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In this video I explore the DFRobot IO Expansion HAT for Raspberry Pi from DFRobot. I use it on both a Raspberry Pi Model 3 B and also on a Model 5. It replaces my obsolete Seeed Studio Grove HAT for Raspberry Pi which no longer works yet is still advertised and sold by them. I purchased the Seeed Studiop Grove HAT in 2019 and it was used in many projects including Farmbeats which was supported by Microsoft and the CSIRO. Now this Grove HAT is no longer compatible since 2023 and does not work with the more recent operating systems for the Raspberry Pi. At the time the Grove HAT had great resources including excellent nodes on node-red. So what was the problem? Seeed Studio had a design error in their firmware. They used an i2c address for their on-board MPU at 0x04 which is illegal by Raspberry Pi and after 2024 operating systems no longer supported it. Despite this Seeed still sells this HAT from their website - this is totally negligent!! Seeed is a "Just In Time" operator and bugger past customers! I purchaed over 10 of these HATs from Seeed and they all went into the bin! Despite this you can make the configuration work if you following a strick pattern of using the correct Raspberry Pi OS version and applications but you will be at leat 2 OS versions behind the current Rasspberry Pi OS (Trixie). So I needed a replacement for the Grove HAT and found a contender: DFRobot IO Expansion HAT. Will it work with the latest operating systems such as Bookroom & Trixie for Raspberry Pi? Is there sufficient software support for it? I use Microsoft Copilot to assist me with the software development. Different skills are needed to get Copilot to cooperate. It had very good responses for simple projects but tended to hallucinate for the more complex projects. I explore these issues in this video. I also explore the performance of the DFRobot IO Expansion HAT with over 26 DFRobot modules. I use both Raspberry Pi Model 3B and Model 5 for these projects. I mainly used components from DFRobot in their Gravity series. I explore the performance of 25 Gravity devices and got 23 to work. I also was able to make many of my older Grove devices to also work. Is the DFRobot HAT suitable for STEM Education? Only more advanced students should engage with it - it opens a new world of opportunities. References: DFRobot IO Expansion HAT for Raspberry Pi (https://www.dfrobot.com/product-1930....)