RF433 example doesn't work

[James-P-D]

Describe the bug

Hi, I'm trying to use the example for RF433R/T units from here: https://github.com/m5stack/M5Stack/blob/master/examples/Unit/RF433/RF433.ino

In the video for the RF433 units ( https://www.youtube.com/watch?v=ZURDsys2aMI ) we see two M5Core devices, one with the receiver unit, and one with the transmitter, and pressing buttons on the transmitter device doesn't do anything.

I'm correctly #defineing RF433RX on one device, and not the other, and the code compiles and uploads without error. But I don't see any traffic when I check the serial on the receiver device, and I'm not seeing any data when I check the 433MHz range on my SDR.

I'm sure both units are working correctly because if I plug them into other M5Stack devices like the M5StickCPlus2 and flash various firmwares, they do send and receive RF signals.

Is the example just broken?

To reproduce

1. In Arduino IDE paste the code from https://github.com/m5stack/M5Stack/blob/master/examples/Unit/RF433/RF433.ino
2. Plug in one M5Core device and note the port number
3. Set the port number correctly, and set the Board type correctly
4. Flash the firmware
5. Comment out the '#define RF433RX' line
6. Insert next M5Core device and repeat steps 3 & 4 to flash to second device

Expected behavior

Try pressing A button on transmitter device. Nothing happens. Nothing appears on receiver device, nothing seen over serial for either device, and nothing appears in spectrum analyser when looking at 433MHz range.

Screenshots

Very short video of it not working here: https://imgur.com/a/mcsAZFT

Environment

• OS: Windows 10
• IDE &IDE Version: 1.8.19
• Repository Version: Repo doesn't appear to have a version. Just using latest version from https://github.com/m5stack/M5Stack/blob/master/examples/Unit/RF433/RF433.ino which apparently was last updated 2 years ago.

Additional context

No response

Issue checklist

• I searched for previous reports in the issue tracker
• My report contains all necessary details