You can also see the jumper wires to connect the reuired signals to the ports on the arduino. Here is a picture of the changes on my USB host shield v1.21. USB host shield v.2.0 USB host shield v.1.21 Its just a matter of choice and what other boards you are using and need to avoid conflicts. The other major difference between the two boards is the way you can select the arduino pins you want to use. If you want different pins from the standard you need to solder small wires to the appropriate pins and also changes this in the library. You can see this in the picture of my implementation. With 1.21 you will need to modify MISO handling. Cut the ground line from U6 pin 1 and connect this pin to SS (the easiest way to do it is to melt the solder and then carefully lift pin 1 off its pad and then run the wire from this pin to U7 pin 8). You can see how this has been done in the revison 2.0 implementation on the left and the 1.21 implementation on the right. I have an older shield which is version 1.21. The admin Oleg Mazurov is very friendly and responds quickly to any question. I have used this shield for the violet-mirror implemention and also the mail notifier. There are many devices that have already been implemented. So far I have the USB Host Shield set up on one Arduino Uno, connected to the standard USB port on another.The USB host shield allows you to connect a USB device to the arduino. but looking at the mega I noticed that it has two rows for its digital pins, while the shield in question looks like.
Ethernet shield was not modifed and so it should use Pin 10. So the USB shield uses now pin 7 for SS and it works. They use both SS at pin 10, so I have moved it on USB Host Shield to pin 7, updated the UsbCore.h. It clearly says in the description that it is for an arduino uno (and the photo looks like an Uno shield). I am using Arduino Due + USB Host Shield + official Ethernet shield.
Note that the distance between digital pins 7 and 8 is 160 mil (0.16'), not an even multiple of the 100 mil spacing of the other pins. Four screw holes allow the board to be attached to a surface or case. I'm working on a project that needs to use USB to pass serial messages between Arduinos (I can't use I2C or SPI for a few reasons – I especially need USB's support for hot-swapping and address allocation). Circuits At Home 2011 USB Host Shield Quality Control Routine Reading REVISION register. The maximum length and width of the Motor Shield PCB are 2.7 and 2.1 inches respectively.
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