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hi.
i have the arduino with ramps 1.4 . i was istalled the marlin 2.0.x latest . and esp module with esp3d frameware. it work own without the arduino and ramps . but when i need to controle my printer i can't to see any ip in lcd or any axis work or data tx or rx connect. so what is the probleme.
in addition am using the rx (ramps) to tx (esp) and tx (ramps) to rx (esp).then am using the 3.3volts and gnd from other pins like picture.