Lora-Related Issues - Ebyte K62-DL20 User Manual

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Baud rate has been changed and forgotten: Press and hold the "SFR" button to restore the factory settings, and then
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apply the configuration software again to read. You can also apply the search baud rate function to search.
If all the above are correct: search the device with the host computer or try to send data to the device with the serial
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assistant to see if the device's RXD light is flashing, if the device's RXD light is not flashing, you need to check
whether the USB to 485 is damaged.
Configuration software and the computer is really incompatible and can not be used: then you can use his serial
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software tools to read the device parameters by viewing the product ModBus command.
5. The two modules do not communicate successfully and the NET lamp does not light up.
Whether to connect the antenna (the distance between the two antennas should be greater than 1.5M) The antennas
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cannot be placed in a closed tin cabinet (preferably in an open area).
Check whether the configuration information of the communication module is consistent (channel, airspeed,
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address).
The 485 communication distance is too far, you need to put a resistor of less than 1K ohm on the AB side of the 485,
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preferably on both the transmitting and receiving side.
LoRa communication distance is too far or the surrounding environment has too many metal shades, consider
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replacing high-power products.
6. Communication between two devices is not successful, but the NET light is always on.
The sensor at the AI acquisition end is damaged or the sensor is wired incorrectly.
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1) Check the AI light of the acquisition module if it is always on, the input signal is detected, and vice versa.
2) Check whether there is any problem with the wiring of the sensor connected to the acquisition equipment. Please
verify the sensor type and wire it according to the correct wiring method.
3) The sensor is damaged. Use the multimeter current gear to measure the sensor good or bad, set the multimeter to the
current gear, series to the signal output of the sensor and the negative end of the sensor, check the current value (can not
be connected to the product acquisition end, so as not to cause measurement errors and errors in judgment).
4) pay attention to the two-wire sensor multimeter measurement method: the positive power supply connected to the
positive terminal of the sensor, the negative terminal of the sensor connected to the multimeter current gear red pen,
multimeter current gear black pen connected to the negative terminal of the power supply, you can view the current
value.
AO output terminal wiring errors.
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1) the user needs to check the wiring method of the acquisition module connected to our AO products, our AO products
are active outputs. For details, please refer to the chapter of "Analog Reduction Output (AO) Wiring".
2) the user can verify that our products are not connected to any load, and then the multimeter 0 ~ 20mA current grade
red pen connected to the AO signal end, the black pen connected to GND, you can view the current value.

8.2 LoRa-related issues

1. LoRa communication, what should I look for?
When testing the K62-DL20 module, it must be connected to a matching antenna or 50Ω dummy load, otherwise it
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will easily damage the transmitting module.
K62-DL20 often has different communication distance in different environments. The communication distance is
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often affected by temperature, humidity, obstacle density, obstacle volume, and electromagnetic environment, so we
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K62-DL20 User Manual
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