My log says that "No FabScanPi HAT or compatible device is found". What can i do?

Posted by: @mario

If you are have the Message "No FabScanPi HAT or compatible device found" in your log file you need to check the following options.

1. First double check the solder joints of the 40-pin Header of the FabScanPi-HAT. If you are sure that there are no 'cold' solder joints move on reading, otherwise resolder those joints. Try again and have a look to the logs. If the error still occurs continue reading with 3.
2. Check if your fabscanpi-server version is 0.8.0 or higher. Have a look into your default.config.json and check the serial baudrate. It should be 57600 for fabscanpi-server >= 0.4.2. If you changed the baudrate and the error still occurs continue with reading 3.
3. Your bootloader is bricked, what means that you need to flash a new bootloader to your FabScanPi HAT. Continue with reading "How to flash the FabScanPi HAT Bootloader?"

How to flash the Bootloader?

! If you want to leave the HAT connected to the pi during the flashing process. Be sure you stopped the FabScanPi Server. You can use the following command to do that. !

$ sudo /etc/init.d/fabscanpi-server stop 

Option A: Using Raspberry Pi for flashing.

Connect the FabScanPi HAT pins as described below. (solder some wires to the solder pads). Use a resistor 2k2...5k6 in series for every signal. (see picture for details)

RPi  -> Target
IO25 -> Reset
IO11 -> SCK
IO10 -> MOSI
IO9  -> MISO
GND  -> GND

Download bootloader:

$ wget  https://github.com/watterott/RPi-UNO-HAT/raw/master/docs/bloader.hex  

Edit the file avrdude.conf  and add the following lines:

$ sudo nano /usr/local/etc/avrdude.conf 
programmer id = "pi_isp"; 
 desc = "GPIO bitbang"; 
 type = "linuxgpio";   
 reset = 25; sck = 11;
 mosi = 10; 
 miso = 9;
;

Flash bootloader:

$ avrdude -c pi_isp -p m328p -e -U flash:w:bloader.hex:i -U lfuse:w:0xFF:m -U hfuse:w:0xD6:m -U efuse:w:0x05:m -U lock:w:0x0F:m

Option B: Using Arduino Uno (device ttyACM0 or ttyUSB0 ) for flashing.

Connection (Arduino Uno connected to RPi via USB):

Uno -> Target 
D10 -> Reset 
D13 -> SCK 
D11 -> MOSI 
D12 -> MISO 
GND -> GND

Download bootloader and ISP firmware:

$ wget  https://raw.githubusercontent.com/watterott/RPi-UNO-HAT/master/software/bloader.hex 
$ wget  https://raw.githubusercontent.com/watterott/RPi-UNO-HAT/master/software/isp.hex  

Flash ISP firmware to Arduino Uno:

 $ avrdude -c arduino -P /dev/ttyUSB0 -b 115200 -p m328p -e -U flash:w:isp.hex:i 

or

 $ avrdude -c arduino -P /dev/ttyACM0 -b 115200 -p m328p -e -U flash:w:isp.hex:i 

Flash bootloader:

$ avrdude -c stk500v1 -P /dev/ttyUSB0 -b 19200 -p m328p -e -U flash:w:bloader.hex:i -U lfuse:w:0xFF:m -U hfuse:w:0xD6:m -U efuse:w:0x05:m -U lock:w:0x0F:m

or

$ avrdude -c stk500v1 -P /dev/ttyACM0 -b 19200 -p m328p -e -U flash:w:bloader.hex:i -U lfuse:w:0xFF:m -U hfuse:w:0xD6:m -U efuse:w:0x05:m -U lock:w:0x0F:m

 

Thanks Mario, flashing the bootloader worked for me! So happy.

I download this hex file : https://github.com/watterott/RPi-UNO-HAT/blob/master/software/bloader.hex

and used to flash this: sudo avrdude -c pi_isp -p m328p -e -U flash:w:bloader.hex:i -U lfuse:w:0xFF:m -U hfuse:w:0xD6:m -U efuse:w:0x05:m -U lock:w:0x0F:m