09-03-2019, 01:26 PM
I found some useful information here:
https://www.thingiverse.com/thing:2798147
The printer seams to use AT commands compatible with the default AT firmware of the ESPs, but it doesn't send all needed ones:
1. AT+CWMODE to set client and/or AP mode
2. AT+CIPMUX to enable multi connection mode (needed because the way it uses AT+CIPSTART later to open the UDP connection)
The first can be solved easily by once setting a default via AT+CWMODE_DEF.
But the second one is harder. I managed to compile a modified version of the AT firmware where it is set automatically at startup which was somewhat successful, but I got stuck because the module loses WIFI connection shortly after AT+CIPSTART. Maybe it is a bit overstrained...
Well, and the very high baud rate of 2.250.000 makes the debugging a bit complicated.
https://www.thingiverse.com/thing:2798147
The printer seams to use AT commands compatible with the default AT firmware of the ESPs, but it doesn't send all needed ones:
1. AT+CWMODE to set client and/or AP mode
2. AT+CIPMUX to enable multi connection mode (needed because the way it uses AT+CIPSTART later to open the UDP connection)
The first can be solved easily by once setting a default via AT+CWMODE_DEF.
But the second one is harder. I managed to compile a modified version of the AT firmware where it is set automatically at startup which was somewhat successful, but I got stuck because the module loses WIFI connection shortly after AT+CIPSTART. Maybe it is a bit overstrained...
Well, and the very high baud rate of 2.250.000 makes the debugging a bit complicated.