (30dBm). The transmit power of 8KM is 10 times that of 4KM.
If you need more stable communication, it is recommended that you directly choose the 8KM version.
We have measured the communication distance, and the visible distance is our standard distance. However, practical
applications often have certain occlusions, such as several walls, or several high-rise buildings in the middle.
We recommend that customers actually test the communication distance. We also have the following suggestions to
improve the stability of LoRa wireless communication.
The antenna is placed by the window, or even outside the window;
Adjust the orientation of the antenna, the antenna generally sends signals to both sides of the antenna;
Appropriately reduce the air rate of transmission;
For more details, please refer to the chapter "Second Communication Method: LoRa Spread Spectrum".
8.2.3 How should the antenna be placed
The placement of the antenna greatly affects the transmission stability of the module.
The antenna transmits data to both sides of the antenna and to the upper and middle positions of the antenna.
Therefore, pay attention to the placement direction of the antenna pole, which should be parallel to the data
receiving and transmitting ends.
The antenna should be placed in a slightly open location, as close to a window as possible. Do not place directly
against a wall or metal.
In the application scenario of the industrial control box, the antenna must be outside the industrial control box, and
the signal of the antenna in the industrial control box will basically be blocked.
Put the antenna as high as possible.
8.3 Questions related to digital input and output
8.3.1 AI/AO input/no input/output, DI/DO input/no input/output
Check the wiring, the user needs to distinguish clearly which of the two-wire, three-wire, and four-wire system the
sensor is.
The two modules did not communicate successfully. Check whether the networking is successful.
The green 5.08 terminal screw is not tightened, resulting in poor contact of the analog input.
The green 5.08 terminal is not plugged tightly, resulting in poor contact.
8.2.4 The communication between the two modules is unstable
Check the LoRa communication parameters (channel, airspeed, address) of the two modules, which need to be
configured and managed to avoid the same frequency band and the same type of products in the environment,
resulting in signal confusion and instability.
If the antenna distance between the paired products is too far, or there are too many factors for the attenuation of the
wireless radio frequency in the middle, the user can judge by indenting the distance between the products. If the
reason is the distance, you can change the antenna position of the product to a better place, or replace the antenna
with better performance.
