thank you for your answer

I guess I accept the challenge and keep you posted :)

after more research and testing I am pretty sure that the current optiboot development branch (https://github.com/Optiboot/optiboot) is the best way to go.

I can successful compile and flash the standard optiboot sources for the ATmega328 and ATmega2560.

One of the next steps are

• use an RF24 shield to test the current branch of https://github.com/mysensors/MySensorsBootloaderRF24 with an 328 and 2560.
• port to optiboot and call "MySensorsBootloader();" using RF24
• port the RF24 related RX/TX functions to my serial interface (CAN-Phy)

I am still wondering why nobody ported this before - what am I missing?

~Martin

which controller do currently support the auto-id assignment?

Is this meant by "node ID generation" in the Controller comparison table?

After some intensified research, I am pretty sure, that my desired OTA (MySensor sketch directly to MCU flash without requiring external flash (DualOptiBoot requires flash) and being transport-agnostic (not MYSBootloader uses RF24)) with a 2560 can be done with the optiboot-fork bootloader by MCUdude (for the ATMega 2560 the variant is called "MegaCore", see https://github.com/MCUdude/MegaCore/). The MegaCore provides some macros for the SPM (storage programable memory) functions, which are passed to the bootloader like __boot_page_fill_short, __boot_page_write_short and __boot_page_erase_short.

The repository comes with precompiled bootloaders as .hex files and a nice Arduino GUI integration (see wiki).

My next step is to integrate the example sketch SerialReadWrite.ino into MySensors/core/MyOTAFirmwareUpdate.[c|h].

Currently I am still a bit confused about the used defines. As far as I understand the

#define MCUBOOT_PRESENT represents the MySensors bootloader by Tekka,
the #else or #ifndef MCUBOOT_PRESENT branches are for the DualOptiboot bootloader (which is somehow deprecated).

It looks like several defines are declared in #include "generated_dts_board.h", but I cannot find the file. Also there must be some kind of #include towards the dualoptiboot or mysensors specific bootloader header files, right?

Hi,

I have been searching the web for a while now, but I am still confused about all the OTA stuff, which seems only to work on 328 devices for MySensors.

For a sensor node I want to use an ATmega 2560 (can't use 328), which is supported by the current Optiboot v8 by westfw (https://forum.arduino.cc/index.php?topic=570160.0).

Is it possible to use optiboot v8 with MySensors? The DualOptiboot project does not support the 2560, was not updated for a long time and looks deserted to me.

I have been digging around in optiboot's and dualoptiboot's code for some time, but I am not sure where to begin yet (as I did not understand much of the bootloader magic)

The current optiboot v8 also supports direct EEPROM writes via the dospm function. (see git optiboot\optiboot\examples\test_dospm). Does this help in any way to integrate it into MySensors?

If you could point me in a promising direction I would be happy to contribute the results :)

Martin

Hi mfalkvidd,

thanks for your answer. Today I realize, that I must have been very confused yesterday and mixed up some things and wrote some BS....

To clarify for me and others: The ESP has built-in BT and Wifi interfaces. There are no additional nordic NRF whatever peripherals :)

Also the Philips Hue uses Zigbee, which is not Bluetooth-compliant.

However are there more examples how to use the ESP32 in a MYSensors environment? Could not find much about the interfacing between Node and Gateway...

Hi,

i am developing a wired RS485 environmental sensor node for our rooms at home, using the BME680 to measure temperature, humidity, air quality and additional sensor for light intensity and an LED as a night-light.

The prototype is based on a ESP32 and is currently working well. The sensor nodes should later be hidden in flush-mounted boxes and are powered by 24V.

As the esp32doit-devkit-v1 also supports WLAN and Bluetooth, I am wondering, if I could use the Bluetooth and the RS485 connections for future applications in parallel. Possible use cases would be a RS485 to BT relay to control Philips HUE lights or just use the BT to act as a relay in a mesh.

Enabling both interfaces in my code

#define MY_RS485
#define MY_RADIO_RF24

results in

error: #error Only one forward link driver can be activated
#error Only one forward link driver can be activated

Are these use cases somehow possible?

Martin

as a newbie to Mysensors and platformio this took me a while with the same problem.

The solution (like described above, but not understandable for me at first) is:

platformio.ini add 
lib_deps =    https://github.com/mysensors/MySensors.git#development

which currently links to Mysensors 2.3.2-beta #ea093e5

and the errror is gone :)