today we will build walkie-talkies with
a huge
range using a raspberry pi zero cool
stuff
let's start and build one or two of them
by the way
they can also connect to smartphones and
pcs
if you stick around till the end we will
create our own clubhouse clone
using this technology only on
invitation and only for the first row of
course
gritsy youtubers here is the guy with
the swiss accent
with a new episode and fresh ideas
around sensors and microcontrollers
remember if you subscribe you will
always sit in the first
row if you are an online gamer you
probably heard of
mumble we will build walkie-talkies that
connect to this
service as said this gives them an
extremely long range
because they are based on wifi
so what do we need a raspberry zero w
or any other pie a respeaker
mic hat this cool device can also be
used for other stuff
like a faked alexa a loudspeaker or
earphones
code written in go by daniel code
an sd image compiled by me for a quick
start a 3d printed housing
this is of course optional a power bank
if you want to get it portable
a mumble server either your own or a
publicly available one
this project heavily depends on the work
done by ben lewis
and for the case on paul van gaan's
design let's start with the respeaker
hat
it seems to be from seed studio but you
get it also from other sources
it has the same form factor as a pi zero
and contains a lot of useful stuff
its main component is a wm8960 chip
that connects the two microphones to the
raspberry pi
it also has two sound outputs one for
headphones
and one for a one watt loudspeaker
what do we need more for our sound
projects
besides that it offers three leds which
will show the status of our
walkie-talkie
and a button that will serve as our
push-to-talk
or ptt button so the hardware is ready
where do we get the software from
because it's not easy to install the
needed software
i created a ready-made image of an sd
card
you can download this file and store it
on an sd card
using a raspberry pi imager or another
tool
it is around 8 gigabyte and you should
not have
any problems if your card is bigger by
the way
if you want to install your device from
scratch you find the link
in the description before you insert the
sd card in your pi
you should add a wpa supplicant
file to your sd card and change your
wi-fi credentials
you also have to add an empty file
called ssh
if you do not want to connect the
monitor and the keyboard to your pi
here is a small trick i stored these two
files on my pc's desktop
and just copy them to all the sd cards i
create for my pi projects
like that i always have a working wi-fi
and ssh connection
to my newly built pis if you boot your
pi
with a newly created sd card you should
find its ip address
using advanced ipscanner its hostname is
walkiepie if you wait long enough you
can also connect to it
using walkiepie.local instead of its ip
address
i kept the standard credentials pi and
raspberry
the first step after login is to change
the hostname
and other settings if needed how can we
test
that the hardware and the setup worked
connect a headphone
and type these commands now you should
hear
the sound of the microphones in your
earphones
please use headphones and not a
loudspeaker for that test
if you are satisfied you can stop it
with ctrl c
but this is no walkie-talkie we need at
least
two of them connected together so what
is the next
step you're lucky a mobile client
should already run on your pie but what
is mumble
mumble is a free open source low latency
voice chat
application mainly used by gamers
it consists of servers and clients as
said your mumble client should already
run on your raspberry pi and should be
connected
to this free mumble server i created for
you
its address consists of a server name a
column
and a port number if everything is
correct
especially your wi-fi credentials in the
wpa
supplicant file the red and the green
led should be on because your
walkie-talkie is connected to the server
if you download a mobile client to your
smartphone or pc
and connect it to the same server you
can test
your newly built device walkiepie
connected and enter
channel you should see your
walkie-talkie
with the name walkie-pie on your
smartphone or pc
and if you press the button on the hat
you should see the blue led
and hear your voice in the mambo client
one
two three test one two three
test or acoustic feedback if your pi
is too close to your loudspeakers maybe
you already meet other viewers
also testing their device in this room
if you sit in the first row
and watch this video timely you even
might find
me in the room and we can have a chat
but before we start chatting you should
ssh into your raspberry using putty
and change the name of your device in
this
file reload and restart the service
and now you are connected to mumble with
a new name
if two devices use the same name on the
same server
they are always connected and
disconnected that is why you have to
change the name as soon as possible
you can stay with this server but of
course everybody else in the same room
can listen to your conversations
if this is not what you want you have to
create a private server
on imamble or any other public platform
or if you want to use it as an
interphone in your home
you probably want to install a mumble
server on one of your raspberries behind
your firewall
i also left a write-up in the
description on how to install such a
server
if you want to use another server do not
forget to change the server address
in this file of course you can also
connect your smartphone or pc
to your private server if you want
that's it
we built cool walkie-talkies with a
global range
for a few dollars unfortunately
they do not work far away from your wifi
unless you use a trick you can create a
hotspot with the same credentials
as the home network on your smartphone
then your walkie-talkies also work
outside the house
even cooler by the way audio quality is
relatively high compared with other
walkie-talkies
in the end you can put everything into
such a case
because i did not have such nice
loudspeakers with a case
i printed one like that everything
snuckly fits
and is held together with only one screw
if you want it portable you can add a
power bank
and maybe somebody creates a nice 3d
printed case
to include a battery like that one and a
boost converter for the 5 volts needed
by the pi
such a 950 milliampere battery should
last for a few hours
if this is not enough just add a bigger
one
do you remember i promised something
bigger
i promised a clubhouse clone clubhouse
is the new
social media service where people can
meet around the topic and discuss it
if you share your server address
including the hot topic you want to
discuss
with others in the comments we will have
a
clubhouse clone on invitation only of
course
it is even more exclusive only viewers
of this video who stuck till the end
will know
it exists here you soon on the swiss
guys clubhouse clone
maybe we should call it chalet
as always you find the relevant links in
the description
i hope this video was useful or at least
interesting for you
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thank you bye