Hex size is not reducing size while converting to zip

[Sawan Kumar]

I tried to reduced my hex file's size while converting to zip but it doesn't get size under 256KB due to which I am getting an error: Data size exceeds the limit.

Below are the screenshots for reference.

I need help to resolve this problem,

[Andy]

Mm I just noticed that you're developing on an NRF51. That series only has SoCs with up-to-256 KB of Flash. The NRF52 series has SoCs with up to 1 MB of Flash.

Anyway, I'm not sure how are you even programming a 400 KB image onto a 256 KB memory.

[Andy]

Well actually, you don't really need to care about the size of the hex file. You need to care about the size of the binary. The hex file can be larger.

[Sawan Kumar]

When I create hex file from makecode and flash it using usb is woking but when try to do it over Bluetooth it's not working

[Sawan Kumar]

Binary is still same size of hex and is not reducing

[Sawan Kumar]

Because Samsung microbit hex2bin converter is reducing size but its not woriking in ios lib of IOS-Pods-DFU-Library.