A simple ESP-IDF component and example project, used to flash firmware to ESP32 from.... ESP32 :)
The project contains an ESP-IDF component: DxFlasher, that wraps esp-serial-flasher component due to following reasons:
- To provide C++ component
- Make it easier to use and possibly extend to support more functionality in the future
Why do on earth we need to flash ESP32 from anothe ESP32, you may ask?
- Able to flash ESP32 without using computer/laptop/SBC (e.g Raspberry Pi) should be beneficial and practical, especially in the field.
- Because we can
Just look at main.cpp, should be self-descriptive.
Especially check function of loadHelloworldBinary. Notes:
- It loads example firmware which consists of 3 parts: bootloader, partition, and the app itself.
- The actual bins are in
binaries/Hello-world/ESP32 - Check
main/bin2array.cmaketo load another firmware files. It essentially convert all bin files to C array.
Pins connection between host and target MCU by default is as following.
| ESP32 (host) | ESP32 (target) |
|---|---|
| IO26 | IO0 |
| IO25 | RESET |
| IO4 | RX0 |
| IO5 | TX0 |
Of course, you can use other pins and specify them on DxESPFlasherConfig_t object.
This project is not possible without this awesome component: esp-serial-flasher