Mini DTU (Y211)

The product is equipped with RS232 and RS485 interfaces, only one of which can be enabled at a time (RS485 is enabled by default). To ensure the uniformity of our AT commands, all AT commands related to serial port and Socket functions include the corresponding serial port number.

Key Features

• Small size (74.622.618.1mm)
• Universal 4G CAT1 DTU
• Wide voltage power supply (9~36V)
• Optional hanging or rail mounting
• Software and hardware watchdog protection
• Optional RS232/RS485/TTL interfaces
• Supports 4-channel Socket transparent transmission
• Supports TCP/UDP/HTTP/MQTT/point-to-point transmission/SMS transparent transmission - supports offline caching
• Mainstream platform access: Alibaba Cloud, Huawei Cloud, Tencent Cloud, etc.
• Supports Modbus active collection and JSON reporting
• Hardware reliability: reverse connection protection, electrostatic level 4
• Supports remote upgrades
• Supports serial port, network, SMS AT commands

Key Attributes

Item	Value
Size	74.6*22.6*18.1mm
Operating Temperature	-35 ~ 75°C
Power Supply Voltage	9~36V DC
Power Supply Current	100mA 12VDC
Frequency Band	LTE-FDD:B1/B3/B5/B8 LTE-TDD:B34/B38/B39/B40/B41
Transmit Power	LTE-FDD:Class3(23dBm±2dB) LTE-TDD:Class3(23dBm+1/-3dB)
Baud Rate	1200 ~ 460800bps
Parity Bit	NONE/ODD/EVEN
Data Bits	8
Stop Bits	1/2

Two Operating Modes:

AT Command Configuration Mode

Data received on the serial port is executed as commands, and data sent from the network is discarded. In command mode, parameters can be queried and set, and the device will revert to transparent mode after a restart.

Transparent Mode

Data received on the serial port is forwarded via Socket, which is the default mode when the device is powered on.

Users can send AT commands through serial communication with a computer or MCU to query and set the parameters of this product. Each command line can only contain one AT command, with a maximum length of 256 bytes per command.

LED Lights

LED light details please go here