Small RF ASK Sender

This sender breakout board enables you to send data on the designated frequency. This is a 3.3V board. You cannot operate it with 5V.

This sender is often sold as a kit together with the receiver RX470-4 or WL101-341.

Technical Data

Item Value
Voltage 2.0-3.6V
Frequency 433MHz or 315MHz
Output Power >11dBm / >12.5mW
Operating Current <6mA
Modulation Mode AM (OOK)
Transmission Rate <20 Kbps
Distance 20-100m
Size 16x12x1mm


The board comes with four pins labeled on the back side.

Pin Description
- negative voltage/GND
+ 2.0-4.6V
DAT data in
EN enable pin, not connected


The antenna needs to be soldered to the solder pad marked TUO.

Always operate senders with an antenna. If no designated antenna is at hand, use a plain 17.3cm wire for 433MHz, and a 23.8cm wire for 315MHz.

See Also



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(content created Apr 18, 2024)