kwmobile 3x 433 MHz transmitter receiver wireless module for Arduino and Raspberry Pi

kwmobile goods tend to be good quality and these work fine. Sending data via RF (radio frequency) tends to be noisy and hit & miss and frowned on by the techo snobs whose alternatives like 2.4ghz also has range problems. These are ideal for beginners and there are loads of tutorials out there and you will need to 'include' the Radio Head library -all for free. DO NOTE if you are setting up they need to be very close ( I mean inches) to each other. Once you are happy they talk to each other a must is to attach and aerial. This is simply a 17cm ( near 6 inch) wire to both the transmitter and receiver. No need for a thick wire and insulation on the wire makes no difference. The Transmitter has a hole in the bottom corner easy to solder to and the Receiver has a soldered joint in the corner edge near the coil - a bit trickier to solder. Once done you are laughing. I put the wires inside a straw to stop them flopping down. Using mine to monitor a rain sensor in the garden (you need an Arduino at both ends by the way as there are no 'remote sensors') and for distance of about 25 feet and thru' two solid walls it works. Watch too that you external sensor if running off a power bank can got to sleep and needs rebooting and I've yet solve that.

Found an example online, worked like a charm first time. A bit fiddly to solder the antenna, too close to another wire, so 4 stars

Finally got around to trying these out. I found that without an antenna i got no response even at 1-2cm away from each other. So i ordered some of those copper antennas and bobs your uncle. I used a heltec HT12E & HT12D IC chip to encode and decide the signal. It actually works and pretty fast response as well. I was trying these and comparing against a 4ch 433 rf module. I actually found these work faster than my 4ch module. Either way they work and work fast. Only downside was these didn’t come with any antennas. So had to buy them as a pack of 10. Still worth the money and do the job.

I bought these (3 pack) to use with my Raspberry Pi 3B and remote control plug sockets (I only needed the one set but a couple spares might come in useful for future projects).There is no documentation but the internet has lots of posts about how to use them. The receiver picks up a LOT of noise and it's range is limited, struggles to get a signal a couple feet away, without an antennae (I haven't tried adding one yet), I believe this is common with this type of receiver. I tried a number of different software modules that couldn't detect a signal but eventually found "433Utils" which DID identify the signals from my remote. The transmitter works much better and my Raspberry Pi can now switch on and off sockets around my flat, it works about 30 feet away through a couple interior walls (max. I've tried might worked even further).

One of the worst soldering I have seen. Just have a look. Of the boards delivered, at least 2 does not work. Gave up on these after that.

Bonjour, Ensemble de 3 fonctionnant correctement, mais demandant une antenne pour augmenter la distance. Pour de plus grandes distances prévoir des récepteurs SeuperHetérodyne

after soldering on a antenna wire of about 20cm's , very clear signal, very little noise. would recommend.

deze zender ontvanger werkt niet, zendt geen signalen uit, jammer, had meer verwacht ! eigenlijk geen ster waard !

Buen producto y funciona sin ningún problema

EXCELLENT