Esp8266-01 module attached to Arduino resets when DC motor runs

Question

Machifit JT80SL DC 3-6V Water Pump: 3-6v 
Servo sg90: 3-7.2v
Esp 8266 01: 3.3v

I have 2 Arduino Uno both has their own ac-dc power adapter. Lets say, 1st Arduino is Ard1 and 2nd is Ard2.

The Ard1 communicates to a web server (BLYNK) with Esp 01.

Using I2C, Ard1 sends command to Ard2 to power/move the DC motor/Servo.

So far, it has no problem operating with Servo. But,

Whenever the Ard1 commands the Ard2 to power the DC motor.

Right when the DC motor runs(using digitalWrite(motor,HIGH)) the Esp 01 resets.

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• Tried using analogWrite(motor, 102) though it won't reset instantly, prolong usage randomly resets it anytime.

• I also tried to test operating Servo and DC motor simultaneously in Ard2 using Serial commands, without I2C/Esp01. There was no problem at all, both works flawlessly.

Please, pardon me for the poor presentation. I have no solid knowledge on electronics/electrical.

Below is the diagram of the wiring. enter image description here

• Elliot Alderson: The RX input to the ESP-01 is a 3.3V input. You should not be driving it directly from the 5V output of an Arduino.
• Kolokoy: I didn't knew rx pin also has voltage input, thanks alot.

Answer 1

I resorted to a 9v battery supply for dc however problem still exist but not that severe, it still cuts the connection. Finally, my latest solution was attaching a 10ko resistor between esp's ch_d to 3.3v of arduino and 1k between gnd and esp's rx and another 1k between esp's rx to arduino's. So far everything went well.