Raspberry pie USB miner

1. The power supply of PI power supply is only 750ma, and it occupies 500mA. When the USB device is inserted, there will be instantaneous current, which will lead to the self recovery of the fuse, resulting in the restart.

2. You can use the same gun and wire on other computers. If you can use it, it means there is no problem with the scanner gun and wire. Then you connect the machine to your computer to see if the computer can recognize the scanner gun. Some guns need to install the driver automatically after they are connected. You can see if the driver is installed on your computer, If you can hear a normal "drop -" sound, it means that the decoding of the barcode gun is normal. If there is no word, there are the following possibilities: 1; 2. Scan gun interface setting error; 3. Failed to connect with the computer correctly; 4. Data line fault; 5. Scanning gun hardware failure, etc

3. Hello, vctpfnfmk, is your mobile hard disk's connecting cable Y-shaped? If it's Y-shaped, you can plug the power supply port into the computer's USB port or any USB port that provides power supply. If it's not Y-shaped, you have to buy an active USB hub. I also remind you that when you buy an active USB hub, the output current of the power adapter must reach 2a, otherwise it won't work, and you will experience it yourself. I bought one on Taobao and returned it because of this problem

4. WiFi mode. Raspberry pie can be connected to AP mole to transmit WiFi signal, and each single chip microcomputer is connected to this WiFi, so that all devices can realize two-way communication. Can also get a router, raspberry pie and microcontroller are connected to the router, the same principle.

5. If the serial port is connected to arino, it must always be open. If it is closed and reopened, arino will restart, which is a function set in the bootload of arino
if you have enough ability, you can try to modify the bootload of your corresponding arino board so that it will not restart. Of course, this is troublesome. Of course, you can also modify your program on the pie to keep the port occupied after it is opened. Don't close it after it is used up. This is OK
however, if you call the C program with PHP, it is estimated that the serial port will close automatically after calling. You need to redesign your call.

6. may not. Normal USB port supports 500mA output, but less raspberry pie. Even if you barely get the drive to run. It is also possible that the hard disk will be damaged e to the voltage problem

I tried it myself. My own hard drive. 1 5TB, it can't be carried

I have a USB hub on my monitor, which is active. It's okay to get on that

in addition, I used an SD card adapter, which can be directly connected to raspberry pie. It took months. But once I gasped and broke a 16GB TF card.

7. I read the sweeper data with raspberry pie.