2．Quick Start; Hardware Preparation - Ebyte E840-TTL-NB03 User Manual

Nb wireless module

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Chengdu Ebyte Electronic Technology Co., Ltd.

2．Quick start

Before testing, please connect serial port line as per recommended circuit, there are SIM card and antenna.

1. Enter the AT command mode and send +++ in the serial port assistant (except that +++ does not need to

check to send a new line, other AT commands need to tick to send a new line to be valid), you must send +++

command 3s Sending any other AT command (except for restarting the AT command) can completely enter the

AT command mode.

2. After entering the AT command mode, use AT+CPIN to check the SIM card access:

For example: AT+CPIN

+OK=1

Indicates that the SIM card is connected and uses AT+CSQ to view the current signal strength:

For example: AT+CSQ+OK=26Indicates that the current signal strength is normal.

If the response is 99, the current signal strength is abnormal. Check whether the current antenna is connected

or the surrounding base station is abnormal.

3. Access server, AT+SOCK=TCPC, 116.62.42.192, 31687 (parameters are separated by commas in English

characters, and IP commands are separated by English characters).SOCK settings

For example: AT+SOCK=TCPC, 116.62.42.192, 31687

+OK

Indicates that the setting was successful.

4. Restart (all AT commands modify parameters, the device will take effect after restart) After the execution

command AT+REBT returns OK, the device restarts immediately. Here, the IP only performs the demonstration.

The actual connection is based on the IP of the server to be connected.

E840-TTL-NB03 User Manual

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