[subhobroto]

With the supercheap sub $5 ESP32/STM32 boards (both have Arduino core support) and their equally cheap add onboards for camera, ethernet or USB OTG - who exactly are using the Teensy line today and why?

I'm genuinely curious.

[dejv]

For me it is rock solid USB and known quality. I use them as a bridge between analog/ADC board and USB, doing some buffering and signal processing for my spectroscopy projects.

[pravda]

Think of it as an ARM prototyping tool.

You would switch to the bare chip for production. [1]

Of course, for low production runs, you could stick the Teensy board in your product.

[1] https://www.nxp.com/part/MIMXRT1062CVL5A#/

[tyingq]

The $5 boards aren't 600MHz M7's with loads of SRAM and Flash.

[ATsch]

Maybe, but what scenarios are there where you'd want that, be willing to spend 30 dollars on your microcontroller solution and not benefit from a more capable linux SOC? (With an optional $3 M0/M3 for realtime if required)

[tyingq]

Yes, it's not needed for every use case. There are some obvious places where 600MHz helps, either for input sample rate or output waveform. The Teensy 4.0 is $20, with the same processor as the 4.1.

Also, 100 mA current draw with the CPU at full speed. For some use cases, that is helpful...versus the RPi.

[sgt]

Would this Teensy be suitable for real time audio processing? I mean little-to-no latency.

[subhobroto]

> little-to-no latency

I don't follow Teensy deeply but both the ESP32/STM32 are being used for real time audio processing.

I'm using it to decode DTMF without using a one more DIP IC.

I'm sure there's some latency involved but for my use case, the bang for the buck is great.

[btashton]

These are substantially more powerful than both of those families.

[ATsch]

Also substantially more expensive, especially compared to the likes of the banana pi zero, which gets you four cores at 1.2Ghz, 512MB RAM, Linux and a GPU for 35% cheaper. Pair that with a Blue Pill STM32 for $3 if you need realtime and you still have money left over.

[subhobroto]

That looks like a great stack!

In the "Pi" family, for a Linux SBC, which pi/clone gives a good bang for the buck?

banana pi zero has shown up multiple times but since you are in the know, I wanted to ask what's a good SBC to run OpenWRT on, for example

[subhobroto]

> Blue Pill STM32 for $3

The Black Pill STM32 for $4 are an ever better value!

[clarry]

https://www.st.com/content/st_com/en/products/microcontrolle...

[btashton]

What is your point? This is more powerful than all of the ones on your linked page.

[duskwuff]

Marginally. The STM32H7 series offers Cortex-M7 cores at up to 480 MHz, with a Cortex-M4 coprocessor on some parts at 240 MHz. It's not quite as fast as the i.MXRT1052, but it's damn close.

[clarry]

The posted coremark scores do not support your claim that NXP iMXRT1062 is substantially more powerful. If I take these numbers at face value, then STM32 promises up to 45% more perf.