How to ESPHome on the WT32-ETH01-EVO (ESP32-C3)

ESPHome
1

Heyhey ESPHome users,

yesterday I received a ETH01-EVO and soldered the POE hat.
Unfortunateley I´ve no luck, programming the device at all.

Using a TTL flasher, I connected the device as follows:

Here is the pinout:

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  • I bridged IO9 to GND to set it to boot/flash mode. Seems to work, as the status LED on the piggypacked ESP32-C3 doesn´t light up, while going on after boot when not bridged
  • Connected 5V and GND to power the ESP
  • Connected TXD0 and RXD0 to RX and TX with the TTL flasher
  • Tried flashing with esptool. first tried ESPHome, then locally with tasmota.
    esptool.py --chip esp32 --port /dev/cu.usbserial-10 --baud 115200 --before default_reset --after hard_reset write_flash -z --flash_mode dout --flash_freq 40m --flash_size detect 0x1000 bootloader_dout_40m.bin 0x8000 partitions.bin 0xe000 boot_app0.bin 0x10000 tasmota32.bin

Anyone got this running? Ideas, where i went wrong?

Thanks and regards

Jakob

2

Pretty sure it is IO0 to gnd to put an esp32 into flashmode.

3

The Davicom DM9051 SPI Ethernet Controller that is on this module is not supported by ESPHome at this stage.

4

Try changing the chip type in your esptool command to --chip esp32c3

Also, use a tasmota bin file specifically for the C3 chip

5

Thanks for sharing. Looks like its in progress: Support DM9051 SPI ethernet device by bmork · Pull Request #6861 · esphome/esphome · GitHub

6

Thanks for sharing. Really helpful, as I wasn’t aware of platform specific builds.
With this I was able to flash tasmota to the WT32-ETH01-EVO:

esptool.py -p /dev/cu.usbserial-10 write_flash 0x0 ~/Downloads/Tasmota/tasmota32c3.factory.bin

Firmware can be found here:
https://ota.tasmota.com/tasmota32/release/tasmota32c3.factory.bin

More about funcionality later :wink: