Feature Products

CH9121 Serial Port To Ethernet Single Chip Microcomputer Networking Module

Reference description:
CH9121 serial port to Ethernet module is equipped with CH9121 network string transparent transmission chip.
CH9121 integrates TCP/IP protocol stack, which can realize network data packet and serial data
Two-way transparent transmission, with TCP CLIENT, TCP SERVER, UDP
CLIENT, UDP SERVER 4 working modes, the highest serial port baud rate can be supported
Supports up to 92160Obps, which can be easily configured through host computer software or serial port commands, which is convenient
Fast.
Product parameter:
1. Built-in Ethernet media transport layer (MAC) and physical layer (PHY)
2. Realize two-way transparent transmission of serial data and network data
3. Support 10/10OM, full duplex/half duplex adaptive Ethernet interface, compatible with 802.3 protocol
Support MDI/MDIX line automatic conversion
5. Support DHCP to automatically obtain IP address, support DNS domain name access
6. Set the chip working mode, port, IP and other network parameters through the host computer software/serial AT command
7. Working mode supports TCP CLIENT, TCP SERVER and UDP
CLIENT, UDP SERVER 4 modes
8. The serial port baud rate supports 30Obps~92160Obps
9. String D TTL level, compatible with 3.3V and 5V
10. Serial support full-duplex and half-duplex serial communication, support RS485 transceiver automatic switching
11. Support DHCP to automatically obtain IP address function
12. Support 0~2000ms serial timeout time setting
13. Support DNS domain name system
14. Support KEEPALIVE mechanism
15.Supply voltage: 3.3V/5VPorduct Size:Package Include:1x CH9121 Serial Port To Ethernet Single Chip Microcomputer Networking Module

• Shipping Policy
• Item Location
• Payment Mathord
• Returns Policy
• About response

Shipping Policy1. We Ship to Worldwide
2. We ship your orders within 1-2 business days after the payment cleared.
3. Item shipped from China via china Post Airmail, reach most of the countries within 2 to 4 weeks.
4. Delivery time depends on destination and other factors, it may takes up to 20 days. If you don't receive
the item after 30 days,please keep in touch with us, we'll investigate and solve the delivery problem.
5. Import duties, taxes, and charges are not included in the item price or shipping cost. These charges
are the buyer's responsibility. Please check with your country's customs office to determine what these
additional costs will be prior to offerding or buying.Item LocationShenZhenPayment Mathord

1. We accept PAYPAL only.
2. Payment must be made within 7 days of sale closing (Unpaid dispute will automatically open when item
is not paid in 7 days).
3. PLEASE NOTE: SHIPPING&HANDING DOES NOT INCLUDE DUTIES, LOCATL TAXES OR ANY OTHER IMPORTATION FEES.
4. Please list your special requests (color, packages, value of declaration, etc.) in the NOTES SECTION
when you make payment

Returns Policy

1. Customer satisfaction is our top goal. All products are quality checked. They are new and in good
condition when shipped to our customers. If product is defective or damage upon arrival, or wrong
product shipped, please keep in touch with us immediately. Returns accepted within 14 days of delivery date
and item must be in original new condition, not worn or altered in any way with attached tags & wrap.
Otherwise deal is final. Return shipping must be paid by buyer.
2. Please keep in touch with us first if you have anyproblems/questions/concerns. We will be happy to resolve
any issues you may have in a cordial and friendly manner.
3. We appreciate your Positive response, and will do the same in return. PLEASE DO NOT leave
negative response without first communication with us. Please allow max 24 HOURS for us to respondAbout response

We maintain high standards of excellence and strive for 100% customer satisfaction! response is
very important to us. We request that you keep in touch with us immediately BEFORE you give us neutral or
negative response, so that we can satisfactorily address your concerns.It is impossible to address
issues if we do not know about them!