Esp32doitv1-aithinker-r01-sx1278: SX1278 radio.begin() failed, code: -2

kobold81 · December 30, 2023, 9:55pm

Hello,

I have successfully flashed esp32doitv1-aithinker-r01-sx1278 using the web flasher onto the esp32 board and connected that to a “AI Ra-02” board. When I connect the serial monitor, the last message is

rtl_433_ESP(3): SX1278 radio.begin() failed, code: -2

I must have messed up the wiring but I have cheked that twice…
I really appreciate your help

esp32doitv1 → RA-02
D23 (miso) → miso
D19 (mosi) → mosi
D15 → DIO0
D4 → DIO1
D16 → DIO2
D17 → RST
D5 → SCK

nikito7 · December 30, 2023, 10:52pm

5 cs
18 sck

github.com

NorthernMan54/rtl_433_ESP/blob/main/example/OOK_Receiver/README.md#sx127x-ai-thinker-ra01-transceiver-module

This is a sample implementation of the rtl_433_ESP library with the CC1101 or the SX127X (Heltec) Transceiver Module.

# Building and implementing the sample

To build and deploy the sample I used Visual Studio Code and PlatformIO.  This development environment will pull in all the required libraries as part of the build.

1 - Clone the rtl_433_ESP library to a local directory

 git clone https://github.com/NorthernMan54/rtl_433_ESP

2 - Start Visual Studio Code, and 'Open Folder' from the `rtl_433_ESP/example/OOK_Receiver` directory

3 - Select and build either the `esp32_cc1101`, `esp32_heltec` or `esp32doitv1_r01` environment

# Transceiver Module Wiring

## CC1101 Transceiver Module

| CC1101 PIN | ESP32 GPIO | Compiler Definition | Notes |
| ---------- | ---------- | ------------------- | ----- |

This file has been truncated. show original

kobold81 · January 3, 2024, 11:03am

Thank you very much for your help.

What I missed is that on the RA-02, the “NSS” connector is CS

With these connections, it works:
esp32doitv1 → RA-02
D23 (mosi) → mosi
D19 (miso) → miso
D15 → DIO0
D4 → DIO1
D16 → DIO2
D18 → SCK
D17 → RST
D5 → NSS (=CS)