# Make wireless connection with one Arduino-315/433 MHz Transmitter/receiver? **URL:** \ **Category:** General Guidance\ **Created:** [September 2, 2015, 8:46pm UTC](https://forum.arduino.cc/t/make-wireless-connection-with-one-arduino-315-433-mhz-transmitter-receiver/333061 "2015-09-02T20:46:20Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![drg92a](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/drg92a/32/1174199_2.png) [@drg92a](https://forum.arduino.cc/u/drg92a)\ **Post date:** [September 2, 2015, 8:46pm UTC](https://forum.arduino.cc/t/make-wireless-connection-with-one-arduino-315-433-mhz-transmitter-receiver/333061/1 "2015-09-02T20:46:20Z")
Hello, This is my first post in this forum so Hello to everybody! I have RF 315/433 MHz Transmitter-Receiver Module for Arduino and I make the comunication with 2 Arduinos and everything works fine. But the problem is that I want to use only an 1 Arduino for the receiver and for the transmitter I want only want to put a push button (and somehow a 1.5V(3v) battery) without using the second Arduino. Is this possible? PS: I search it on Google, but without success. Thanks. ---
**Author:** ![DrAzzy](https://avatars.discourse-cdn.com/v4/letter/d/eb9ed0/32.png) [@DrAzzy](https://forum.arduino.cc/u/DrAzzy)\ **Post date:** [September 2, 2015, 9:33pm UTC](https://forum.arduino.cc/t/make-wireless-connection-with-one-arduino-315-433-mhz-transmitter-receiver/333061/2 "2015-09-02T21:33:18Z")
You need some sort of microcontroller on the transmitter (assuming you mean the ones like this [http://www.ebay.com/itm/433Mhz-RF-transmitter-and-receiver-link-kit-for-Arduino-ARM-MCU-WL-/140719918135](http://www.ebay.com/itm/433Mhz-RF-transmitter-and-receiver-link-kit-for-Arduino-ARM-MCU-WL-/140719918135) - no endorsement) - they require you to send a pattern, and the receiver listens and has to pick that out of the noise. If you didn't send a pattern, the receiving device couldn't differentiate it from noise due to the way the automatic gain adjustment works - constant signals can't be detected (it adjusts so the duty cycle is around 50%, even if it takes amplifying the noise to do so). There are some cheapo 433mhz devices that have a little keyring transmitter, which has in it a chip that does that in response to button presses (you can find them on ebay), or you could get a cheap, small arduino board (like a nano or pro mini - both are like 2-3 bucks on ebay), and use that to control it. ---
**Author:** ![drg92a](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/drg92a/32/1174199_2.png) [@drg92a](https://forum.arduino.cc/u/drg92a)\ **Post date:** [September 2, 2015, 9:53pm UTC](https://forum.arduino.cc/t/make-wireless-connection-with-one-arduino-315-433-mhz-transmitter-receiver/333061/3 "2015-09-02T21:53:27Z")
Thanks for the quick answer! Yes, this is the module it is the cheapest one. Yeah I know that I could use a cheap Arduino board, but only just for a pushbutton(and the Transmitter module), I think, is it a waste of the microcontroller power and I could use it in other projects. Maybe if someone have a different idea to wirelessly transmit(and recive) a signal with some DIY circuit. ---
**Author:** ![drg92a](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/drg92a/32/1174199_2.png) [@drg92a](https://forum.arduino.cc/u/drg92a)\ **Post date:** [September 3, 2015, 9:22am UTC](https://forum.arduino.cc/t/make-wireless-connection-with-one-arduino-315-433-mhz-transmitter-receiver/333061/4 "2015-09-03T09:22:51Z")
Sorry for my double-post, but this is not possible without using 2Arduinos/microcontrollers? ---
**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\ **Post date:** [May 5, 2021, 5:35pm UTC](https://forum.arduino.cc/t/make-wireless-connection-with-one-arduino-315-433-mhz-transmitter-receiver/333061/5 "2021-05-05T17:35:58Z")
Closed on May 5, 2021, 5:35pm UTC