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Y201-L Mini LoRa DTU Specification
Reference: Y201-L Technical Manual
Contents
- Overview
- Ordering Information
- Key Features
- Technical Specifications
- Interfaces and Indicators
- Mechanical
- Application Notes
1. Overview
Y201-L is a mini LoRa DTU for bidirectional transparent data transmission between a serial interface and a LoRa link. It operates in the 410 to 493 MHz band and supports point-to-point LoRa communication with broadcast, fixed-point, and master-slave modes.
Typical application areas include power systems, transportation, fire protection, industrial production, meteorology and environmental monitoring, agriculture and forestry, mining, and property management.
| Item | Description |
|---|---|
| Product Type | Industrial mini LoRa DTU |
| Primary Use | Bidirectional wireless transparent transmission |
| Frequency Band | 410 to 493 MHz |
| Communication Distance | Up to 5 km |
| TX Power | 22 dBm |
| Serial Interface | Single-port RS232, RS485, or 3.3 V TTL, depending on the ordered variant |
Highlights
- Compact form factor for small control boxes and end nodes
9 to 36 VDCsupply input- Supports broadcast, fixed-point, and master-slave modes, plus relay networking
- Configure serial and LoRa parameters through AT commands. The encryption key is write-only.
- Supports serial firmware upgrade and backup-parameter recovery through Reload
2. Ordering Information
2.1 Model Configuration
Y201-L is a mini DTU for LoRa data transmission. The serial interface is an ordered variant: RS232, RS485, or 3.3 V TTL. Check the interface version when ordering.
For family codes and examples, see Model Naming.
2.2 Configuration
| Model | Serial Interface | Description |
|---|---|---|
| Y201-L | RS232 / RS485 / 3.3 V TTL | Ordered interface variant with AT command and transparent transmission support |
3. Key Features
- Long-Range LoRa Transmission: Anti-interference low-band LoRa with a communication distance up to
5 km. - Serial Configuration: Supports
1200 to 460800 bps,7/8data bits,1/2stop bits, andNONE/ODD/EVENparity. - Dual Serial Modes: Supports transparent mode by default and AT command mode for configuration and maintenance.
- Packetization: Triggers forwarding by length or inter-character interval to improve link efficiency.
- Communication Modes: Supports broadcast, fixed-point, and master-slave modes, plus relay networking.
- Data Security: Supports the
AT+KEYLoRa encryption key, with a length of1 to 16characters. The key is write-only. - Maintenance Support: Supports serial firmware upgrade and backup-parameter recovery with the Reload button.
4. Technical Specifications
4.1 Electrical and Environmental
| Parameter | Specification |
|---|---|
| Supply Voltage | 9 to 36 VDC |
| RX Current | 20 mA @ 12 V |
| TX Current | 40 mA @ 12 V |
| Operating Temperature | -40 to 85 °C |
| Operating Humidity | 5 to 95% RH |
4.2 RF Specifications
| Parameter | Specification |
|---|---|
| Operating Band | 410 to 493 MHz |
| TX Power | 22 dBm |
| Frequency Setting | Base frequency + step x channel |
| Default Base Frequency | 410 MHz |
| Default Step | 1 MHz |
| Default Channel | 20 |
| Speed Level | 1 to 9, default 5 |
4.3 Serial Specifications
| Parameter | Specification |
|---|---|
| Serial Type | Single-port RS232, RS485, or 3.3 V TTL, depending on the ordered variant |
| Baud Rate | 1200 to 460800 bps, default 115200 |
| Parity | NONE / ODD / EVEN, default NONE |
| Data Bits | 7 / 8, default 8 |
| Stop Bits | 1 / 2, default 1 |
| Hardware Flow Control | NFC |
4.4 Packetization and AT Command Limits
| Parameter | Specification |
|---|---|
| Packet Length Threshold | 5 to 252 bytes, default 252 |
| Packet Interval Threshold | 0 to 300 ms, default 5 ms |
| Single AT Command Length | Maximum 256 bytes; 252 bytes recommended |
5. Interfaces and Indicators
5.1 Hardware Interfaces
| No. | Interface | Description |
|---|---|---|
| 1 | Power Input | DC power input |
| 2 | Serial Interface | RS232 / RS485 / 3.3 V TTL, depending on the ordered variant |
| 3 | GND | Signal ground |
| 4 | Grounding Screw | Chassis grounding |
| 5 | LoRa Antenna Port | Antenna connection |
| 6 | Reload Button | Parameter recovery and upgrade assist |
5.2 LEDs and Status
| Indicator | Meaning |
|---|---|
| Power | Power indicator, steady on after power-up |
| WORK | Regular blinking after module initialization |
| TX | Flashes once when a LoRa packet is transmitted |
| RX | Flashes once when a LoRa packet is received |
5.3 Restore Backup Parameters
- Pull the Reload input low for
3 to 10 sto restore the backup parameter set. This is equivalent toAT+RSTCFG.
6. Mechanical
| Parameter | Specification |
|---|---|
| Dimensions | 74.6 x 22.6 x 16 mm, excluding tabs, antenna connector, and terminal |
7. Application Notes
- Broadcast transparent transmission: Build point-to-point or broadcast LoRa links when both ends use the same base frequency, step, channel, 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, while the slave returns data transparently. Configure the retransmission interval and count as needed.
- 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: [email protected]
- Website: www.yengear.com