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Well there you go; I did not realize that. Thanks for the lesson! Sorry for the derail.

Looks interesting. Just an observation but do you really wish to use: ]analogRead(6); Analog pins are more traditional referenced with as "Ax", as in ]analogRead(A6); You may actually be targeting the wrong hardware pin.

For what it's worth, https://www.pjrc.com/teensy/td_download.html is displaying some older 1.49 information:

I haven't got the hardware to test myself at the moment but only AudioMemory(8) is jumping out at me. Try something higher like AudioMemory(20). If it is a memory type issue, maybe check out Examples > audio > MemoryAndCpuUsage What Teensy board and CPU speed are you using?

https://github.com/PaulStoffregen/cores/blob/master/teensy3/pins_arduino.h#L122 Paul's example in post #3 should really prove it out though.

Bob, I think you might be still looking at the wrong area. The Ports (COM & LPT) relates to USB Serial. The Teensy programming is done over USB HID. When I press the program button on a Teensy 3.2, it shows under Device Manager > Human Interface Devices > USB Input Device.

Very cool. Would definitely be worthy of being posted in the 'Blog-Project-Submission' part of the forum. It would be nice if there was something like a Github page - especially with the different versions/updates. I found the way it's laid out in the webpage a bit messy to follow but at least...

BJB's advice is probably the best so far in this thread

Looks like what you're going for is actually a little more similar to my experiences than I initial thought. 60079-0 and 60079-11 where applicable. Still, I'm just a firmware guy so don't put too much weight on what I have to say. I've definitely seen the standards been left to peoples'...

Regarding intrinsic safety, I've only been indirectly exposed through my job in which we certified for a complete, portable battery powered piece of equipment; not a component/sub-assembly. Regardless, I thought I'd comment as this is a pretty niche thing so I'm not sure there will be others on...

I'd highly suggest something like TI's INA219 if you haven't seen it. Even just as a way to rapid prototype/proof-of-concept that may be a good starting point. Adafruit make a breakout (https://www.adafruit.com/product/904) and Arduino library which would make it quite simple to get going...

I'm curious what you mean by this. The I.MX RT implements ARMv7-M so it should at least have the same DSP-like capabilities of the current M4/teensy 3.x with some added goodies.

The error is probably the empty DEBUG_PRINT(); at line 304. Quick compile test: void setup() { Serial.begin(115200); Serial.print(); // Serial.println(); } void loop() { // put your main code here, to run repeatedly: } This generates a error message like yours. Above that message it...