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Y211-L LoRa DTU Specification ​

Y211-L

Reference: Y211-L Technical Manual

Contents ​

  1. Overview
  2. Ordering Information
  3. Key Features
  4. Technical Specifications
  5. Interfaces and Indicators
  6. Mechanical and Installation
  7. Application Notes

1. Overview ​

Y211-L is an industrial serial-to-LoRa converter built for long-range wireless replacement of wired serial links. It operates in the 410 to 493 MHz band and supports point-to-point and multi-node networking, including broadcast, fixed-point, master-slave, and relay modes. With up to 30 dBm transmit power and multiple serial interface options, it is designed for stable data backhaul in noisy or hard-to-wire industrial environments.

It is well suited for utility metering, pump stations, agriculture, environmental monitoring, factory retrofits, and other deployments where RS485, RS232, or TTL devices must communicate over long distance without cellular service.

ItemDescription
Product TypeIndustrial LoRa serial converter
Primary UseLong-range wireless serial bridging and data backhaul
Frequency Band410 to 493 MHz
Typical RangeUp to about 10 km, depending on antenna and environment
TX PowerUp to 30 dBm
Serial InterfaceSingle serial port, RS485 / RS232 / TTL depending on model

Highlights ​

  • Up to 10 km open-area LoRa link for remote serial devices
  • 30 dBm high-power radio improves coverage in complex field environments
  • Supports broadcast, fixed-point, master-slave, and relay networking
  • Available in RS485, RS232, or TTL versions for different host devices
  • AT-command setup, serial upgrade, and one-touch recovery simplify maintenance

2. Ordering Information ​

2.1 Model Naming ​

Y211-L-IF

  • L: LoRa data transmission model
  • IF: Serial interface type, available as RS485, RS232, or TTL depending on project requirements

2.2 SKU List ​

SKUSerial InterfaceDescription
Y211-L-RS485RS485Standard industrial field version
Y211-L-RS232RS232Direct connection to serial hosts
Y211-L-TTL3.3 V TTLEmbedded controller board integration

2.3 Standard Package ​

1 x Y211-L device, electronic documentation, warranty information.
Optional accessories: LoRa antenna, power adapter, serial adapter tools.

3. Key Features ​

  1. Up to 10 km LoRa Link: Long-range wireless serial communication for open-area deployments.
  2. 30 dBm High-Power Radio: Stronger coverage and anti-interference performance for industrial sites.
  3. RS485, RS232, or TTL Options: Match PLCs, meters, controllers, and embedded boards.
  4. Multiple Networking Modes: Broadcast, fixed-point, master-slave, and relay support flexible topologies.
  5. Flexible Serial and Packet Settings: Adjustable baud rate, framing, packet length, and packet interval.
  6. LoRa Encryption Support: Protect wireless data with configurable keys.
  7. Easy Setup and Recovery: AT commands, serial firmware upgrade, and Reload reset simplify maintenance.

4. Technical Specifications ​

4.1 Electrical and Environmental ​

ParameterSpecification
Supply Voltage9 to 36 VDC
RX Current24 mA @ 12 V
TX Current280 mA @ 12 V
Operating Temperature-40 to 80 C
Operating Humidity5 to 95% RH, non-condensing

4.2 RF Specifications ​

ParameterSpecification
Operating Band410 to 493 MHz
TX Power30 dBm max
Frequency SettingBase frequency + step x channel
Default Base Frequency410 MHz
Default Step1 MHz
Default Channel0
Speed Level1 to 9, default 5

4.3 Serial Specifications ​

ParameterSpecification
Serial TypeSingle serial port, RS485 / RS232 / TTL depending on model
Baud Rate1200 to 460800 bps, default 115200
ParityNONE / ODD / EVEN, default NONE
Data Bits7 / 8, default 8
Stop Bits1 / 2, default 1
Hardware Flow ControlNFC

4.4 Packetization and AT Command Limits ​

ParameterSpecification
Packet Length Threshold5 to 252 bytes, default 252
Packet Interval Threshold0 to 300 ms, default 5 ms
Single AT Command LengthRecommended maximum 252 bytes

5. Interfaces and Indicators ​

5.1 Hardware Interfaces ​

No.InterfaceDescription
1Power InputDC power input
2Serial InterfaceRS485 / RS232 / TTL, depending on model
3GNDSignal ground
4Grounding ScrewChassis grounding
5LoRa Antenna PortAntenna connection
6Reload ButtonParameter recovery and upgrade assist

5.2 LEDs and Status ​

IndicatorMeaning
PowerPower indicator, steady on after power-up
WORKRegular blinking after module initialization
TXBlinks when a LoRa packet is transmitted
RXBlinks when a LoRa packet is received

5.3 Restore Default Parameters ​

  • Pull the Reload input low or hold Reload for 3 to 10 s to restore default parameters, equivalent to AT+RSTCFG.

6. Mechanical and Installation ​

ParameterSpecification
Dimensions71.5 x 48.6 x 23.7 mm
MountingSide-tab mounting or cabinet internal fixing, depending on project structure

Installation recommendations:

  • Add proper upstream protection on the power input, such as fuse and surge suppression.
  • Keep the antenna away from high-current wiring to avoid near-field interference.
  • Keep serial cables short and make sure the ground reference is consistent.
  • In outdoor or high-interference environments, use shielding and reliable grounding.

7. Application Notes ​

  • Broadcast transparent transmission: Build point-to-point or point-to-multipoint LoRa links quickly when both ends share the same frequency and speed settings.
  • Fixed-point communication: Use target address and channel for directional forwarding in multi-node networks.
  • Master-slave communication: The master sends framed data and the slave can return data transparently, with retransmission support.
  • Relay networking: Use relay enable, group ID, and routing rules for multi-hop forwarding and longer coverage.

For AT commands, communication mode details, and configuration examples, see the Y211-L Technical Manual.

  • Manufacturer: Hunan YenGear Tech Co., Ltd.
  • Address: Room 21014, Building 1, Fudi Xingguang Tiandi, Yingxin Road, Yuhua District, Changsha, Hunan, China
  • Email: hi@yengear.com
  • Website: www.yengear.com