046 - MicroPython TechNotes: RF433 Transceiver

In this video, I will demonstrate how you can use an RF433 radio transceiver module with ESP32 using MicroPython.
For more details, visit my blog post at:
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- George Bantique | [e-mail]
#TechToTinker
#MicroPython #ESP32 #GorillaCell
#MicroPythonTutorials
#ESP8266 #Pico

[@Rick-hq5yg]

Great vid!😀

[@TechToTinker]

Thank you.

[@tecons5226]

Very Good 👏🏽 👏🏽 👏🏽 👏🏽

[@grgabriel3964]

Nice work 👍

[@TechToTinker]

Thanks po :)

[@mytechnotalent]

George I am excited to try this on a RPI Pico. I ordered a few generic 433 units to test and send data over this.

[@TechToTinker]

Generic RF433 units are usually noisy so you might need a better handling of it

[@mytechnotalent]

@@TechToTinker HI George I set them up in with a Pico, the same way you did with the ESP32 and it is very noisy only garbage comes out on the recv.

[@cedricvillani8502]

An easier way of playing with sub 1ghz is a Yardstick by GreatScott but it’s $99 otherwise you can find the same chip in a few modules for about $20 Michael Osmond is a good place to start 🎉

[@edinetgrunhed6000]

nice video, bro how about the logic voltage? is it 5v or 3.3v?

[@JayaprakashPXmen]

How can we connect multiple transmitter to a single receiver?

[@mytechnotalent]

George I am more interested in example 2. My question is how do you communicate with the 433 modules in example two as you do not reference them? Do you simply hook up the data pins to the appropriate spots? Can you explain how this is wired in more details?

[@TechToTinker]

Hi Kevin, I simply hookup it on a single pin. You may simply read it as a digital signal. And as I demonstrated, you can used it to transfer serial UART signal wirelessly.

[@mytechnotalent]

@@TechToTinker thanks!

[@ericfeld93]

how come all of the noice stoped? I'm trying to achieve the same thing with RPI pico, but I have 99% noice and only sometimes it picks the right data

[@paulweston1106]

Try using an antenna on each (straight length of solid core copper cable 172mm long) and then Drop the baudrate down to 1200 on both sides. The transmitter can take up to 12v so try to give it more power than just the 5v from the board. Use the 5V power to the receiver but as the Pico isn't 5v tolerant I would suggest using a logic level shifter on the data pin so that you only get 3v at the pin. You will probably still pick up some stray noise but I found this method got rid of most of it to the point where I can transmit a message reasonably reliably. I still wouldn't rely on these cheap modules for anything important though.