![]() ![]() ![]() What's inside the Flipper Zero processorįlipper Zero's firmware is stored in Flash memory on the STM32WB55RG microcontroller, the heart of the whole device. Since we don't have free space to work with, the classic OTA update won't work in our case. When rebooting the old firmware is replaced by the new oneĪ classic OTA Update is impossible for Flipper Zeroįlipper Zero's firmware is about 700KB in size and together with the Radio Stack the memory is completely exhausted.The new firmware is transferred to the available space on MCU's Flash.The old firmware is running and manages data transfer over Bluetooth.It needs the old firmware running during the update process to control data transfer over Bluetooth while the new firmware is being uploaded next to the old one.Īccording to the manufacturer, it should work like this: In theory, our microcontroller supports OTA updates. The hard part of OTA is that at any given time the device has to run some kind of firmware to supervise the update process. The first iPhone was released in 2007, but you could only update it over the air in 2011 with the release of iOS version 5.0 for iPhone 3Gs. It took Apple 4 years to develop OTA since the release of the iPhone. Updating firmware over the air is in no way a trivial process. We've all gotten used to it and it seems totally normal now, but that wasn't always the case. You don't need to connect your phone to a PC to update the firmware, it updates over the internet. Download the Flipper Mobile App The Problem of Classic OTA UpdateĪll modern devices provide Over-the-Air ( OTA) firmware updates. In this post we will talk about why the Over-the-Air update was so hard to implement on Flipper Zero, how memory is arranged inside our STM32WB55 microcontroller, and will look at the firmware update process before and after. The new firmware update subsystem will be added to the qFlipper desktop application as well. ![]() You can now update firmware and databases on the SD card via Bluetooth using our mobile app! Download the mobile app for Android and iOS. We were working on this for several months and are finally ready to announce a new firmware update subsystem. ![]()
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