Tsamota display on an ESP8266 - with an SSD1306 display - what am I doing wrong?

[scargill]

Has something changed ercently? I've an ESP8266 with built in SSD1306 -had it working in ESPHOME but some sevree limits - so I thought I'd go back to Tasmota.
I put tasmota-display on the board using the normal we flasher... But I can get nothing out of the display despit semingly setting it up correctly.

Belkow is the log - I set displaymodel 0, displaymode 7 in the console then again in the console displaytext [z]Hi there

I also checked I had i2c correct see the i2cscan. I HAVE to be missing something...

22:39:51.110 CMD: displaymodel 0
22:39:51.115 RSL: RESULT = {"DisplayModel":0}
22:39:57.233 CMD: displaymode 7
22:39:57.238 RSL: RESULT = {"DisplayMode":7}
22:40:11.886 CMD: displaytext [z]Hello
22:40:11.892 RSL: RESULT = {"Command":"Error","Input":"DISPLAYTEXT [z]Hello"}
22:40:29.662 CMD: i2cscan
22:40:29.682 RSL: RESULT = {"I2CScan":"Device(s) found at 0x3c"}

My config is gpio12 scl, gpio14 SDA (I took that from the original working ESPHOME software).. and for good measure added gpio15 as option A.

The displaytext output is saying command error. I'm on tasmota display v15.1 - someone please help me get out of this jam.

[sfromis]

In addition to having some unused gpio as Option_A3, you also need a display descriptor. With ESP8266, the easiest is probably to have it in rule set 3. For SSD1306, this would typically be like:

Rule3 :H,SSD1306,128,64,1,I2C,3c,*,*,* :S,0,2,1,0,30,20 :I AE D5,80 A8,3F D3,00 40 8D,14 20,00 A1 C8 DA,12 81,9F D9,F1 DB,40 A4 A6 AF :o,AE :O,AF :A,00,10,40,00,00 :i,A6,A7 #

Based on https://github.com/arendst/Tasmota/blob/development/tasmota/displaydesc/SSD1306_128x64_display.ini
If you use a build including a file system (not in the display build you used), you can have it as file display.ini

When this is configured correctly, you should automatically get DisplayModel being 17 (do not try to set it), and boot time messages like:

00:00:02.565 DSP: Rule3 descriptor used
00:00:02.566 I2C: SSD1306 found at 0x3c
00:00:02.697 DSP: SSD1306 initialized

Not sure where you got that "displaymode 7" from, this not a valid option. To use the DisplayText command, you should be in DisplayMode 0. As an initial test, DisplayMode 1 (time/date) can also be used.

[scargill]

My hero!! I'd forgotten all about that. Thanks.

[scargill]

Above you reminded me of the current correct config for a 128*64 ssd1306 - I've written all of that up so others don't make the mistake I did (and credited you of course) - one last favour - can you please give me the same config but for the 32 line versions - - or point me to same.

[sfromis]

Same directory with the 128x64 display descriptor also has the similar for 128x32:
https://github.com/arendst/Tasmota/blob/development/tasmota/displaydesc/SSD1306_128x32_display.ini
Not tested, but I'd expect that you should remove the first comment line if/when stringing the lines into a one-liner for the Rule3 approach.

[scargill]

Thats good thanks.