ESP32 wont flash

Annex for ESP32
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Re: ESP32 wont flash

Post by cicciocb »

TrevorB,
please put a picture of the module that you are using
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Re: ESP32 wont flash

Post by TrevorB »

This OK
ESP32.jpg
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Re: ESP32 wont flash

Post by cicciocb »

I still did not understood if your module is recognised or not as a serial port.

I think that you probably miss the CP2102 drivers ..
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Re: ESP32 wont flash

Post by PeterN »

I am not quite sure about the problem too, and might go in the wrong direction (?)
I assume that your module is seen correctly at a COM-port but does not enter flash-mode automatically.

The ESP32-module should at first show its used COM-port to the tool-kit after connecting via USB.
To start the flash mode the ESP32 module on the photo then needs a permanently pressed right button - while the left button has to be pressed shortly. This starts the flash mode. The built-in transistor network, which is insufficiently controlled by the USB serial chip, will not pull down the right pins for flash-mode.
After going to flash-mode manually with the buttons, you can start the firmware-flash from the tool-kit/serial-flasher.
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Re: ESP32 wont flash

Post by bugs »

I have at least 2 ESP32 modules with CP2102 USB chips. These program without any problem. The ESP32 does not need to be programmed in order for windows to see the USB chip.
I have just plugged one in to my laptop and looked in device manager. It says the driver is "Silicon Labs CP210x USB to UART Bridge".
Using windows 10 on the laptop and I have not downloaded any special driver.
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Re: ESP32 wont flash

Post by TrevorB »

Just flashed my ESP32 successfully,
Thanks for all the forum help
It did not need any of the pushbuttons pressing or the GP100 link
It did need the driver for CP2102 loading from the net
Device Manager was doing its best to ask for this, once I opened the correct tab

I have just written an ANNEX BASIC program in an ESP 32..for the first time

Again thanks for all the forum help
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Re: ESP32 wont flash

Post by ACarvalho »

[Local Link Removed for Guests] wrote: [Local Link Removed for Guests]Wed Jul 07, 2021 10:13 pm Just flashed my ESP32 successfully,
Thanks for all the forum help
It did not need any of the pushbuttons pressing or the GP100 link
It did need the driver for CP2102 loading from the net
Device Manager was doing its best to ask for this, once I opened the correct tab

I have just written an ANNEX BASIC program in an ESP 32..for the first time

Again thanks for all the forum help


It looks like CP2102 was the one that needed a driver.
I've seen a lot of posts on the net about drivers for CP2102 and CH340, it's odd because CP2102 is the older one.
In Aliexpress, some vendors mention specific chip and CP210x seemed to be the preferred ones.

But again, I don't use Windows, so, I can't tell the difference.
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