Do I need to add my own antenna?

Depends on range to the access point it is connecting to. I have mine installed on wall socket about 10 feet away and have no transmission issues.

The launch distance on this says 20-200 meters. Is it able to transmit and receive a signal that it less than 20 meters?

yes i would think there is no reason to have a minimum distance. I think they probably mean it will work up to 20 meters for sure and it might work up to 200 under certain conditions.

Is it possible to change the frequency of both the receiver and trasmitter?

No. See the can on the transmitter, where it says 315? You would have to change to different frequency component. If you want a 433MHz, then just buy that version. The receiver might be somewhat adjustable, but no idea how much.

Do these have to be used for data? Or are these a direct 1 to 1 from signal to output? Could I use these just the wirelessly fire a relay?

“Data” is simply encoded as on or off, and checked by the receiver at specified time intervals. It can definitely be used to fire a relay, or toggle one.

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HiLetgo 315Mhz RF Transmitter and Receiver Module link kit for Arduino/ARM/MCU/Raspberry pi

Product ID: 9730235

Details

Special Feature
Compatibility
Brand
HiLetgo
Connectivity Technology
USB
Power Source
Corded
Product Dimensions
0.75"L x x

€ 11.95

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Description

HiLetgo 315Mhz RF Transmitter and Receiver Module link kit for Arduino/ARM/MCU/Raspberry pi Receiver module parameters: 1.Product Model: MX-05V 2.Operating voltage: DC5V 3.Quiescent Current: 4MA 4.Receiving frequency: 315Mhz 5.Receiver sensitivity:-105DB 6.Size: 30 * 14 * 7mm 7.External antenna: 32CM single core wire, wound into a spiral Technical parameters of the transmitter head 1.Product Model: MX-FS-03V 2.Launch distance :20-200 meters (different voltage, different results) 3.Operating voltage :3.5-12V 4.Dimensions: 19 * 19mm 5.Operating mode: AM 6.Transfer rate: 4KB / S 7.Transmitting power: 10mW 8.Transmitting frequency:315Mhz 9.An external antenna: 25cm ordinary multi-core or single-core line 10.Pinout from left → right: (DATA; VCC; GND) Package Included: 1 x Receiver module 1 x Transmitter Module

Specifications

ASIN	B00LNADJS6
Additional Features	Cross-Platform Compatibility
AntennaDescription	32CM single core wire (receiver), 25cm ordinary multi-core or single-core line (transmitter)
Audio Input	Optical TOSLINK
Audio Output Mode	Stereo
Audio Output Type	Stereo
Best Sellers Rank	#84 in MP3 Player FM Transmitters
Brand	HiLetgo
Color	Green
Compatibility Options	Arduino, ARM, MCU, Raspberry pi
Compatible Devices	Arduino, ARM, MCU, Raspberry pi
Connectivity Technology	USB
Connector Type Used on Cable	USB Type A
Control Method	App
Customer Reviews	3.6 out of 5 stars 150 Reviews
Hardware Interface	Radio Frequency
Human Interface Input	Unknown
Installation Type	manual wiring
Item Dimensions L x W x H	0.75"L x 0.55"W x 0.75"H
Item Weight	0.02 kg
Manufacturer	HiLetgo
Model Name	MX-05V
Mounting Type	[ASSUMPTION] Wall Mount
Number of Channels	1
Power Source	Corded Electric
Product Dimensions	0.75"L x 0.55"W x 0.75"H
Special Feature	Cross-Platform Compatibility
Supported Application	all applications across compatible devices
Supported Media Type	WirelessAudioAdapter
Supported Standards	RF 315MHz
UPC	797698770284
Wireless Compability	Radio Frequency

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€ 11.95

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Slovakia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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