ESP8266 as a programmer

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Hello!

I am trying to make an NodeMCU 1.0 working like an Arduino Programmer (uno in this case).

First of all I have connect the Arduino RX to D3. Also, the Arduino TX to D2 (with 3 diodes in series). And the D1 pin in the resetPin of ATmega328P.

I init the serial in NodeMCU code with this:

SoftwareSerial updateSerial(D2,D3);

and after this, in setup function:

updateSerial.begin(4800);

I start with a pulse in reset, in order to trigger the bootloader.
After this I am sending the bytes to get Sync

updateSerial.write((byte)0x30);
updateSerial.write((byte)0x20);

And I remain to get a response with this line (after delay(30)):

Serial.println(updateSerial.read());

The problem is that I receive always -1. The right answer would be 0x14 0x10, but I am not sure.
Is there any idea?

2

is 4800 baud the right speed for your Uno Board?

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