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luc-github / ESP3D

FW for ESP8266/ESP8285/ESP32 used with 3D printer

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[Question] Is the Creality V1.1.4 mainboard supported ?

tritri0903 opened this issue · comments

commented

Issue: Communication Problem Between ESP32 and Ender 3 (V1.1.4) (Bit Size Compatibility)

Description

I am encountering difficulties in establishing communication between an ESP32 module and my Ender 3 printer with a V1.1.4 board. I suspect that the issue might be related to the differences in working bit sizes – the Ender 3 operates on 8 bits, while the ESP32 is a 32-bit device. This GitHub issue is to seek help, insights, and solutions to address this bit size compatibility problem.

Current Situation

  • Ender 3 3D printer with Marlin 1.1.9 firmware and a V1.1.4 board.
  • ESP32CAM with ESP3D V3.0.
  • Connected the two using UART with Rx and Tx, following the documentation.
  • Attempts to establish communication between the two devices have been unsuccessful.

Steps Taken

To address this issue, I have already taken the following steps:

  • Checked the connection with a logic analyzer.
  • Utilized both ESP3D V2.1 and V3.0.
  • Tried both an ESP32 classic and an ESP32CAM module.
  • Conducted research on relevant documentation and online resources, but found an issue (#363) without a solution.

Environment

  • Ender 3 3D printer with a V1.1.4 board (8-bit architecture).
  • ESP32CAM module (32-bit architecture).

Versions

  • Ender 3 Marlin 1.1.9.
  • ESP32CAM ESP3D V3.0 (and V2.1, with the same issue).
commented

Thank your for submiting, please be sure you followed template or your issue may be dismissed. if you deleted the template it is here

commented

no that is not the issue a 8bits board can talk to 32bits by serial without issue - esp32 is sensitive and ony work on gpio pins with 3.3v - are your rx /tx pins using 3.3v or 5v from your printer board ?

commented

Yes, I am aware of the 3.3V and 5V voltage issue with the RX and TX pins. Initially, I used a voltage divider to lower the voltage for the ESP32, but unfortunately, this didn't establish communication. To ensure voltage compatibility, I subsequently utilized a logic level converter, but the communication issue between the two devices persisted.

commented

you connect to which uart on your board ? the one used by USB also ?

commented

I connected to the same pins as instructed in the tutorial (https://esp3d.io/esp3d/v3.x/installation/wiring/index.html#creality-cr10-ender-3-board). The connection to the UART of the board is confirmed to be correct because, using my logic analyzer, I can observe the Marlin startup message.

commented

are you using same baud rate as Marlin ?

commented

Yes both are setup on 115200.

commented

and nothing is connected to USB ?

commented

Nothing in the usb and in the micro-sd slot.

commented

I would the suggest to find a USB/Serial adapter like these : https://www.aliexpress.com/w/wholesale-ftdi-adapter.html
and connect its tx/rx/gnd to your rx/tx / gnd of your board and connect it to a serial monitor and check you can communicate with your board to be sure rx / tx are ok for communication send M105 or M115 and get response

If ok then do same with your esp32 and send [ESP420] or [ESP800] this will also allow you to be sure the pins are functionnal

That would help to debug your issue

commented

Thank you! I'll give this a try and will report back with the results.