How to flash nodemcu v3 with Arduino nano?

Question

Arduino

Accidentally ripped out the micro usb connector on nodemcu v3 with meat. In a few days another one will arrive, but there was a need to test a new sketch and I would like to know, since more miniature esp are sewn using the CH340 converter on arduino, is it possible to somehow connect nodemcu? I didn't find an answer on the internet.

Answer 1

For firmware, Arduino is actually not needed, only any converter is needed.
Arduino nano has such a converter.
It can potentially be used, but it must be taken into account
- the output of the converter is connected to the MK, for use it is necessary to break the connection, but this is still a hemorrhoid. It's easier to find adapters .... preferably three volts at once, the issue price is 200 rubles. plus minus
- take into account that the nano is usually powered by 5v, it is necessary to coordinate the levels, it is enough to put a diode in the circuit between the Tx Arduino and the Rx modemcu, in the other direction they are tolerant
- on the modemcu, the prog and reset buttons should be available

Answer 2

You are looking for which legs on nodemcu v3 are uart for firmware, you connect an arduino with a grounded reset to them (so that the arduina is silent).
The com port that appears in Windows will be the comport for nodemcu firmware, then you flash it as usual.
You may need to press a button to flash the nodemcu.
Recently there was a question Problem with ESP8266 (ESP-12F)?
Do it by analogy, just connect it correctly.