04/24/25 - FYI, Morse Chat is now patched to handle more than two users effectively. It also draws random images from the database while you chat. To be completed, proper fart tone and layered transmit.
Zach: I use this hand mic for my PTT networks. It's solid but the PTT signal logic is not what most software expects and cuts down android compatibility unless programmed around.
MrRoboto: I was under the impression that these only work with Retevis radios. Is this not the case? I'd love to be able to use my handmic with other things. I attempted to use mine for Zello with no luck.
Zach: Retevis advertises these HN001 (May be the wrong number) as being 'universal' but the problem is that the key events it sends are very non standard. Zello 'kind of' supports them but treats the two codes it sends on push down and let off each as a ptt press. 'Media Juggle' events have been phased out of most BT event libraries for most apps. The Retevis radios handle them perfectly (with the exception of their newest HT but it's OK). I had to pretty much write an Android service that disregards the let off event. The problem is it juggles the two codes (FF, RW) randomly so my service counts every press from the start of the app to determine press downs and let ups. My app has a 90% accuracy and I've only had a few fake key downs. I will post more in depth somewhere, it's all part of a much bigger software project for my company.
MrRoboto: Wow ok! It sounds like you have done a lot of digging into this. I never really thought about how they work but really do like the use of a mic for things other than my HT. So if you don't mind me asking what exactly you are doing, you mention your 'software project' and I'm curiously if it is HAM related or what.
Zach: It's nothing fancy other than being an android mumble client that runs as a service specifically to (for lack of a better term) mount the Retevis handheld specifically and run in the background, much like a traditional phone carrier ptt service. It will run in the background waiting for the handset, when connected, it then connects to mumble and negotiates keydowns. It's designed to be a no fuss client that correctly uses the handset and connects to a server that is relatively easy for me to connect to other things on the backend (using a management console). So far I've got it all partially working and what I'm left with is a mic I can just turn on and start talking on provided I'm near my phone with no other fiddling or intervention. It's like Zello minus the UI
MrRoboto: NGL, that sounds pretty sweet, kind of blurring the lines between secure coms and radio. Are you going to publish it on github or something when you are done? Are you and the rest of the users here affiliated with any formal groups, how'd this all spring up??
Zach: I am not sure I will post the source, it's not based on another project and I will most likely use it for a commercial solution down the road. I have no memberships or affiliations anywhere, just a tinkerer and web host.
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