I have been trying to configure my Wemos D1 Mini Pro as a shield with my arduino uno. When I get it working I will be changing to an esp-01 and pro mini. I have connected the two boards as shown here and have no success getting them to work. I am reading the output from the wemos board with Termite to see where the problem is occurring. When I turn on the Wemos and the arduino the Wemos start giving out errors. The arduino just stops at Failed to disable Echo. I also tried to read the commands the arduino was giving the esp with a separate usb to serial and then writing manually the commands to the Wemos board. I always get error. I think the firmware I am using is the problem. I tried using SDK version 1.5.4 and some other firmware but I forgot them.
This is what the Wemos board says when connected to the Arduino and reading the serial of the Wemos.
This is when I connected a seperate USB to serial to the arduino.
Has anyone had this problem and does anyone know how to fix it?