Anet boards up to v1.5

  • Step 1

You will have to unsolder the resistors R52 and R53 – they are zero ohm resistors, and serve no other purpose than connecting the atmega chip directly to the onboard USB to UART converter (the CH340 chip). Do it VERY careful – you don’t want to damage your board. If you don’t feel confident – don’t do it.

step1

  • Step 2

Prepare the printer’s motherboard. It requires a simple modification, that does not interfere with it’s operation afterwards – just solder 3 pin x 2 row male header on J8, and add 2 jumpers (or jumper wires) as shown on the picture:

step1

  • Step 3

Connect the ESP to J3 repsecting pinout

step3

Pinout
ESP J3
Tx Rx
Rx Tx
GND GND
VCC 3.3V
CH_PD 3.3V

Anet boards v1.7

Unlike older boards this board does not require you to remove any resistors.
You will have to solder two wires from number 9 and number 10 its recommender to connect these to pin 1 and 2 of J3 connector.

step1

Board pins voltage 5V
Board firmware Marlin
Board configuration note None, it use same serial as USB port so don't use both together
ESP3D configuration note Raw serial, no SD