Quick Searches

USB relay
  LPT relays
  RS485 relays


New Products



Price: €299.00
5xUDP4D 10xUDP8D

5xUDP4D 10xUDP8D

Price: €950.00
R4S4CR 2000000871

R4S4CR 2000000871

Price: €39.00

Latest News

To all customers and suppliers,
With reference to the current international health situation we confirm the normal activity of our company. There will be no delay in shipments and the workflow will remain as it has been.
We hope that you all are in good health and that the situation will be resolved as soon as possible.

LAN UDP to RF433MHz Wireless Transmitter Module

RF433MHz LAN UDP Wireless RF Module. Control KMtronic RF433MHz relays via Internet.
  • Code: SS_UDP_RF433
  • Manufacturer: KMtronic
  • In stock: 1088

Price: €47.00


The package includes:
- One LAN UDP to RF433MHz Wireless Transmitter Module
- Omni-directional SMA male antenna 433 MHz

KMTronic LTD


- Control KMtronic RF433MHz relays via Internet.

- UP to 120 relay channels (15 x 8 RF433MHz Eight Channel Relay Board )

Requires external 12 volt DC / 500mA power supply

Standby current:
 - 58mA

110 mm / 55 mm / 25 mm

IP address:
Webserver Port: 80 (for initial configuration with username/password)
Subnet Mask:
Default Gateway:
UDP Port: 12345
Username: admin
Password: admin

Reset to Default Settings:
Hold Reset button for 10 seconds

Wireless Data Transmittion Module:
CC1101 Low-Power RF Transceiver
(Texas Instruments)

Commands (ID01):
FIRST channel commands:
OFF command : FF 01 00 (HEX) or 255 1 0 (DEC)
ON command : FF 01 01 (HEX) or 255 1 1 (DEC)
EIGHT channel commands:
OFF command : FF 08 00 (HEX) or 255 8 0 (DEC)
ON command : FF 08 01 (HEX) or 255 8 1 (DEC)

Status read (ID01):
Command - FF A1 00
Reply - FF A1 xx xx xx xx xx xx xx xx
where xx is: 00 if relay is OFF, 01 if relay is ON

In open area max 350 meters


UDP Test Software example including source code (C#):

KMTronic UDP Test
KMTronic UDP Test Software Source






Software examples:






Additonal information

  Payment accepted:
Credit Card payments, PayPal

Bank Wire Transfer

We ship WORLDWIDE through TNT.

  Import duties, taxes and charges are not included in the item price or shipping charges. These charges
are the buyer's responsibility. Please check with your country's customs office to determine what these additional
costs before you purchase.

Shopping Cart

Cart is empty.



Local Time


Work time
Monday - Friday
9.00am - 5.00pm





Technical support


Recently Viewed