Sms Receiving; Sms Configuration/Query; Interconversion Between Modbus Rtu And Modbus Tcp - Ebyte E840-TTL-4G02E User Manual

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Chengdu Ebyte Electronic Technology Co.,Ltd.

4.4.2 SMS receiving

The device can receive remote SMS content in transparent transmission mode. The format is as follows:

data, the number is the sender's mobile phone number and data is the received short message content.

The device supports SMS remote configuration/inquiry parameters in transparent transmission mode. The format of

the command is:

<Head>AT+CMD，<Head>is the device SMS identifier，The factory default is "EbyteSMS" , CMD is the

corresponding command. For more informations, please check"E840-TTL-4G02E AT commands".

In this demo, use the mobile phone to query the SOCK1 link information of the device remotely.

E840-TTL-4G02E supports the interconversion between Modbus RTU and Modbus TCP. Enable this function, after

receiving data, the device will detect whether them are the Modbus RTU or Modbus TCP protocol. If data belong to one

of the two protocol, them will be converted. If not, only supports output/send raw data.

For example, the serial port receives the ModbusT RTU write-out command in the following format (hexadecimal):

01 06 00 01 00 01 19 CA（Modbus RTU）

When the interconversion function enable. Data received by the network is:

00 01 00 00 00 06 01 06 00 01 00 01（Modbus TCP）

Data sent by the network is:

00 01 00 00 00 06 01 06 00 01 00 01（Modbus TCP）

The serial port will output data as:

01 06 00 01 00 01 19 CA（Modbus RTU）

Note: In the Modbus TCP standard protocol, the transaction element identifier needs to be specified. In

E840-TTL-4G02E, the user can configure the value through AT+MTCPID, and when the value is configured to 0, the

receiving end All data conforming to the Modbus TCP protocol will be parsed, otherwise only packets with the same

application packet identifier and device configuration identifier will be converted.

+SMS REC：number

E840-TTL-4G02E User Manual

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