025 We use Baofeng's "heart" for Our Projects (SA818, DRA818)
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Жыл бұрынMost of us own a Baofeng. It is cheap and does the job. What would you say if we could transplant its “heart” and combine it with a Raspberry Pi or an ESP32? We would get a dirt cheap and compact device for all sorts of analog and digital modes.
Links:
SA818: s.click.aliexpress.com/e/_DCp... ((write VHF/UHF in order))
SA828 Walkie-Talkie on aboard: s.click.aliexpress.com/e/_DCp...
SA868 2W: s.click.aliexpress.com/e/_Dep... (write VHF/UHF in order)
RT85 Handheld: s.click.aliexpress.com/e/_DDg...
Used Board: github.com/digixx/VHF-UHF-Mod...
RDA1846S datasheet: bit.ly/3tscO6A
Build-a-Pi: github.com/km4ack/pi-build
OH2LAK: oh2lak.blogspot.com/2017/06/e...
HamVoip: hamvoip.org/hamradio/818_tran...
SA818 software: 0x9900.com/programming-the-ra...
AT commands: f4hok.wordpress.com/2020/03/1...
Arduino Library: github.com/darkbyte-ru/SA818
MAX9814 datasheet: datasheets.maximintegrated.co...
Shari project: kitsforhams.com/shari
Shari Hotspot knock-off: s.click.aliexpress.com/e/_Dkx...
SA818 Datasheet: dmr.md/upload/uploads/SA818-1...
DireWolf/Xastier intro: • Direwolf - From the be...
Voltlog's SA818 hat: • Get Almost Unlimited R...
Filter Datasheet: www.minicircuits.com/pdfs/LFC...
The links above usually are affiliate links that support the channel (no additional cost for you).
GitHub: www.github.com/sensorsiot
My Patreon Page: / andreasspiess
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@jancornelis7218 Жыл бұрын
Last April (2022) we used this SA818 on a Raspberry Pi Hat in a weatherballoon we launched in collaboration with a local school. The HAT also had a GPS and soundcard so it could send back sensor data, APRS and sstv during flight. The HAT was specificly created for this purpose and software control was a combination of Direwolf and python scripting.
@HB9BLA Жыл бұрын
Nice project! And more advanced than mine.
@poorin5788 Жыл бұрын
Let me see pls.
@jancornelis7218 Жыл бұрын
@@poorin5788 kzfaq.info/get/bejne/pKqddcZ_vKypYYU.html
@andykirby Жыл бұрын
Oh wow!!!, this comes at the perfect time when some of us are getting back into packet radio (not APRS, proper packet chat and BBS')
@HB9BLA Жыл бұрын
Cool!
@mahudson3547 Жыл бұрын
We just got back from a trip to Ireland and visits to Valentia - the first transatlantic cable and Clifden - Marconi transatlantic station, complete with condenser building (90 metres long)! The excitement today of establishing a working wireless link is still intoxicating. Imagine what those two stations experienced. Pioneering history. Nice video as always
@HB9BLA Жыл бұрын
I was there, too during our Ireland trip a few years ago. Indeed, for them it must have been exiting to hear such signals which are given for us today.
@yossik32 Жыл бұрын
This is absolutely amazing. I remember back in the 80's doing RF electronics was very complicated with lots of math and circuit design expertise needed. Today things changed drastically. Building complex electronics projects feels like playing with "LEGO". Everything connects to everything by SPI or I2C and you get the job done quickly. I learned a lot from your great video !
@HB9BLA Жыл бұрын
RF Know-how still is needed, particularly if something doesn’t work;-) But I agree: We live in a wonderful electronics world.
@SchwaAlien Жыл бұрын
It all comes down to the projects dedicated to making open source hardware and software for the community, Arduino really put it in motion and obviously much has advanced since then, but a lot of the standards for the components came from that project and appear to be solid.
@drTERRRORRR Жыл бұрын
Brother, you blew my mind again! Your channels are treasure in YT "content sludge". Thank you.
@HB9BLA Жыл бұрын
You are welcome!
@PropaneTreeFiddy Жыл бұрын
my previous DIY radio project involved interfacing the Kenwood connector on my UV5s. This is a game changer - thanks for sharing!
@HB9BLA Жыл бұрын
You are welcome!
@guatagel2454 Жыл бұрын
Thank you, Andreas! As usual, I don't need this right now. So, your video appear for me in the perfect moment. In the future, when I need something like this, your video is right here. Thank you!
@HB9BLA Жыл бұрын
You are welcome!
@GarryNichols Жыл бұрын
I was surprised to see the face of the guy with the Swiss accent on a different channel. Instantly subscribed. nice.
@HB9BLA Жыл бұрын
Welcome aboard the channel!
@stewartrv Жыл бұрын
Great video. I'd love to see a ESP32 use Bluetooth to connect to an Android phone app. We could use it as an interface or send data direct. The module would simply have are the RF stuff in it, plus a battery etc.
@HB9BLA Жыл бұрын
Then somebody has to write the TNC sofrware…
@manyshnooks Жыл бұрын
You could connect via WiFi and do the DSP on the Android phone...
@stewartrv Жыл бұрын
@@HB9BLA The KissTNC runs on Arduino and is open source, maybe porting it is doable I don't know...
@user-zs8eg4mu8t 11 ай бұрын
Reticulum?
@ChrisK9EQ Жыл бұрын
A note about the low pass filters. The Baofeng-style radios use the antenna for the low pass filter. Some regulations require harmonics measured at the transmitter while others use the transmitted signal. The latter are generally associated with inexpensive radios where the antennas cannot be removed. The higher the Q of the antenna the better - for more than one reason! 73, Chris K9EQ
@HB9BLA Жыл бұрын
Maybe, I never made such measurements. But most antennas I tested had resonances at the harmonics, too. And the Baofengs have connectors. So the regulator here will measure there.
@atomikrobot300099 Жыл бұрын
Very nice. A friend of mine has an open source project that uses a CM108. The small PCB has some support circuitry to break out the audio in/out and CM108 GPIO (exposed on the SMD version of the CM108) for interfacing a radio. I love that Direwolf can control the CM108 GPIO for PTT out of the box. I've been using his project now for 3 years and it works great for Direwolf + Pat on a Pi 3. We've also experimented with the NinoTNC for 9600 VHF packet via Direwolf. I've seen a few others build hats exactly as you describe. I'll have to find that project and send it to you.
@HB9BLA Жыл бұрын
I found one from 2012. but not in the Pi zero form factor…
@seanyem Жыл бұрын
Awesome! This is a great video, So many cool projects could be made with these modules.
@HB9BLA Жыл бұрын
I agree. Just started one with two modules for satellite work…
@12012004 Жыл бұрын
Thank you for a such well documented video!!!
@HB9BLA Жыл бұрын
Glad you enjoyed it!
@Eduardo-hu1ki Жыл бұрын
Thank you, it helped me to solve doubts that I had about the module. A greeting.
@HB9BLA Жыл бұрын
Glad the video was helpful
@Chris-ZL Жыл бұрын
Nice to see Charlie's work
@HB9BLA Жыл бұрын
I like his channel!
@Real_Tim_S 5 ай бұрын
What you want is an I2S stereo CODEC talking to the RPI or ESP32. Split the stereo to L = LocalAudio, R = RadioAudio - with the individual channels optimized. If you want more radio modules, they make 4-channel I2S codec that only needs the single I2S data-lane (2x16-bit split audio channels per 32-bit I2S channel period). That would still work with a minimal ESP32, and would give you another 2x radio slots for 3x total radios and a local mic/speaker.
@HB9BLA 4 ай бұрын
Good idea!
@alexmiller9198 Жыл бұрын
I like your voice, your accent and your self humor. Gruezi!
@HB9BLA Жыл бұрын
:-)
@_5bit_ Жыл бұрын
oh man this would be SICK if we could get a mini vhf/uhf pi hat to do digital modes and other stuff
@HB9BLA Жыл бұрын
I am confident that it will work…
@Jackaoz Жыл бұрын
Certainly something that would be very useful. VK2DU
@Skhillz_FN Жыл бұрын
@@HB9BLA ok but series of chips/dev boards can i look at to stuff a cell signal into a steam deck?
@johntetreault Жыл бұрын
I just finished my gerber file for an SA868-V (2 watt version of the 818) with a built in sound card in a pi hat format. Im probably going to send out for manufacturing about 10 or 20 for a first prototype run next month.
@williamhowell1791 Жыл бұрын
@@johntetreault have you done his yet and are they available?
@maciej.wolosewicz Жыл бұрын
Brilliant! Thanks for such a great movie and info.
@HB9BLA Жыл бұрын
Glad you enjoyed it!
@mewintle Жыл бұрын
Amazing, as always!
@HB9BLA Жыл бұрын
Thank you!
@SchwaAlien Жыл бұрын
FRS is a public walkie talkie frequency that cheap consumer units use, people get them for camping and convoys, at least in North America.
@HB9BLA Жыл бұрын
You are right.
@mcconkeyb Жыл бұрын
Interesting stuff. I could do a PCB design, but I won't be able to start until January. I'm sure someone will have it done by then, but if not then let me know and we can design the hat you need. 🙂
@HB9BLA Жыл бұрын
Thank you. I found somebody who wants to do the job. Let’s hope we have a prototype till January. Otherwise I will come back.
@johntetreault Жыл бұрын
@@HB9BLA just finished the gerber file for SA868-V with i2s sound card on a pi hat. No kludgy usb wires, all going through pi gpio... Sending off to manufacturing shortly.
@HB9BLA Жыл бұрын
@@johntetreault Cool! Is it for the "normal Pi or for the Zero? We head for the Zero because we do not need too much power and memory for the applications in focus.
@johntetreault Жыл бұрын
@@HB9BLA its regular pi hat form factor (only way to fit everything on the board) but it will work equally well on either a regular pi or the zero since theyre same gpio pinout
@jancornelis7218 Жыл бұрын
@@johntetreault I'm curious what I2S chip you used. The WM8731 we could source turned out to be a fake.
@josequinton6940 Жыл бұрын
Thinking about getting back into HAM radio and I was surprised at the pricing of htese HT's and the secret is SDR SA818 etc thank you for the excellent video ......now my mind is really going bezerk with all the diferent directions one can take {KISS a tech license and starter Boafeng... back to focus}.
@HB9BLA Жыл бұрын
Indeed, the possibilities in HAM radio increased and the prices came down...
@illiteratebeef Жыл бұрын
Very excited for a winlink video, it sounds really cool but I haven't found any good explanation/setup videos.
@HB9BLA Жыл бұрын
We will see how far I will come…
@tseckwr3783 Жыл бұрын
thanks again for another informative video.
@HB9BLA Жыл бұрын
You are welcome!
@theunfrailhale Жыл бұрын
Hey, its that Swiss guy tearing apart radios! Nice!
@HB9BLA Жыл бұрын
Actually, you do not need to tear your radio apart. You can buy these modules separately.
@chuxxsss Жыл бұрын
Morning Andy, good show mate.
@HB9BLA Жыл бұрын
Thank you!
@jmr Жыл бұрын
Excellent video! KM4ACK is definitely a busy guy! Nice stuff!
@HB9BLA Жыл бұрын
Thank you!
@BabylonLurker Жыл бұрын
I have a few of those modules (DR818 VHF and UHF modules), and have been looking a bit at finding info for programming them. Bingo, and thanks Andreras. OZ9QV, Jan.
@HB9BLA Жыл бұрын
So you can go ahead with your projects ;-)
@skinnyflea2628 Жыл бұрын
This was really interesting! I may have to give this a try. It would be cool to run a winlink node but I am not sure that would be possible.
@HB9BLA Жыл бұрын
It should be possible. The question is the speed.
@daveys Жыл бұрын
I immediately love this video
@HB9BLA Жыл бұрын
Very good!
@PhG1961 Жыл бұрын
Excellent ! Btw, next week, in Köln is the PMRExpo... plenty of Baofengs and many more to discover !
@HB9BLA Жыл бұрын
I do not think you will find a lot of Baofengs in Germany. They are forbidden there. But for sure other nice stuff!
@PhG1961 Жыл бұрын
@@HB9BLA It's been from before the pandemic that I've been there. So, in 2019. At that time there were many. Maybe they got prohibited afterwards or they have other models that are legal. I'll have a look next week ;-)
@TallTexasGMan 4 ай бұрын
Very neat, stumbled upon this while looking at options to build some new Fox Transmitters. I want to broadcast recorded voice audio rather than what sounds like musical tones. Have more fun taunting people. :)
@HB9BLA 4 ай бұрын
Go for it!
@DerekMurawsky 9 ай бұрын
Very cool project... I'd love to see an esp32 based igate/digipeter using this for APRS. Who needs a pi? 😆
@HB9BLA 9 ай бұрын
Thank you. This was one of the applications. BTW: We already use the ESP32 for LoRa APRS on 70cm...
@DerekMurawsky 9 ай бұрын
@@HB9BLA I more meant "real" (interoperable) APRS on 2m, not LoRa. I'd love to see an esp32/sa818 open source combo board to allow for both simple and inexpensive digipeter and igate setups.
@kd9kck376 Жыл бұрын
I designed an ESP32 controlled repeater around the SA818 modules that can fit in an Altiods tin. (At least once I get it made.) I also found that my SA818's meant for 70cm respond and work properly even when setting the freq to be in 2m. So not sure whats up with that.
@HB9BLA Жыл бұрын
1. I am interested in your ESP code. Is it documented? 2. Another viewer reported all that they work on both bands.
@amundsen575 Жыл бұрын
I am a boat owner and these radios work great for marine vhf band - not impervious to salt water, take that with a grain of salt!
@scottbradford192 Жыл бұрын
If it was set to single band mode operation only, could you cover it in potting to weatherproof it?
@amundsen575 Жыл бұрын
i keep it in the cabin the steel parts rust, when it fails i will buy another, been going for about 4 yrs now
@jessihawkins9116 Жыл бұрын
That is illegal. You need to be using FCC typeset radios. I’m telling.
@weirdsciencetv4999 Жыл бұрын
Also, I love you channel! If you’re looking for video suggestions, I would love to see a FRS radio implemented in GNURADIO. I tried myself and it does work, but for some reason my generated CTCSS tone has some phase spurs I can’t get rid of using the sine signal source.
@HB9BLA Жыл бұрын
AFAIK FRS is not allowed in Europe.
@weirdsciencetv4999 Жыл бұрын
@@HB9BLA Any similar systems using CTCSS? I think just would be cool to see a NBFM channelized system that implements CTCSS.
@smartassj 2 ай бұрын
Thanks again for yet another amazing video. Do we need a ham radio license to experiment with this?
Жыл бұрын
Very nice ! You look like an expert in electronics, maybe you can help with a long time question on the UV-5R: what is the purpose of the trim potentiometer in the transmit circuit ? If you have the diagram, it's called VR2. I haven't been able to find an answer to that question anywhere...
@HB9BLA Жыл бұрын
I have no idea, I never opened one.
@W4TRI Жыл бұрын
Look at the Nexus DR-x and the Fe-Pi sound cards. Pi Hat for sound in/out
@HB9BLA Жыл бұрын
What I want is not only a sound card. I want a SA818 on it, too ;-)
@cptcrogge Жыл бұрын
I wish the Baofeng would support API calls from a PC out of the box, so you could control the device easily to grab data from certain frequencies.
@HB9BLA Жыл бұрын
They use the microphone and loudspeaker connectors for data communication:-(
@jamesdinsmore9022 Жыл бұрын
Thanks!
@HB9BLA Жыл бұрын
You are welcome!
@pacorrodelgadillo8429 Жыл бұрын
Awesome!
@HB9BLA Жыл бұрын
Thank you!
@turbo2ltr Жыл бұрын
I have 4 of those modules here waiting for me to do something with them. I set up a cheap DVR with audio inputs and some HTs as a way to continually record the repeaters we own in case there are technical issues, or people issues. I wanted to make a carrier board for 4 modules that would allow 4 discrete frequencies to be received and sent to the DVR instead of having 4 HTs in chargers. I'm willing to pay someone to design this if interested.
@HB9BLA Жыл бұрын
One of my viewers does a PCB with 2 boards. Mainly for 70/2m satelite work. Maybe this one could be used…
@ff1077 Жыл бұрын
Wonder if it would be possible to encrypt and decrypt incoming signals through the Pi before input and output respectively.
@HB9BLA Жыл бұрын
For HAM radio, encryption is forbidden.
@nutsnproud6932 Жыл бұрын
Thanks for the video. I think I found my winter project. 73 de Tez.
@HB9BLA Жыл бұрын
Cool! Tell us about it when you finished it.
@jordanwosnick Жыл бұрын
It would be very cool to be able to use this simple approach to make an ssb based device for 2 m or 70 cm operation. For example - an easy to build Wspr client. Is such a thing possible with these chips?
@HB9BLA Жыл бұрын
They only do FM
@kestutismaciunas9029 Жыл бұрын
Nice work. Is it possible to reprogram internal DSP for AM or other modulation output?
@HB9BLA Жыл бұрын
I do not think so
@TradieTrev Жыл бұрын
This is some mad hackery!
@HB9BLA Жыл бұрын
Yes.
@macgyver5108 Жыл бұрын
And here allllll this time I've been watching your other channel, yet I had no clue you were an AMATEUR!😛 Sure explains a lot! --... ...-- / -.. . / -.- --... .- . -.-
@HB9BLA Жыл бұрын
I have my license since 1977 ;-)
@macgyver5108 Жыл бұрын
@@HB9BLA since 2019 here... REALLY addicted to building antennas from scratch!
@germanjohn5626 Жыл бұрын
Those modules are already old, we used them 5 years ago and have happily moved on to better chips and modules.
@HB9BLA Жыл бұрын
Which ones do you use now?
@TimCarterPhotos Жыл бұрын
These modules are all FM, yes? Is there an equivalent that is capable of SSB/AFSK for other digital modes? Yes, I'm talking about you FT8 & WSPR.
@HB9BLA Жыл бұрын
I do not think so.
@DavidFindlayQLD Жыл бұрын
The SA818 has an SDR at its core. Has anyone been able to get it out of FM and do SSB or a raw module signal with modulation from a software defined radio on the Pi?
@HB9BLA 11 ай бұрын
I do not think that this is foreseen (no pins with such signals)
@justin6125 11 ай бұрын
let me ask you a question. is it possible to run something like meshtastic through a baofeng to increase the range of mesh nodes?
@HB9BLA 11 ай бұрын
LoRa boards have a longer range than the Baofeng modules.
@ehvway Жыл бұрын
Herr Spiess, as always, another great vid! Great value. Very therapeutic for me (and nothing wrong with your accent : ) Danke schön!
@HB9BLA Жыл бұрын
Thank you!
@EdwardOrnelas Жыл бұрын
New to the radio world! Very minimal experience with raspberry pi and chips in general but would it be possible to add "encryption" to the baofeng or with the digital signal?
@kenwood_9474 Жыл бұрын
Technically yes but not legally in the US or most other amateur radio countries! Here in the US the FCC mandates that any operator must be "able to receive and interpret your signal" so as long as your format is published and can be understood by another ham, you're all good!
@HB9BLA Жыл бұрын
Kenwood is Right.
@SchwaAlien Жыл бұрын
You can encrypt stuff on public bands like LoRa (FRS?) if you aren’t operating as a HAM, the restriction is part of the licensing... so in North America as a HAM you can use the 433 MHz LoRa band (or 915), but it has to be unencrypted, whereas the public may only use 915 MHz, but it can be encrypted.
@vladimirzivadinovic3941 9 ай бұрын
Is it possible to use unfiltered audio with the radio chip for 9600 baud ax.25, m17, vara fm wide, etc. ?
@HB9BLA 9 ай бұрын
These chips do not support 9600 baud :-(
@Zhaymoor Жыл бұрын
I hope you make a video about passive radar, Thabk you for the great videos
@HB9BLA Жыл бұрын
What is passive radar?
@Zhaymoor Жыл бұрын
@@HB9BLA i I know this video is a bit long, but you can skip the part about conventional radar kzfaq.info/get/bejne/oqqEmpml06jaYKM.html
@weirdsciencetv4999 Жыл бұрын
Are you able to access the ADC/DAC of the internal SDR chip directly?
@HB9BLA Жыл бұрын
I do not think so.
@Heptode 8 ай бұрын
Very interesting project. At 10:00 you mention video #419 about working with audio on the ESP32. I can't find that video here or on your other channel. Can you give me a link, please?
@HB9BLA 8 ай бұрын
KZfaq deletes comments with links. Just search with #419 and you find it on my main channel.
@UpinkProduction Жыл бұрын
I love it good
@HB9BLA Жыл бұрын
:-)
@TheSkualo75 Жыл бұрын
Awesome!! I can't find a cheap full duplex headset for my kart sessions... I tried Bluetooth headset, but I need about 300 meters of range... I haven't a deep pockets but I don't know to program chip... Can you help me? Thanks a lot
@HB9BLA Жыл бұрын
Duplex is hard. I cannot help. KZfaq is my hobby
@MrAbrandao Жыл бұрын
I would love to buy this low pass filter and others but can't find them on Ali.
@HB9BLA Жыл бұрын
They are available on Mouser and Digikey.
@DarrenRound Жыл бұрын
I wish there was a 6m / 4m version of the rf modules, I've been trying to find a way to build aa allstar / echolink node on those bands for a long time now... Does anyone know if they exist?
@HB9BLA Жыл бұрын
I do not know.
@KJPage 11 ай бұрын
I contacted the company some years ago and they said they can offer the module for any band requested. Even 10 meters.
@DarrenRound 11 ай бұрын
@KJPage oh really? I never really considered asking them directly, I might reach out and see what they say. I'm a little apprehensive about the minimum order quantity for a specific order though :-) Thanks for your reply!
@cazandoru Жыл бұрын
Hi Andreas, Thank you for the great leaning materials. Regarding this module, is it possible to use it for CW? Just got my very-very-beginner HAM license and I am still not allowed to build my own radio but I am learning for the next license level and, in the meantime, try to get more information. Many thanks!
@HB9BLA Жыл бұрын
It does FM. Without modulation, it creates a stable tone that could be used for CW. But I think, the on-off speed is not fast enough. And the receiver does not "hear" CW
@cazandoru Жыл бұрын
Thank you very much!
@GuyMasong1 8 ай бұрын
Can you just use the SA868 instead of the SA818, for example on the same module board? It looks like the programming manual is the same.
@HB9BLA 8 ай бұрын
AFAIK they are the same.
@Cyklonus Жыл бұрын
👍👍
@michaelbishton9439 Жыл бұрын
Where can I find? ... This looks like a great setup. I am a pilot who is NEW to SDR and am asking for help to find out the best way to connect the voice input received by the device into voice recognition software on the PI using the Python PiAudio library. I want to be able to call the receiver at my grass strip airport to command the PI to read the wind direction and speed from a weather station and broadcast the information back to me. (Airband in North America, the spectrum from 118.000 to 136.975 MHz is used with 25 kHz spacing and AM). Instead of voice comands, I could - lets say - click my aircraft radio transmit button 5 times. The software on the Pi would have to know how to count the transmit clicks. I have no idea how to do that. Any help appreciated. Thanks!
@HB9BLA Жыл бұрын
When I returned to the field in Venice, I had to key the transmitter a few times to swithc on the runway lights... The question is if you need to use your official gear or you can us a different frequency, If you can use a different one, I suggest to look at LoRa (I have some videos about it on my main channel). It offers a data connection on 915MHz ISM (license free) band.
@PauloHenrique-hg7iw Жыл бұрын
And how do you solder the components for yourself?
@HB9BLA Жыл бұрын
Either with a soldering iron or with hot air
@Edward_ZS Жыл бұрын
📻 I want to build a all in one scanner like the HRD-747 but running off a arduino or esp32. Using the sa818 modules I thought it could be a good idea. The goal is fully open sorce radio communications. There are some scanners on the market but I want one that looks and feels like a handheld radio. Or is at least pocket size like the HRD-747. All ideas are welcome. Comment here if you're interested.
@HB9BLA Жыл бұрын
I would use an SDR for a scanner. Much better suited.
@goranjosic Жыл бұрын
What is the range of this project when sending digital signals?!
@HB9BLA Жыл бұрын
Depends on the antenna and location. It has an output of a bit less than 1 watt
@austinwiggins77 Жыл бұрын
Could this be used to build a diy ads-b in/out?
@HB9BLA Жыл бұрын
I do not think so. Wrong frequency
@n8lbv Жыл бұрын
I know I am asking some very old questions that I have not found any answers to yet: 1. is it possible to program the chip to give you raw or unfiltered RX (for 9600 baud packet) nor not? same interest in transmitting higher speed data than 3KHz/1200baud 2. Do these SDR use any kind of a (VHF/UHF)Local Oscillator and IF frequency (internal to the chip) for RX and any idea what it is or how to find it? I was just going to put an antenna and spectrum analyzer near the chip to try and find it. THANKS!
@HB9BLA Жыл бұрын
This chip is an FM transceiver. It is used for low speed packet because it only has the standard voice bandwidth. And I think you find the LO frequency on the xtal pins of the RDA1846 chip inside the module. I assume it is close to the receiving frequency because the DSP wants NF...
@n8lbv Жыл бұрын
@@HB9BLA Thanks for the reply, by LO I mean the RX injection LO not the crystal clock frequency. Assuming there is a mixdown from 460MHz or 150 Mhz before brought down and sent to the SDR. Not sure what you meant by it wanting "NR". Please explain. I don't expect SDR happens directly at 460 or 150 MHz. :) I could be wrong, but not going to go and admit that. Also the RDA1846 is "hardcoded" for low bandwidth voice. It *could* physically do 9600baud or higher bandwidth IF they wanted it to and could have added this to the command set. But they did not. Just like it can do 25KHz FM or 12.5kHz FM RX+TX modes. It could have been given the ability to do wider modes. Limited in software. FM RX mode on (65-108MHz) is programmed or "hardcoded" to make the chip do a much wider RX mode. Could have been done for UHF/VHF to make it higher speed data capable. Fun stuff anyhow. Cool video. Thanks!
@pete3897 Жыл бұрын
5:09 is that a whitespace error there between the S and the 0 ?
@HB9BLA Жыл бұрын
Yes. My mistake.
@johntetreault Жыл бұрын
Look to the AudioInjector Zero.... it is a sound card hat for the pi zero.... I'm using a DRA818 and the AudioInjector Zero for an APRS digipeater
@HB9BLA Жыл бұрын
Thank you for the info. A good solution. Currently, we design a Pi hat with a souncdard chip and a SA/DRA818 to save space...
@johntetreault Жыл бұрын
@@HB9BLA nice. Got a link where one can get that? Does it have band-pass filtering circuitry added? Im running a solar APRS digipeater with the DRA818 module from SV1AFN and the audio injector.... Id love to transition that to something that is combined onto a single pi hat, as it will be less of a rats nest of wires in the outdoor enclosure.
@johntetreault Жыл бұрын
@@HB9BLA the other project im working on is using two of these DRA818/SA818 modules interfaced with a repeater MMDVM board and see if theyre capable of being used to build a portable DMR repeater.
@HB9BLA Жыл бұрын
@@johntetreault It will surely appear on this channel if it is ready...
@HB9BLA Жыл бұрын
@@johntetreault I have an Echolink device with an SA818 HAT on an Orange Pi mini. This board already has a sound car built-in...
@alancabezaparada5175 Жыл бұрын
Do you have something to open vehicles?
@HB9BLA Жыл бұрын
Usually my key ;-)
@edvardfranke Жыл бұрын
Like the disturbing switzer signal
@HB9BLA Жыл бұрын
Thank you!
@kisho2679 Жыл бұрын
are all features of both the "Quansheng UV-K5" and "Baofeng's" legally allowed in Europe and Switzerland (or e.g. do you need special permissions)?
@HB9BLA Жыл бұрын
The Baofengs are forbidden and I fear that the Quansheng will go the same route if they did not add proper filters.
@kisho2679 Жыл бұрын
@@HB9BLA thx
@KnaufL Жыл бұрын
I have had bad experiences with Orange Pi, they tend to die after 1-1.5 years. How are yours?
@srfrg9707 Жыл бұрын
I had 2 working 24/7 (running domoticz). The fist fried within a year but the other one is OK still after 2 years since I under-clocked it a lot till the CPU t° was reasonable and I added a few heat-sinks also (but no fan).
@HB9BLA Жыл бұрын
Mine productively runs for 6 months. But on low load.
@borisvokladski5844 Жыл бұрын
I have a couple (with copper heat sinks) running 24/7 in small junction boxes for outside use for different SDR projects (low CPU usage). They run fine after 3 years in operation. On the other side, I have some other OPIs where the SD card slots broke, or the HDMI connector broke after 12 - 18 months of use (used 1 - 3 times a week).
@MrOpenGL Жыл бұрын
My two orange pi zeros work fine and are 4 years old by now
Жыл бұрын
Mine had a broken SD card reader, they seem to be badly soldered.
@fpaolo63 Жыл бұрын
hi Andreas, QQ, did JLCPCB mount all the parts and SA818 or just Maxim? 73 iu2omt, paolo
@HB9BLA Жыл бұрын
They mounted most of the parts. Not the hand soldered.
@fpaolo63 Жыл бұрын
@@HB9BLA mmm, even if one years elapsed, the price to assembly 5 units was very cheap considering SA818. I paid €22 for the last i bought and €10 at beginning of '22
@HB9BLA Жыл бұрын
@@fpaolo63 The SA818 was hand-soldered and not part of the price.
@yle5788 Жыл бұрын
I have to get my license. I rally want to build a DIY AIS transiver
@HB9BLA Жыл бұрын
Go for it!
@frankhovis Жыл бұрын
0:20 - Small bugger??
@HB9BLA Жыл бұрын
Yes, I think so.
@dave_dennis Жыл бұрын
Andreas, I maybe misunderstood. Are you looking for help to do a raspberry Pi hat PCB? I would love love to help on this if I didn’t misunderstand. I loved this video and I am ready to sink my teeth into it.
@dave_dennis Жыл бұрын
De N5BOC.
@HB9BLA Жыл бұрын
Thank you for you offer. Yes, I would like a Pi zero hat. But I already got help for the moment. Another viewer started already.
@mjoconr Жыл бұрын
What about Codec2 and FreeDV?
@HB9BLA Жыл бұрын
I do not know much about those projects:-(
@mjoconr Жыл бұрын
@@HB9BLA I think you have the basic elements in this hardware to give this digital speak mode a try
@pete3897 Жыл бұрын
@@HB9BLA I thoroughly recommend trying the free and open FreeDV mode and software and have a read up on what Dave Rowe does
@scottbradford192 Жыл бұрын
#1. All in one, bluetooth APRS module. Think of a Mobilinc TNC but with a transmitter built into it already. That way, you just connect your phone or bluetooth tablet (or laptop) to ONE device and go. #2 Self contained, stand alone APRS digipeater/igate. There are a few on the market but they have TERRIBLE software and are very expensive ($200usd and up). Something that is low powered that could be solar powered would take the place of LORA Mesh units that everyone is talking about, but have better range than a few hundred mw on 900mhz. Also, Denis from Digirig was working on a Pi Audio hat. There are many on the market, but have seem to fallen away or are very expensive.
@HB9BLA Жыл бұрын
We get now LoRa APRS. And do not underestimate LoRa. I bridged 200km with a simple 100mW module and a very small antenna. Search for „world record „ on my main channel if you are interested.
@scottbradford192 6 ай бұрын
Someone finally did it. Combined the SA828 with an esp32 and created built in aprs digipeater mode
@milanman2197 Жыл бұрын
Hiii man....🎊🎉🎉🎊🎊🎉🎊🎊🎉is it possible to get any response from security devices like (sensors, CCTV, Alarm system WITHOUT INTERNET CONNECTION and POWER CUT... How could we handle these type of situations...
@HB9BLA Жыл бұрын
I do not think so.
@milanman2197 Жыл бұрын
@@HB9BLA what does it mean...🎉🎊 Not working without internet connection and POWER right....!
@bvodall Жыл бұрын
Are you familiar with SHARI?
@HB9BLA Жыл бұрын
No. I just found the project.
@bvodall Жыл бұрын
@@HB9BLA there is another product based on the 818, I will forward the link when I find it again.
@HB9BLA Жыл бұрын
@@bvodall KZfaq deletes most of the comments with links. A good search term is a better idea...
@tyflos098 Жыл бұрын
Asre you andreaspies?
@HB9BLA Жыл бұрын
Yes
@EasyOne Жыл бұрын
i need code for esp32 😂
@HB9BLA Жыл бұрын
Should not be too difficult. We plan a board with an ESP. But it will take time
@EasyOne Жыл бұрын
@@HB9BLA Thank you, I'm waiting
@RobRoschewsk Жыл бұрын
FYI …. Hamvention presentation of kids that built a balloon based repeater using these modules kzfaq.info/get/bejne/fZqVlKaZrtDPaHk.html
@HB9BLA Жыл бұрын
Thanks. Interesting project. Unfortunately, he never added the HW to github :-(
@2000vitaly Жыл бұрын
There is no callsign HB9BLA on the FCC database. Why is that?
@HB9BLA Жыл бұрын
Because I am Swiss?
@icantseethis 8 ай бұрын
the state of healthcare in this century
@HB9BLA 7 ай бұрын
??
@sergeypischurin6073 Жыл бұрын
Нихрена не понял ,но очень интересно !:)
@pedroset7972 Жыл бұрын
🤣👏👏👏
@ScottWinterringer Жыл бұрын
and this will never be supported ever again..
@HB9BLA Жыл бұрын
I do not understand :-(
@planker Жыл бұрын
As I suspected. As with all Chinese products, a cheap copy of top shelf tech. Possibly even stolen. Filters needed, of course, it did not come from a land of Laws. I bet you could not put your hands on a Motorola class chip for that price. Excellent presentation, the chip is available and should be studied it's a good example.
@HB9BLA Жыл бұрын
I am no lawyer. So I do not know the possession of IP. So I just enjoy the modern possibilities ;-)
@sanjikaneki6226 Жыл бұрын
Andreas how often do you check discord? ill post the things that i found there. ( about kicad)
@TheoBenschop Жыл бұрын
is ok nl5778
@HB9BLA Жыл бұрын
???
@sanjikaneki6226 Жыл бұрын
kicad sure we can talk in your discord
@TonySwitzerland Жыл бұрын
"cheibeguet!" und wunderbar präsentiert. 73 de (ex) HB9BLU. DANKE!
@HB9BLA Жыл бұрын
Vielen Dank! 73 de HB9BLA
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