So I have that very nice small device with build in battery (works as a power bank too) here:
In the past I used this device with the images for the device A5-V11 which has the exact same hardware and specs but only misses the battery. For some reason the A5-V11 was EOL'ed in Version 17.01 while the MPR-A1 only was EOL'ed recently with 19.07.
I just tried to run a sysupgrade with luci but get the following error message:
The uploaded image file does not contain a supported format. Make sure that you choose the generic image format for your platform.
I expect it to because of the model change? Is there anything I could do to run a successful ota update?