433Mhz RX for Raspberry Pi

[jbocreative]

Hi all

I am planning to use OpenPlotter with Pypilot on a Sormiou29

I have not yet found a way to have a RF 433Mhz receiver for Pypilot remote

So far my setup will be :

• Waveshare - CM4-to-Pi4-Adapter - CM4 To Pi 4B Adapter for Raspberry Pi, Alternative Solution for Raspberry Pi 4B, CM4 optional
  
• Raspberry - CM4 - Raspberry Pi Compute Module 4, wireless, 4go
  
• Pimoroni - PIM448 - ICM20948 9DoF Motion Sensor Breakout
  
• Waveshare - USB-CAN-A - USB to CAN Adapter Model A, STM32 Chip Solution, Multiple Working modes, Multi-system Compatible
  
• DFRobot - TEL0138 - USB GPS Receiver with 2m Extension Cable (Compatible with Raspberry Pi/ LattePanda/ Jetson Nano)
  
• Simrad - RS40-B - RS40 VHF Radio with AIS Fixed-mount DSC VHF Radio with integrated AIS receiver, GPS, and wireless handset support.
  

I have read at different places that RXB6 type 433Mhz receiver where not the best idea and that a dedicated proc was needed.

So what would you suggest ?

• SPI → RFM69HCW
  
• UART → HC-12
  
• USB → YardStick One, RTL-SDR
  
  

Regards

Julien

[seandepagnier]

probably can decode with rtl-sdr, but it would use a lot of power.

Why not use the atmega328 on the pi pins? The source code to do everything is already included in pypilot.

[jbocreative]

Why not use the atmega328 on the pi pins?  The source code to do everything is already included in pypilot.

Hi Sean

I haven't been able to find any commercial ATmega328 RF modules with good Raspberry Pi integration.
Perhaps I'm not searching for the right product or terminology...
What hardware would you suggest then ?

[seandepagnier]

it is just an atmega328 wired to the spi pins of the raspberry pi, nothing special

there is a superheterodyne receiver on the atmega328

[jbocreative]

Hi Sean,

I understand your advice now.
If I want to avoid building a custom board, nor have loose wires, could I use the following hardware ?

Rasberry Py
< SPI >
ATmega328 Arduino Nano > https://store.arduino.cc/products/arduin...a3ecc287de
433Mhz Receiver Shield > https://store.ncd.io/product/key-fob-rec...uino-nano/

Regards

Julien

[Sailoog]

I have used these forks for Raspberry pi 5 to make work 433mhz cheap devices:

https://github.com/JoelKle/rpi-rf
https://github.com/OdoctorG/rpi-rf-5

One of them worked but I can not remember which one. If you make that work then openplotter will be ready to manage pypilot:

https://openplotter.readthedocs.io/lates...pio-button

[jbocreative]

https://openplotter.readthedocs.io/lates...pio-button

Thanks for sharing the link! It opens up new possibilities that are much more aligned with my electronic skills.

Despite your helpful explanations, 433Mhz RX seems more complex than I am prepared for at the moment.

Instead and knowing the cons, I'll explore using using some waterproof bluetooth media remote to keep my system "hardware simple" for now.

Regards,
Julien