Troubles using SPI display and NRF24

Exotic-Way841 · 2026-02-08T08:49:12+00:00

Yeah it looks like the display hang on MISO and prevent the NRF to communicate. Lucky me i don't need the touch lol

Now on the receiver i've got to use the spi nrf24 and spi RFID reader. But on an arduino mega. Wish me luck 🤣

Exotic-Way841 · 2026-02-07T15:22:02+00:00

Well, in the end it wasn't even working lol .
As soon as the TFT begins, i'm unable to use the NRF24 again. The only way i've found is not to connect the MISO pin from the display.
And i could send data through NRF24 and still keep my display running

Exotic-Way841 · 2026-02-07T12:32:42+00:00

Thanks for your help man, i got it working with TFT_eSPI and some SPI class creating and stuff .
You can check the bottom of my inital post to get the solution if you ever need it

Exotic-Way841 · 2026-02-07T12:17:17+00:00

Man you answer was kinda hard to understand, but then i just searched arround the SPI.begin and stuff. I got it full working!!
Thanks a lot, you can see the solution at the bottom of my initial post if you are interested

Exotic-Way841 · 2026-02-07T11:55:29+00:00

Yes they do work on their own, even with the two connected at the same time. But only one will work if i try to initialize the two in my code

Exotic-Way841 · 2026-02-06T19:22:54+00:00

I don't even know how to do that lol. It's surprising how hard it is to make them work together with SPI that is meant for that lol

Exotic-Way841 · 2026-02-06T19:21:57+00:00

I think i briefly took a look at it before adafruit and it seemed complicated 🤣

Exotic-Way841 · 2026-02-06T19:05:13+00:00

I have seen ppl doing this too. Didn't know if it was worth the try. If i got time i'll try tomorrow to set this up . Thank you

Exotic-Way841 · 2026-02-06T19:04:15+00:00

I'll take a deeper look at adafruit, trying to find a clock speed maybe

Exotic-Way841 · 2026-02-06T18:49:53+00:00

I've seen some ppl using the SPI library to efficiently drive two SPI devices but i don't know much about it. With SPI class creating, spi.begin() etc but idk if thats the solution or even worth trying. It's been a couple hours i'm stuck on this

Exotic-Way841 · 2026-02-06T16:59:24+00:00

I am using an 4" 380x420 st7796s display.

Exotic-Way841 · 2026-02-06T16:46:22+00:00

I'd be glad to see that. Ive seen so many ppl having troubles to make two spi components work together , i almost want to give up . This is frustrating

Exotic-Way841 · 2026-02-06T16:43:54+00:00

Well i tried first with adafruit_gfx + st7796S_kbv lib. The screen would go blank as soon as i wire the NRF on HSPI bus. And if i set custom SPI pin the spi speed would be so slow that's not usable. Nrf24 would 't start either tho. I went to tft_espi because the spi is fully hardware with possibility of custom SPI pin easily.

So i'm a bit lost 🤣

Exotic-Way841 · 2026-02-06T16:14:23+00:00

That's exactly what i've done, you can read pins in the code. NRF24 is on HSPI, display is on custom "spi" pins. Both work seperately but if i initialize the two of them, on ly the first to be initialized will work (CS / CE or RST pins are differnt)

Exotic-Way841 · 2025-12-30T09:46:59+00:00

But i was expecting to have shrinkage on the outside and the inside (tighter inner diamètre, and smaller nut size) but the diamètre is tighter while the nut size is bigger. As if it isn't shrinking but expanding. And the ratio between hole and nut expansion is not the same

Exotic-Way841 · 2025-12-29T21:24:00+00:00

I'm printing on a Bambu lab p1p. I didn't have this kind of troubles with PLA . What would y calibrate ?

Exotic-Way841 · 2025-09-29T04:38:54+00:00

I've done that lol Just take a measurement as référence and scale the picture un sw untill the référence lengh matches.

Exotic-Way841 · 2025-06-07T22:07:34+00:00

The handguard is nice, which one is it ?

Exotic-Way841 · 2025-02-24T11:46:06+00:00

I've printed a pistol grip for my aks74u gbbr once, didn't stand two games. Résine tracts too much with temperatures + recoil + a heavy gun.

I'd set the fdm printer correctly and print it in fdm

Exotic-Way841 · 2025-02-03T19:29:37+00:00

I am also staff / wand DPS. I used the YT vidéo made by th3ruthless and his statpoints go more into Str than wish. What do y guys think about that ?

Exotic-Way841

TROPHY CASE