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Y201-W Mini Wi-Fi DTU Specification ​

Y201-W

Reference: Y201-W Technical Manual

Contents ​

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

1. Overview ​

Y201-W is the Wi-Fi model in the Y201 mini DTU family. It provides dual-serial to Wi-Fi data bridging and uses a 240 MHz 32-bit RISC-V processor with 5 to 36 VDC wide-range power input. Each serial port can be configured independently with dual Socket links, making it suitable for industrial data collection, building control, remote maintenance, and wireless networking.

The device supports AP, STA, and AP+STA wireless modes, along with TCP, UDP, HTTP, and MQTT. It also supports Modbus TCP to Modbus RTU conversion and can be configured through the built-in Web UI or AT commands.

ItemDescription
PositioningDual-serial to Wi-Fi industrial DTU
Processor32-bit RISC-V, up to 240 MHz
Serial Ports2 ports, RS485 or RS232 depending on model
Wireless ModesAP / STA / AP+STA
Power Input5 to 36 VDC
ConfigurationWeb UI, serial AT, network AT

Highlights ​

  • Dual serial ports with dual Socket channels per port for multi-center data paths
  • Supports 2.4 GHz and 5 GHz operation with Wi-Fi 6 compatibility
  • Built-in Modbus RTU to Modbus TCP gateway for SCADA integration
  • Registration packets, heartbeat packets, auto reconnect, and fault self-recovery
  • Supports Web-based upgrade and HTTP remote upgrade

2. Ordering Information ​

2.1 Model Naming ​

Y201-W-XX

  • W: Wi-Fi uplink
  • XX: Serial interface type, 232 or 485

2.2 SKU List ​

SKUSerial InterfaceTypical Application
Y201-W-232Dual RS232Serial networking and control cabinet retrofit
Y201-W-485Dual RS485Industrial bus and instrumentation systems

2.3 Standard Package ​

1 x Y201-W device, electronic documentation, warranty information.
Optional accessories: SMA antenna, serial cable harness, power adapter, DIN mounting accessories.

3. Key Features ​

  1. Dual Serial, Dual Links: Two serial ports, each with Socket A and B for parallel communication paths.
  2. Broad Protocol Support: Supports TCP client/server, UDP client/server, HTTP client, and MQTT.
  3. Flexible Wireless Networking: Supports AP, STA, and AP+STA; AP mode can serve 1 to 8 terminals.
  4. Modbus Gateway: Supports Modbus TCP to Modbus RTU conversion.
  5. Enhanced Data Handling: Supports packetization by length or interval, plus registration and heartbeat packets.
  6. Comprehensive Maintenance: Supports LAN discovery, network AT, serial upgrade, and network upgrade.
  7. Automatic Recovery: Supports reboot on network inactivity timeout for unattended deployments.

4. Technical Specifications ​

4.1 Electrical and Environmental ​

ParameterSpecification
Dimensions74 x 27 x 15.6 mm, excluding tabs and terminal
Operating Temperature-40 to 85 C
Operating Humidity5 to 95% RH, non-condensing
Power Connector2.54 x 7P terminal
Supply Voltage5 to 36 VDC
Current Consumption55 mA @ 12 V

4.2 Wireless Specifications ​

ParameterSpecification
StandardCompatible with 802.11ax / 802.11ac and fully backward-compatible with 802.11b/g/n
ModeAP, 1 to 8 STA / STA / AP+STA
TX Power20.5 dBm max
Antenna InterfaceSMA connector, external thread and female center
SecurityWPA-PSK / WPA2-PSK / WPA3-PSK

4.3 Serial Specifications, 2 Ports ​

ParameterSpecification
Interface Type2.54 terminal, RS232 or RS485
Baud Rate1200 to 460800 bps, default 115200
ParityNONE / ODD / EVEN, default NONE
Data Bits7 / 8, default 8
Stop Bits1 / 2, default 1
Hardware Flow ControlNot supported

4.4 Network and Protocol Capability ​

ItemSpecification
Network ProtocolsDHCP / DNS / TCP / UDP / HTTP / ICMP / MQTT
TCP Server ConcurrencyUp to 8 clients per port
Socket ModesSocket A / B per serial port; only port 1 Socket A enabled by default
Packet Length8 to 1460 bytes, default 1460
Packet Interval0 to 1000 ms, 0 = adaptive

4.5 Software and Maintenance ​

ItemDescription
Built-In Web UIParameter setting, status display, firmware upgrade
AT CommandsSerial AT and network AT
LAN DiscoveryDefault UDP port 8168, keyword HuayunIOT
Firmware UpgradeWeb upgrade and HTTP download upgrade

5. Interfaces and Indicators ​

5.1 LEDs ​

LEDMeaning
PowerPower indicator
WorkSlow blink: Wi-Fi connected; fast blink: Wi-Fi disconnected
TX1 / RX1Port 1 transmit / receive activity
TX2 / RX2Port 2 transmit / receive activity

5.2 Button ​

ButtonFunction
ResetPress and hold for more than 3 s to restore default parameters

6. Installation and Access ​

6.1 Quick Access ​

  1. Connect the device to the field controller with the serial cable.
  2. Power on the device.
  3. Search for and connect to the default hotspot HY-W202.
  4. Open 192.168.4.1 in a browser.
  5. Log in with admin/admin.
  6. Configure Socket parameters on the Port page and reboot the device.

6.2 Debug Example, TCP Server ​

Following the vendor example, set Socket A on Port 1 to TCP server with port 6666. After reboot, use a TCP client to connect to 192.168.4.1:6666 for transparent transmission testing.

6.3 Mechanical Dimensions ​

Y201-W Dimensions

This dimension drawing applies to the Y201 mini enclosure and can be used as an installation reference for the Y201-W.

7. Application Notes ​

  • Wireless serial bridging: Bring traditional serial devices onto WLAN without additional Ethernet cabling.
  • Point-to-point communication: Supports AP and STA combinations for point-to-point wireless transmission.
  • Modbus retrofit: Use gateway mode for Modbus RTU to Modbus TCP conversion.
  • Cloud connectivity: Supports MQTT and HTTP client uplink, including Alibaba Cloud mode.
  • Remote maintenance: Supports network AT, LAN discovery, and HTTP upgrade for remote service.

For detailed parameter settings and AT commands, see the Y201-W 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