Library seems to fail reading DHT22 with 3V3 logic/8Mhz

[ikatkov]

How to reproduce:
Arduino Pro Mini 3v3, 8Mhz 328p
Wire as usual, pull up data line to VCC

The library keeps returning -999 for both temp and humidity.
The Adafruit DHT lib works fine on the same hardware.

[RobTillaart]

Hi
not much time to investigate now.
The 8 MHz might be difficult for the way DHTNew clocks in the bits, Adafruit uses a simpler algorithm and analyzes data afterwards while I try to detect errors during the handshake.

Can you run the dhtnew_pulse_diag.ino sketch and post the output?

[RobTillaart]

Please reopen if issue is still relevant