WiFi Dev Board for the Flipper Zero

Marauder - WiFi Dev Board Firmware

The WiFi dev board module for the Flipper Zero comes with the Blackmagic firmware by default.

Changed baud rate to 921600.

Serial USB Terminal (Android App) will allow you to interface with the command line.

Making your own Sub-GHz C1101 Dev Board

Antenna looks to be a full wave whip antenna (~69cm) which will give an increase in signal gain.

However you'd get better results with that, a 1/4 or 1/2 wave antenna (more compact, less conspicuous) and an external amplifier.

One tuned to 433MHz and bidirectional ideally. Airbuddy make those.

If you can solder and have a soldering station you can make one for under $20, get some right angle pin headers, some basic prototyping board, a CC1101 dev board, a 5V to 3.3V low dropout (LDO) regulator, and antenna and an old, broken USB cable to cannibalise thin (sheathed) copper wires from.

Optional airbuddy amplifier or other tuned, bidirectional amp.

If you can't solder, get a soldering station and learn to solder, just buy a bunch of cheap through hole soldering projects and make them.

Soldering is easy to learn for simple things.

All CC1101 boards from me last checking are 433MHz tuned other than the rabbit labs 900MHz one.

The flipper has a wide frequency range due to it having radio switches as part of the internal radio circuit.