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1  Using Arduino / Networking, Protocols, and Devices / Re: USB Host Shield library v.2.0 released on: September 07, 2013, 01:51:20 pm
Communicating to a digital scale -> http://www.circuitsathome.com/mcu/adding-a-display-to-a-digital-scale-using-arduino-and-usb-host-shield
2  Using Arduino / Networking, Protocols, and Devices / Re: USB Host Shield library v.2.0 released on: June 17, 2013, 09:30:27 pm
Mass storage -> https://www.circuitsathome.com/mcu/mass-storage-support-for-usb-host-library-2-0-released
3  Using Arduino / Networking, Protocols, and Devices / Re: USB Bluetooth modules? on: March 03, 2013, 04:43:12 pm
My USB Host Shield 2.0 for Arduino supports Bluetooth SPP as well as HID for select game controllers like Sony PS, Nintendo, etc. -> https://www.circuitsathome.com/category/mcu/arduino/usb-shield/bluetooth
4  Using Arduino / Networking, Protocols, and Devices / Re: Circuits @ Home USB host shield "waiting for device" on: December 12, 2012, 08:46:03 pm
Here's the schematic with pin numbers as per Arduino Pro Mini -> https://www.circuitsathome.com/chome_downloads/UHS_mini_10.pdf Also make sure your Atmega is powered from 3.3V otherwise USB Host shield won't be able to detect USB device on the bus.
5  Using Arduino / Networking, Protocols, and Devices / Re: Problem w/ USB-Host Shield on: November 13, 2012, 08:12:28 pm
I'm not saying it's broken. What I can see is SPI is not receiving, I can't say which direction is not working or even if a clock is reaching the MAX3421E, all I see is all ones instead on number 03. To troubleshoot further you need an oscilloscope with >10MHz BW.

You can send the shield back, I'll test it and replace it if defective. But I almost never see defective SPI and very often see bad soldering.
6  Using Arduino / Networking, Protocols, and Devices / Re: Problem w/ USB-Host Shield on: November 13, 2012, 06:04:09 pm
The SPI interface is not working, likely due to bad soldering of 2x3 header. You need to double-check the solder job here - remove the flux and use a magnifier. Also, check continuity between boards. If you have an oscilloscope, this article shows how to troubleshoot SPI on USB host shield -> https://www.circuitsathome.com/mcu/arduino/usb-shield/troubleshooting-arduino-usb-host-shield
7  Using Arduino / Networking, Protocols, and Devices / Re: Problem w/ USB-Host Shield on: November 13, 2012, 02:22:53 pm
Have you tried board_qc sketch yet -> https://github.com/felis/USB_Host_Shield_2.0/blob/master/examples/board_qc/board_qc.pde . This is what I use to check the boards before shipping. Try it and post the results. You will see GPIO error - just skip it.
8  Using Arduino / Networking, Protocols, and Devices / Re: how to send data from SPI Slave Arduino to SPI Master Arduino on: November 05, 2012, 12:28:11 pm
In SPI, only master can initiate a transfer. Also, there seems to be no support for slave mode SPI in standard Arduino library.
9  Community / Products and Services / Re: USB Host Shield 2.0 on: October 25, 2012, 11:54:11 pm
What version of Arduino IDE are you using?
10  Using Arduino / Networking, Protocols, and Devices / Re: SPI slaves HID on: October 09, 2012, 01:38:12 pm
The OP told nothing about software support.

The OP told about reading USB devices. In this case, software support is implied; you can't use this (or any other) shield without some supporting code. As far as simply stacking shields on top of Arduino board, you can use any number of them, especially if you are not planning on applying any electrical power to this stack (otherwise I suggest not exceeding 50).
11  Using Arduino / Networking, Protocols, and Devices / Re: SPI slaves HID on: October 09, 2012, 11:36:05 am
I designed the shield and wrote the code. The low-level support is static, you can't have more than one copy of it.
12  Using Arduino / Networking, Protocols, and Devices / Re: SPI slaves HID on: October 09, 2012, 11:01:58 am

I want to use an Arduino UNO as SPI Master and two Host USB Shield from Circuit@Home as SPI Slaves.


You can't connect two USB Host shields to an Arduino. The shield supports USB hub, you can talk to several USB devices simultaneously via a single shield. 

13  Community / Products and Services / Re: USB Host Shield 2.0 on: September 28, 2012, 04:51:26 pm
Could be - I'm not paying much attention to this particular board.
14  Community / Products and Services / Re: USB Host Shield 2.0 on: September 27, 2012, 02:18:19 pm
The Arduino board you're using is Mega ADK, you can't use this shield with it. The board has USB host built in and I heard it's possible to use it with my code. Check the USB Host 2.0 forks on gitHub.
15  Community / Products and Services / Re: USB Host Shield 2.0 on: September 27, 2012, 01:06:01 pm
You don't need to worry about addressing. This sketch can be used to check if everything is put together correctly-> https://github.com/felis/USB_Host_Shield_2.0/tree/master/examples/USB_desc
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