Data to ttgo lora board oled screen

mortenx · September 13, 2024, 12:46pm

i am using ttgo lora board with 433-fsk firmware, is it possible to get sensor data to oled screen?

DigiH · September 13, 2024, 2:35pm

As the WebUI display has actually been fashioned after the actual OLED display of the LilyGo LoRa32, everything you see there should also be visible on the actual SSD1306 OLED display.

Can you see your other Bluetooth sensors in the actual OLED display and the WebUI?

The display functionality can be switched ona dn off and the brightness set in the HA gateway UI.

I assume you also want to see your HOBO water level sensor. This doesn’t work yet, as I just investigated and there is a small change missing in the display routine for the HOBO. I’ll submit the change soon, so it should be in the nightly development builds, available after around 3:00 UTC tonight.

mortenx · September 13, 2024, 3:37pm

WebUI is ok but oled dont work at all.
Is it possible that i2c pin `s are wrong, somewhere I saw information that some boards can have a different oled pin configuration

DigiH · September 13, 2024, 5:44pm

I suppose the TTGO LoRa board uses a different pin assignment then to the LilyGo LoRa32, which is the default with the lilygo-ble binary default build_flag
'-DZdisplaySSD1306="LilyGo_SSD1306"'
similar to the Heltec broads requiring
'-DZdisplaySSD1306="HELTEC_SSD1306"'

@paulus added a great generic SSD1306 option, so with this and a custom build it should also be possible for your TTGO with the above I2C pin assignments, as documented at

github.com

1technophile/OpenMQTTGateway/blob/development/docs/use/displays.md#connecting-a-generic-ssd1306-display-to-esp32

# Displays

## SSD1306 Display (Heltec SX127X, LILYGO® LoRa32 boards, generic SSD1306 displays)
Several options are available for the display of information on the SSD1306 display. Some options are exclusive to each other, and when a different option is enabled, the current option is disabled.

The current SSD1306 display states are being published to the `SSD1306toMQTT` topic, e.g.

`{"onstate":true,"brightness":50,"display-flip":true,"idlelogo":true,"log-oled":false,"json-oled":true}`

### Display ON/OFF
To turn the SSD1306 display on or off.

This can be enabled with the compiler directive `-DDISPLAY_STATE=true`.

MQTT Display OFF command:

`mosquitto_pub -t home/OpenMQTTGateway/commands/MQTTtoSSD1306/config -m {"onstate":false}`

MQTT Display ON command:

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mortenx · September 28, 2024, 12:18pm

Is it possible to change OLED pin numbers from web UI or from HA via mqtt?

1technophile · October 2, 2024, 9:01pm

OLED PINs are assigned at build time. They can’t be changed at runtime.