Today I pulled out my oscilloscope and checked the slopes with the internal pull-up trick. It is a drama, the waveform doesn't even remotely look like it is digital!
This was easily solved with an external 10k pull-up as suggested!
Today I pulled out my oscilloscope and checked the slopes with the internal pull-up trick. It is a drama, the waveform doesn't even remotely look like it is digital!
This was easily solved with an external 10k pull-up as suggested!