OTA Updates

Created by Miroslav Biňas / mirek

### How many times have you received a notification on your mobile to update to the latest version of your OS?

## What is OTA? > the ability to download applications, services and configurations through a mobile or cellular network > ([Gartner](https://www.gartner.com/en/information-technology/glossary/ota-over-the-air))

## OTA Benefits * continuous improvement of devices * increase functionality * improves security * save cost

## Live Example

## Whats wrong?

### OTA services must be fast, secure and easy to use.

## Design Considerations

### Incremental Roll-Out of OTA Updates

### Recovery of Versions

### Code Compatibility Verifications

### Secure Communication

### Partial Updates

### Authenticating the OTA Update Image

### Security from Physical Attacks

### Minimizing Intrusion


## Existing Solutions * [FreeRTOS](https://www.freertos.org) * [Mongoose OS](https://mongoose-os.com) * [balena.io](https://www.balena.io) * [Barbara OS](https://barbaraiot.com)

## What's the Time?

## RTC > A real-time clock (RTC) is a computer clock (most often in the form of an integrated circuit) that keeps track of the current time. > ([Wikipedia](https://en.wikipedia.org/wiki/Real-time_clock))

[](https://www.alza.sk/asus-prime-h310m-r-r2-0-d5535927.htm)


 * notes: * https://en.wikipedia.org/wiki/ESP32

## NTP > The Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networks. > ([Wikipedia](https://en.wikipedia.org/wiki/Network_Time_Protocol))


## [www.ntppool.org](https://www.ntppool.org)

## `ntptime`

## Questions?