Looking for help with ESP32 + SX1276

iijao-balloon
Wed, 28 Jan 2026 15:14:47 +0000

Thanks, but I can’t fix it. I think the problem is, that I use an ESP32 S3 Cam, many pins are needed for the Cam and SD-Card. So I don’t use the default pins. Have you ideas, how to solve that? Here as a complete pinout:

Pin | onboard-part | onboard-function | external part | external function | VCC in V
0 | | BOOT | Servo 1 | |
1 | | LED IO2 | GY63 | SCL | 3,3
2 | | | SX1276 | Interrupt-Pin DIO0 | 3,3
3 | | JTAG EN | Servo 2ADC V-in Sensor | |
4 | Camera | SIOD | | |
5 | Camera | SIOC | | |
6 | Camera | VYSNC | | |
7 | Camera | HREF | | |
8 | Camera | Y4 | | |
9 | Camera | Y3 | | |
10 | Camera | Y5 | | |
11 | Camera | Y2 | | |
12 | Camera | Y6 | | |
13 | Camera | PCLK | | |
14 | | | SX1276 | Reset-Pin | 3,3
15 | Camera | XCLK | | |
16 | Camera | Y9 | | |
17 | Camera | Y8 | | |
18 | Camera | Y7 | | |
19 | | USB_D+ | | |
20 | | USB_D- | | |
21 | | | SX1276 | NSS/CS |
35 | PSRAM | PSRAM | | |
36 | PSRAM | PSRAM | | |
37 | PSRAM | PSRAM | | |
38 | SD Card | CMD | | |
39 | SD Card | CLK | | |
40 | SD Card | DATA | | |
41 | | MTMS | GPS/SX1276 | RX/DIO1 | 3,3
42 | | MTDI | GPS | TX |
43 | TX | LED TX | MOSFET 1 | |
44 | RX | LED RX | MOSFET 2 | |
45 | | | SX1276 | SPI-SCK (VSPI) | 3,3
46 | | | SX1276 | SPI-MISO | 3,3
47 | | | SX1276 | SPI-MOSI | 3,3
48 | | WS2812 | GY63 | SDA | 3,3

And I’ve read, that the ESP32 S3 is unstable with the library I use, are there better alternatives?