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I got it working as of last night. I found that I had misidentified the pins (there were 4 of them because it was a ribbon cable with 4 pins) that trigger when I press/depress the hook switch, and I also didn't press the Teensy 4.1 and the Audio Shield together enough, so they weren't making a...

OK, so the phone *is* playing back my greeting, and then recording a message, but only when I physically unplug and then reconnect Pin 0 on the Teensy 4.1. The phone then doesn't immediately stop recording when I hang up the handset. I'm now noticing that after the first 2 recordings, subsequent...

I've installed the 1.57 TD final. I'm still only getting a beep when I lift the handset after a fresh power cycle. When I press the pushbutton for message playback, I get 4 beeps that sound identical to each other and different from the other beep that plays after I pick up the handset.

I'm using the Teensyduino 1.57 Beta #1 for Windows found here: https://forum.pjrc.com/threads/70196

Also, on the Arduino IDE 1.8.19, I have either the ability to compile with Serial or with MTP Disk (Experimental) but not both. Is there a config file I need to change to fix this?

Long story short, I improved the connections between phone and Teensy/Audio shield. I am now getting a "beep" tone after I pick up the handset. After I put it down and then pick it up, I hear no beep. I do hear the beep again if I power cycle the Teensy and then pick up the handset. It doesn't...

I now have a Teensy 4.1. I have now compiled your unaltered code found on your Github and it compiles with no errors. I can see that the errors I was getting stopped immediately after I stopped targeting a Teensy LC board and instead started targeting Teensy 4.0 and 4.1. I have now loaded the...

Oh yeah, I changed the model to Teensy LC because that's what I bought. I actually have no idea if the LC is incompatible because I'm a newbie. Are there any fundamental differences I should be aware of?

Hello, I'm using what I think is the latest version of DD4WH'S code. I've downloaded and installed the beta version of Teensyduino, and I have set the target path in the preferences to C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries. I have installed the MTP library to that path as...