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Table Of Contents
Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU(xxxSLxx-ETH)_V2.0-AT Instruction Set
Copyright ©2012–2022Chengdu Ebyte Electronic Technology Co., Ltd.
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1. "Basic function" AT command set
Instructions for use of E90-DTU (xxxSLxx-ETH) instruction manual:
1. Enter the AT command mode: the serial port sends +++ , send AT again within 3 seconds, and
the device returns +OK , then enter the AT command mode;
2. This instruction manual supports E90-DTU(230SL22-ETH)_V2.0, E90-DTU(230SL30-
ETH)_V2.0, E90-DTU(400SL22-ETH)_V2.0, E90-DTU(400SL30-ETH) _V2.0, E90-
DTU(900SL22-ETH)_V2.0, E90-DTU(900SL30-ETH)_V2.0 and other E90 gateways;
3. In the following text, "<CR><LF>" and "\r\n" represent line breaks in different text formats,
which are actually HEX (0x0D and 0x0A);
4. Support network AT command configuration, which can realize network AT configuration
through TCP/UDP transparent transmission mode, please do not use AT configuration in Modbus
gateway mode.
5. TCP server/TCP client use:
6. UDP Server/UDP Client Use: