How to Flash ESP32-S2 / Wemos S2 mini v1.0.0 purple pcb with usb-c

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grundy
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How to Flash ESP32-S2 / Wemos S2 mini v1.0.0 purple pcb with usb-c

#1 Post by grundy » 01 Jul 2022, 20:29

hello everyone,

i recently got these wemos s2 mini boards wich are nice because of the high gpio count but i cant really get it to work, did anyone get one of these running?

i connected the board to a win10 pc then holding 0 button - press rst button - release 0 button to put it in download mode -> serial port comes up on the pc

first i tried with the expressif 3.8.5 downloadtool from the espeasy release, it has a s2 button but does not work with the s2 over usb, so i got the 3.9.2 from the expressif site
there i (think i ) could download the (EDIT, wrong filename earlier ) ESP_Easy_mega_20220616_normal_ESP32s2_4M316k.factory.bin to address 0 , at least it gave no errors.

so finally i press reset on the board but then nothing happens , the serial port disappears so i cant get any output, no wlan appears and i cant enter settings to connect to my routers wlan -> how to continue at this point?

do i need to get an additional usb-serial and connect it to the board to enter settings or did i anything wrong because no ap appears ? hope anyone has a little hint for me ^^
Last edited by grundy on 01 Jul 2022, 22:12, edited 1 time in total.

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Ath
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Re: How to Flash ESP32-S2 / Wemos S2 mini v1.0.0 purple pcb with usb-c

#2 Post by Ath » 01 Jul 2022, 22:03

On an ESP32s2 board you must use an ESP32s2 build, as that CPU isn't compatible with the 'regular' ESP32 CPU. There are a few builds available that support the ESP32s2.
The princple of flashing the factory.bin at address 0x0000 is correct though :idea:

NB: I'm running a NeoPixel build here, as my s2 board as such pixel on-board :D
/Ton

grundy
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Joined: 01 Jul 2019, 22:08

Re: How to Flash ESP32-S2 / Wemos S2 mini v1.0.0 purple pcb with usb-c

#3 Post by grundy » 01 Jul 2022, 22:10

sorry i copied the wrong filename in the post earlier, of course i used
ESP_Easy_mega_20220616_normal_ESP32s2_4M316k.factory.bin

i hope the esp easy flasher tool supports the esp32 boards too one day , would make things easier ;-)

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Ath
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Joined: 10 Jun 2018, 12:06
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Re: How to Flash ESP32-S2 / Wemos S2 mini v1.0.0 purple pcb with usb-c

#4 Post by Ath » 01 Jul 2022, 22:27

The flashtool should support the ESP32s2, though my initial flash is usually via VSCode, as I'm in 'developer mode' :D
AFAIK, the Espressif flasher does support the s2, so that should work as expected. You might want to check the 'DoNotChgBin' checkbox, that may help
/Ton

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