Overhead Camera StandView Instructable »
Sorting Rack for Screws and...View Instructable »
Serial is not forgotten, just hidden in plain sight. It's in your router giving you boot information, in your car disguiyed as LIN bus and probably in a million other places.For agricultural sensors - I would love to spread this bus but as an engineer, I must tell you about better options.In this case, wireless nodes are better with mesh topology (Zigbee, Thread) or if you are rich enough, you can choose Lora or 4g narrowband (NB-IoT).I developed this bus for my hackerspace/makerspace/eduspace - the box is not ready yet, but there will be boxes, you should insert your ID and it will request some information from a Raspberry Pi server. I needed an inexpensive communication wired method.
Great question!First, the distance. I²C is limited in distance, probably a meter tops. With this, you can go up to a kilometer @ 9600 bps.Speed - it's limited by the serial port and the CAN to 1 Megabit (but the distance is limited to about 25 meters if I remember correctly), but the typical serial speed never goes oves 115200, so let's say it's slower a bit.Third and this is also important: you can easily implement a PC sniffer and connect regular computers in this bus with an inexpensive hardware an no special driver is needed, while I²C could be tricky.Also, the most important part is that pesky level problem: 3.3 vs. 5V I²C bus, not a problem with this!
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Rolling PlantsView Instructable »
I have seen wood cutouts too, it's much harder to make, but really durable. Also just marking the tools is an option on a wall. In my case, drawers are easier to use.
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