How to Configure a Programming Circuit for an ESP32 Module 

1. Sender, in this case the PC, asserts RTS (Request to Send) to initiate handshake. 2. Receiver asserts CTS (Clear to Send) to indicate that it is ready to receive data. 3. Sender asserts DTR (Data Terminal Ready) for the duration of the transmission. 4. Sender transmits data continuously. The receiver may lower CTS during the transmission to exercise flow control. 5. Sender lowers DTR and RTS to end transmission. 6. Receiver lowers CTS.

Excellent video. Thank you for taking the time to explain this everyday topic that most of us take for granted. It was 25 mins of time well invested as I learned a huge amount.

Brilliant, been looking all over for help on adding USB programming like the dev boards have.

Very good explanation, thank you. Regarding the mosfet, I would recommend the 2N7002.

What a great explanation! Thanks for sharing!

Good job. Well Explained and excellent video. I was trying to program an ESP32 WROOM and was able; by using another ESP32 module (EN of the module is connected to GND) and connecting TX0, RX0 to the WROOM + 3V3 + GND. EN of the WROOM had the resistor 10k to 3V3 with a 100nf to GND + push button to GND (RESET button). GPIO0 of the WROOM is also connected to 100nf to GND + push button to GND (BOOT button). To program, press both buttons, then release the reset button. ES32 will start uploading.

Very clear and concise, thank you.

thanks for sharing quality knowledge

Hi, I just discovered your channel and am absolutely blown away. Super cool content and very well delivered! One question I have though, on the newer esp32 s2 and s3 they have a USB to uart chip already integrated in the chip (at least as far as I understand). How can I flash my software onto these? Do I also need to pull down GPIO 0 to do that or is this already implemented like you did in the internal USB to uart chip?

RTS = Ready to send 👍

Nice! Thanks for this video!

The video was well explained. However, I have a question. If we have uploaded our code and no longer need the USB connection to the computer, and at some point our device resets (either intentionally or unintentionally), IO2 has a low value, causing the ESP32 to enter boot mode, which we do not want. How can we resolve this issue?

Great video , thanks for taking the time to do this. Can you tell me what part no. you would recommend for the mosfets? Many thanks

As far as the mosfets - you have to use the type for digital circuits

Great video!!

Strapping pins are advisable to use the Push button and LED??

I hope you're doing well. As a developer interested in ESP32-related projects, I'm seeking guidance on how to program the ESP32 WROOM 32D using an ST-Link V2. Could you provide some insights into this matter? I would appreciate it if you could direct me to useful resources, relevant instructions, or any tips that could assist me along this path. Thank you very much,

Thank you!

Hi, what if I want to send keyboard data via uart? If I understand correctly RTS goes high and I enter in configuration mode even if I don't want to? Correct?

These are not “simple” MOSFETs, cause the voltage is 3V3. Not many of them operate with such voltage on a gate.

I bought an s3 wroom a few months back. Once it came in the mail i jumped on arduino ide and realized it wasn't one of their boards. After going to the venders sight for some info i found there wasnt much. After several failed attempts to get the camera going i threw it in a drawer. Lesson learned. Ill buy from more well known vendors. Freenova was a let down

Hi Tnx for covering the datasheet completely on this section, I used 2 transistors instead of MOSFETs in my design I used the esp32 chip directly that I'm starting to regret, because first of all it won't go into download mode, DRT and RTS are HIGH, I tried to used a jumper and 10K resistor for strong pull down, yet no luck same error:" Esp32 :No serial data received." The TX led on my design blinks when I try to upload the code but then I receive the error, upon further investigation I noticed that my chip has no internal flash memory, could it be the reason for the error?

Can you name the MOSFETs which you have used?

I purchased a sparkfun USB-C to FTDI adapter then realized too late that it doesn't have the mosfets to toggle the RTS/DTR IO0/EN pins like they need to be (it just brings RTS/DTS straight out the header). Does anybody make a board that has the CH340 on it w/ the RTS/DTS toggled to a header ? Thanks !

If the CH340C is powered by 3V3, does the chip have some internal circuitry to deal with the D+ and D- voltages at 5V? I can't find any more info on that, hoping you would have some insight?

Good info !

I liked your way of explaining so I joined the channel, can I ask you a question? I have a program in the arduino IDE, it runs in a dev module, with a wroom chip, and I bought some SOLO-1 chips, what I did was remove the wroom from the module and solder the SOLO-1 chip. but in the arduino IDE it doesn't exist, or I don't know which module uses the SOLO-1 chip..so I tried to program choosing boards at random and although the IDE shows that it is programmed correctly, but in reality it doesn't run, do you know something about this SOLO-1 chip?

Good day can you help me design for Four 12v battery with esp32 12v Battery monitoring

👌👌👌👌👌🔥

Good day. Do you make robots?