I'm looking to have two ESP32 devices, which are connected to the same local network, to call each other. I can do this currently with the VOIP example in the ADF but it requires a PBX server to route the calls. My wish is to have the SIP calls happen without the PBX server, from one esp32 directly ...

I think I just found the solution.

The LCD drivers were initializing as half duplex, whereas the ESP32 slave was full duplex.

I init the LCD driver as full duplex and the issue went away.

Out of interest, why did it portray this particular behaviour?

I have an ESP32 master, which is connected to an ESP32 slave, and a LCD (ILI9488 4" Display) slave. The ESP32 master and ESP32 slave communicates correctly. And so does the ESP32 master with the LCD when they are not on the same bus. So they both work fine if they are on separate SPI busses (one use...

Victoria Nope wrote: ↑

Sat Jan 02, 2021 5:26 am

Check the LVGL project for ESP32.

Thank you @Victoria Nope

What good ESP32 TFT libraries compatible with ESP-IDF are there that are updated regularly? I like loboris' library, but he uses his own modified SPI library and I'm seeing some issues with my other SPI devices and I'm not sure if it's because the two libraries are 'clashing' (I don't yet know the u...

I found that the issue is something to do with the ISR. The following init before my camera init seems to solve the issue. Not 100% sure why this is, and feels like a hack so if anyone has any info, please comment!

Thanks @Agree007, I have some 3.5" displays configured already .

I'm looking to see if anyone is aware of any larger screens.

Thanks for your reply.

Hello all, I've been wanting to use an ESP32-CAM as a SPI slave to another ESP32 module. The example SPI slave code on IDF V3.3 works very well, along with the ESP32-CAM demos from Github. However when I join the two firmwares together, the camera initialization fails. When I comment out ret=spi_sla...

Which displays have you guys used or heard of that can interface with the ESP32, ideally via SPI that are of such size?

I've read on the forums that MISO pins are good for this purpose.

What downsides are there to using the GPI pins as opposed to the GPIO pins for purely receiving input to the MCU?

Thanks .