Peter,
According to this article, Pin 23 is NOT the RST for the SX1276 LoRa, but Pin 14 is. Did you actually use Pin 23?
My board, TTGO ESP32 LoRa T3 V1.6.1, had quite a few pins different than the board used in the article (Pins on LoRa, OLED).
I contacted one of the programmers, employed by the Chinese company that produced the board, and he told me there were only 2 versions of their boards that had the OLED RST function tied to an available Pin.
In my case, if I want to clear the display, I have to do it with a small piece of code ( display.clear(); display.display(); ). No way to do it with toggling a pin!

Hi Sara,
may I point your attention to a new (or not so new) fact:
The TTGO LoRa32 SX1276 OLED Board has obviously changed it’s I2C pins.
It’s not any more as stated in the sketch:
#define OLED_SDA 4
#define OLED_SCL 15
#define OLED_RST 16
but
#define OLED_SDA 21
#define OLED_SCL 22
#define OLED_RST (N/A) 23

As OLED_RST is somewhere used in the sketch and I was too lazy to friggle throuh the lines I used pin 23 which is the LORA reset but works out fine.

Thanks for your detailed instructions, this helped me to get the display alive again.
Best regards
Peter

Hi.
We try to read all the comments. But with so many blog posts, it’s difficult to keep up and respond to all of them.
I’m sorry if I didn’t see your question.
Regards,
Sara

fantastic tutorial, thank yo. Strange, I posted a comment – and some questions – here last week but it never appeared in this listing. Are you still reading these postings? I would appreciate if you do because I have some question that I would like to ask you related this topic. Looking forward to your response – thank you, kind regards, Berx

Hello! I want to pair Esp 32 and my computer. I want to send data from my computer to esp32 and transfer the data via rs232 cable using the button. Any chance you can help?

I’m using TTGO T-BEAM v1.2 boards for Lora project. I need to calculate RSSI and SNR values. So I tried the code same like the tutorial with some pin changes for OLED. I am unable to get the RSSI values in the end as a result.