I'm making a project with esp8266-01 module. Schematic is attached. It shows only required connections for this question.
I'm using arduino uno as ttl converter. I intentionally connected tx to tx and rx to rx, there's no mistake. I want to use this circuit to upload code to esp8266. My question is, should I connect gnd of arduino with the gnd of esp8266? I know i should connect when i use arduino normally, but as I'm using it as ttl converter (I connected gnd to reset) I'm not that sure.
I know this question is easy peasy for ones who are experienced but not for me. Any helps are appreciated.
Btw, I'm new in forum and now realized that my profile description text (whatever it is) is highly likely to misunderstood in a malicious manner. I changed it but it still seems same in this post.
abdulbakierenbilir:
I'm making a project with esp8266-01 module.
Come on now! Make it easy on yourself! Buy a proper dedicated (cheap) ESP-01 programmer,
Aliexpress item
It's not just the problem with the ground in your diagram in the first post - connecting directly to the Arduino UNO may put excessive voltages on the ESP.
Do you realise you would need capacitors on the LM1117? And probably a heatsink?
How were you going to put the ESP-10 into programming mode? The module I have shown does all these things correctly and automatically.
