<div dir="auto">Thanks for your reply, Dave.<div dir="auto"><br></div><div dir="auto">ESP32 is a modern affordable microcontroller many developers use for prototyping wireless embedded systems. It can be programmed using C language on Arduino IDE. </div><div dir="auto"><br></div><div dir="auto">If you can access the attached .ino file in previous email, it contains the code for the current prototype. I am using serial bluetooth to communicate with a connected smartphone. I need to send text manually from serial bluetooth app on the smartphone to be converted to braille array on the device. A whole paragraph can be sent at once. ReadRing has 8 programmable buttons to navigate. If attachment does not work in this mail loop, I can paste the code in email if needed.</div><div dir="auto"><br></div><div dir="auto">The problem is I do not know what kind of Bluetooth string is sent from screen readers to such braille displays in general to display any language. If I see a sample code, I can learn and adapt from there.</div><div dir="auto"><br></div><div dir="auto">There is one prototype being kept with Brian MacDonald at National Braille Press in case you want to have a hand on it.</div><div dir="auto"><br></div><div dir="auto">Blessings,</div><div dir="auto">Song</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Sep 19, 2021, 10:46 Dave Mielke <<a href="mailto:Dave@mielke.cc">Dave@mielke.cc</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">[quoted lines by Songpakorn Punongong on 2021/09/18 at 09:51 +0700]<br>
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>I need help in developing a bluetooth braille display based on ESP32.<br>
<br>
What's ESP32?<br>
<br>
>I want it to communicate like other braille displays. Please help me find example codes for bluetooth/BLE braille displays.<br>
<br>
Are you wanting to have a brltty driver for it? If so, Bluetooth serial (i.e. using an RFCOMM channel) is fine. That, in fact, is how most manufacturers do it.<br>
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Have you already designed the (serial) protocol that you'd like to use?<br>
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-- <br>
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