MycilaDataLogger

ESP32 firmware to connect an ESP32 to an existing ESP32 to view the Serial logs including crashes and stack traces remotely through a web interface

Table of contents

Downloads

Releases (firmware binaries) are available in the GitHub releases page:

Naming convention:

FYI, Supported ESP32 boards with Ethernet support:

First-time flash (factory image):

esptool.py erase_flash
esptool.py write_flash 0x0 MycilaDataLogger-BOARD.FACTORY.bin

Board	RX (connected to TX0 on remote ESP32)	TX (connected to RX0 on remote ESP32)	WiFi	Ethernet
denky_d4	22	21	✅	❌
esp32-c3-devkitc-02	18	19	✅	❌
esp32-c6-devkitc-1	4	5	✅	❌
esp32-gateway	16	17	✅	✅
esp32-poe	35	33	✅	✅
esp32-s2-saola-1	18	17	✅	❌
esp32-s3-devkitc-1	16	17	✅	❌
esp32dev	16	17	✅	❌
esp32s3box	19	20	✅	❌
lilygo_eth_lite_s3	17	18	✅	✅
nodemcu-32s	16	17	✅	❌
tinypico	4	25	✅	❌
waveshare_esp32s3_eth	19	20	✅	✅
wemos_d1_mini32	16	17	✅	❌
wipy3	4	25	✅	❌
wt32-eth01	5	17	✅	✅

Notes:

For now, you can only read the remote ESP32 TX0 logs, not send data to it. So the TX pin connection (going to RX0 on remote ESP32) is optional.

On first boot the device creates an access point to configure WiFi or stay in AP mode.

Then it will keep your preferences and connect to your WiFi network automatically on next boots (or stay in AP mode as chosen).

The project includes mDNS support so you should be able to access it at http://DataLogger.local/ in WiFi or ETH mode.

On macOS, the Discovery app can help you find mDNS devices on your network:

You can also directly stream the ESP32 logs to a terminal by using websocat:

websocat ws://<device-ip>/webserialws

This project is licensed under the GNU General Public License v3.0. See the LICENSE file for details.