3D printing

Cetus ESP32 Web UI

Rich C

— 4 min read
Cetus ESP32 Web UI

For many the web interface will probably be the most attractive feature of the TinyFab ESP32 CPU. I eventually got it setup so that I could upload prints to the SD card at reasonable speeds without having to actually remove the card

The Web UI comes from a separate open source project, technically two: https://github.com/luc-github/ESP3DLib and https://github.com/luc-github/ESP3D-WEBUI

Menu, Controls, Temperature

Overview (in pictures)

Extruder, SD Files, Commands
Commands
Hotend and bed temps
Marlin firmware update

Assorted screenshots

Overall thoughts

LikedCould be better
Control/monitor from anywhereGaps in temp monitoring, e.g. while waiting for hotend to reach temp
ResponsivenessNo real print progress indicator
Fast SD card uploads
OTA firmware updates

Not as complete/fancy as OctoPrint but does all the basics. I started using it to upload to the SD card after I had a print failure while printing over usb/serial (I think it was a hardware issue with my PC, but made me see the benefits of printing off the SD card), since serial uploads are painfully slow and the SD card on the Cetus MK3 isn't readily accessible

A progress/estimated time remaining indicator would be the one feature I'd love to see added

Setup

Connecting to WiFi

The ESP32 can only connect to 2.4 GHz networks

You will need to be connected to the printer via USB and open a serial terminal (I use CoolTerm on Mac but PuTTY or screen or any other terminal is fine). Baudrate should be 115200, everything else

should

be OK as defaults

To connect to WIFI I used the following sequence of commands:

  • [ESP100]<SSID>
  • [ESP101]<password>
  • [ESP102]DHCP
  • [ESP110]STA
  • [ESP444]RESTART

On restarting you should see connection progress logged to the serial terminal. If successful it will say connected and print the IP address

(By default the device should be called marlinesp on your network)

Once you have the IP address simply connect to the printer by entering the IP address into a browser

If required, user name/password will be admin/admin by default

<insert screenshot here>

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For reference, all the serial control codes are documented in ESP3DLib/docs/Commands.txt:

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Note:
1 - add space to separate parameters

* Display command list
[ESP]

* Set/Get STA SSID 
[ESP100]<SSID>

* Set STA Password 
[ESP101]<Password>

* Set/Get STA IP mode (DHCP/STATIC) 
[ESP102]<mode>

* Set/Get STA IP/Mask/GW 
[ESP103]IP=<IP> MSK=<IP> GW=<IP> 

*  Set/Get AP SSID 
[ESP105]<SSID>

* Change AP Password 
[ESP106]<Password>

* Set/Get AP IP 
[ESP107]<IP>

* Set/Get AP channel 
[ESP108]<channel>

* Set/Get radio state which can be STA, AP, OFF
[ESP110]<state>

* Get current IP
[ESP111]

* Get/Set hostname
[ESP112]<Hostname> 

* Get/Set HTTP state which can be ON, OFF
[ESP120]<state>

* Get/Set HTTP port 
[ESP121]<port>

* Get SD Card Status
[ESP200]

* Get full EEPROM settings content
but do not give any passwords
[ESP400] 

*Set EEPROM setting
position in EEPROM, type: B(byte), I(integer/long), S(string), A(IP address / mask)
[ESP401]P=<position> T=<type> V=<value>
Description:		Positions:
HOSTNAME_ENTRY 		"ESP_HOSTNAME"
STA_SSID_ENTRY 		"STA_SSID"
STA_PWD_ENTRY 		"STA_PWD"
STA_IP_ENTRY 		"STA_IP"
STA_GW_ENTRY 		"STA_GW"
STA_MK_ENTRY 		"STA_MK"
ESP_RADIO_MODE 		"WIFI_MODE"
AP_SSID_ENTRY 		"AP_SSID"
AP_PWD_ENTRY 		"AP_PWD"
AP_IP_ENTRY 		"AP_IP"
AP_CHANNEL_ENTRY 	"AP_CHANNEL"
HTTP_ENABLE_ENTRY 	"HTTP_ON"
HTTP_PORT_ENTRY 	"HTTP_PORT"
TELNET_ENABLE_ENTRY "TELNET_ON"
TELNET_PORT_ENTRY 	"TELNET_PORT"
STA_IP_MODE_ENTRY   "STA_IP_MODE"

*Get available AP list (limited to 30)
output is JSON or plain text according parameter
[ESP410]<plain>

*Get current settings of ESP3D
output is plain text 
[ESP420]

* Set ESP State
cmd is RESTART / RESET
[ESP444]<cmd>

* Change admin password
[ESP550]<password>

* Change user password
[ESP555]<password>

* Format ESP Filesystem
[ESP710]FORMAT 

* FW Informations
[ESP800]<plain>

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