Waveshare Ethernet to UART Converter for Raspberry Pi Pico, 10/100M Ethernet


In stock

SKU: 1113362
  1. Operating mode: TCP/UDP
  2. UART TTL: 3.3V / 5V compatible
  3. Auto-MDI/MDIX, detect and switch cable type automatically
  4. Onboard jumpers for pin configurations
  5. Embedded Ethernet MAC and PHY layers
  6. Bi-direction transparent data transmission between UART and Ethernet
  7. 10/100M, full-duplex/half-duplex auto-negotiation Ethernet interface, 802.3-compliant


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Category: USB Interface Module

Ethernet To UART Converter For Raspberry Pi Pico, 10/100M Ethernet, Enabling Network Communication Through UART.The CH9121 is a transparent network serial port chip that supports bidirectional and transparent transmission of serial port data and network data. It supports four working modes: TCP CLIENT/SERVER and UDP CLIENT/SERVER. The serial port baud rate ranges from 300bps to 921600bps. Before using, you should set network and serial port parameters for the chip by the NetModuleConfig.exe software or serial commands. After the configuration is complete, the CH9121 saves the configuration parameters to the internal storage space. After the chip is reset, the CH9121 could work based on the saved configuration values.


  1. Standard Raspberry Pi Pico header, supports Raspberry Pi Pico series
  2. Onboard Ethernet to UART transparent transceiver, 2-CH UART, standalone transparent transmission for each channel
  3. Supports DHCP auto-obtained IP and DNS domain access
  4. Network parameter configuration like chip operating mode, port, IP, via host computer software or UART command
  6. Full-duplex or half-duplex UART communication supports RS485 RX/TX auto switch (external RS485 controller required)
  7. Supports virtual serial port software (provided)
  8. KEEPALIVE mechanism support

Package Includes:

1 x Waveshare Ethernet to UART Converter for Raspberry Pi Pico

SKU: 1113362 Category:
UART Baudrate


Operating Current (A)


Operating Temperature Range (°C)

-40 to 85

Operating Voltage(V)

3.3 to 5

Shipment Weight

0.019 kg

Shipment Dimensions

12 × 6 × 3 cm

3 Months Warranty

This item is covered with a standard supplier warranty of 3 months from the time of delivery against manufacturing defects only. This is a quality product & only manufacturing defects are covered under this warranty. Reimbursement or replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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Country Of Origin: China

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