ESP32 wrover - Running 8mb firmware on 16mb

[jojojijijojo]

Hi,
Quick question, if I develop an application that runs on wrover 8mb version with appropriate partition table to fit 2 OTA (2mb each) and a factory of 2mb, would it still run if I flashed into a 16mb version wrover without any modifications?

[ESP_Sprite]

Yes. Firmware detects the larger flash and tell you about it, but given your partitions fit the flash, it will run.

[jojojijijojo]

Ok great thanks, because I might have different batches with different flash sizes, and just want to make sure that they would all receive OTA and update just fine.

[jojojijijojo]

Just a follow up on this.
I had a flash program compiled with 16mb option checked, but also automatically detect flash size option.
When I flashed into an 8mb wrover, it broke nvs and was unable to get wifi working. This was with a partition table that fits on 8mb.

So apparently if esp flash size is smaller, it won't work work even if partition table fits perfectly on an 8mb space.