Hi @ajb2k3 Yes I have checked the data sheet and it's working fine. Just read all the byte need to long time in my program even if I read with 1Mega. I suspect it would be twice as fast without this pause. I found a information about this break, but i have no idea how to do this with the Uiflow activate polling mode (use portMAX_DELAY) The last parameter -1 stands for the timeout in milliseconds. If you want to ensure that no RTOS scheduling is delayed, you can set portMAX_DELAY i2c_master_transmit_receive(dev_handle, buffer, 2, buf, 9, portMAX_DELAY);

@ikanode What do you mean by "Those are the incomplete instructions that don't work for Web IDE" Those were written for the WEB IDE! WEB USB host mode? experimental web browser system that isn't supported. Wifi SSID screen is used to set the wifi access point and password on a wifi network this only comes up if you didn't set the skid and password when flashing using M5Burner. After the said and password is set you be been shown the API code which need to be set in uiflow in order for uiflow to connect. There is only one online server at present and its behind the great firewall of china which sometimes causes connection to be dropped especially with so many people trying to connect. This book is not complete but it may answer some more questions.https://github.com/Ajb2k3/UIFlowHandbook/blob/master/UIFlowhandbook.pdf

@thrasher Sorry for my bad writing. So I want to use 2 piece of PZEM for my project and I test PZEM that connect to UART2 it can send value to monitor with speed 115200 and then I test to PZEM that connect to UART0 it not show any value excpet "NaN" from my monitor. how can I fix this?

@ashwindec11 yes, the motors are 12v and are fed from the 12v side of the LM2596SX, the logic and core are fed from the 5v side of the LM2596SX