2PCS USB to ESP8266 Breakout CH340C ESP-01 ESP-01S Prog WiFi Programmer Downloader Adapter with Reset Auto-Download Circuit

I wish I had bought this years ago. This has to be the easiest way to program an ESP-01.

I thought I would have to wire an external jumper to get the upload to work, but after reading one other review where they had the settings necessary to auto-upload, I found out it works without having to have a switch or jumper. In the Arduino IDE, the flash mode must be "Dout" and reset method "dtr nodemcu".It is nice having the reset switch, restart the code while watching the serial monitor. It is also very convenient having the extra pin header for wiring jumpers to a breadboard while being powered by the USB port.

This is the one for me.Nothing worked other than this module.All my ESP01s programed flawlessly.Thank you !

I have tested this tool using an ESP-01 and some ESP8266MOD (ESP12f and ESP12e) boards.Both worked fine. However when flashing the 8266 I wasted hours troubleshooting a problem only to find out the flexible pins were slightly out of shape and werent making contact with the solder points on the ESP board. The simple fix was to simply keep the ESP slightly elevated in the socket. Once thats done you can plug in the USB cable, press and hold the flash button, then press and release the reset while continuing to hold the flash button. After a brief pause you can release the button and start your programming.Id suggest putting a small shim in the socket area to make it less fiddly when you insert the ESP chip.

Love this thing!!! Makes a QUICK job of flashing and testing MCU chips! No more juggling clips, wires and chip to connect up for flashing/testing, not sure if one or more are correctly connected. Just press the chip into the fixture, ALL GPIO's, VCC, GND, etc are firmly attached, EASY to address any contact point with .025 square pin-outs as a bonus! It even has a female cluster for quick attachment of small development boards. With a USB micro to supply data/power, LED lights to confirm communication and power plus buttons for reset and reboot. All mounted on a thick plexiglass base with all contact points labeled. Although I've only run 15 chips through this fixture, I have saved HOURS of setup and REPEAT testing/flashing time! Well worth the money! (fair price also)

ESP32 D1 mini boards (I tried several) have an issue on the TX line, either with connection or with UART-to-serial components already on the board and they fail to program using this device. The full ESP32 WROOM boards, don't expose the IO0 which is needed for auto programming (some documentation says online that IO0 is tied to the same pin as IO36 which was not true in my case as there was no continuity using a multimeter. When i soldered a wire directly to IO0 on the MCU, it started to work.I suppose if you are using it directly on the ESP32 barebones (without the DEV board) and tie into 3v3, GND, RX0, TX0, EN and IO0, it will work great. Also, note that TX from this boards goes to TX0 pin on the ESP32 and RX goes to the RX0. Also I had to use the RST pin of this device to go to EN of EPS32 to be able to reset/restart the ESP32. Not sure that the EN or IO4 pins do of this board.I had not make no other changes in software - I was using Arduino IDE.Now, if the manufacturer could provide a 3D file so we can print a 3D case for this, that would be great!

This is the most convenient USB-UART adapter I have seen for ESP8266. It can control RESET and GPIO0 of the ESP8266, making flashing from most flashing tools fully automatic and painless.The UART is already supported in in the Linux kernel provided with Ubuntu 20.04. No need to install anything, just plug and play. For Windows 10, the drivers will be automatically downloaded after plugin into the USB.It is cheaper and way more convenient than e.g. an FTDI USB-UART. I have flashed many times via this UART and never had any issues.

The auto-download feature works, but there were a couple of things I had to configure in PlatformIO to get this working. The first is the default flash_mode didn't work -- I had to change it from the default to "dout". Next, I was having to ground GPIO0 to get it into flash mode, until I found the option for this -- the upload reset method needs to be set to "nodemcu". Once I set this, every is working perfectly. Here are my platformio.ini settings:[env:esp01_1m]platform = espressif8266board = esp01_1mframework = arduinoboard_build.flash_mode = doutupload_resetmethod = nodemcuI believe there are similar settings in the Arduino IDE, under the tools menu look for flash mode and reset method. I hope this helps!

I’ve tried multiple and always thought I was doing something wrong cause none worked. But this one worked first time right out of the box.I’m not going back. Highly recommend it

Can flash maybe 100x and then it refuses to flash and keeps giving an error. Junk.