A lil example using the UART gem to send and receive messages from a Flipper Zero

flipper_cli_wrapper.rb

require 'uart'

# find your flipper zero device handle: https://docs.flipper.net/development/cli#rnDLl
fname = ARGV.shift # provide the path to your flipper zero
raise "Please specify a device to open" if fname.nil?
raise "Couldn't find #{fname}" unless File.exist?(fname)

# open the flipper and specify the correct baud
UART.open fname, 115200 do |flipper|
    # read & print the Flipper Zero terminal art
    puts flipper.read

    # input command, or "help" if no command is supplied
    message = ARGV.join(" ") || "help"
    flipper.write "#{message}\r\n" # flipper cli uses \r\n to terminate lines.
    # read & print message output
    puts flipper.read
end