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Y201-L Mini LoRa DTU Specification ​

Y201-L

Reference: Y201-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 ​

Y201-L is the LoRa model in the Y201 mini DTU family, designed for low-power, long-range serial wireless transmission. It operates in the 410 to 493 MHz band and supports point-to-point LoRa communication, providing bidirectional transparent transmission between a serial port and a LoRa link.

It is suitable for power systems, transportation, fire protection, industrial production, meteorology, agriculture, mining, and property management, especially where short-distance wired serial links need to be replaced.

ItemDescription
Product TypeIndustrial mini LoRa DTU
Primary UseWireless transparent transmission and long-range data backhaul
Frequency Band410 to 493 MHz
Typical RangeUp to about 5 km, depending on antenna and environment
TX PowerUp to 22 dBm
Serial InterfaceSingle-port 3.3 V TTL

Highlights ​

  • Compact form factor for small control boxes and end nodes
  • 9 to 36 VDC wide-range input for common industrial power systems
  • Supports broadcast, fixed-point, master-slave, and relay networking modes
  • Serial, RF, and encryption parameters can all be configured through AT commands
  • Supports serial firmware upgrade and one-touch parameter recovery through Reload

2. Ordering Information ​

2.1 Model Naming ​

Y201-L-IF

  • L: LoRa data transmission model
  • IF: Serial interface type, typically TTL; RS485 and RS232 variants are available for custom projects

2.2 SKU List ​

SKUSerial InterfaceDescription
Y201-L-TTL3.3 V TTLStandard version with full AT command and transparent transmission support

2.3 Standard Package ​

1 x Y201-L module, electronic documentation, warranty information.
Optional accessories: LoRa antenna, power adapter, serial adapter tools.

3. Key Features ​

  1. Long-Range LoRa Transmission: Strong diffraction and anti-interference capability in the low-frequency band, with up to 5 km typical range in open areas.
  2. Flexible Serial Configuration: Supports 1200 to 460800 bps, 7/8 data bits, 1/2 stop bits, and NONE/ODD/EVEN parity.
  3. Dual Serial Modes: Supports transparent mode by default and AT command mode for configuration and maintenance.
  4. Smart Packetization: Triggers forwarding by length or inter-character interval to improve link efficiency.
  5. Multiple Communication Strategies: Supports broadcast, fixed-point, master-slave, and relay networking.
  6. Enhanced Data Security: Supports AT+KEY for LoRa encryption string, 1 to 16 characters.
  7. Maintenance Friendly: Supports serial firmware upgrade and default reset with the Reload button.

4. Technical Specifications ​

4.1 Electrical and Environmental ​

ParameterSpecification
Supply Voltage9 to 36 VDC
RX Current20 mA @ 12 V
TX Current40 mA @ 12 V
Operating Temperature-40 to 85 C
Operating Humidity5 to 95% RH, non-condensing

4.2 RF Specifications ​

ParameterSpecification
Operating Band410 to 493 MHz
TX Power22 dBm max
Frequency SettingBase frequency + step x channel
Default Base Frequency410 MHz
Default Step1 MHz
Default Channel20
Speed Level1 to 9, default 5

4.3 Serial Specifications ​

ParameterSpecification
Serial TypeSingle-port 3.3 V TTL
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 ​

Y201-L Dimensions

ParameterSpecification
Dimensions74.6 x 22.6 x 16 mm, excluding tabs, antenna connector, and terminal
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 Y201-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