You are reading a single comment by @Gordon and its replies.
Click here to read the full conversation.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
I think maybe the 3.3v suggestion was a bit optimistic. I tried on a second RX module and had no luck with it either - I think maybe I was just lucky with the first one I tried (or I had an exceptionally strong transmitter).
What you're getting at Vbat voltages looks about right though. The 433Mhz band is insane. It's unregulated and is used for so much stuff that there's pretty much constant noise on it.
As I understand it, the receivers have an automatic gain control on them, so the idea is when something nearby transmits, it drowns out everything else for a short time and hopefully you get the right signal - however most stuff sends the signal a few times just to be sure!
Anyway, it makes it pretty important that the receiver code on the Espruino executes really quickly, as you could be getting 500-1000 pulses per second.