> The ESP only has a 12 bit ADC and an 8 bit ADC.
12-bit dual ADC and 8-bit DAC. And I have not tested the ADC speed. Might
be good enough to do Codec2, but since the ESP32 has a DMA interface for
codec chips, it's easy to connect one.
On Sat, Apr 7, 2018 at 1:41 PM, Bruce Perens <[email protected]> wrote:
> Cool videos by Thai ham HS5TQA. https://www.youtube.com/user/HS5TQA
> I would assume he is using only one of the two cores, and still gets
> decode speed that looks just fine. For what that processor costs, I'm not
> sure we *need* anything slower.
>
> I have the ESP32 running the server I wrote for Algoram Whitebox, and thus
> you can connect to it with your phone, tablet, or laptop and control it
> using any HTML5 browser, using the phone mike and speaker. Or control your
> rig from anywhere in the world. It is simultaneously a WiFi AP and client.
> I've not touched the Bluetooth code, but you can do that too. Pretty good
> for $5 ready to plug into your breadboard and $3.80 for the *module *(not
> just a chip) single quantity. I am using the native programming interface
> rather than the Arduino one. But for people who have an Arduino code base,
> you can port it ESP32 and have the network connectivity.
>
> The ESP only has a 12 bit ADC and an 8 bit ADC. But a 24-bit stereo codec
> chip is only a few bucks. So, you can make a pretty cheap box to remote
> control your rig and run the codec or DSP software of your choice. The
> ESP32-WROOM version has about half a megabyte of RAM and 4 MB FLASH, the
> ESP32-WROVER ads another 4 MB RAM and still costs about $5 for the module.
>
> Because of its network connectivity, low cost, and ease of building around
> a module that is already a working computer, it could blow SM1000 out of
> the water. And it's got two cores, a real OS, touch sensors so you can
> build a keyer out of a piece of double-sided PCB, various hardware
> accelerators, and other sorts of I/O. There is also an ultra-low-power
> processor that can wake up the main CPU, so it can do audio squelch with
> low power drain, etc.
>
> The low-level WiFi and Bluetooth code is proprietary, and the
> WiFi/Bluetooth radio is an SDR that is just begging to be reverse
> engineered, but all high-level code is taken from existing Open Source
> projects.
>
> It's so convenient to put one of those modules on a hardware project and
> then talk to the project with your web browser.
>
> Thanks
>
> Bruce
>
> On Sat, Apr 7, 2018 at 6:31 AM, tom sparks <[email protected]>
> wrote:
>
>> I am wondering what is the slowest CPU that can decode codec2 in
>> real-time?
>>
>> I saw a video on youtube of somebody using a ESP32 to decode codec2
>>
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