Ebyte E840-DTU User Manual page 8

Chengdu Ebyte Electronic Technology Co,;Ltd E840-DTU(NB-03) User Manual
(1) Place the SIM card in the E840-DTU (NB-03) card slot and connect to the computer using the above connection
method. Open the COM debugging assistant software, select the corresponding COM port number, baud rate and
other parameters (115200 baud rate), and open the COM port.
(2) When the E840-DTU (NB-03) is powered on (please note that the reset pin is high), the POWER light is on to
indicate that the radio is working normally.
(3) E840-DTU (NB-03) has two working modes: network transparent transmission mode and cloud platform
working mode; the E840-DTU (NB-03) configuration tool can be used to configure the working mode, or it can be
configured by AT command.
(4) After the configuration is completed, you can do the test. Please note that the maximum data of a single packet in
the network transparent transmission mode is 486, the maximum data of a single packet of the cloud platform
working mode is 100, and the interval of sending data is no less than 5s.
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