Smallest microcontroller with working RF 433MHz receiver?

Using Arduino Microcontrollers
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I have tried everything to make work a Digispark Rev.3 Attiny85 with a RXB6 433MHz receiver.
I could not get it to work. On the ESP32 it works fine, no compiler errors with RCSwitch but:

The Goal is just to build a small device that can learn the RF-codes with a button, and react to them with a blinking led. The led will later be replaced with a beeper. It has to be low power because i want to place it in a small casing with a 9V-Battery as source. I got something working with an RX480 receiver but that needed 4 digital pins so i would lack the code learning button. The 6th pin is not usable because it has the reset and flash memory functions.

My questions are:

  1. Has someone done something similar with RF 433 MHz receiving on the Digispark 3 that actually worked and point me to the right library or receiver?

  2. Else if not, are there other boards or smart RF receivers that fit for my project and have working libraries for such RF receiving?

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You are not alone...
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Thank you :slight_smile: so far i am. All those links refer to authors who want to transmit == send data from a Digispark Attiny 85 via RF 433 modules. I want to receive.

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Sorry... what I meant was, others have tried...

"... whatever I did, I did not get my receiver to work..."

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