OTA Programming from RPi & SPI

[brolly759]

more cool stuff? Tell me tell me tell me!!

[Felix]

Youll have to wait and see 

[WhiteHare]

I hope whatever you come up with will work on a Raspberry Pi 3!   

[Felix]

Does it not work on a Pi3 now with the latest python script?

[brolly759]

Felix, I am about to work on OTA soon, the flash chip I got was the wrong version, go figure. I had a quick question. The Arduino + RFM69 that sits on the Pi / PC.... That doesnt need to be reprogrammed everytime I want to do an OTA? In other words, can I have the OTA functionality and the Gateway functionality on the same run code?

Thanks

[Felix]

I had a quick question. The Arduino + RFM69 that sits on the Pi / PC.... That doesnt need to be reprogrammed everytime I want to do an OTA? In other words, can I have the OTA functionality and the Gateway functionality on the same run code?

You could yes, the OTA protocol (current and future) changes the frequency (this is enabled by default in the RFM69_OTA lib) so it stays clear of the "main" transmit channel. So the OTA happens in some 1mhz or so frequency below/above the main channel. You can keep your functionality combined with OTA gateway on your gateway arduino, although I would recommend using another board for OTA purposes (so the gateway would not stay "busy" while OTA in progress...).

[brolly759]

How long is the OTA process per node?

[Felix]

See my blog on the Wireless Programming subject for more details, but about 14seconds for a 15K sketch.
That's subject to change.

[brolly759]

Are there other MCU's that are supported for OTA like ARM or comparative?

[Felix]

The OTA protocol is platform agnostic, it doesn't care how you get that image over to the target.
I believe the RFM69 lib supports certain ARM chips as well.

[brolly759]

I meant if the end node was an ARM processor.... not a 328p

[Felix]

I am AVR so no clue which ARMs it works on, there are thousands of variants. But I believe it does on the samd21.