I believe the esp32 datasheet says the boot strapping pin is latched to whatever value it took on reset, so you don't actually need to hold it down for the entire duration of the upload. I'm about to try this project, so I will find out for sure pretty soon :)
Hi, I would like to know how did you wire all esp PIN. 6 months ago I made my own board esp-based. I use your same model ESP WROOM 32D but no procedure to boot the chip has worked. Can you help me please?
I actually made a better(I think) video about this take a peak I go over the circuit….. do you have a capacitor from io0 to ground that can cause issues
@@newsogn5148 thanks for your answer. If you want I can share with you my schematic. I have contacted various maker and everyone show me different circuits and different methods to program esp, but no ones work
I couldn't read your schematic very well on my screen. Can you link to a closeup image of the 3.3V power circuit section (like in the upper corner at time 2:55)? I've been meaning to try JLCPCB out. Good to hear you have had good success with them.
I am actually going to try something a little different right now I just have the HLK 5M03 going to the esp32 with some input capacitance, but I think I will try to get a 5v supply on there and then use a linear voltage regulator to knock it down to 3.3v that way i don't get the power supply voltage drop when I turn on a relay......
Thanks for this video! It's helping me lay out my own board. I'm sure you've seen the ESP32 DevKitC schematic, where in the bottom left hand corner they show their fancy USB to UART converter that also has the IO for controlling the EN and IO0 pins with the DTR and RTS signals. When I saw that, I got scared that these signals are also needed for communication during the upload process. I know that, for example, the ATMega328P on most Arduinos requires weird voltages on the reset/enable to put it into download mode, and might even be modulated. Just to be clear, the EN and IO0 pins on the ESP32 don't require any advanced modulation during the upload, right? It looks like the only action those two pins see are right at the beginning when you manually put the chip into download mode. Your USB to serial adapter isn't doing anything besides TX and RX? Thanks.
I believe the esp32 datasheet says the boot strapping pin is latched to whatever value it took on reset, so you don't actually need to hold it down for the entire duration of the upload. I'm about to try this project, so I will find out for sure pretty soon :)
you are correct!!!! however when it is attempt number 253 superstition kicks in pretty hard hahaha
Hi, I would like to know how did you wire all esp PIN. 6 months ago I made my own board esp-based. I use your same model ESP WROOM 32D but no procedure to boot the chip has worked. Can you help me please?
I actually made a better(I think) video about this take a peak I go over the circuit….. do you have a capacitor from io0 to ground that can cause issues
@@newsogn5148 thanks for your answer. If you want I can share with you my schematic. I have contacted various maker and everyone show me different circuits and different methods to program esp, but no ones work
I couldn't read your schematic very well on my screen. Can you link to a closeup image of the 3.3V power circuit section (like in the upper corner at time 2:55)?
I've been meaning to try JLCPCB out. Good to hear you have had good success with them.
I am actually going to try something a little different right now I just have the HLK 5M03 going to the esp32 with some input capacitance, but I think I will try to get a 5v supply on there and then use a linear voltage regulator to knock it down to 3.3v that way i don't get the power supply voltage drop when I turn on a relay......
@@newsogn5148 Thank you for the info. Ah yes, that makes sense. Appreciate your video.
Did you have to install any bootloader or anything on the ESP32 before this would work? Nothing via JTAG?
No I have never had to, I’m going to make a new video for this soon l have found better ways to do this….
@@newsogn5148 Thanks! Useful info!
Thank you very much for this video, it helped me a lot.
Thanks for this video! It's helping me lay out my own board.
I'm sure you've seen the ESP32 DevKitC schematic, where in the bottom left hand corner they show their fancy USB to UART converter that also has the IO for controlling the EN and IO0 pins with the DTR and RTS signals. When I saw that, I got scared that these signals are also needed for communication during the upload process. I know that, for example, the ATMega328P on most Arduinos requires weird voltages on the reset/enable to put it into download mode, and might even be modulated. Just to be clear, the EN and IO0 pins on the ESP32 don't require any advanced modulation during the upload, right? It looks like the only action those two pins see are right at the beginning when you manually put the chip into download mode. Your USB to serial adapter isn't doing anything besides TX and RX?
Thanks.