To start your journey of Raspberry Pi platform, you must device which operating system will be most suitable for your IoT installation, to ensure best software platform for your use-case. Some versions of Debian, such as Raspberry Pi OS or Raspbian are most common, but you can choose custom distribution of Linux, such as Yocto.
Debian (Raspberry Pi OS or Raspbian) for your Raspberry Pi is a great starting point as everything you need is in the software stack already. It is easy to get started with, and as you get more comfortable and specialised you can move on to a more specialised stack – the customised Linux distribution such as Yocto and Buildroot. The more specialised work can be done later if you have OTA software updates supported on the device, you can easily move your software stack. You should ship your device while still developing and evolving.
Source: https://mender.io/blog/debian-operating-system-and-software-platform-for-your-raspberry-pi
Upgrading Debian for Raspberry Pi with Yocto or Buildroot later
In Debian (Raspberry Pi OS or Raspbian) for your Raspberry Pi you will have a lot more moving parts and software that may not necessarily be needed. With Yocto and Buildroot, you will have smaller images, so your costs will be less for bandwidth. There is a 10x difference in image size between Debian and Yocto or Buildroot. By using a custom Linux distribution, you can save network cost and bandwidth usage. You will save on resources over time, reducing the image size so you only transfer the software you need and not the parts which you are not going to use. You will only have to ship the difference in image you need – the so-called delta update. Once you have a minimal image set up, you can think about only updating applications, only updating the container you have running, or even turning off the connection to the device for certain periods of time to save on battery and system resources.
Source: https://mender.io/blog/debian-operating-system-and-software-platform-for-your-raspberry-pi
ModBerry 500 CM4 an ultimate solution for IoT monitoring
TECHBASE’s ModBerry industrial computer series has received an update to Raspberry Pi Compute Module 4 and is available for orders. TECHBASE is leading manufacturer of Industrial Raspberry Pi and Industrial Compute Module solutions. ModBerry 500 series is fully compatible with all releases of Compute Module from Rasbperry Pi foundation.
Main features of updated device are:
- up to 4x faster eMMC Flash with up to 32GB storage
- up to 2x faster performance of CPU appllications than previous CM3 version
- up to 8x more RAM (8GB LPDDR4-3200)
- 1Gbit Ethernet interface
- PCI 2.0 card support for NVMe SSD drive (via M.2)
- two PCIe support for wireless modem solutions, i.e. LTE/5G modems
- Wide range of wired and wireless interfaces