Analog Input And Output Related Issues - Ebyte K62-DL20 User Manual

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suggest customers to actually measure it on site.
2. LoRa communication, 4KM or 8KM module, actual communication distance?
LoRa communication, the communication power of 4KM version is usually 0.16W (22dBm); the communication power
of 8KM version is usually 1W (30dBm). 8KM transmitting power is 10 times more than 4KM transmitting power.
If you need more stable communication, we suggest you to choose the 8KM version directly.
Communication distance we have measured, the open visual distance is our nominal distance. But the actual application
often has a certain amount of obstruction, such as the interval of several walls, or the interval of several tall buildings,
etc..
We recommend customers to actually test the communication distance. We also have the following suggestions to
improve the stability of LoRa wireless communication.
Place the antenna against a window, or even outside a window.
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Adjusting the orientation of the antenna, which generally transmits signals to both sides of the antenna.
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Appropriately reducing the air rate of transmission.
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For more details, please refer to the section "Second communication method: LoRa spread spectrum".
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3. How the antenna should be placed?
The placement of the antenna has a great impact on the transmission stability of the module.
The antenna is sending data to both sides of the antenna and to the upper middle position. So, pay attention to the
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antenna mast placement direction, which should be parallel to the data receiving and sending end.
The antenna should be placed in a slightly open position, as close to the window as possible. Do not place it directly
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next to the wall or metal.
If the application scenario in the industrial control box, the antenna must be outside the industrial control box, the
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antenna placed inside the industrial control box signal will be basically blocked out.
Antenna as high as possible, signal transmission farther.
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8.3 Analog input and output related issues

1. No input/output value for AI/AO input, no input/output value for DI/DO input
The user needs to distinguish clearly which of the two-wire, three-wire, or four-wire system the sensor is, and the
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user confirms what type the sensor is, and then corresponds to the corresponding wiring method for wiring.
Two modules are not communicating successfully. Check whether the network is successful.
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The green 5.08 terminal screw is not tightened, resulting in poor analog input contact.
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Green 5.08 terminal block is not plugged in tightly resulting in poor contact.
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2. Unstable communication between the two modules.
Check the LoRa communication parameters of the two modules (channel, airspeed, address) need to be configured
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and managed to avoid the environment in the same frequency band and and the same type of products, resulting in
signal misalignment, and thus unstable.
The antenna distance between paired products is too far, or too many factors in between on the wireless RF
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attenuation, the user can see the product distance indented for judgment. If the distance is the reason, you can
replace the product antenna position for a better place, or replace the better performance of the antenna.
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K62-DL20 User Manual
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