Hi Chris, so architecture wise, I could call RDATAC before the loop, and inside the loop I will call ADS1256 _read(spi) function to store the data to the variable. Maybe if this works in side the loop, I could setup an interrupt / task to handle this data collection part? One of the issue here is that I have to MUX between channels. How does MUXing affect my RDATAC? When I call RDATAC, does it apply to all channels or I have to call RDATAC to each of them? When I switch channels, do I need to SDATAC and call it again afterward? The DIN is not LOW when I call ADS1256 _read. I am not entirely sure why this is the case. I use the built-in library from ESP32 and it might do some thing under the hood that I am not aware of. But since SPI is based on simultaneous read and write, I can just ignore the DIN during the reading phase right? I will give this a shot and see how this goes Khoi Ly
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