Timeline for Using GPIO between two radio programs
Current License: CC BY-SA 4.0
13 events
| when toggle format | what | by | license | comment | |
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| May 30, 2019 at 5:05 | history | edited | tlfong01 | CC BY-SA 4.0 |
recommended gpio pint to OP.
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| May 30, 2019 at 4:15 | history | edited | tlfong01 | CC BY-SA 4.0 |
recommend OP to use logical level converter
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| May 29, 2019 at 11:34 | history | edited | tlfong01 | CC BY-SA 4.0 |
added COS/PTT pins signal analysis.
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| May 29, 2019 at 7:44 | comment | added | tlfong01 | I skimmed through some PTT (Push to Talk) and COS (Carrier Operated Swttch), and now have clear picture of what is going on. Actually "PTT = 12 COS = 16" confused me in the beginning, because it is short for "PTT (pin/signal）= #12，and COS pin/signal) = #16. Very likely it is something like output signal from transceiver #1 triggers input signal to transceiver #2. Or more specifically GPIO pin 1 goes low sets GPIO pin high, and GPIO pin 4 goes low triggers GPIO pin high. There can be two separate programs to run indepentently, or one program looping two functions. | |
| May 29, 2019 at 7:37 | history | edited | tlfong01 | CC BY-SA 4.0 |
added COS notes
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| May 29, 2019 at 7:15 | history | edited | tlfong01 | CC BY-SA 4.0 |
added network radio video link
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| May 29, 2019 at 6:30 | history | edited | tlfong01 | CC BY-SA 4.0 |
added ham radio newbie intro notes
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| May 29, 2019 at 6:20 | history | edited | tlfong01 | CC BY-SA 4.0 |
added reference to dmr
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| May 29, 2019 at 6:14 | comment | added | tlfong01 | Really? I am interested to know where I have misunderstood. Perhaps I should get a second hand transceiver from eBay to learn to try to understand where I misunderstand, and then come back to answer this question I misunderstand. | |
| May 29, 2019 at 5:00 | comment | added | Sonic | mmm thanks way off track but anyways.. Ignore this question.. | |
| May 29, 2019 at 4:47 | comment | added | tlfong01 | @jsotola Thank you very much for your upvote. My "answer" is not yet an answer, because I need the OP's confirmation that I have not misunderstood anything, and my modification of his question is more or less OK, before I can move on to give the real answer. What I have been writing is sort of memoir to convenience myself and visitors that I should be able to suggest an answer. And even eventually I could not provide a real answer, I hope other visitors might help towards a better answer. | |
| May 29, 2019 at 4:33 | comment | added | jsotola | i don't know if that is an answer to the question, but i'm giving you an upvote for the passion | |
| May 29, 2019 at 3:39 | history | answered | tlfong01 | CC BY-SA 4.0 |