I think it is difficult.

But you can use a voltage divider made up of two resistors, about 100K. If the transducer has a large value of output impedance, the voltage divided resistor should be larger.

The arise of Matter reminds me of IEC61850, an Equipment interoperation communicaton proctol used for power system, a very Successful one. IEC 61850 could makes the equimentment from different corporation works together, very important for the larger intelligent power substation. The popolur of IEC6...

Thanks, I have changed my ideas.

Maybe FTM of c3 or s3 is a good alternative choice. And I have make some progress.

我用过esp32的idf5.1mcpwm，和wifi，mqtt一起用的。

程序不会崩。但是我从示波器能看到mcpwm产生的spwm的正弦波形会在其它线程工作时轻微畸变。如果我删除wifi和mqtt的功能模块，波形一直完整。

所以我猜测新版本的mcpwm线程应该是安全的，但是实时性可能会受影响。

Usually, the accuracy of a ADC depends on the voltage reference, for c3 the VCC 3.3V. You may measure your c3's VCC for 10 seconds for sure. I have not used the adc of C3. But for ESP32, I can not see the drift of adc for half an hour. For your microphone, is it a capacitive type. If it is, it may d...

Thanks for attentaion. They are under developing now and will be put on github latter!

The programe is not perfect now, and something need to be modified to let the wavefrom be continous.

Maybe you could also use the web interface for you signal generator.

Thanks for your attention! If I remember rightly, S2/S3's adc only support 100ksps, somehow slow for an oscilloscopes, but more expensive. If the USB transmission is need, the USB to serial port may be more convenient. Native USB may be more fast, but difficult to develop. Several oscilloscopes comp...

A demo now, under developing. 示波器.png Two-channel, 150 ksps/ channel, for single-chanel, 2Msps. Communication with mqtt, also support coap or Matter for future. y-axis, 4095 bit resolution. 1V, 1.33V 2.66V, 3V four measurement scale. mobile, ipad, PC support. no APP or exe, just scan the two-dimensi...

I did not find the maximum sample rate of C6's adc in datasheet or technical reference. Does anyone know that? By the way, the adc sample rate of S3 just support 100ksps, somewhat slow for FOC current measurement. Could C6's adc reach 2Msps just like ESP32? Is there possibility for future' productio...

Alternative to STM32F7/H7, good!

Hoping better performance of ADC, supporting PTP V2.