el_supremo
Senior Member

De nada! And that has almost exhausted what I know of the Spanish language :) Pete

Can you check the output voltage of the smartphone charger with no load and then when it is connected to the T4? It may be producing more than 5V. Chargers aren't power supplies. Pete

In init_priv you need to change Wire.begin() to Wire2.begin(). Also, remove Wire2.begin(0x27) from the setup function - it will be done by init_priv. Pete

What sort of filtering did you use? Pete

P.S. I also use the standard one-bus I2C scanner and defined Wire to be Wire2. That also finds the ds3231 and the EEPROM. Pete

This code (don't remember where I found it) will scan for I2C devices on Wire, Wire1 and Wire2 on a T4.1. // i2c_scanner // http://playground.arduino.cc/Main/I2cScanner // // Version 1 // This program (or code...

FastCRC and the website also agree when given the input as a character string. /* FastCRC-Example (c) Frank Boesing 2014 */ #include <FastCRC.h> FastCRC8 CRC8;

You have to encode those 24 bits as 3 bytes - in hex they are 0x64,0x29,0x22. This website gives 0x93 as the CRC8 of those three bytes. FastCRC agrees: /* FastCRC-Example (c) Frank Boesing 2014 */ #include...

Post the code you used to test the CRC. Pete

return (uint8_t) ((rawregvalue >> 20) + (rawregvalue >> 16)) & 0x0f; Shouldn't that be & 0xff ? Pete

I don't think that would be useful. Having an option of using sign-magnitude for the DHT22 is pointless and potentially confusing because it only uses twos-complement. Similarly, there's not much point having an option...

I see one potential problem with your fix. The DHT21 might use sign-magnitude in which case you would need to split the DHT21 and DHT22 cases so that they handle the negative numbers correctly for that device. Pete

That should do it. Pete

Replace the debug printf with this which will add my interpretation of the temperature (I hope - untested): Serial.printf("DEBUG: %02X %02X %02X %02X : %02X (%6.2f)\n", data,data,data,data ,data,...

What is the actual temperature? I'm suspicious that the device actually represents the temperature as twos-complement, whereas both libraries treat it as sign-magnitude. If it is twos-complement, FFCF would...

Try this: DHT dht(DHTPIN, DHTTYPE, 27); and see my old thread about problems with the DHT22 on Teensy 3. If that doesn't help, let's try adding a debugging print in the library. Near the end of the read()...

Can you try the Adafruit library - it's in the Library Manager? Pete

Which library are you using? The one I have (by Adafruit) does not have a read22() method. Pete

You are reading the RMS result thousands of times a second even when it is not available. Try changing your loop function to this: void loop() { if(rms1.available()) { x = rms1.read(); if(x != 0.0 && s ==...

I've not been able to find one for the M7 so I have presumed that the M4 info is a lower bound on the performance of the M7 :) Pete

This webpage has a description of the FPU instructions and their timing. There's also a PDF version of the M4 DSP instructions. Pete

I tried your code with an M-Audio keyboard which has a modwheel. No matter how much I roll the wheel and play chords and arpeggios, the total note count is always zero at the end. You didn't include your...