schliepi
schliepi
I have exactly the same issue like thread opener @gotfredsen. I further investigated with a logic analyzer and sigrok's pulseview app. From what I see is: esp8266 has - running...
Some further investigation later. Is it really OS IRQ handling that slows slave mode down? Simple test setup how long it takes after input pin signal change until IRQ handler...
My research further up in this issue showed ESP8266 not being able to catch up to I2C speed 100kHz. When using an Arduino Uno as master and ESP8266 as slave,...